create

Pods/gRPC-C++/third_party/upb/upb/base/descriptor_constants.h

@@ -0,0 +1,84 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_BASE_DESCRIPTOR_CONSTANTS_H_
+#define UPB_BASE_DESCRIPTOR_CONSTANTS_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// The types a field can have. Note that this list is not identical to the
+// types defined in descriptor.proto, which gives INT32 and SINT32 separate
+// types (we distinguish the two with the "integer encoding" enum below).
+// This enum is an internal convenience only and has no meaning outside of upb.
+typedef enum {
+  kUpb_CType_Bool = 1,
+  kUpb_CType_Float = 2,
+  kUpb_CType_Int32 = 3,
+  kUpb_CType_UInt32 = 4,
+  kUpb_CType_Enum = 5,  // Enum values are int32. TODO: rename
+  kUpb_CType_Message = 6,
+  kUpb_CType_Double = 7,
+  kUpb_CType_Int64 = 8,
+  kUpb_CType_UInt64 = 9,
+  kUpb_CType_String = 10,
+  kUpb_CType_Bytes = 11
+} upb_CType;
+
+// The repeated-ness of each field; this matches descriptor.proto.
+typedef enum {
+  kUpb_Label_Optional = 1,
+  kUpb_Label_Required = 2,
+  kUpb_Label_Repeated = 3
+} upb_Label;
+
+// Descriptor types, as defined in descriptor.proto.
+typedef enum {
+  kUpb_FieldType_Double = 1,
+  kUpb_FieldType_Float = 2,
+  kUpb_FieldType_Int64 = 3,
+  kUpb_FieldType_UInt64 = 4,
+  kUpb_FieldType_Int32 = 5,
+  kUpb_FieldType_Fixed64 = 6,
+  kUpb_FieldType_Fixed32 = 7,
+  kUpb_FieldType_Bool = 8,
+  kUpb_FieldType_String = 9,
+  kUpb_FieldType_Group = 10,
+  kUpb_FieldType_Message = 11,
+  kUpb_FieldType_Bytes = 12,
+  kUpb_FieldType_UInt32 = 13,
+  kUpb_FieldType_Enum = 14,
+  kUpb_FieldType_SFixed32 = 15,
+  kUpb_FieldType_SFixed64 = 16,
+  kUpb_FieldType_SInt32 = 17,
+  kUpb_FieldType_SInt64 = 18,
+} upb_FieldType;
+
+#define kUpb_FieldType_SizeOf 19
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE bool upb_FieldType_IsPackable(upb_FieldType type) {
+  // clang-format off
+  const unsigned kUnpackableTypes =
+      (1 << kUpb_FieldType_String) |
+      (1 << kUpb_FieldType_Bytes) |
+      (1 << kUpb_FieldType_Message) |
+      (1 << kUpb_FieldType_Group);
+  // clang-format on
+  return (1 << type) & ~kUnpackableTypes;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_BASE_DESCRIPTOR_CONSTANTS_H_ */

Pods/gRPC-C++/third_party/upb/upb/base/internal/log2.h

@@ -0,0 +1,38 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+///
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_BASE_INTERNAL_LOG2_H_
+#define UPB_BASE_INTERNAL_LOG2_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE int upb_Log2Ceiling(int x) {
+  if (x <= 1) return 0;
+#ifdef __GNUC__
+  return 32 - __builtin_clz(x - 1);
+#else
+  int lg2 = 0;
+  while ((1 << lg2) < x) lg2++;
+  return lg2;
+#endif
+}
+
+UPB_INLINE int upb_Log2CeilingSize(int x) { return 1 << upb_Log2Ceiling(x); }
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_BASE_INTERNAL_LOG2_H_ */

Pods/gRPC-C++/third_party/upb/upb/base/status.h

@@ -0,0 +1,46 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_BASE_STATUS_H_
+#define UPB_BASE_STATUS_H_
+
+#include <stdarg.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#define _kUpb_Status_MaxMessage 127
+
+typedef struct {
+  bool ok;
+  char msg[_kUpb_Status_MaxMessage];  // Error message; NULL-terminated.
+} upb_Status;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_API const char* upb_Status_ErrorMessage(const upb_Status* status);
+UPB_API bool upb_Status_IsOk(const upb_Status* status);
+
+// These are no-op if |status| is NULL.
+UPB_API void upb_Status_Clear(upb_Status* status);
+void upb_Status_SetErrorMessage(upb_Status* status, const char* msg);
+void upb_Status_SetErrorFormat(upb_Status* status, const char* fmt, ...)
+    UPB_PRINTF(2, 3);
+void upb_Status_VSetErrorFormat(upb_Status* status, const char* fmt,
+                                va_list args) UPB_PRINTF(2, 0);
+void upb_Status_VAppendErrorFormat(upb_Status* status, const char* fmt,
+                                   va_list args) UPB_PRINTF(2, 0);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_BASE_STATUS_H_ */

Pods/gRPC-C++/third_party/upb/upb/base/status.hpp

@@ -0,0 +1,50 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_BASE_STATUS_HPP_
+#define UPB_BASE_STATUS_HPP_
+
+#include "upb/base/status.h"
+
+namespace upb {
+
+class Status {
+ public:
+  Status() { upb_Status_Clear(&status_); }
+
+  upb_Status* ptr() { return &status_; }
+
+  // Returns true if there is no error.
+  bool ok() const { return upb_Status_IsOk(&status_); }
+
+  // Guaranteed to be NULL-terminated.
+  const char* error_message() const {
+    return upb_Status_ErrorMessage(&status_);
+  }
+
+  // The error message will be truncated if it is longer than
+  // _kUpb_Status_MaxMessage-4.
+  void SetErrorMessage(const char* msg) {
+    upb_Status_SetErrorMessage(&status_, msg);
+  }
+  void SetFormattedErrorMessage(const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    upb_Status_VSetErrorFormat(&status_, fmt, args);
+    va_end(args);
+  }
+
+  // Resets the status to a successful state with no message.
+  void Clear() { upb_Status_Clear(&status_); }
+
+ private:
+  upb_Status status_;
+};
+
+}  // namespace upb
+
+#endif  // UPB_BASE_STATUS_HPP_

Pods/gRPC-C++/third_party/upb/upb/base/string_view.h

@@ -0,0 +1,58 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+#ifndef UPB_BASE_STRING_VIEW_H_
+#define UPB_BASE_STRING_VIEW_H_
+
+#include <string.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#define UPB_STRINGVIEW_INIT(ptr, len) \
+  { ptr, len }
+
+#define UPB_STRINGVIEW_FORMAT "%.*s"
+#define UPB_STRINGVIEW_ARGS(view) (int)(view).size, (view).data
+
+// LINT.IfChange(struct_definition)
+typedef struct {
+  const char* data;
+  size_t size;
+} upb_StringView;
+// LINT.ThenChange(
+//  GoogleInternalName0,
+//  //depot/google3/third_party/upb/bits/golang/accessor.go:map_go_string
+// )
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_API_INLINE upb_StringView upb_StringView_FromDataAndSize(const char* data,
+                                                             size_t size) {
+  upb_StringView ret;
+  ret.data = data;
+  ret.size = size;
+  return ret;
+}
+
+UPB_INLINE upb_StringView upb_StringView_FromString(const char* data) {
+  return upb_StringView_FromDataAndSize(data, strlen(data));
+}
+
+UPB_INLINE bool upb_StringView_IsEqual(upb_StringView a, upb_StringView b) {
+  return a.size == b.size && memcmp(a.data, b.data, a.size) == 0;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_BASE_STRING_VIEW_H_ */

Pods/gRPC-C++/third_party/upb/upb/generated_code_support.h

@@ -0,0 +1,33 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_GENERATED_CODE_SUPPORT_H_
+#define UPB_GENERATED_CODE_SUPPORT_H_
+
+// IWYU pragma: begin_exports
+#include "upb/message/accessors.h"
+#include "upb/message/array.h"
+#include "upb/message/internal/accessors.h"
+#include "upb/message/internal/array.h"
+#include "upb/message/internal/extension.h"
+#include "upb/message/internal/message.h"
+#include "upb/message/map_gencode_util.h"
+#include "upb/message/message.h"
+#include "upb/mini_descriptor/decode.h"
+#include "upb/mini_table/enum.h"
+#include "upb/mini_table/extension.h"
+#include "upb/mini_table/extension_registry.h"
+#include "upb/mini_table/field.h"
+#include "upb/mini_table/file.h"
+#include "upb/mini_table/message.h"
+#include "upb/mini_table/sub.h"
+#include "upb/wire/decode.h"
+#include "upb/wire/decode_fast.h"
+#include "upb/wire/encode.h"
+// IWYU pragma: end_exports
+
+#endif  // UPB_GENERATED_CODE_SUPPORT_H_

Pods/gRPC-C++/third_party/upb/upb/hash/common.h

@@ -0,0 +1,174 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/*
+ * upb_table
+ *
+ * This header is INTERNAL-ONLY!  Its interfaces are not public or stable!
+ * This file defines very fast int->upb_value (inttable) and string->upb_value
+ * (strtable) hash tables.
+ *
+ * The table uses chained scatter with Brent's variation (inspired by the Lua
+ * implementation of hash tables).  The hash function for strings is Austin
+ * Appleby's "MurmurHash."
+ *
+ * The inttable uses uintptr_t as its key, which guarantees it can be used to
+ * store pointers or integers of at least 32 bits (upb isn't really useful on
+ * systems where sizeof(void*) < 4).
+ *
+ * The table must be homogeneous (all values of the same type).  In debug
+ * mode, we check this on insert and lookup.
+ */
+
+#ifndef UPB_HASH_COMMON_H_
+#define UPB_HASH_COMMON_H_
+
+#include <string.h>
+
+#include "upb/base/string_view.h"
+#include "upb/mem/arena.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* upb_value ******************************************************************/
+
+typedef struct {
+  uint64_t val;
+} upb_value;
+
+UPB_INLINE void _upb_value_setval(upb_value* v, uint64_t val) { v->val = val; }
+
+/* For each value ctype, define the following set of functions:
+ *
+ * // Get/set an int32 from a upb_value.
+ * int32_t upb_value_getint32(upb_value val);
+ * void upb_value_setint32(upb_value *val, int32_t cval);
+ *
+ * // Construct a new upb_value from an int32.
+ * upb_value upb_value_int32(int32_t val); */
+#define FUNCS(name, membername, type_t, converter)                   \
+  UPB_INLINE void upb_value_set##name(upb_value* val, type_t cval) { \
+    val->val = (converter)cval;                                      \
+  }                                                                  \
+  UPB_INLINE upb_value upb_value_##name(type_t val) {                \
+    upb_value ret;                                                   \
+    upb_value_set##name(&ret, val);                                  \
+    return ret;                                                      \
+  }                                                                  \
+  UPB_INLINE type_t upb_value_get##name(upb_value val) {             \
+    return (type_t)(converter)val.val;                               \
+  }
+
+FUNCS(int32, int32, int32_t, int32_t)
+FUNCS(int64, int64, int64_t, int64_t)
+FUNCS(uint32, uint32, uint32_t, uint32_t)
+FUNCS(uint64, uint64, uint64_t, uint64_t)
+FUNCS(bool, _bool, bool, bool)
+FUNCS(cstr, cstr, char*, uintptr_t)
+FUNCS(uintptr, uptr, uintptr_t, uintptr_t)
+FUNCS(ptr, ptr, void*, uintptr_t)
+FUNCS(constptr, constptr, const void*, uintptr_t)
+
+#undef FUNCS
+
+UPB_INLINE void upb_value_setfloat(upb_value* val, float cval) {
+  memcpy(&val->val, &cval, sizeof(cval));
+}
+
+UPB_INLINE void upb_value_setdouble(upb_value* val, double cval) {
+  memcpy(&val->val, &cval, sizeof(cval));
+}
+
+UPB_INLINE upb_value upb_value_float(float cval) {
+  upb_value ret;
+  upb_value_setfloat(&ret, cval);
+  return ret;
+}
+
+UPB_INLINE upb_value upb_value_double(double cval) {
+  upb_value ret;
+  upb_value_setdouble(&ret, cval);
+  return ret;
+}
+
+/* upb_tabkey *****************************************************************/
+
+/* Either:
+ *   1. an actual integer key, or
+ *   2. a pointer to a string prefixed by its uint32_t length, owned by us.
+ *
+ * ...depending on whether this is a string table or an int table.  We would
+ * make this a union of those two types, but C89 doesn't support statically
+ * initializing a non-first union member. */
+typedef uintptr_t upb_tabkey;
+
+UPB_INLINE char* upb_tabstr(upb_tabkey key, uint32_t* len) {
+  char* mem = (char*)key;
+  if (len) memcpy(len, mem, sizeof(*len));
+  return mem + sizeof(*len);
+}
+
+UPB_INLINE upb_StringView upb_tabstrview(upb_tabkey key) {
+  upb_StringView ret;
+  uint32_t len;
+  ret.data = upb_tabstr(key, &len);
+  ret.size = len;
+  return ret;
+}
+
+/* upb_tabval *****************************************************************/
+
+typedef struct upb_tabval {
+  uint64_t val;
+} upb_tabval;
+
+#define UPB_TABVALUE_EMPTY_INIT \
+  { -1 }
+
+/* upb_table ******************************************************************/
+
+typedef struct _upb_tabent {
+  upb_tabkey key;
+  upb_tabval val;
+
+  /* Internal chaining.  This is const so we can create static initializers for
+   * tables.  We cast away const sometimes, but *only* when the containing
+   * upb_table is known to be non-const.  This requires a bit of care, but
+   * the subtlety is confined to table.c. */
+  const struct _upb_tabent* next;
+} upb_tabent;
+
+typedef struct {
+  size_t count;       /* Number of entries in the hash part. */
+  uint32_t mask;      /* Mask to turn hash value -> bucket. */
+  uint32_t max_count; /* Max count before we hit our load limit. */
+  uint8_t size_lg2;   /* Size of the hashtable part is 2^size_lg2 entries. */
+  upb_tabent* entries;
+} upb_table;
+
+UPB_INLINE size_t upb_table_size(const upb_table* t) {
+  return t->size_lg2 ? 1 << t->size_lg2 : 0;
+}
+
+// Internal-only functions, in .h file only out of necessity.
+
+UPB_INLINE bool upb_tabent_isempty(const upb_tabent* e) { return e->key == 0; }
+
+uint32_t _upb_Hash(const void* p, size_t n, uint64_t seed);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_HASH_COMMON_H_ */

Pods/gRPC-C++/third_party/upb/upb/hash/int_table.h

@@ -0,0 +1,82 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_HASH_INT_TABLE_H_
+#define UPB_HASH_INT_TABLE_H_
+
+#include "upb/hash/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct {
+  upb_table t;              // For entries that don't fit in the array part.
+  const upb_tabval* array;  // Array part of the table. See const note above.
+  size_t array_size;        // Array part size.
+  size_t array_count;       // Array part number of elements.
+} upb_inttable;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Initialize a table. If memory allocation failed, false is returned and
+// the table is uninitialized.
+bool upb_inttable_init(upb_inttable* table, upb_Arena* a);
+
+// Returns the number of values in the table.
+size_t upb_inttable_count(const upb_inttable* t);
+
+// Inserts the given key into the hashtable with the given value.
+// The key must not already exist in the hash table.
+// The value must not be UINTPTR_MAX.
+//
+// If a table resize was required but memory allocation failed, false is
+// returned and the table is unchanged.
+bool upb_inttable_insert(upb_inttable* t, uintptr_t key, upb_value val,
+                         upb_Arena* a);
+
+// Looks up key in this table, returning "true" if the key was found.
+// If v is non-NULL, copies the value for this key into *v.
+bool upb_inttable_lookup(const upb_inttable* t, uintptr_t key, upb_value* v);
+
+// Removes an item from the table. Returns true if the remove was successful,
+// and stores the removed item in *val if non-NULL.
+bool upb_inttable_remove(upb_inttable* t, uintptr_t key, upb_value* val);
+
+// Updates an existing entry in an inttable.
+// If the entry does not exist, returns false and does nothing.
+// Unlike insert/remove, this does not invalidate iterators.
+bool upb_inttable_replace(upb_inttable* t, uintptr_t key, upb_value val);
+
+// Optimizes the table for the current set of entries, for both memory use and
+// lookup time. Client should call this after all entries have been inserted;
+// inserting more entries is legal, but will likely require a table resize.
+void upb_inttable_compact(upb_inttable* t, upb_Arena* a);
+
+// Iteration over inttable:
+//
+//   intptr_t iter = UPB_INTTABLE_BEGIN;
+//   uintptr_t key;
+//   upb_value val;
+//   while (upb_inttable_next(t, &key, &val, &iter)) {
+//      // ...
+//   }
+
+#define UPB_INTTABLE_BEGIN -1
+
+bool upb_inttable_next(const upb_inttable* t, uintptr_t* key, upb_value* val,
+                       intptr_t* iter);
+void upb_inttable_removeiter(upb_inttable* t, intptr_t* iter);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_HASH_INT_TABLE_H_ */

Pods/gRPC-C++/third_party/upb/upb/hash/str_table.h

@@ -0,0 +1,142 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_HASH_STR_TABLE_H_
+#define UPB_HASH_STR_TABLE_H_
+
+#include "upb/hash/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct {
+  upb_table t;
+} upb_strtable;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Initialize a table. If memory allocation failed, false is returned and
+// the table is uninitialized.
+bool upb_strtable_init(upb_strtable* table, size_t expected_size, upb_Arena* a);
+
+// Returns the number of values in the table.
+UPB_INLINE size_t upb_strtable_count(const upb_strtable* t) {
+  return t->t.count;
+}
+
+void upb_strtable_clear(upb_strtable* t);
+
+// Inserts the given key into the hashtable with the given value.
+// The key must not already exist in the hash table. The key is not required
+// to be NULL-terminated, and the table will make an internal copy of the key.
+//
+// If a table resize was required but memory allocation failed, false is
+// returned and the table is unchanged. */
+bool upb_strtable_insert(upb_strtable* t, const char* key, size_t len,
+                         upb_value val, upb_Arena* a);
+
+// Looks up key in this table, returning "true" if the key was found.
+// If v is non-NULL, copies the value for this key into *v.
+bool upb_strtable_lookup2(const upb_strtable* t, const char* key, size_t len,
+                          upb_value* v);
+
+// For NULL-terminated strings.
+UPB_INLINE bool upb_strtable_lookup(const upb_strtable* t, const char* key,
+                                    upb_value* v) {
+  return upb_strtable_lookup2(t, key, strlen(key), v);
+}
+
+// Removes an item from the table. Returns true if the remove was successful,
+// and stores the removed item in *val if non-NULL.
+bool upb_strtable_remove2(upb_strtable* t, const char* key, size_t len,
+                          upb_value* val);
+
+UPB_INLINE bool upb_strtable_remove(upb_strtable* t, const char* key,
+                                    upb_value* v) {
+  return upb_strtable_remove2(t, key, strlen(key), v);
+}
+
+// Exposed for testing only.
+bool upb_strtable_resize(upb_strtable* t, size_t size_lg2, upb_Arena* a);
+
+/* Iteration over strtable:
+ *
+ *   intptr_t iter = UPB_STRTABLE_BEGIN;
+ *   upb_StringView key;
+ *   upb_value val;
+ *   while (upb_strtable_next2(t, &key, &val, &iter)) {
+ *      // ...
+ *   }
+ */
+
+#define UPB_STRTABLE_BEGIN -1
+
+bool upb_strtable_next2(const upb_strtable* t, upb_StringView* key,
+                        upb_value* val, intptr_t* iter);
+void upb_strtable_removeiter(upb_strtable* t, intptr_t* iter);
+void upb_strtable_setentryvalue(upb_strtable* t, intptr_t iter, upb_value v);
+
+/* DEPRECATED iterators, slated for removal.
+ *
+ * Iterators for string tables.  We are subject to some kind of unusual
+ * design constraints:
+ *
+ * For high-level languages:
+ *  - we must be able to guarantee that we don't crash or corrupt memory even if
+ *    the program accesses an invalidated iterator.
+ *
+ * For C++11 range-based for:
+ *  - iterators must be copyable
+ *  - iterators must be comparable
+ *  - it must be possible to construct an "end" value.
+ *
+ * Iteration order is undefined.
+ *
+ * Modifying the table invalidates iterators.  upb_{str,int}table_done() is
+ * guaranteed to work even on an invalidated iterator, as long as the table it
+ * is iterating over has not been freed.  Calling next() or accessing data from
+ * an invalidated iterator yields unspecified elements from the table, but it is
+ * guaranteed not to crash and to return real table elements (except when done()
+ * is true). */
+/* upb_strtable_iter **********************************************************/
+
+/*   upb_strtable_iter i;
+ *   upb_strtable_begin(&i, t);
+ *   for(; !upb_strtable_done(&i); upb_strtable_next(&i)) {
+ *     const char *key = upb_strtable_iter_key(&i);
+ *     const upb_value val = upb_strtable_iter_value(&i);
+ *     // ...
+ *   }
+ */
+
+typedef struct {
+  const upb_strtable* t;
+  size_t index;
+} upb_strtable_iter;
+
+UPB_INLINE const upb_tabent* str_tabent(const upb_strtable_iter* i) {
+  return &i->t->t.entries[i->index];
+}
+
+void upb_strtable_begin(upb_strtable_iter* i, const upb_strtable* t);
+void upb_strtable_next(upb_strtable_iter* i);
+bool upb_strtable_done(const upb_strtable_iter* i);
+upb_StringView upb_strtable_iter_key(const upb_strtable_iter* i);
+upb_value upb_strtable_iter_value(const upb_strtable_iter* i);
+void upb_strtable_iter_setdone(upb_strtable_iter* i);
+bool upb_strtable_iter_isequal(const upb_strtable_iter* i1,
+                               const upb_strtable_iter* i2);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_HASH_STR_TABLE_H_ */

Pods/gRPC-C++/third_party/upb/upb/json/decode.h

@@ -0,0 +1,55 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_JSON_DECODE_H_
+#define UPB_JSON_DECODE_H_
+
+#include "upb/reflection/def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum { upb_JsonDecode_IgnoreUnknown = 1 };
+
+UPB_API bool upb_JsonDecode(const char* buf, size_t size, upb_Message* msg,
+                            const upb_MessageDef* m, const upb_DefPool* symtab,
+                            int options, upb_Arena* arena, upb_Status* status);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_JSONDECODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/json/encode.h

@@ -0,0 +1,73 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_JSON_ENCODE_H_
+#define UPB_JSON_ENCODE_H_
+
+#include "upb/reflection/def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+  /* When set, emits 0/default values.  TODO: proto3 only? */
+  upb_JsonEncode_EmitDefaults = 1 << 0,
+
+  /* When set, use normal (snake_case) field names instead of JSON (camelCase)
+     names. */
+  upb_JsonEncode_UseProtoNames = 1 << 1,
+
+  /* When set, emits enums as their integer values instead of as their names. */
+  upb_JsonEncode_FormatEnumsAsIntegers = 1 << 2
+};
+
+/* Encodes the given |msg| to JSON format.  The message's reflection is given in
+ * |m|.  The DefPool in |ext_pool| is used to find extensions (if NULL,
+ * extensions will not be printed).
+ *
+ * Output is placed in the given buffer, and always NULL-terminated.  The output
+ * size (excluding NULL) is returned.  This means that a return value >= |size|
+ * implies that the output was truncated.  (These are the same semantics as
+ * snprintf()). */
+UPB_API size_t upb_JsonEncode(const upb_Message* msg, const upb_MessageDef* m,
+                              const upb_DefPool* ext_pool, int options,
+                              char* buf, size_t size, upb_Status* status);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_JSONENCODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/lex/atoi.h

@@ -0,0 +1,35 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_LEX_ATOI_H_
+#define UPB_LEX_ATOI_H_
+
+#include <stdint.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// We use these hand-written routines instead of strto[u]l() because the "long
+// long" variants aren't in c89. Also our version allows setting a ptr limit.
+// Return the new position of the pointer after parsing the int, or NULL on
+// integer overflow.
+
+const char* upb_BufToUint64(const char* ptr, const char* end, uint64_t* val);
+const char* upb_BufToInt64(const char* ptr, const char* end, int64_t* val,
+                           bool* is_neg);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_LEX_ATOI_H_ */

Pods/gRPC-C++/third_party/upb/upb/lex/round_trip.h

@@ -0,0 +1,35 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_LEX_ROUND_TRIP_H_
+#define UPB_LEX_ROUND_TRIP_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// Encodes a float or double that is round-trippable, but as short as possible.
+// These routines are not fully optimal (not guaranteed to be shortest), but are
+// short-ish and match the implementation that has been used in protobuf since
+// the beginning.
+
+// The given buffer size must be at least kUpb_RoundTripBufferSize.
+enum { kUpb_RoundTripBufferSize = 32 };
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size);
+void _upb_EncodeRoundTripFloat(float val, char* buf, size_t size);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_LEX_ROUND_TRIP_H_ */

Pods/gRPC-C++/third_party/upb/upb/lex/strtod.h

@@ -0,0 +1,26 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_LEX_STRTOD_H_
+#define UPB_LEX_STRTOD_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+double _upb_NoLocaleStrtod(const char *str, char **endptr);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_LEX_STRTOD_H_ */

Pods/gRPC-C++/third_party/upb/upb/lex/unicode.h

@@ -0,0 +1,59 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_LEX_UNICODE_H_
+#define UPB_LEX_UNICODE_H_
+
+#include <stdint.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Returns true iff a codepoint is the value for a high surrogate.
+UPB_INLINE bool upb_Unicode_IsHigh(uint32_t cp) {
+  return (cp >= 0xd800 && cp <= 0xdbff);
+}
+
+// Returns true iff a codepoint is the value for a low surrogate.
+UPB_INLINE bool upb_Unicode_IsLow(uint32_t cp) {
+  return (cp >= 0xdc00 && cp <= 0xdfff);
+}
+
+// Returns the high 16-bit surrogate value for a supplementary codepoint.
+// Does not sanity-check the input.
+UPB_INLINE uint16_t upb_Unicode_ToHigh(uint32_t cp) {
+  return (cp >> 10) + 0xd7c0;
+}
+
+// Returns the low 16-bit surrogate value for a supplementary codepoint.
+// Does not sanity-check the input.
+UPB_INLINE uint16_t upb_Unicode_ToLow(uint32_t cp) {
+  return (cp & 0x3ff) | 0xdc00;
+}
+
+// Returns the 32-bit value corresponding to a pair of 16-bit surrogates.
+// Does not sanity-check the input.
+UPB_INLINE uint32_t upb_Unicode_FromPair(uint32_t high, uint32_t low) {
+  return ((high & 0x3ff) << 10) + (low & 0x3ff) + 0x10000;
+}
+
+// Outputs a codepoint as UTF8.
+// Returns the number of bytes written (1-4 on success, 0 on error).
+// Does not sanity-check the input. Specifically does not check for surrogates.
+int upb_Unicode_ToUTF8(uint32_t cp, char* out);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_LEX_UNICODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mem/alloc.h

@@ -0,0 +1,78 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MEM_ALLOC_H_
+#define UPB_MEM_ALLOC_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct upb_alloc upb_alloc;
+
+/* A combined `malloc()`/`free()` function.
+ * If `size` is 0 then the function acts like `free()`, otherwise it acts like
+ * `realloc()`.  Only `oldsize` bytes from a previous allocation are
+ * preserved. */
+typedef void* upb_alloc_func(upb_alloc* alloc, void* ptr, size_t oldsize,
+                             size_t size);
+
+/* A upb_alloc is a possibly-stateful allocator object.
+ *
+ * It could either be an arena allocator (which doesn't require individual
+ * `free()` calls) or a regular `malloc()` (which does).  The client must
+ * therefore free memory unless it knows that the allocator is an arena
+ * allocator. */
+struct upb_alloc {
+  upb_alloc_func* func;
+};
+
+UPB_INLINE void* upb_malloc(upb_alloc* alloc, size_t size) {
+  UPB_ASSERT(alloc);
+  return alloc->func(alloc, NULL, 0, size);
+}
+
+UPB_INLINE void* upb_realloc(upb_alloc* alloc, void* ptr, size_t oldsize,
+                             size_t size) {
+  UPB_ASSERT(alloc);
+  return alloc->func(alloc, ptr, oldsize, size);
+}
+
+UPB_INLINE void upb_free(upb_alloc* alloc, void* ptr) {
+  UPB_ASSERT(alloc);
+  alloc->func(alloc, ptr, 0, 0);
+}
+
+// The global allocator used by upb. Uses the standard malloc()/free().
+
+extern upb_alloc upb_alloc_global;
+
+/* Functions that hard-code the global malloc.
+ *
+ * We still get benefit because we can put custom logic into our global
+ * allocator, like injecting out-of-memory faults in debug/testing builds. */
+
+UPB_INLINE void* upb_gmalloc(size_t size) {
+  return upb_malloc(&upb_alloc_global, size);
+}
+
+UPB_INLINE void* upb_grealloc(void* ptr, size_t oldsize, size_t size) {
+  return upb_realloc(&upb_alloc_global, ptr, oldsize, size);
+}
+
+UPB_INLINE void upb_gfree(void* ptr) { upb_free(&upb_alloc_global, ptr); }
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MEM_ALLOC_H_ */

Pods/gRPC-C++/third_party/upb/upb/mem/arena.h

@@ -0,0 +1,132 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/* upb_Arena is a specific allocator implementation that uses arena allocation.
+ * The user provides an allocator that will be used to allocate the underlying
+ * arena blocks.  Arenas by nature do not require the individual allocations
+ * to be freed.  However the Arena does allow users to register cleanup
+ * functions that will run when the arena is destroyed.
+ *
+ * A upb_Arena is *not* thread-safe.
+ *
+ * You could write a thread-safe arena allocator that satisfies the
+ * upb_alloc interface, but it would not be as efficient for the
+ * single-threaded case. */
+
+#ifndef UPB_MEM_ARENA_H_
+#define UPB_MEM_ARENA_H_
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "upb/mem/alloc.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct upb_Arena upb_Arena;
+
+typedef struct {
+  char *ptr, *end;
+} _upb_ArenaHead;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Creates an arena from the given initial block (if any -- n may be 0).
+// Additional blocks will be allocated from |alloc|.  If |alloc| is NULL, this
+// is a fixed-size arena and cannot grow.
+UPB_API upb_Arena* upb_Arena_Init(void* mem, size_t n, upb_alloc* alloc);
+
+UPB_API void upb_Arena_Free(upb_Arena* a);
+UPB_API bool upb_Arena_Fuse(upb_Arena* a, upb_Arena* b);
+
+void upb_Arena_IncRefFor(upb_Arena* arena, const void* owner);
+void upb_Arena_DecRefFor(upb_Arena* arena, const void* owner);
+
+void* _upb_Arena_SlowMalloc(upb_Arena* a, size_t size);
+size_t upb_Arena_SpaceAllocated(upb_Arena* arena);
+uint32_t upb_Arena_DebugRefCount(upb_Arena* arena);
+
+UPB_INLINE size_t _upb_ArenaHas(upb_Arena* a) {
+  _upb_ArenaHead* h = (_upb_ArenaHead*)a;
+  return (size_t)(h->end - h->ptr);
+}
+
+UPB_API_INLINE void* upb_Arena_Malloc(upb_Arena* a, size_t size) {
+  size = UPB_ALIGN_MALLOC(size);
+  size_t span = size + UPB_ASAN_GUARD_SIZE;
+  if (UPB_UNLIKELY(_upb_ArenaHas(a) < span)) {
+    return _upb_Arena_SlowMalloc(a, size);
+  }
+
+  // We have enough space to do a fast malloc.
+  _upb_ArenaHead* h = (_upb_ArenaHead*)a;
+  void* ret = h->ptr;
+  UPB_ASSERT(UPB_ALIGN_MALLOC((uintptr_t)ret) == (uintptr_t)ret);
+  UPB_ASSERT(UPB_ALIGN_MALLOC(size) == size);
+  UPB_UNPOISON_MEMORY_REGION(ret, size);
+
+  h->ptr += span;
+
+  return ret;
+}
+
+// Shrinks the last alloc from arena.
+// REQUIRES: (ptr, oldsize) was the last malloc/realloc from this arena.
+// We could also add a upb_Arena_TryShrinkLast() which is simply a no-op if
+// this was not the last alloc.
+UPB_API_INLINE void upb_Arena_ShrinkLast(upb_Arena* a, void* ptr,
+                                         size_t oldsize, size_t size) {
+  _upb_ArenaHead* h = (_upb_ArenaHead*)a;
+  oldsize = UPB_ALIGN_MALLOC(oldsize);
+  size = UPB_ALIGN_MALLOC(size);
+  // Must be the last alloc.
+  UPB_ASSERT((char*)ptr + oldsize == h->ptr - UPB_ASAN_GUARD_SIZE);
+  UPB_ASSERT(size <= oldsize);
+  h->ptr = (char*)ptr + size;
+}
+
+UPB_API_INLINE void* upb_Arena_Realloc(upb_Arena* a, void* ptr, size_t oldsize,
+                                       size_t size) {
+  _upb_ArenaHead* h = (_upb_ArenaHead*)a;
+  oldsize = UPB_ALIGN_MALLOC(oldsize);
+  size = UPB_ALIGN_MALLOC(size);
+  bool is_most_recent_alloc = (uintptr_t)ptr + oldsize == (uintptr_t)h->ptr;
+
+  if (is_most_recent_alloc) {
+    ptrdiff_t diff = size - oldsize;
+    if ((ptrdiff_t)_upb_ArenaHas(a) >= diff) {
+      h->ptr += diff;
+      return ptr;
+    }
+  } else if (size <= oldsize) {
+    return ptr;
+  }
+
+  void* ret = upb_Arena_Malloc(a, size);
+
+  if (ret && oldsize > 0) {
+    memcpy(ret, ptr, UPB_MIN(oldsize, size));
+  }
+
+  return ret;
+}
+
+UPB_API_INLINE upb_Arena* upb_Arena_New(void) {
+  return upb_Arena_Init(NULL, 0, &upb_alloc_global);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MEM_ARENA_H_ */

Pods/gRPC-C++/third_party/upb/upb/mem/arena.hpp

@@ -0,0 +1,54 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MEM_ARENA_HPP_
+#define UPB_MEM_ARENA_HPP_
+
+#include <memory>
+
+#include "upb/mem/arena.h"
+
+namespace upb {
+
+class Arena {
+ public:
+  // A simple arena with no initial memory block and the default allocator.
+  Arena() : ptr_(upb_Arena_New(), upb_Arena_Free) {}
+  Arena(char* initial_block, size_t size)
+      : ptr_(upb_Arena_Init(initial_block, size, &upb_alloc_global),
+             upb_Arena_Free) {}
+
+  upb_Arena* ptr() const { return ptr_.get(); }
+
+  void Fuse(Arena& other) { upb_Arena_Fuse(ptr(), other.ptr()); }
+
+ protected:
+  std::unique_ptr<upb_Arena, decltype(&upb_Arena_Free)> ptr_;
+};
+
+// InlinedArena seeds the arenas with a predefined amount of memory.  No
+// heap memory will be allocated until the initial block is exceeded.
+template <int N>
+class InlinedArena : public Arena {
+ public:
+  InlinedArena() : Arena(initial_block_, N) {}
+  ~InlinedArena() {
+    // Explicitly destroy the arena now so that it does not outlive
+    // initial_block_.
+    ptr_.reset();
+  }
+
+ private:
+  InlinedArena(const InlinedArena*) = delete;
+  InlinedArena& operator=(const InlinedArena*) = delete;
+
+  char initial_block_[N];
+};
+
+}  // namespace upb
+
+#endif  // UPB_MEM_ARENA_HPP_

Pods/gRPC-C++/third_party/upb/upb/mem/internal/arena.h

@@ -0,0 +1,94 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MEM_INTERNAL_ARENA_H_
+#define UPB_MEM_INTERNAL_ARENA_H_
+
+#include "upb/mem/arena.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct _upb_MemBlock _upb_MemBlock;
+
+struct upb_Arena {
+  _upb_ArenaHead head;
+
+  // upb_alloc* together with a low bit which signals if there is an initial
+  // block.
+  uintptr_t block_alloc;
+
+  // When multiple arenas are fused together, each arena points to a parent
+  // arena (root points to itself). The root tracks how many live arenas
+  // reference it.
+
+  // The low bit is tagged:
+  //   0: pointer to parent
+  //   1: count, left shifted by one
+  UPB_ATOMIC(uintptr_t) parent_or_count;
+
+  // All nodes that are fused together are in a singly-linked list.
+  UPB_ATOMIC(upb_Arena*) next;  // NULL at end of list.
+
+  // The last element of the linked list.  This is present only as an
+  // optimization, so that we do not have to iterate over all members for every
+  // fuse.  Only significant for an arena root.  In other cases it is ignored.
+  UPB_ATOMIC(upb_Arena*) tail;  // == self when no other list members.
+
+  // Linked list of blocks to free/cleanup.  Atomic only for the benefit of
+  // upb_Arena_SpaceAllocated().
+  UPB_ATOMIC(_upb_MemBlock*) blocks;
+};
+
+UPB_INLINE bool _upb_Arena_IsTaggedRefcount(uintptr_t parent_or_count) {
+  return (parent_or_count & 1) == 1;
+}
+
+UPB_INLINE bool _upb_Arena_IsTaggedPointer(uintptr_t parent_or_count) {
+  return (parent_or_count & 1) == 0;
+}
+
+UPB_INLINE uintptr_t _upb_Arena_RefCountFromTagged(uintptr_t parent_or_count) {
+  UPB_ASSERT(_upb_Arena_IsTaggedRefcount(parent_or_count));
+  return parent_or_count >> 1;
+}
+
+UPB_INLINE uintptr_t _upb_Arena_TaggedFromRefcount(uintptr_t refcount) {
+  uintptr_t parent_or_count = (refcount << 1) | 1;
+  UPB_ASSERT(_upb_Arena_IsTaggedRefcount(parent_or_count));
+  return parent_or_count;
+}
+
+UPB_INLINE upb_Arena* _upb_Arena_PointerFromTagged(uintptr_t parent_or_count) {
+  UPB_ASSERT(_upb_Arena_IsTaggedPointer(parent_or_count));
+  return (upb_Arena*)parent_or_count;
+}
+
+UPB_INLINE uintptr_t _upb_Arena_TaggedFromPointer(upb_Arena* a) {
+  uintptr_t parent_or_count = (uintptr_t)a;
+  UPB_ASSERT(_upb_Arena_IsTaggedPointer(parent_or_count));
+  return parent_or_count;
+}
+
+UPB_INLINE upb_alloc* upb_Arena_BlockAlloc(upb_Arena* arena) {
+  return (upb_alloc*)(arena->block_alloc & ~0x1);
+}
+
+UPB_INLINE uintptr_t upb_Arena_MakeBlockAlloc(upb_alloc* alloc,
+                                              bool has_initial) {
+  uintptr_t alloc_uint = (uintptr_t)alloc;
+  UPB_ASSERT((alloc_uint & 1) == 0);
+  return alloc_uint | (has_initial ? 1 : 0);
+}
+
+UPB_INLINE bool upb_Arena_HasInitialBlock(upb_Arena* arena) {
+  return arena->block_alloc & 0x1;
+}
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MEM_INTERNAL_ARENA_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/accessors.h

@@ -0,0 +1,380 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MESSAGE_ACCESSORS_H_
+#define UPB_MESSAGE_ACCESSORS_H_
+
+#include "upb/base/descriptor_constants.h"
+#include "upb/message/array.h"
+#include "upb/message/internal/accessors.h"
+#include "upb/message/internal/array.h"
+#include "upb/message/internal/map.h"
+#include "upb/message/internal/message.h"
+#include "upb/message/map.h"
+#include "upb/mini_table/enum.h"
+#include "upb/mini_table/field.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_API_INLINE void upb_Message_ClearField(upb_Message* msg,
+                                           const upb_MiniTableField* field) {
+  if (upb_MiniTableField_IsExtension(field)) {
+    const upb_MiniTableExtension* ext = (const upb_MiniTableExtension*)field;
+    _upb_Message_ClearExtensionField(msg, ext);
+  } else {
+    _upb_Message_ClearNonExtensionField(msg, field);
+  }
+}
+
+UPB_API_INLINE void upb_Message_Clear(upb_Message* msg,
+                                      const upb_MiniTable* l) {
+  // Note: Can't use UPB_PTR_AT() here because we are doing pointer subtraction.
+  char* mem = (char*)msg - sizeof(upb_Message_Internal);
+  memset(mem, 0, upb_msg_sizeof(l));
+}
+
+UPB_API_INLINE bool upb_Message_HasField(const upb_Message* msg,
+                                         const upb_MiniTableField* field) {
+  if (upb_MiniTableField_IsExtension(field)) {
+    const upb_MiniTableExtension* ext = (const upb_MiniTableExtension*)field;
+    return _upb_Message_HasExtensionField(msg, ext);
+  } else {
+    return _upb_Message_HasNonExtensionField(msg, field);
+  }
+}
+
+UPB_API_INLINE uint32_t upb_Message_WhichOneofFieldNumber(
+    const upb_Message* message, const upb_MiniTableField* oneof_field) {
+  UPB_ASSUME(_upb_MiniTableField_InOneOf(oneof_field));
+  return _upb_getoneofcase_field(message, oneof_field);
+}
+
+UPB_API_INLINE bool upb_Message_GetBool(const upb_Message* msg,
+                                        const upb_MiniTableField* field,
+                                        bool default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Bool);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_1Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  bool ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetBool(upb_Message* msg,
+                                        const upb_MiniTableField* field,
+                                        bool value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Bool);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_1Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE int32_t upb_Message_GetInt32(const upb_Message* msg,
+                                            const upb_MiniTableField* field,
+                                            int32_t default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Int32 ||
+             upb_MiniTableField_CType(field) == kUpb_CType_Enum);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  int32_t ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetInt32(upb_Message* msg,
+                                         const upb_MiniTableField* field,
+                                         int32_t value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Int32 ||
+             upb_MiniTableField_CType(field) == kUpb_CType_Enum);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE uint32_t upb_Message_GetUInt32(const upb_Message* msg,
+                                              const upb_MiniTableField* field,
+                                              uint32_t default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_UInt32);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  uint32_t ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetUInt32(upb_Message* msg,
+                                          const upb_MiniTableField* field,
+                                          uint32_t value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_UInt32);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE void upb_Message_SetClosedEnum(
+    upb_Message* msg, const upb_MiniTable* msg_mini_table,
+    const upb_MiniTableField* field, int32_t value) {
+  UPB_ASSERT(upb_MiniTableField_IsClosedEnum(field));
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  UPB_ASSERT(upb_MiniTableEnum_CheckValue(
+      upb_MiniTable_GetSubEnumTable(msg_mini_table, field), value));
+  _upb_Message_SetNonExtensionField(msg, field, &value);
+}
+
+UPB_API_INLINE int64_t upb_Message_GetInt64(const upb_Message* msg,
+                                            const upb_MiniTableField* field,
+                                            uint64_t default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Int64);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  int64_t ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetInt64(upb_Message* msg,
+                                         const upb_MiniTableField* field,
+                                         int64_t value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Int64);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE uint64_t upb_Message_GetUInt64(const upb_Message* msg,
+                                              const upb_MiniTableField* field,
+                                              uint64_t default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_UInt64);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  uint64_t ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetUInt64(upb_Message* msg,
+                                          const upb_MiniTableField* field,
+                                          uint64_t value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_UInt64);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE float upb_Message_GetFloat(const upb_Message* msg,
+                                          const upb_MiniTableField* field,
+                                          float default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Float);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  float ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetFloat(upb_Message* msg,
+                                         const upb_MiniTableField* field,
+                                         float value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Float);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_4Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE double upb_Message_GetDouble(const upb_Message* msg,
+                                            const upb_MiniTableField* field,
+                                            double default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Double);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  double ret;
+  _upb_Message_GetField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetDouble(upb_Message* msg,
+                                          const upb_MiniTableField* field,
+                                          double value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Double);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_8Byte);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE upb_StringView
+upb_Message_GetString(const upb_Message* msg, const upb_MiniTableField* field,
+                      upb_StringView def_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_String ||
+             upb_MiniTableField_CType(field) == kUpb_CType_Bytes);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_StringView);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  upb_StringView ret;
+  _upb_Message_GetField(msg, field, &def_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE bool upb_Message_SetString(upb_Message* msg,
+                                          const upb_MiniTableField* field,
+                                          upb_StringView value, upb_Arena* a) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_String ||
+             upb_MiniTableField_CType(field) == kUpb_CType_Bytes);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_StringView);
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  return _upb_Message_SetField(msg, field, &value, a);
+}
+
+UPB_API_INLINE upb_TaggedMessagePtr upb_Message_GetTaggedMessagePtr(
+    const upb_Message* msg, const upb_MiniTableField* field,
+    upb_Message* default_val) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Message);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) ==
+             UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte));
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  upb_TaggedMessagePtr tagged;
+  _upb_Message_GetNonExtensionField(msg, field, &default_val, &tagged);
+  return tagged;
+}
+
+UPB_API_INLINE const upb_Message* upb_Message_GetMessage(
+    const upb_Message* msg, const upb_MiniTableField* field,
+    upb_Message* default_val) {
+  upb_TaggedMessagePtr tagged =
+      upb_Message_GetTaggedMessagePtr(msg, field, default_val);
+  return upb_TaggedMessagePtr_GetNonEmptyMessage(tagged);
+}
+
+// For internal use only; users cannot set tagged messages because only the
+// parser and the message copier are allowed to directly create an empty
+// message.
+UPB_API_INLINE void _upb_Message_SetTaggedMessagePtr(
+    upb_Message* msg, const upb_MiniTable* mini_table,
+    const upb_MiniTableField* field, upb_TaggedMessagePtr sub_message) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Message);
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) ==
+             UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte));
+  UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+  UPB_ASSERT(mini_table->subs[field->UPB_PRIVATE(submsg_index)].submsg);
+  _upb_Message_SetNonExtensionField(msg, field, &sub_message);
+}
+
+UPB_API_INLINE void upb_Message_SetMessage(upb_Message* msg,
+                                           const upb_MiniTable* mini_table,
+                                           const upb_MiniTableField* field,
+                                           upb_Message* sub_message) {
+  _upb_Message_SetTaggedMessagePtr(
+      msg, mini_table, field, _upb_TaggedMessagePtr_Pack(sub_message, false));
+}
+
+UPB_API_INLINE upb_Message* upb_Message_GetOrCreateMutableMessage(
+    upb_Message* msg, const upb_MiniTable* mini_table,
+    const upb_MiniTableField* field, upb_Arena* arena) {
+  UPB_ASSERT(arena);
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Message);
+  upb_Message* sub_message = *UPB_PTR_AT(msg, field->offset, upb_Message*);
+  if (!sub_message) {
+    const upb_MiniTable* sub_mini_table =
+        mini_table->subs[field->UPB_PRIVATE(submsg_index)].submsg;
+    UPB_ASSERT(sub_mini_table);
+    sub_message = _upb_Message_New(sub_mini_table, arena);
+    *UPB_PTR_AT(msg, field->offset, upb_Message*) = sub_message;
+    _upb_Message_SetPresence(msg, field);
+  }
+  return sub_message;
+}
+
+UPB_API_INLINE const upb_Array* upb_Message_GetArray(
+    const upb_Message* msg, const upb_MiniTableField* field) {
+  _upb_MiniTableField_CheckIsArray(field);
+  upb_Array* ret;
+  const upb_Array* default_val = NULL;
+  _upb_Message_GetNonExtensionField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE upb_Array* upb_Message_GetMutableArray(
+    upb_Message* msg, const upb_MiniTableField* field) {
+  _upb_MiniTableField_CheckIsArray(field);
+  return (upb_Array*)upb_Message_GetArray(msg, field);
+}
+
+UPB_API_INLINE upb_Array* upb_Message_GetOrCreateMutableArray(
+    upb_Message* msg, const upb_MiniTableField* field, upb_Arena* arena) {
+  UPB_ASSERT(arena);
+  _upb_MiniTableField_CheckIsArray(field);
+  upb_Array* array = upb_Message_GetMutableArray(msg, field);
+  if (!array) {
+    array = _upb_Array_New(arena, 4, _upb_MiniTable_ElementSizeLg2(field));
+    // Check again due to: https://godbolt.org/z/7WfaoKG1r
+    _upb_MiniTableField_CheckIsArray(field);
+    _upb_Message_SetField(msg, field, &array, arena);
+  }
+  return array;
+}
+
+UPB_API_INLINE void* upb_Message_ResizeArrayUninitialized(
+    upb_Message* msg, const upb_MiniTableField* field, size_t size,
+    upb_Arena* arena) {
+  _upb_MiniTableField_CheckIsArray(field);
+  upb_Array* arr = upb_Message_GetOrCreateMutableArray(msg, field, arena);
+  if (!arr || !_upb_Array_ResizeUninitialized(arr, size, arena)) return NULL;
+  return _upb_array_ptr(arr);
+}
+
+UPB_API_INLINE const upb_Map* upb_Message_GetMap(
+    const upb_Message* msg, const upb_MiniTableField* field) {
+  _upb_MiniTableField_CheckIsMap(field);
+  _upb_Message_AssertMapIsUntagged(msg, field);
+  upb_Map* ret;
+  const upb_Map* default_val = NULL;
+  _upb_Message_GetNonExtensionField(msg, field, &default_val, &ret);
+  return ret;
+}
+
+UPB_API_INLINE upb_Map* upb_Message_GetMutableMap(
+    upb_Message* msg, const upb_MiniTableField* field) {
+  return (upb_Map*)upb_Message_GetMap(msg, field);
+}
+
+UPB_API_INLINE upb_Map* upb_Message_GetOrCreateMutableMap(
+    upb_Message* msg, const upb_MiniTable* map_entry_mini_table,
+    const upb_MiniTableField* field, upb_Arena* arena) {
+  UPB_ASSUME(upb_MiniTableField_CType(field) == kUpb_CType_Message);
+  const upb_MiniTableField* map_entry_key_field =
+      &map_entry_mini_table->fields[0];
+  const upb_MiniTableField* map_entry_value_field =
+      &map_entry_mini_table->fields[1];
+  return _upb_Message_GetOrCreateMutableMap(
+      msg, field,
+      _upb_Map_CTypeSize(upb_MiniTableField_CType(map_entry_key_field)),
+      _upb_Map_CTypeSize(upb_MiniTableField_CType(map_entry_value_field)),
+      arena);
+}
+
+// Updates a map entry given an entry message.
+upb_MapInsertStatus upb_Message_InsertMapEntry(upb_Map* map,
+                                               const upb_MiniTable* mini_table,
+                                               const upb_MiniTableField* field,
+                                               upb_Message* map_entry_message,
+                                               upb_Arena* arena);
+
+// Compares two messages by serializing them and calling memcmp().
+bool upb_Message_IsExactlyEqual(const upb_Message* m1, const upb_Message* m2,
+                                const upb_MiniTable* layout);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MESSAGE_ACCESSORS_H_

Pods/gRPC-C++/third_party/upb/upb/message/array.h

@@ -0,0 +1,98 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_MESSAGE_ARRAY_H_
+#define UPB_MESSAGE_ARRAY_H_
+
+#include <stddef.h>
+
+#include "upb/base/descriptor_constants.h"
+#include "upb/mem/arena.h"
+#include "upb/message/value.h"  // IWYU pragma: export
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct upb_Array upb_Array;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Creates a new array on the given arena that holds elements of this type.
+UPB_API upb_Array* upb_Array_New(upb_Arena* a, upb_CType type);
+
+// Returns the number of elements in the array.
+UPB_API size_t upb_Array_Size(const upb_Array* arr);
+
+// Returns the given element, which must be within the array's current size.
+UPB_API upb_MessageValue upb_Array_Get(const upb_Array* arr, size_t i);
+
+// Sets the given element, which must be within the array's current size.
+UPB_API void upb_Array_Set(upb_Array* arr, size_t i, upb_MessageValue val);
+
+// Appends an element to the array. Returns false on allocation failure.
+UPB_API bool upb_Array_Append(upb_Array* array, upb_MessageValue val,
+                              upb_Arena* arena);
+
+// Moves elements within the array using memmove().
+// Like memmove(), the source and destination elements may be overlapping.
+UPB_API void upb_Array_Move(upb_Array* array, size_t dst_idx, size_t src_idx,
+                            size_t count);
+
+// Inserts one or more empty elements into the array.
+// Existing elements are shifted right.
+// The new elements have undefined state and must be set with `upb_Array_Set()`.
+// REQUIRES: `i <= upb_Array_Size(arr)`
+UPB_API bool upb_Array_Insert(upb_Array* array, size_t i, size_t count,
+                              upb_Arena* arena);
+
+// Deletes one or more elements from the array.
+// Existing elements are shifted left.
+// REQUIRES: `i + count <= upb_Array_Size(arr)`
+UPB_API void upb_Array_Delete(upb_Array* array, size_t i, size_t count);
+
+// Changes the size of a vector. New elements are initialized to NULL/0.
+// Returns false on allocation failure.
+UPB_API bool upb_Array_Resize(upb_Array* array, size_t size, upb_Arena* arena);
+
+// Returns pointer to array data.
+UPB_API const void* upb_Array_DataPtr(const upb_Array* arr);
+
+// Returns mutable pointer to array data.
+UPB_API void* upb_Array_MutableDataPtr(upb_Array* arr);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_ARRAY_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/accessors.h

@@ -0,0 +1,367 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MESSAGE_INTERNAL_ACCESSORS_H_
+#define UPB_MESSAGE_INTERNAL_ACCESSORS_H_
+
+#include "upb/message/internal/extension.h"
+#include "upb/message/internal/map.h"
+#include "upb/message/internal/message.h"
+#include "upb/mini_table/internal/field.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#if defined(__GNUC__) && !defined(__clang__)
+// GCC raises incorrect warnings in these functions.  It thinks that we are
+// overrunning buffers, but we carefully write the functions in this file to
+// guarantee that this is impossible.  GCC gets this wrong due it its failure
+// to perform constant propagation as we expect:
+//   - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108217
+//   - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108226
+//
+// Unfortunately this also indicates that GCC is not optimizing away the
+// switch() in cases where it should be, compromising the performance.
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#if __GNUC__ >= 11
+#pragma GCC diagnostic ignored "-Wstringop-overread"
+#endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// LINT.IfChange(presence_logic)
+
+// Hasbit access ///////////////////////////////////////////////////////////////
+
+UPB_INLINE size_t _upb_hasbit_ofs(size_t idx) { return idx / 8; }
+
+UPB_INLINE char _upb_hasbit_mask(size_t idx) { return 1 << (idx % 8); }
+
+UPB_INLINE bool _upb_hasbit(const upb_Message* msg, size_t idx) {
+  return (*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), const char) &
+          _upb_hasbit_mask(idx)) != 0;
+}
+
+UPB_INLINE void _upb_sethas(const upb_Message* msg, size_t idx) {
+  (*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) |= _upb_hasbit_mask(idx);
+}
+
+UPB_INLINE void _upb_clearhas(const upb_Message* msg, size_t idx) {
+  (*UPB_PTR_AT(msg, _upb_hasbit_ofs(idx), char)) &= ~_upb_hasbit_mask(idx);
+}
+
+UPB_INLINE size_t _upb_Message_Hasidx(const upb_MiniTableField* f) {
+  UPB_ASSERT(f->presence > 0);
+  return f->presence;
+}
+
+UPB_INLINE bool _upb_hasbit_field(const upb_Message* msg,
+                                  const upb_MiniTableField* f) {
+  return _upb_hasbit(msg, _upb_Message_Hasidx(f));
+}
+
+UPB_INLINE void _upb_sethas_field(const upb_Message* msg,
+                                  const upb_MiniTableField* f) {
+  _upb_sethas(msg, _upb_Message_Hasidx(f));
+}
+
+// Oneof case access ///////////////////////////////////////////////////////////
+
+UPB_INLINE size_t _upb_oneofcase_ofs(const upb_MiniTableField* f) {
+  UPB_ASSERT(f->presence < 0);
+  return ~(ptrdiff_t)f->presence;
+}
+
+UPB_INLINE uint32_t* _upb_oneofcase_field(upb_Message* msg,
+                                          const upb_MiniTableField* f) {
+  return UPB_PTR_AT(msg, _upb_oneofcase_ofs(f), uint32_t);
+}
+
+UPB_INLINE uint32_t _upb_getoneofcase_field(const upb_Message* msg,
+                                            const upb_MiniTableField* f) {
+  return *_upb_oneofcase_field((upb_Message*)msg, f);
+}
+
+// LINT.ThenChange(GoogleInternalName2)
+
+UPB_INLINE bool _upb_MiniTableField_InOneOf(const upb_MiniTableField* field) {
+  return field->presence < 0;
+}
+
+UPB_INLINE void* _upb_MiniTableField_GetPtr(upb_Message* msg,
+                                            const upb_MiniTableField* field) {
+  return (char*)msg + field->offset;
+}
+
+UPB_INLINE const void* _upb_MiniTableField_GetConstPtr(
+    const upb_Message* msg, const upb_MiniTableField* field) {
+  return (char*)msg + field->offset;
+}
+
+UPB_INLINE void _upb_Message_SetPresence(upb_Message* msg,
+                                         const upb_MiniTableField* field) {
+  if (field->presence > 0) {
+    _upb_sethas_field(msg, field);
+  } else if (_upb_MiniTableField_InOneOf(field)) {
+    *_upb_oneofcase_field(msg, field) = field->number;
+  }
+}
+
+UPB_INLINE bool _upb_MiniTable_ValueIsNonZero(const void* default_val,
+                                              const upb_MiniTableField* field) {
+  char zero[16] = {0};
+  switch (_upb_MiniTableField_GetRep(field)) {
+    case kUpb_FieldRep_1Byte:
+      return memcmp(&zero, default_val, 1) != 0;
+    case kUpb_FieldRep_4Byte:
+      return memcmp(&zero, default_val, 4) != 0;
+    case kUpb_FieldRep_8Byte:
+      return memcmp(&zero, default_val, 8) != 0;
+    case kUpb_FieldRep_StringView: {
+      const upb_StringView* sv = (const upb_StringView*)default_val;
+      return sv->size != 0;
+    }
+  }
+  UPB_UNREACHABLE();
+}
+
+UPB_INLINE void _upb_MiniTable_CopyFieldData(void* to, const void* from,
+                                             const upb_MiniTableField* field) {
+  switch (_upb_MiniTableField_GetRep(field)) {
+    case kUpb_FieldRep_1Byte:
+      memcpy(to, from, 1);
+      return;
+    case kUpb_FieldRep_4Byte:
+      memcpy(to, from, 4);
+      return;
+    case kUpb_FieldRep_8Byte:
+      memcpy(to, from, 8);
+      return;
+    case kUpb_FieldRep_StringView: {
+      memcpy(to, from, sizeof(upb_StringView));
+      return;
+    }
+  }
+  UPB_UNREACHABLE();
+}
+
+UPB_INLINE size_t
+_upb_MiniTable_ElementSizeLg2(const upb_MiniTableField* field) {
+  const unsigned char table[] = {
+      0,
+      3,               // kUpb_FieldType_Double = 1,
+      2,               // kUpb_FieldType_Float = 2,
+      3,               // kUpb_FieldType_Int64 = 3,
+      3,               // kUpb_FieldType_UInt64 = 4,
+      2,               // kUpb_FieldType_Int32 = 5,
+      3,               // kUpb_FieldType_Fixed64 = 6,
+      2,               // kUpb_FieldType_Fixed32 = 7,
+      0,               // kUpb_FieldType_Bool = 8,
+      UPB_SIZE(3, 4),  // kUpb_FieldType_String = 9,
+      UPB_SIZE(2, 3),  // kUpb_FieldType_Group = 10,
+      UPB_SIZE(2, 3),  // kUpb_FieldType_Message = 11,
+      UPB_SIZE(3, 4),  // kUpb_FieldType_Bytes = 12,
+      2,               // kUpb_FieldType_UInt32 = 13,
+      2,               // kUpb_FieldType_Enum = 14,
+      2,               // kUpb_FieldType_SFixed32 = 15,
+      3,               // kUpb_FieldType_SFixed64 = 16,
+      2,               // kUpb_FieldType_SInt32 = 17,
+      3,               // kUpb_FieldType_SInt64 = 18,
+  };
+  return table[field->UPB_PRIVATE(descriptortype)];
+}
+
+// Here we define universal getter/setter functions for message fields.
+// These look very branchy and inefficient, but as long as the MiniTableField
+// values are known at compile time, all the branches are optimized away and
+// we are left with ideal code.  This can happen either through through
+// literals or UPB_ASSUME():
+//
+//   // Via struct literals.
+//   bool FooMessage_set_bool_field(const upb_Message* msg, bool val) {
+//     const upb_MiniTableField field = {1, 0, 0, /* etc... */};
+//     // All value in "field" are compile-time known.
+//     _upb_Message_SetNonExtensionField(msg, &field, &value);
+//   }
+//
+//   // Via UPB_ASSUME().
+//   UPB_INLINE bool upb_Message_SetBool(upb_Message* msg,
+//                                       const upb_MiniTableField* field,
+//                                       bool value, upb_Arena* a) {
+//     UPB_ASSUME(field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Bool);
+//     UPB_ASSUME(!upb_IsRepeatedOrMap(field));
+//     UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_1Byte);
+//     _upb_Message_SetField(msg, field, &value, a);
+//   }
+//
+// As a result, we can use these universal getters/setters for *all* message
+// accessors: generated code, MiniTable accessors, and reflection.  The only
+// exception is the binary encoder/decoder, which need to be a bit more clever
+// about how they read/write the message data, for efficiency.
+//
+// These functions work on both extensions and non-extensions. If the field
+// of a setter is known to be a non-extension, the arena may be NULL and the
+// returned bool value may be ignored since it will always succeed.
+
+UPB_INLINE bool _upb_Message_HasExtensionField(
+    const upb_Message* msg, const upb_MiniTableExtension* ext) {
+  UPB_ASSERT(upb_MiniTableField_HasPresence(&ext->field));
+  return _upb_Message_Getext(msg, ext) != NULL;
+}
+
+UPB_INLINE bool _upb_Message_HasNonExtensionField(
+    const upb_Message* msg, const upb_MiniTableField* field) {
+  UPB_ASSERT(upb_MiniTableField_HasPresence(field));
+  UPB_ASSUME(!upb_MiniTableField_IsExtension(field));
+  if (_upb_MiniTableField_InOneOf(field)) {
+    return _upb_getoneofcase_field(msg, field) == field->number;
+  } else {
+    return _upb_hasbit_field(msg, field);
+  }
+}
+
+static UPB_FORCEINLINE void _upb_Message_GetNonExtensionField(
+    const upb_Message* msg, const upb_MiniTableField* field,
+    const void* default_val, void* val) {
+  UPB_ASSUME(!upb_MiniTableField_IsExtension(field));
+  if ((_upb_MiniTableField_InOneOf(field) ||
+       _upb_MiniTable_ValueIsNonZero(default_val, field)) &&
+      !_upb_Message_HasNonExtensionField(msg, field)) {
+    _upb_MiniTable_CopyFieldData(val, default_val, field);
+    return;
+  }
+  _upb_MiniTable_CopyFieldData(val, _upb_MiniTableField_GetConstPtr(msg, field),
+                               field);
+}
+
+UPB_INLINE void _upb_Message_GetExtensionField(
+    const upb_Message* msg, const upb_MiniTableExtension* mt_ext,
+    const void* default_val, void* val) {
+  UPB_ASSUME(upb_MiniTableField_IsExtension(&mt_ext->field));
+  const upb_Message_Extension* ext = _upb_Message_Getext(msg, mt_ext);
+  if (ext) {
+    _upb_MiniTable_CopyFieldData(val, &ext->data, &mt_ext->field);
+  } else {
+    _upb_MiniTable_CopyFieldData(val, default_val, &mt_ext->field);
+  }
+}
+
+UPB_INLINE void _upb_Message_GetField(const upb_Message* msg,
+                                      const upb_MiniTableField* field,
+                                      const void* default_val, void* val) {
+  if (upb_MiniTableField_IsExtension(field)) {
+    _upb_Message_GetExtensionField(msg, (upb_MiniTableExtension*)field,
+                                   default_val, val);
+  } else {
+    _upb_Message_GetNonExtensionField(msg, field, default_val, val);
+  }
+}
+
+UPB_INLINE void _upb_Message_SetNonExtensionField(
+    upb_Message* msg, const upb_MiniTableField* field, const void* val) {
+  UPB_ASSUME(!upb_MiniTableField_IsExtension(field));
+  _upb_Message_SetPresence(msg, field);
+  _upb_MiniTable_CopyFieldData(_upb_MiniTableField_GetPtr(msg, field), val,
+                               field);
+}
+
+UPB_INLINE bool _upb_Message_SetExtensionField(
+    upb_Message* msg, const upb_MiniTableExtension* mt_ext, const void* val,
+    upb_Arena* a) {
+  UPB_ASSERT(a);
+  upb_Message_Extension* ext =
+      _upb_Message_GetOrCreateExtension(msg, mt_ext, a);
+  if (!ext) return false;
+  _upb_MiniTable_CopyFieldData(&ext->data, val, &mt_ext->field);
+  return true;
+}
+
+UPB_INLINE bool _upb_Message_SetField(upb_Message* msg,
+                                      const upb_MiniTableField* field,
+                                      const void* val, upb_Arena* a) {
+  if (upb_MiniTableField_IsExtension(field)) {
+    const upb_MiniTableExtension* ext = (const upb_MiniTableExtension*)field;
+    return _upb_Message_SetExtensionField(msg, ext, val, a);
+  } else {
+    _upb_Message_SetNonExtensionField(msg, field, val);
+    return true;
+  }
+}
+
+UPB_INLINE void _upb_Message_ClearExtensionField(
+    upb_Message* msg, const upb_MiniTableExtension* ext_l) {
+  upb_Message_Internal* in = upb_Message_Getinternal(msg);
+  if (!in->internal) return;
+  const upb_Message_Extension* base =
+      UPB_PTR_AT(in->internal, in->internal->ext_begin, upb_Message_Extension);
+  upb_Message_Extension* ext =
+      (upb_Message_Extension*)_upb_Message_Getext(msg, ext_l);
+  if (ext) {
+    *ext = *base;
+    in->internal->ext_begin += sizeof(upb_Message_Extension);
+  }
+}
+
+UPB_INLINE void _upb_Message_ClearNonExtensionField(
+    upb_Message* msg, const upb_MiniTableField* field) {
+  if (field->presence > 0) {
+    _upb_clearhas(msg, _upb_Message_Hasidx(field));
+  } else if (_upb_MiniTableField_InOneOf(field)) {
+    uint32_t* oneof_case = _upb_oneofcase_field(msg, field);
+    if (*oneof_case != field->number) return;
+    *oneof_case = 0;
+  }
+  const char zeros[16] = {0};
+  _upb_MiniTable_CopyFieldData(_upb_MiniTableField_GetPtr(msg, field), zeros,
+                               field);
+}
+
+UPB_INLINE void _upb_Message_AssertMapIsUntagged(
+    const upb_Message* msg, const upb_MiniTableField* field) {
+  UPB_UNUSED(msg);
+  _upb_MiniTableField_CheckIsMap(field);
+#ifndef NDEBUG
+  upb_TaggedMessagePtr default_val = 0;
+  upb_TaggedMessagePtr tagged;
+  _upb_Message_GetNonExtensionField(msg, field, &default_val, &tagged);
+  UPB_ASSERT(!upb_TaggedMessagePtr_IsEmpty(tagged));
+#endif
+}
+
+UPB_INLINE upb_Map* _upb_Message_GetOrCreateMutableMap(
+    upb_Message* msg, const upb_MiniTableField* field, size_t key_size,
+    size_t val_size, upb_Arena* arena) {
+  _upb_MiniTableField_CheckIsMap(field);
+  _upb_Message_AssertMapIsUntagged(msg, field);
+  upb_Map* map = NULL;
+  upb_Map* default_map_value = NULL;
+  _upb_Message_GetNonExtensionField(msg, field, &default_map_value, &map);
+  if (!map) {
+    map = _upb_Map_New(arena, key_size, val_size);
+    // Check again due to: https://godbolt.org/z/7WfaoKG1r
+    _upb_MiniTableField_CheckIsMap(field);
+    _upb_Message_SetNonExtensionField(msg, field, &map);
+  }
+  return map;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MESSAGE_INTERNAL_ACCESSORS_H_

Pods/gRPC-C++/third_party/upb/upb/message/internal/array.h

@@ -0,0 +1,138 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_MESSAGE_INTERNAL_ARRAY_H_
+#define UPB_MESSAGE_INTERNAL_ARRAY_H_
+
+#include <string.h>
+
+#include "upb/message/array.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// LINT.IfChange(struct_definition)
+// Our internal representation for repeated fields.
+struct upb_Array {
+  uintptr_t data;  /* Tagged ptr: low 3 bits of ptr are lg2(elem size). */
+  size_t size;     /* The number of elements in the array. */
+  size_t capacity; /* Allocated storage. Measured in elements. */
+};
+// LINT.ThenChange(GoogleInternalName1)
+
+UPB_INLINE size_t _upb_Array_ElementSizeLg2(const upb_Array* arr) {
+  size_t ret = arr->data & 7;
+  UPB_ASSERT(ret <= 4);
+  return ret;
+}
+
+UPB_INLINE const void* _upb_array_constptr(const upb_Array* arr) {
+  _upb_Array_ElementSizeLg2(arr);  // Check assertion.
+  return (void*)(arr->data & ~(uintptr_t)7);
+}
+
+UPB_INLINE uintptr_t _upb_array_tagptr(void* ptr, int elem_size_lg2) {
+  UPB_ASSERT(elem_size_lg2 <= 4);
+  return (uintptr_t)ptr | elem_size_lg2;
+}
+
+UPB_INLINE void* _upb_array_ptr(upb_Array* arr) {
+  return (void*)_upb_array_constptr(arr);
+}
+
+UPB_INLINE uintptr_t _upb_tag_arrptr(void* ptr, int elem_size_lg2) {
+  UPB_ASSERT(elem_size_lg2 <= 4);
+  UPB_ASSERT(((uintptr_t)ptr & 7) == 0);
+  return (uintptr_t)ptr | (unsigned)elem_size_lg2;
+}
+
+extern const char _upb_Array_CTypeSizeLg2Table[];
+
+UPB_INLINE size_t _upb_Array_CTypeSizeLg2(upb_CType ctype) {
+  return _upb_Array_CTypeSizeLg2Table[ctype];
+}
+
+UPB_INLINE upb_Array* _upb_Array_New(upb_Arena* a, size_t init_capacity,
+                                     int elem_size_lg2) {
+  UPB_ASSERT(elem_size_lg2 <= 4);
+  const size_t arr_size = UPB_ALIGN_UP(sizeof(upb_Array), UPB_MALLOC_ALIGN);
+  const size_t bytes = arr_size + (init_capacity << elem_size_lg2);
+  upb_Array* arr = (upb_Array*)upb_Arena_Malloc(a, bytes);
+  if (!arr) return NULL;
+  arr->data = _upb_tag_arrptr(UPB_PTR_AT(arr, arr_size, void), elem_size_lg2);
+  arr->size = 0;
+  arr->capacity = init_capacity;
+  return arr;
+}
+
+// Resizes the capacity of the array to be at least min_size.
+bool _upb_array_realloc(upb_Array* arr, size_t min_size, upb_Arena* arena);
+
+UPB_INLINE bool _upb_array_reserve(upb_Array* arr, size_t size,
+                                   upb_Arena* arena) {
+  if (arr->capacity < size) return _upb_array_realloc(arr, size, arena);
+  return true;
+}
+
+// Resize without initializing new elements.
+UPB_INLINE bool _upb_Array_ResizeUninitialized(upb_Array* arr, size_t size,
+                                               upb_Arena* arena) {
+  UPB_ASSERT(size <= arr->size || arena);  // Allow NULL arena when shrinking.
+  if (!_upb_array_reserve(arr, size, arena)) return false;
+  arr->size = size;
+  return true;
+}
+
+// This function is intended for situations where elem_size is compile-time
+// constant or a known expression of the form (1 << lg2), so that the expression
+// i*elem_size does not result in an actual multiplication.
+UPB_INLINE void _upb_Array_Set(upb_Array* arr, size_t i, const void* data,
+                               size_t elem_size) {
+  UPB_ASSERT(i < arr->size);
+  UPB_ASSERT(elem_size == 1U << _upb_Array_ElementSizeLg2(arr));
+  char* arr_data = (char*)_upb_array_ptr(arr);
+  memcpy(arr_data + (i * elem_size), data, elem_size);
+}
+
+UPB_INLINE void _upb_array_detach(const void* msg, size_t ofs) {
+  *UPB_PTR_AT(msg, ofs, upb_Array*) = NULL;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_INTERNAL_ARRAY_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/extension.h

@@ -0,0 +1,63 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MESSAGE_INTERNAL_EXTENSION_H_
+#define UPB_MESSAGE_INTERNAL_EXTENSION_H_
+
+#include "upb/base/descriptor_constants.h"
+#include "upb/base/string_view.h"
+#include "upb/mem/arena.h"
+#include "upb/message/message.h"
+#include "upb/mini_table/extension.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// The internal representation of an extension is self-describing: it contains
+// enough information that we can serialize it to binary format without needing
+// to look it up in a upb_ExtensionRegistry.
+//
+// This representation allocates 16 bytes to data on 64-bit platforms.
+// This is rather wasteful for scalars (in the extreme case of bool,
+// it wastes 15 bytes). We accept this because we expect messages to be
+// the most common extension type.
+typedef struct {
+  const upb_MiniTableExtension* ext;
+  union {
+    upb_StringView str;
+    void* ptr;
+    char scalar_data[8];
+  } data;
+} upb_Message_Extension;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Adds the given extension data to the given message.
+// |ext| is copied into the message instance.
+// This logically replaces any previously-added extension with this number.
+upb_Message_Extension* _upb_Message_GetOrCreateExtension(
+    upb_Message* msg, const upb_MiniTableExtension* ext, upb_Arena* arena);
+
+// Returns an array of extensions for this message.
+// Note: the array is ordered in reverse relative to the order of creation.
+const upb_Message_Extension* _upb_Message_Getexts(const upb_Message* msg,
+                                                  size_t* count);
+
+// Returns an extension for the given field number, or NULL if no extension
+// exists for this field number.
+const upb_Message_Extension* _upb_Message_Getext(
+    const upb_Message* msg, const upb_MiniTableExtension* ext);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_INTERNAL_EXTENSION_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/map.h

@@ -0,0 +1,173 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// EVERYTHING BELOW THIS LINE IS INTERNAL - DO NOT USE /////////////////////////
+
+#ifndef UPB_COLLECTIONS_INTERNAL_MAP_H_
+#define UPB_COLLECTIONS_INTERNAL_MAP_H_
+
+#include "upb/base/string_view.h"
+#include "upb/hash/str_table.h"
+#include "upb/mem/arena.h"
+#include "upb/message/map.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_Map {
+  // Size of key and val, based on the map type.
+  // Strings are represented as '0' because they must be handled specially.
+  char key_size;
+  char val_size;
+
+  upb_strtable table;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Converting between internal table representation and user values.
+//
+// _upb_map_tokey() and _upb_map_fromkey() are inverses.
+// _upb_map_tovalue() and _upb_map_fromvalue() are inverses.
+//
+// These functions account for the fact that strings are treated differently
+// from other types when stored in a map.
+
+UPB_INLINE upb_StringView _upb_map_tokey(const void* key, size_t size) {
+  if (size == UPB_MAPTYPE_STRING) {
+    return *(upb_StringView*)key;
+  } else {
+    return upb_StringView_FromDataAndSize((const char*)key, size);
+  }
+}
+
+UPB_INLINE void _upb_map_fromkey(upb_StringView key, void* out, size_t size) {
+  if (size == UPB_MAPTYPE_STRING) {
+    memcpy(out, &key, sizeof(key));
+  } else {
+    memcpy(out, key.data, size);
+  }
+}
+
+UPB_INLINE bool _upb_map_tovalue(const void* val, size_t size,
+                                 upb_value* msgval, upb_Arena* a) {
+  if (size == UPB_MAPTYPE_STRING) {
+    upb_StringView* strp = (upb_StringView*)upb_Arena_Malloc(a, sizeof(*strp));
+    if (!strp) return false;
+    *strp = *(upb_StringView*)val;
+    *msgval = upb_value_ptr(strp);
+  } else {
+    memcpy(msgval, val, size);
+  }
+  return true;
+}
+
+UPB_INLINE void _upb_map_fromvalue(upb_value val, void* out, size_t size) {
+  if (size == UPB_MAPTYPE_STRING) {
+    const upb_StringView* strp = (const upb_StringView*)upb_value_getptr(val);
+    memcpy(out, strp, sizeof(upb_StringView));
+  } else {
+    memcpy(out, &val, size);
+  }
+}
+
+UPB_INLINE void* _upb_map_next(const upb_Map* map, size_t* iter) {
+  upb_strtable_iter it;
+  it.t = &map->table;
+  it.index = *iter;
+  upb_strtable_next(&it);
+  *iter = it.index;
+  if (upb_strtable_done(&it)) return NULL;
+  return (void*)str_tabent(&it);
+}
+
+UPB_INLINE void _upb_Map_Clear(upb_Map* map) {
+  upb_strtable_clear(&map->table);
+}
+
+UPB_INLINE bool _upb_Map_Delete(upb_Map* map, const void* key, size_t key_size,
+                                upb_value* val) {
+  upb_StringView k = _upb_map_tokey(key, key_size);
+  return upb_strtable_remove2(&map->table, k.data, k.size, val);
+}
+
+UPB_INLINE bool _upb_Map_Get(const upb_Map* map, const void* key,
+                             size_t key_size, void* val, size_t val_size) {
+  upb_value tabval;
+  upb_StringView k = _upb_map_tokey(key, key_size);
+  bool ret = upb_strtable_lookup2(&map->table, k.data, k.size, &tabval);
+  if (ret && val) {
+    _upb_map_fromvalue(tabval, val, val_size);
+  }
+  return ret;
+}
+
+UPB_INLINE upb_MapInsertStatus _upb_Map_Insert(upb_Map* map, const void* key,
+                                               size_t key_size, void* val,
+                                               size_t val_size, upb_Arena* a) {
+  upb_StringView strkey = _upb_map_tokey(key, key_size);
+  upb_value tabval = {0};
+  if (!_upb_map_tovalue(val, val_size, &tabval, a)) {
+    return kUpb_MapInsertStatus_OutOfMemory;
+  }
+
+  // TODO: add overwrite operation to minimize number of lookups.
+  bool removed =
+      upb_strtable_remove2(&map->table, strkey.data, strkey.size, NULL);
+  if (!upb_strtable_insert(&map->table, strkey.data, strkey.size, tabval, a)) {
+    return kUpb_MapInsertStatus_OutOfMemory;
+  }
+  return removed ? kUpb_MapInsertStatus_Replaced
+                 : kUpb_MapInsertStatus_Inserted;
+}
+
+UPB_INLINE size_t _upb_Map_Size(const upb_Map* map) {
+  return map->table.t.count;
+}
+
+// Strings/bytes are special-cased in maps.
+extern char _upb_Map_CTypeSizeTable[12];
+
+UPB_INLINE size_t _upb_Map_CTypeSize(upb_CType ctype) {
+  return _upb_Map_CTypeSizeTable[ctype];
+}
+
+// Creates a new map on the given arena with this key/value type.
+upb_Map* _upb_Map_New(upb_Arena* a, size_t key_size, size_t value_size);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_COLLECTIONS_INTERNAL_MAP_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/map_entry.h

@@ -0,0 +1,66 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_COLLECTIONS_INTERNAL_MAP_ENTRY_H_
+#define UPB_COLLECTIONS_INTERNAL_MAP_ENTRY_H_
+
+#include "upb/base/string_view.h"
+#include "upb/hash/common.h"
+#include "upb/message/internal/types.h"
+
+// Map entries aren't actually stored for map fields, they are only used during
+// parsing. For parsing, it helps a lot if all map entry messages have the same
+// layout. The layout code in mini_table/decode.c will ensure that all map
+// entries have this layout.
+//
+// Note that users can and do create map entries directly, which will also use
+// this layout.
+//
+// NOTE: sync with wire/decode.c.
+typedef struct {
+  // We only need 2 hasbits max, but due to alignment we'll use 8 bytes here,
+  // and the uint64_t helps make this clear.
+  uint64_t hasbits;
+  union {
+    upb_StringView str;  // For str/bytes.
+    upb_value val;       // For all other types.
+  } k;
+  union {
+    upb_StringView str;  // For str/bytes.
+    upb_value val;       // For all other types.
+  } v;
+} upb_MapEntryData;
+
+typedef struct {
+  upb_Message_Internal internal;
+  upb_MapEntryData data;
+} upb_MapEntry;
+
+#endif  // UPB_COLLECTIONS_INTERNAL_MAP_ENTRY_H_

Pods/gRPC-C++/third_party/upb/upb/message/internal/map_sorter.h

@@ -0,0 +1,112 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// EVERYTHING BELOW THIS LINE IS INTERNAL - DO NOT USE /////////////////////////
+
+#ifndef UPB_COLLECTIONS_INTERNAL_MAP_SORTER_H_
+#define UPB_COLLECTIONS_INTERNAL_MAP_SORTER_H_
+
+#include <stdlib.h>
+
+#include "upb/message/internal/extension.h"
+#include "upb/message/internal/map.h"
+#include "upb/message/internal/map_entry.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// _upb_mapsorter sorts maps and provides ordered iteration over the entries.
+// Since maps can be recursive (map values can be messages which contain other
+// maps), _upb_mapsorter can contain a stack of maps.
+
+typedef struct {
+  void const** entries;
+  int size;
+  int cap;
+} _upb_mapsorter;
+
+typedef struct {
+  int start;
+  int pos;
+  int end;
+} _upb_sortedmap;
+
+UPB_INLINE void _upb_mapsorter_init(_upb_mapsorter* s) {
+  s->entries = NULL;
+  s->size = 0;
+  s->cap = 0;
+}
+
+UPB_INLINE void _upb_mapsorter_destroy(_upb_mapsorter* s) {
+  if (s->entries) free(s->entries);
+}
+
+UPB_INLINE bool _upb_sortedmap_next(_upb_mapsorter* s, const upb_Map* map,
+                                    _upb_sortedmap* sorted, upb_MapEntry* ent) {
+  if (sorted->pos == sorted->end) return false;
+  const upb_tabent* tabent = (const upb_tabent*)s->entries[sorted->pos++];
+  upb_StringView key = upb_tabstrview(tabent->key);
+  _upb_map_fromkey(key, &ent->data.k, map->key_size);
+  upb_value val = {tabent->val.val};
+  _upb_map_fromvalue(val, &ent->data.v, map->val_size);
+  return true;
+}
+
+UPB_INLINE bool _upb_sortedmap_nextext(_upb_mapsorter* s,
+                                       _upb_sortedmap* sorted,
+                                       const upb_Message_Extension** ext) {
+  if (sorted->pos == sorted->end) return false;
+  *ext = (const upb_Message_Extension*)s->entries[sorted->pos++];
+  return true;
+}
+
+UPB_INLINE void _upb_mapsorter_popmap(_upb_mapsorter* s,
+                                      _upb_sortedmap* sorted) {
+  s->size = sorted->start;
+}
+
+bool _upb_mapsorter_pushmap(_upb_mapsorter* s, upb_FieldType key_type,
+                            const upb_Map* map, _upb_sortedmap* sorted);
+
+bool _upb_mapsorter_pushexts(_upb_mapsorter* s,
+                             const upb_Message_Extension* exts, size_t count,
+                             _upb_sortedmap* sorted);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_COLLECTIONS_INTERNAL_MAP_SORTER_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/message.h

@@ -0,0 +1,106 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/*
+** Our memory representation for parsing tables and messages themselves.
+** Functions in this file are used by generated code and possibly reflection.
+**
+** The definitions in this file are internal to upb.
+**/
+
+#ifndef UPB_MESSAGE_INTERNAL_H_
+#define UPB_MESSAGE_INTERNAL_H_
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "upb/message/internal/extension.h"
+#include "upb/message/internal/types.h"
+#include "upb/message/message.h"
+#include "upb/mini_table/extension.h"
+#include "upb/mini_table/extension_registry.h"
+#include "upb/mini_table/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern const float kUpb_FltInfinity;
+extern const double kUpb_Infinity;
+extern const double kUpb_NaN;
+
+/* Internal members of a upb_Message that track unknown fields and/or
+ * extensions. We can change this without breaking binary compatibility.  We put
+ * these before the user's data.  The user's upb_Message* points after the
+ * upb_Message_Internal. */
+
+struct upb_Message_InternalData {
+  /* Total size of this structure, including the data that follows.
+   * Must be aligned to 8, which is alignof(upb_Message_Extension) */
+  uint32_t size;
+
+  /* Offsets relative to the beginning of this structure.
+   *
+   * Unknown data grows forward from the beginning to unknown_end.
+   * Extension data grows backward from size to ext_begin.
+   * When the two meet, we're out of data and have to realloc.
+   *
+   * If we imagine that the final member of this struct is:
+   *   char data[size - overhead];  // overhead =
+   * sizeof(upb_Message_InternalData)
+   *
+   * Then we have:
+   *   unknown data: data[0 .. (unknown_end - overhead)]
+   *   extensions data: data[(ext_begin - overhead) .. (size - overhead)] */
+  uint32_t unknown_end;
+  uint32_t ext_begin;
+  /* Data follows, as if there were an array:
+   *   char data[size - sizeof(upb_Message_InternalData)]; */
+};
+
+/* Maps upb_CType -> memory size. */
+extern char _upb_CTypeo_size[12];
+
+UPB_INLINE size_t upb_msg_sizeof(const upb_MiniTable* t) {
+  return t->size + sizeof(upb_Message_Internal);
+}
+
+// Inline version upb_Message_New(), for internal use.
+UPB_INLINE upb_Message* _upb_Message_New(const upb_MiniTable* mini_table,
+                                         upb_Arena* arena) {
+  size_t size = upb_msg_sizeof(mini_table);
+  void* mem = upb_Arena_Malloc(arena, size + sizeof(upb_Message_Internal));
+  if (UPB_UNLIKELY(!mem)) return NULL;
+  upb_Message* msg = UPB_PTR_AT(mem, sizeof(upb_Message_Internal), upb_Message);
+  memset(mem, 0, size);
+  return msg;
+}
+
+UPB_INLINE upb_Message_Internal* upb_Message_Getinternal(
+    const upb_Message* msg) {
+  ptrdiff_t size = sizeof(upb_Message_Internal);
+  return (upb_Message_Internal*)((char*)msg - size);
+}
+
+// Discards the unknown fields for this message only.
+void _upb_Message_DiscardUnknown_shallow(upb_Message* msg);
+
+// Adds unknown data (serialized protobuf data) to the given message.
+// The data is copied into the message instance.
+bool _upb_Message_AddUnknown(upb_Message* msg, const char* data, size_t len,
+                             upb_Arena* arena);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/internal/types.h

@@ -0,0 +1,23 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_TYPES_H_
+#define UPB_MINI_TABLE_INTERNAL_TYPES_H_
+
+typedef struct upb_Message_InternalData upb_Message_InternalData;
+
+typedef struct {
+  union {
+    upb_Message_InternalData* internal;
+
+    // Force 8-byte alignment, since the data members may contain members that
+    // require 8-byte alignment.
+    double d;
+  };
+} upb_Message_Internal;
+
+#endif  // UPB_MINI_TABLE_INTERNAL_TYPES_H_

Pods/gRPC-C++/third_party/upb/upb/message/map.h

@@ -0,0 +1,147 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef UPB_MESSAGE_MAP_H_
+#define UPB_MESSAGE_MAP_H_
+
+#include <stddef.h>
+
+#include "upb/base/descriptor_constants.h"
+#include "upb/mem/arena.h"
+#include "upb/message/value.h"  // IWYU pragma: export
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef struct upb_Map upb_Map;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Creates a new map on the given arena with the given key/value size.
+UPB_API upb_Map* upb_Map_New(upb_Arena* a, upb_CType key_type,
+                             upb_CType value_type);
+
+// Returns the number of entries in the map.
+UPB_API size_t upb_Map_Size(const upb_Map* map);
+
+// Stores a value for the given key into |*val| (or the zero value if the key is
+// not present). Returns whether the key was present. The |val| pointer may be
+// NULL, in which case the function tests whether the given key is present.
+UPB_API bool upb_Map_Get(const upb_Map* map, upb_MessageValue key,
+                         upb_MessageValue* val);
+
+// Removes all entries in the map.
+UPB_API void upb_Map_Clear(upb_Map* map);
+
+typedef enum {
+  kUpb_MapInsertStatus_Inserted = 0,
+  kUpb_MapInsertStatus_Replaced = 1,
+  kUpb_MapInsertStatus_OutOfMemory = 2,
+} upb_MapInsertStatus;
+
+// Sets the given key to the given value, returning whether the key was inserted
+// or replaced. If the key was inserted, then any existing iterators will be
+// invalidated.
+UPB_API upb_MapInsertStatus upb_Map_Insert(upb_Map* map, upb_MessageValue key,
+                                           upb_MessageValue val,
+                                           upb_Arena* arena);
+
+// Sets the given key to the given value. Returns false if memory allocation
+// failed. If the key is newly inserted, then any existing iterators will be
+// invalidated.
+UPB_API_INLINE bool upb_Map_Set(upb_Map* map, upb_MessageValue key,
+                                upb_MessageValue val, upb_Arena* arena) {
+  return upb_Map_Insert(map, key, val, arena) !=
+         kUpb_MapInsertStatus_OutOfMemory;
+}
+
+// Deletes this key from the table. Returns true if the key was present.
+// If present and |val| is non-NULL, stores the deleted value.
+UPB_API bool upb_Map_Delete(upb_Map* map, upb_MessageValue key,
+                            upb_MessageValue* val);
+
+// (DEPRECATED and going away soon. Do not use.)
+UPB_INLINE bool upb_Map_Delete2(upb_Map* map, upb_MessageValue key,
+                                upb_MessageValue* val) {
+  return upb_Map_Delete(map, key, val);
+}
+
+// Map iteration:
+//
+// size_t iter = kUpb_Map_Begin;
+// upb_MessageValue key, val;
+// while (upb_Map_Next(map, &key, &val, &iter)) {
+//   ...
+// }
+
+#define kUpb_Map_Begin ((size_t)-1)
+
+// Advances to the next entry. Returns false if no more entries are present.
+// Otherwise returns true and populates both *key and *value.
+UPB_API bool upb_Map_Next(const upb_Map* map, upb_MessageValue* key,
+                          upb_MessageValue* val, size_t* iter);
+
+// Sets the value for the entry pointed to by iter.
+// WARNING: this does not currently work for string values!
+UPB_API void upb_Map_SetEntryValue(upb_Map* map, size_t iter,
+                                   upb_MessageValue val);
+
+// DEPRECATED iterator, slated for removal.
+
+/* Map iteration:
+ *
+ * size_t iter = kUpb_Map_Begin;
+ * while (upb_MapIterator_Next(map, &iter)) {
+ *   upb_MessageValue key = upb_MapIterator_Key(map, iter);
+ *   upb_MessageValue val = upb_MapIterator_Value(map, iter);
+ * }
+ */
+
+// Advances to the next entry. Returns false if no more entries are present.
+UPB_API bool upb_MapIterator_Next(const upb_Map* map, size_t* iter);
+
+// Returns true if the iterator still points to a valid entry, or false if the
+// iterator is past the last element. It is an error to call this function with
+// kUpb_Map_Begin (you must call next() at least once first).
+UPB_API bool upb_MapIterator_Done(const upb_Map* map, size_t iter);
+
+// Returns the key and value for this entry of the map.
+UPB_API upb_MessageValue upb_MapIterator_Key(const upb_Map* map, size_t iter);
+UPB_API upb_MessageValue upb_MapIterator_Value(const upb_Map* map, size_t iter);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_MAP_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/map_gencode_util.h

@@ -0,0 +1,81 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+// https://developers.google.com/protocol-buffers/
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// These functions are only used by generated code.
+
+#ifndef UPB_MESSAGE_MAP_GENCODE_UTIL_H_
+#define UPB_MESSAGE_MAP_GENCODE_UTIL_H_
+
+#include "upb/message/internal/map.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Message map operations, these get the map from the message first.
+
+UPB_INLINE void _upb_msg_map_key(const void* msg, void* key, size_t size) {
+  const upb_tabent* ent = (const upb_tabent*)msg;
+  uint32_t u32len;
+  upb_StringView k;
+  k.data = upb_tabstr(ent->key, &u32len);
+  k.size = u32len;
+  _upb_map_fromkey(k, key, size);
+}
+
+UPB_INLINE void _upb_msg_map_value(const void* msg, void* val, size_t size) {
+  const upb_tabent* ent = (const upb_tabent*)msg;
+  upb_value v = {ent->val.val};
+  _upb_map_fromvalue(v, val, size);
+}
+
+UPB_INLINE void _upb_msg_map_set_value(void* msg, const void* val,
+                                       size_t size) {
+  upb_tabent* ent = (upb_tabent*)msg;
+  // This is like _upb_map_tovalue() except the entry already exists
+  // so we can reuse the allocated upb_StringView for string fields.
+  if (size == UPB_MAPTYPE_STRING) {
+    upb_StringView* strp = (upb_StringView*)(uintptr_t)ent->val.val;
+    memcpy(strp, val, sizeof(*strp));
+  } else {
+    memcpy(&ent->val.val, val, size);
+  }
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_MAP_GENCODE_UTIL_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/message.h

@@ -0,0 +1,52 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// Public APIs for message operations that do not depend on the schema.
+//
+// MiniTable-based accessors live in accessors.h.
+
+#ifndef UPB_MESSAGE_MESSAGE_H_
+#define UPB_MESSAGE_MESSAGE_H_
+
+#include <stddef.h>
+
+#include "upb/mem/arena.h"
+#include "upb/message/types.h"  // IWYU pragma: export
+#include "upb/mini_table/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Creates a new message with the given mini_table on the given arena.
+UPB_API upb_Message* upb_Message_New(const upb_MiniTable* mini_table,
+                                     upb_Arena* arena);
+
+// Adds unknown data (serialized protobuf data) to the given message.
+// The data is copied into the message instance.
+void upb_Message_AddUnknown(upb_Message* msg, const char* data, size_t len,
+                            upb_Arena* arena);
+
+// Returns a reference to the message's unknown data.
+const char* upb_Message_GetUnknown(const upb_Message* msg, size_t* len);
+
+// Removes partial unknown data from message.
+void upb_Message_DeleteUnknown(upb_Message* msg, const char* data, size_t len);
+
+// Returns the number of extensions present in this message.
+size_t upb_Message_ExtensionCount(const upb_Message* msg);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MESSAGE_MESSAGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/tagged_ptr.h

@@ -0,0 +1,69 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_TYPES_H_
+#define UPB_MINI_TABLE_TYPES_H_
+
+#include <stdint.h>
+
+#include "upb/message/types.h"  // IWYU pragma: export
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// When a upb_Message* is stored in a message, array, or map, it is stored in a
+// tagged form.  If the tag bit is set, the referenced upb_Message is of type
+// _kUpb_MiniTable_Empty (a sentinel message type with no fields) instead of
+// that field's true message type.  This forms the basis of what we call
+// "dynamic tree shaking."
+//
+// See the documentation for kUpb_DecodeOption_ExperimentalAllowUnlinked for
+// more information.
+typedef uintptr_t upb_TaggedMessagePtr;
+
+// Internal-only because empty messages cannot be created by the user.
+UPB_INLINE upb_TaggedMessagePtr _upb_TaggedMessagePtr_Pack(upb_Message* ptr,
+                                                           bool empty) {
+  UPB_ASSERT(((uintptr_t)ptr & 1) == 0);
+  return (uintptr_t)ptr | (empty ? 1 : 0);
+}
+
+// Users who enable unlinked sub-messages must use this to test whether a
+// message is empty before accessing it.  If a message is empty, it must be
+// first promoted using the interfaces in message/promote.h.
+UPB_INLINE bool upb_TaggedMessagePtr_IsEmpty(upb_TaggedMessagePtr ptr) {
+  return ptr & 1;
+}
+
+UPB_INLINE upb_Message* _upb_TaggedMessagePtr_GetMessage(
+    upb_TaggedMessagePtr ptr) {
+  return (upb_Message*)(ptr & ~(uintptr_t)1);
+}
+
+UPB_INLINE upb_Message* upb_TaggedMessagePtr_GetNonEmptyMessage(
+    upb_TaggedMessagePtr ptr) {
+  UPB_ASSERT(!upb_TaggedMessagePtr_IsEmpty(ptr));
+  return _upb_TaggedMessagePtr_GetMessage(ptr);
+}
+
+UPB_INLINE upb_Message* _upb_TaggedMessagePtr_GetEmptyMessage(
+    upb_TaggedMessagePtr ptr) {
+  UPB_ASSERT(upb_TaggedMessagePtr_IsEmpty(ptr));
+  return _upb_TaggedMessagePtr_GetMessage(ptr);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_TYPES_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/types.h

@@ -0,0 +1,15 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MESSAGE_TYPES_H_
+#define UPB_MESSAGE_TYPES_H_
+
+// This typedef is in a leaf header to resolve a circular dependency between
+// messages and mini tables.
+typedef void upb_Message;
+
+#endif /* UPB_MESSAGE_TYPES_H_ */

Pods/gRPC-C++/third_party/upb/upb/message/value.h

@@ -0,0 +1,46 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// Users should include array.h or map.h instead.
+// IWYU pragma: private, include "upb/message/array.h"
+
+#ifndef UPB_MESSAGE_VALUE_H_
+#define UPB_MESSAGE_VALUE_H_
+
+#include <stdint.h>
+
+#include "upb/base/string_view.h"
+#include "upb/message/tagged_ptr.h"
+#include "upb/message/types.h"
+
+typedef union {
+  bool bool_val;
+  float float_val;
+  double double_val;
+  int32_t int32_val;
+  int64_t int64_val;
+  uint32_t uint32_val;
+  uint64_t uint64_val;
+  const struct upb_Array* array_val;
+  const struct upb_Map* map_val;
+  const upb_Message* msg_val;
+  upb_StringView str_val;
+
+  // EXPERIMENTAL: A tagged upb_Message*.  Users must use this instead of
+  // msg_val if unlinked sub-messages may possibly be in use.  See the
+  // documentation in kUpb_DecodeOption_ExperimentalAllowUnlinked for more
+  // information.
+  upb_TaggedMessagePtr tagged_msg_val;
+} upb_MessageValue;
+
+typedef union {
+  struct upb_Array* array;
+  struct upb_Map* map;
+  upb_Message* msg;
+} upb_MutableMessageValue;
+
+#endif /* UPB_MESSAGE_VALUE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/BUILD

@@ -0,0 +1,86 @@
+load(
+    "//bazel:build_defs.bzl",
+    "UPB_DEFAULT_COPTS",
+    "UPB_DEFAULT_CPPOPTS",
+)
+
+cc_library(
+    name = "mini_descriptor",
+    srcs = [
+        "build_enum.c",
+        "decode.c",
+        "link.c",
+    ],
+    hdrs = [
+        "build_enum.h",
+        "decode.h",
+        "link.h",
+    ],
+    copts = UPB_DEFAULT_COPTS,
+    visibility = ["//visibility:public"],
+    deps = [
+        ":internal",
+        "//upb:base",
+        "//upb:mem",
+        "//upb:mini_table",
+        "//upb:mini_table_internal",
+        "//upb:port",
+    ],
+)
+
+cc_library(
+    name = "internal",
+    srcs = [
+        "internal/base92.c",
+        "internal/encode.c",
+    ],
+    hdrs = [
+        "internal/base92.h",
+        "internal/decoder.h",
+        "internal/encode.h",
+        "internal/encode.hpp",
+        "internal/modifiers.h",
+        "internal/wire_constants.h",
+    ],
+    copts = UPB_DEFAULT_COPTS,
+    visibility = ["//visibility:public"],
+    deps = [
+        "//upb:base",
+        "//upb:base_internal",
+        "//upb:port",
+    ],
+)
+
+cc_test(
+    name = "encode_test",
+    srcs = ["internal/encode_test.cc"],
+    copts = UPB_DEFAULT_CPPOPTS,
+    deps = [
+        ":internal",
+        ":mini_descriptor",
+        "//:protobuf",
+        "@com_google_googletest//:gtest_main",
+        "//upb:base",
+        "//upb:mem",
+        "//upb:message_accessors_internal",
+        "//upb:mini_table",
+        "//upb:wire",
+        "@com_google_absl//absl/container:flat_hash_set",
+    ],
+)
+
+# begin:github_only
+filegroup(
+    name = "source_files",
+    srcs = glob(
+        [
+            "**/*.c",
+            "**/*.h",
+        ],
+    ),
+    visibility = [
+        "//upb/cmake:__pkg__",
+        "//python/dist:__pkg__",
+    ]
+)
+# end:github_only

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/build_enum.h

@@ -0,0 +1,42 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+#ifndef UPB_MINI_DESCRIPTOR_BUILD_ENUM_H_
+#define UPB_MINI_DESCRIPTOR_BUILD_ENUM_H_
+
+#include "upb/base/status.h"
+#include "upb/mem/arena.h"
+#include "upb/mini_table/enum.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Builds a upb_MiniTableEnum from an enum MiniDescriptor.  The MiniDescriptor
+// must be for an enum, not a message.
+UPB_API upb_MiniTableEnum* upb_MiniDescriptor_BuildEnum(const char* data,
+                                                        size_t len,
+                                                        upb_Arena* arena,
+                                                        upb_Status* status);
+
+// TODO: Deprecated name; update callers.
+UPB_API_INLINE upb_MiniTableEnum* upb_MiniTableEnum_Build(const char* data,
+                                                          size_t len,
+                                                          upb_Arena* arena,
+                                                          upb_Status* status) {
+  return upb_MiniDescriptor_BuildEnum(data, len, arena, status);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_BUILD_ENUM_H_

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/decode.h

@@ -0,0 +1,120 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_DECODE_H_
+#define UPB_MINI_TABLE_DECODE_H_
+
+#include "upb/base/status.h"
+#include "upb/mem/arena.h"
+#include "upb/mini_table/extension.h"
+#include "upb/mini_table/field.h"
+#include "upb/mini_table/message.h"
+#include "upb/mini_table/sub.h"
+
+// Export the newer headers, for legacy users.  New users should include the
+// more specific headers directly.
+// IWYU pragma: begin_exports
+#include "upb/mini_descriptor/build_enum.h"
+#include "upb/mini_descriptor/link.h"
+// IWYU pragma: end_exports
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef enum {
+  kUpb_MiniTablePlatform_32Bit,
+  kUpb_MiniTablePlatform_64Bit,
+  kUpb_MiniTablePlatform_Native =
+      UPB_SIZE(kUpb_MiniTablePlatform_32Bit, kUpb_MiniTablePlatform_64Bit),
+} upb_MiniTablePlatform;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Builds a mini table from the data encoded in the buffer [data, len]. If any
+// errors occur, returns NULL and sets a status message. In the success case,
+// the caller must call upb_MiniTable_SetSub*() for all message or proto2 enum
+// fields to link the table to the appropriate sub-tables.
+upb_MiniTable* _upb_MiniTable_Build(const char* data, size_t len,
+                                    upb_MiniTablePlatform platform,
+                                    upb_Arena* arena, upb_Status* status);
+
+UPB_API_INLINE upb_MiniTable* upb_MiniTable_Build(const char* data, size_t len,
+                                                  upb_Arena* arena,
+                                                  upb_Status* status) {
+  return _upb_MiniTable_Build(data, len, kUpb_MiniTablePlatform_Native, arena,
+                              status);
+}
+
+// Initializes a MiniTableExtension buffer that has already been allocated.
+// This is needed by upb_FileDef and upb_MessageDef, which allocate all of the
+// extensions together in a single contiguous array.
+const char* _upb_MiniTableExtension_Init(const char* data, size_t len,
+                                         upb_MiniTableExtension* ext,
+                                         const upb_MiniTable* extendee,
+                                         upb_MiniTableSub sub,
+                                         upb_MiniTablePlatform platform,
+                                         upb_Status* status);
+
+UPB_API_INLINE const char* upb_MiniTableExtension_Init(
+    const char* data, size_t len, upb_MiniTableExtension* ext,
+    const upb_MiniTable* extendee, upb_MiniTableSub sub, upb_Status* status) {
+  return _upb_MiniTableExtension_Init(data, len, ext, extendee, sub,
+                                      kUpb_MiniTablePlatform_Native, status);
+}
+
+UPB_API upb_MiniTableExtension* _upb_MiniTableExtension_Build(
+    const char* data, size_t len, const upb_MiniTable* extendee,
+    upb_MiniTableSub sub, upb_MiniTablePlatform platform, upb_Arena* arena,
+    upb_Status* status);
+
+UPB_API_INLINE upb_MiniTableExtension* upb_MiniTableExtension_Build(
+    const char* data, size_t len, const upb_MiniTable* extendee,
+    upb_Arena* arena, upb_Status* status) {
+  upb_MiniTableSub sub;
+  sub.submsg = NULL;
+  return _upb_MiniTableExtension_Build(
+      data, len, extendee, sub, kUpb_MiniTablePlatform_Native, arena, status);
+}
+
+UPB_API_INLINE upb_MiniTableExtension* upb_MiniTableExtension_BuildMessage(
+    const char* data, size_t len, const upb_MiniTable* extendee,
+    upb_MiniTable* submsg, upb_Arena* arena, upb_Status* status) {
+  upb_MiniTableSub sub;
+  sub.submsg = submsg;
+  return _upb_MiniTableExtension_Build(
+      data, len, extendee, sub, kUpb_MiniTablePlatform_Native, arena, status);
+}
+
+UPB_API_INLINE upb_MiniTableExtension* upb_MiniTableExtension_BuildEnum(
+    const char* data, size_t len, const upb_MiniTable* extendee,
+    upb_MiniTableEnum* subenum, upb_Arena* arena, upb_Status* status) {
+  upb_MiniTableSub sub;
+  sub.subenum = subenum;
+  return _upb_MiniTableExtension_Build(
+      data, len, extendee, sub, kUpb_MiniTablePlatform_Native, arena, status);
+}
+
+// Like upb_MiniTable_Build(), but the user provides a buffer of layout data so
+// it can be reused from call to call, avoiding repeated realloc()/free().
+//
+// The caller owns `*buf` both before and after the call, and must free() it
+// when it is no longer in use.  The function will realloc() `*buf` as
+// necessary, updating `*size` accordingly.
+upb_MiniTable* upb_MiniTable_BuildWithBuf(const char* data, size_t len,
+                                          upb_MiniTablePlatform platform,
+                                          upb_Arena* arena, void** buf,
+                                          size_t* buf_size, upb_Status* status);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_DECODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/base92.h

@@ -0,0 +1,63 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_
+#define UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_
+
+#include <stdint.h>
+
+#include "upb/base/internal/log2.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE char _upb_ToBase92(int8_t ch) {
+  extern const char _kUpb_ToBase92[];
+  UPB_ASSERT(0 <= ch && ch < 92);
+  return _kUpb_ToBase92[ch];
+}
+
+UPB_INLINE char _upb_FromBase92(uint8_t ch) {
+  extern const int8_t _kUpb_FromBase92[];
+  if (' ' > ch || ch > '~') return -1;
+  return _kUpb_FromBase92[ch - ' '];
+}
+
+UPB_INLINE const char* _upb_Base92_DecodeVarint(const char* ptr,
+                                                const char* end, char first_ch,
+                                                uint8_t min, uint8_t max,
+                                                uint32_t* out_val) {
+  uint32_t val = 0;
+  uint32_t shift = 0;
+  const int bits_per_char =
+      upb_Log2Ceiling(_upb_FromBase92(max) - _upb_FromBase92(min));
+  char ch = first_ch;
+  while (1) {
+    uint32_t bits = _upb_FromBase92(ch) - _upb_FromBase92(min);
+    val |= bits << shift;
+    if (ptr == end || *ptr < min || max < *ptr) {
+      *out_val = val;
+      UPB_ASSUME(ptr != NULL);
+      return ptr;
+    }
+    ch = *ptr++;
+    shift += bits_per_char;
+    if (shift >= 32) return NULL;
+  }
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_INTERNAL_BASE92_H_

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/decoder.h

@@ -0,0 +1,53 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_DECODER_H_
+#define UPB_MINI_DESCRIPTOR_INTERNAL_DECODER_H_
+
+#include "upb/base/status.h"
+#include "upb/mini_descriptor/internal/base92.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// upb_MdDecoder: used internally for decoding MiniDescriptors for messages,
+// extensions, and enums.
+typedef struct {
+  const char* end;
+  upb_Status* status;
+  jmp_buf err;
+} upb_MdDecoder;
+
+UPB_PRINTF(2, 3)
+UPB_NORETURN UPB_INLINE void upb_MdDecoder_ErrorJmp(upb_MdDecoder* d,
+                                                    const char* fmt, ...) {
+  if (d->status) {
+    va_list argp;
+    upb_Status_SetErrorMessage(d->status, "Error building mini table: ");
+    va_start(argp, fmt);
+    upb_Status_VAppendErrorFormat(d->status, fmt, argp);
+    va_end(argp);
+  }
+  UPB_LONGJMP(d->err, 1);
+}
+
+UPB_INLINE void upb_MdDecoder_CheckOutOfMemory(upb_MdDecoder* d,
+                                               const void* ptr) {
+  if (!ptr) upb_MdDecoder_ErrorJmp(d, "Out of memory");
+}
+
+UPB_INLINE const char* upb_MdDecoder_DecodeBase92Varint(
+    upb_MdDecoder* d, const char* ptr, char first_ch, uint8_t min, uint8_t max,
+    uint32_t* out_val) {
+  ptr = _upb_Base92_DecodeVarint(ptr, d->end, first_ch, min, max, out_val);
+  if (!ptr) upb_MdDecoder_ErrorJmp(d, "Overlong varint");
+  return ptr;
+}
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_INTERNAL_DECODER_H_

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/encode.h

@@ -0,0 +1,92 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_ENCODE_H_
+#define UPB_MINI_DESCRIPTOR_INTERNAL_ENCODE_H_
+
+#include <stdint.h>
+
+#include "upb/base/descriptor_constants.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// If the input buffer has at least this many bytes available, the encoder call
+// is guaranteed to succeed (as long as field number order is maintained).
+#define kUpb_MtDataEncoder_MinSize 16
+
+typedef struct {
+  char* end;  // Limit of the buffer passed as a parameter.
+  // Aliased to internal-only members in .cc.
+  char internal[32];
+} upb_MtDataEncoder;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Encodes field/oneof information for a given message.  The sequence of calls
+// should look like:
+//
+//   upb_MtDataEncoder e;
+//   char buf[256];
+//   char* ptr = buf;
+//   e.end = ptr + sizeof(buf);
+//   unit64_t msg_mod = ...; // bitwise & of kUpb_MessageModifiers or zero
+//   ptr = upb_MtDataEncoder_StartMessage(&e, ptr, msg_mod);
+//   // Fields *must* be in field number order.
+//   ptr = upb_MtDataEncoder_PutField(&e, ptr, ...);
+//   ptr = upb_MtDataEncoder_PutField(&e, ptr, ...);
+//   ptr = upb_MtDataEncoder_PutField(&e, ptr, ...);
+//
+//   // If oneofs are present.  Oneofs must be encoded after regular fields.
+//   ptr = upb_MiniTable_StartOneof(&e, ptr)
+//   ptr = upb_MiniTable_PutOneofField(&e, ptr, ...);
+//   ptr = upb_MiniTable_PutOneofField(&e, ptr, ...);
+//
+//   ptr = upb_MiniTable_StartOneof(&e, ptr);
+//   ptr = upb_MiniTable_PutOneofField(&e, ptr, ...);
+//   ptr = upb_MiniTable_PutOneofField(&e, ptr, ...);
+//
+// Oneofs must be encoded after all regular fields.
+char* upb_MtDataEncoder_StartMessage(upb_MtDataEncoder* e, char* ptr,
+                                     uint64_t msg_mod);
+char* upb_MtDataEncoder_PutField(upb_MtDataEncoder* e, char* ptr,
+                                 upb_FieldType type, uint32_t field_num,
+                                 uint64_t field_mod);
+char* upb_MtDataEncoder_StartOneof(upb_MtDataEncoder* e, char* ptr);
+char* upb_MtDataEncoder_PutOneofField(upb_MtDataEncoder* e, char* ptr,
+                                      uint32_t field_num);
+
+// Encodes the set of values for a given enum. The values must be given in
+// order (after casting to uint32_t), and repeats are not allowed.
+char* upb_MtDataEncoder_StartEnum(upb_MtDataEncoder* e, char* ptr);
+char* upb_MtDataEncoder_PutEnumValue(upb_MtDataEncoder* e, char* ptr,
+                                     uint32_t val);
+char* upb_MtDataEncoder_EndEnum(upb_MtDataEncoder* e, char* ptr);
+
+// Encodes an entire mini descriptor for an extension.
+char* upb_MtDataEncoder_EncodeExtension(upb_MtDataEncoder* e, char* ptr,
+                                        upb_FieldType type, uint32_t field_num,
+                                        uint64_t field_mod);
+
+// Encodes an entire mini descriptor for a map.
+char* upb_MtDataEncoder_EncodeMap(upb_MtDataEncoder* e, char* ptr,
+                                  upb_FieldType key_type,
+                                  upb_FieldType value_type, uint64_t key_mod,
+                                  uint64_t value_mod);
+
+// Encodes an entire mini descriptor for a message set.
+char* upb_MtDataEncoder_EncodeMessageSet(upb_MtDataEncoder* e, char* ptr);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_DESCRIPTOR_INTERNAL_ENCODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/encode.hpp

@@ -0,0 +1,118 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_ENCODE_INTERNAL_HPP_
+#define UPB_MINI_TABLE_ENCODE_INTERNAL_HPP_
+
+#include <string>
+
+#include "upb/base/internal/log2.h"
+#include "upb/mini_descriptor/internal/encode.h"
+
+namespace upb {
+
+class MtDataEncoder {
+ public:
+  MtDataEncoder() : appender_(&encoder_) {}
+
+  bool StartMessage(uint64_t msg_mod) {
+    return appender_([this, msg_mod](char* buf) {
+      return upb_MtDataEncoder_StartMessage(&encoder_, buf, msg_mod);
+    });
+  }
+
+  bool PutField(upb_FieldType type, uint32_t field_num, uint64_t field_mod) {
+    return appender_([this, type, field_num, field_mod](char* buf) {
+      return upb_MtDataEncoder_PutField(&encoder_, buf, type, field_num,
+                                        field_mod);
+    });
+  }
+
+  bool StartOneof() {
+    return appender_([this](char* buf) {
+      return upb_MtDataEncoder_StartOneof(&encoder_, buf);
+    });
+  }
+
+  bool PutOneofField(uint32_t field_num) {
+    return appender_([this, field_num](char* buf) {
+      return upb_MtDataEncoder_PutOneofField(&encoder_, buf, field_num);
+    });
+  }
+
+  bool StartEnum() {
+    return appender_([this](char* buf) {
+      return upb_MtDataEncoder_StartEnum(&encoder_, buf);
+    });
+  }
+
+  bool PutEnumValue(uint32_t enum_value) {
+    return appender_([this, enum_value](char* buf) {
+      return upb_MtDataEncoder_PutEnumValue(&encoder_, buf, enum_value);
+    });
+  }
+
+  bool EndEnum() {
+    return appender_([this](char* buf) {
+      return upb_MtDataEncoder_EndEnum(&encoder_, buf);
+    });
+  }
+
+  bool EncodeExtension(upb_FieldType type, uint32_t field_num,
+                       uint64_t field_mod) {
+    return appender_([this, type, field_num, field_mod](char* buf) {
+      return upb_MtDataEncoder_EncodeExtension(&encoder_, buf, type, field_num,
+                                               field_mod);
+    });
+  }
+
+  bool EncodeMap(upb_FieldType key_type, upb_FieldType val_type,
+                 uint64_t key_mod, uint64_t val_mod) {
+    return appender_([this, key_type, val_type, key_mod, val_mod](char* buf) {
+      return upb_MtDataEncoder_EncodeMap(&encoder_, buf, key_type, val_type,
+                                         key_mod, val_mod);
+    });
+  }
+
+  bool EncodeMessageSet() {
+    return appender_([this](char* buf) {
+      return upb_MtDataEncoder_EncodeMessageSet(&encoder_, buf);
+    });
+  }
+
+  const std::string& data() const { return appender_.data(); }
+
+ private:
+  class StringAppender {
+   public:
+    StringAppender(upb_MtDataEncoder* e) { e->end = buf_ + sizeof(buf_); }
+
+    template <class T>
+    bool operator()(T&& func) {
+      char* end = func(buf_);
+      if (!end) return false;
+      // C++ does not guarantee that string has doubling growth behavior, but
+      // we need it to avoid O(n^2).
+      str_.reserve(upb_Log2CeilingSize(str_.size() + (end - buf_)));
+      str_.append(buf_, end - buf_);
+      return true;
+    }
+
+    const std::string& data() const { return str_; }
+
+   private:
+    char buf_[kUpb_MtDataEncoder_MinSize];
+    std::string str_;
+  };
+
+  upb_MtDataEncoder encoder_;
+  StringAppender appender_;
+};
+
+}  // namespace upb
+
+#endif /* UPB_MINI_TABLE_ENCODE_INTERNAL_HPP_ */

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/modifiers.h

@@ -0,0 +1,32 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_MODIFIERS_H_
+#define UPB_MINI_DESCRIPTOR_INTERNAL_MODIFIERS_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef enum {
+  kUpb_FieldModifier_IsRepeated = 1 << 0,
+  kUpb_FieldModifier_IsPacked = 1 << 1,
+  kUpb_FieldModifier_IsClosedEnum = 1 << 2,
+  kUpb_FieldModifier_IsProto3Singular = 1 << 3,
+  kUpb_FieldModifier_IsRequired = 1 << 4,
+  kUpb_FieldModifier_ValidateUtf8 = 1 << 5,
+} kUpb_FieldModifier;
+
+// These modifiers are also used on the wire.
+typedef enum {
+  kUpb_MessageModifier_ValidateUtf8 = 1 << 0,
+  kUpb_MessageModifier_DefaultIsPacked = 1 << 1,
+  kUpb_MessageModifier_IsExtendable = 1 << 2,
+} kUpb_MessageModifier;
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_INTERNAL_MODIFIERS_H_

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/internal/wire_constants.h

@@ -0,0 +1,72 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_DESCRIPTOR_INTERNAL_WIRE_CONSTANTS_H_
+#define UPB_MINI_DESCRIPTOR_INTERNAL_WIRE_CONSTANTS_H_
+
+#include "upb/base/descriptor_constants.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+typedef enum {
+  kUpb_EncodedType_Double = 0,
+  kUpb_EncodedType_Float = 1,
+  kUpb_EncodedType_Fixed32 = 2,
+  kUpb_EncodedType_Fixed64 = 3,
+  kUpb_EncodedType_SFixed32 = 4,
+  kUpb_EncodedType_SFixed64 = 5,
+  kUpb_EncodedType_Int32 = 6,
+  kUpb_EncodedType_UInt32 = 7,
+  kUpb_EncodedType_SInt32 = 8,
+  kUpb_EncodedType_Int64 = 9,
+  kUpb_EncodedType_UInt64 = 10,
+  kUpb_EncodedType_SInt64 = 11,
+  kUpb_EncodedType_OpenEnum = 12,
+  kUpb_EncodedType_Bool = 13,
+  kUpb_EncodedType_Bytes = 14,
+  kUpb_EncodedType_String = 15,
+  kUpb_EncodedType_Group = 16,
+  kUpb_EncodedType_Message = 17,
+  kUpb_EncodedType_ClosedEnum = 18,
+
+  kUpb_EncodedType_RepeatedBase = 20,
+} upb_EncodedType;
+
+typedef enum {
+  kUpb_EncodedFieldModifier_FlipPacked = 1 << 0,
+  kUpb_EncodedFieldModifier_IsRequired = 1 << 1,
+  kUpb_EncodedFieldModifier_IsProto3Singular = 1 << 2,
+  kUpb_EncodedFieldModifier_FlipValidateUtf8 = 1 << 3,
+} upb_EncodedFieldModifier;
+
+enum {
+  kUpb_EncodedValue_MinField = ' ',
+  kUpb_EncodedValue_MaxField = 'I',
+  kUpb_EncodedValue_MinModifier = 'L',
+  kUpb_EncodedValue_MaxModifier = '[',
+  kUpb_EncodedValue_End = '^',
+  kUpb_EncodedValue_MinSkip = '_',
+  kUpb_EncodedValue_MaxSkip = '~',
+  kUpb_EncodedValue_OneofSeparator = '~',
+  kUpb_EncodedValue_FieldSeparator = '|',
+  kUpb_EncodedValue_MinOneofField = ' ',
+  kUpb_EncodedValue_MaxOneofField = 'b',
+  kUpb_EncodedValue_MaxEnumMask = 'A',
+};
+
+enum {
+  kUpb_EncodedVersion_EnumV1 = '!',
+  kUpb_EncodedVersion_ExtensionV1 = '#',
+  kUpb_EncodedVersion_MapV1 = '%',
+  kUpb_EncodedVersion_MessageV1 = '$',
+  kUpb_EncodedVersion_MessageSetV1 = '&',
+};
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_INTERNAL_WIRE_CONSTANTS_H_

Pods/gRPC-C++/third_party/upb/upb/mini_descriptor/link.h

@@ -0,0 +1,84 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// Functions for linking MiniTables together once they are built from a
+// MiniDescriptor.
+//
+// These functions have names like upb_MiniTable_Link() because they operate on
+// MiniTables.  We put them here, rather than in the mini_table/ directory,
+// because they are only needed when building MiniTables from MiniDescriptors.
+// The interfaces in mini_table/ assume that MiniTables are immutable.
+
+#ifndef UPB_MINI_DESCRIPTOR_LINK_H_
+#define UPB_MINI_DESCRIPTOR_LINK_H_
+
+#include "upb/base/status.h"
+#include "upb/mem/arena.h"
+#include "upb/mini_table/extension.h"
+#include "upb/mini_table/field.h"
+#include "upb/mini_table/message.h"
+#include "upb/mini_table/sub.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Links a sub-message field to a MiniTable for that sub-message. If a
+// sub-message field is not linked, it will be treated as an unknown field
+// during parsing, and setting the field will not be allowed. It is possible
+// to link the message field later, at which point it will no longer be treated
+// as unknown. However there is no synchronization for this operation, which
+// means parallel mutation requires external synchronization.
+// Returns success/failure.
+UPB_API bool upb_MiniTable_SetSubMessage(upb_MiniTable* table,
+                                         upb_MiniTableField* field,
+                                         const upb_MiniTable* sub);
+
+// Links an enum field to a MiniTable for that enum.
+// All enum fields must be linked prior to parsing.
+// Returns success/failure.
+UPB_API bool upb_MiniTable_SetSubEnum(upb_MiniTable* table,
+                                      upb_MiniTableField* field,
+                                      const upb_MiniTableEnum* sub);
+
+// Returns a list of fields that require linking at runtime, to connect the
+// MiniTable to its sub-messages and sub-enums.  The list of fields will be
+// written to the `subs` array, which must have been allocated by the caller
+// and must be large enough to hold a list of all fields in the message.
+//
+// The order of the fields returned by this function is significant: it matches
+// the order expected by upb_MiniTable_Link() below.
+//
+// The return value packs the sub-message count and sub-enum count into a single
+// integer like so:
+//  return (msg_count << 16) | enum_count;
+UPB_API uint32_t upb_MiniTable_GetSubList(const upb_MiniTable* mt,
+                                          const upb_MiniTableField** subs);
+
+// Links a message to its sub-messages and sub-enums.  The caller must pass
+// arrays of sub-tables and sub-enums, in the same length and order as is
+// returned by upb_MiniTable_GetSubList() above.  However, individual elements
+// of the sub_tables may be NULL if those sub-messages were tree shaken.
+//
+// Returns false if either array is too short, or if any of the tables fails
+// to link.
+UPB_API bool upb_MiniTable_Link(upb_MiniTable* mt,
+                                const upb_MiniTable** sub_tables,
+                                size_t sub_table_count,
+                                const upb_MiniTableEnum** sub_enums,
+                                size_t sub_enum_count);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_MINI_DESCRIPTOR_LINK_H_

Pods/gRPC-C++/third_party/upb/upb/mini_table/enum.h

@@ -0,0 +1,38 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_ENUM_H_
+#define UPB_MINI_TABLE_ENUM_H_
+
+#include "upb/mini_table/internal/enum.h"
+
+// Must be last
+#include "upb/port/def.inc"
+
+typedef struct upb_MiniTableEnum upb_MiniTableEnum;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Validates enum value against range defined by enum mini table.
+UPB_INLINE bool upb_MiniTableEnum_CheckValue(const struct upb_MiniTableEnum* e,
+                                             uint32_t val) {
+  _kUpb_FastEnumCheck_Status status = _upb_MiniTable_CheckEnumValueFast(e, val);
+  if (UPB_UNLIKELY(status == _kUpb_FastEnumCheck_CannotCheckFast)) {
+    return _upb_MiniTable_CheckEnumValueSlow(e, val);
+  }
+  return status == _kUpb_FastEnumCheck_ValueIsInEnum ? true : false;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_ENUM_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/extension.h

@@ -0,0 +1,15 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_EXTENSION_H_
+#define UPB_MINI_TABLE_EXTENSION_H_
+
+#include "upb/mini_table/internal/extension.h"
+
+typedef struct upb_MiniTableExtension upb_MiniTableExtension;
+
+#endif /* UPB_MINI_TABLE_EXTENSION_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/extension_registry.h

@@ -0,0 +1,85 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_EXTENSION_REGISTRY_H_
+#define UPB_MINI_TABLE_EXTENSION_REGISTRY_H_
+
+#include "upb/mem/arena.h"
+#include "upb/mini_table/extension.h"
+#include "upb/mini_table/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Extension registry: a dynamic data structure that stores a map of:
+ *   (upb_MiniTable, number) -> extension info
+ *
+ * upb_decode() uses upb_ExtensionRegistry to look up extensions while parsing
+ * binary format.
+ *
+ * upb_ExtensionRegistry is part of the mini-table (msglayout) family of
+ * objects. Like all mini-table objects, it is suitable for reflection-less
+ * builds that do not want to expose names into the binary.
+ *
+ * Unlike most mini-table types, upb_ExtensionRegistry requires dynamic memory
+ * allocation and dynamic initialization:
+ * * If reflection is being used, then upb_DefPool will construct an appropriate
+ *   upb_ExtensionRegistry automatically.
+ * * For a mini-table only build, the user must manually construct the
+ *   upb_ExtensionRegistry and populate it with all of the extensions the user
+ * cares about.
+ * * A third alternative is to manually unpack relevant extensions after the
+ *   main parse is complete, similar to how Any works. This is perhaps the
+ *   nicest solution from the perspective of reducing dependencies, avoiding
+ *   dynamic memory allocation, and avoiding the need to parse uninteresting
+ *   extensions.  The downsides are:
+ *     (1) parse errors are not caught during the main parse
+ *     (2) the CPU hit of parsing comes during access, which could cause an
+ *         undesirable stutter in application performance.
+ *
+ * Users cannot directly get or put into this map. Users can only add the
+ * extensions from a generated module and pass the extension registry to the
+ * binary decoder.
+ *
+ * A upb_DefPool provides a upb_ExtensionRegistry, so any users who use
+ * reflection do not need to populate a upb_ExtensionRegistry directly.
+ */
+
+typedef struct upb_ExtensionRegistry upb_ExtensionRegistry;
+
+// Creates a upb_ExtensionRegistry in the given arena.
+// The arena must outlive any use of the extreg.
+UPB_API upb_ExtensionRegistry* upb_ExtensionRegistry_New(upb_Arena* arena);
+
+UPB_API bool upb_ExtensionRegistry_Add(upb_ExtensionRegistry* r,
+                                       const upb_MiniTableExtension* e);
+
+// Adds the given extension info for the array |e| of size |count| into the
+// registry. If there are any errors, the entire array is backed out.
+// The extensions must outlive the registry.
+// Possible errors include OOM or an extension number that already exists.
+// TODO: There is currently no way to know the exact reason for failure.
+bool upb_ExtensionRegistry_AddArray(upb_ExtensionRegistry* r,
+                                    const upb_MiniTableExtension** e,
+                                    size_t count);
+
+// Looks up the extension (if any) defined for message type |t| and field
+// number |num|. Returns the extension if found, otherwise NULL.
+UPB_API const upb_MiniTableExtension* upb_ExtensionRegistry_Lookup(
+    const upb_ExtensionRegistry* r, const upb_MiniTable* t, uint32_t num);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_EXTENSION_REGISTRY_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/field.h

@@ -0,0 +1,98 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_FIELD_H_
+#define UPB_MINI_TABLE_FIELD_H_
+
+#include "upb/mini_table/internal/field.h"
+#include "upb/mini_table/internal/message.h"
+#include "upb/mini_table/internal/sub.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct upb_MiniTableField upb_MiniTableField;
+
+UPB_API_INLINE upb_FieldType
+upb_MiniTableField_Type(const upb_MiniTableField* field) {
+  if (field->mode & kUpb_LabelFlags_IsAlternate) {
+    if (field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Int32) {
+      return kUpb_FieldType_Enum;
+    } else if (field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Bytes) {
+      return kUpb_FieldType_String;
+    } else {
+      UPB_ASSERT(false);
+    }
+  }
+  return (upb_FieldType)field->UPB_PRIVATE(descriptortype);
+}
+
+UPB_API_INLINE upb_CType upb_MiniTableField_CType(const upb_MiniTableField* f) {
+  switch (upb_MiniTableField_Type(f)) {
+    case kUpb_FieldType_Double:
+      return kUpb_CType_Double;
+    case kUpb_FieldType_Float:
+      return kUpb_CType_Float;
+    case kUpb_FieldType_Int64:
+    case kUpb_FieldType_SInt64:
+    case kUpb_FieldType_SFixed64:
+      return kUpb_CType_Int64;
+    case kUpb_FieldType_Int32:
+    case kUpb_FieldType_SFixed32:
+    case kUpb_FieldType_SInt32:
+      return kUpb_CType_Int32;
+    case kUpb_FieldType_UInt64:
+    case kUpb_FieldType_Fixed64:
+      return kUpb_CType_UInt64;
+    case kUpb_FieldType_UInt32:
+    case kUpb_FieldType_Fixed32:
+      return kUpb_CType_UInt32;
+    case kUpb_FieldType_Enum:
+      return kUpb_CType_Enum;
+    case kUpb_FieldType_Bool:
+      return kUpb_CType_Bool;
+    case kUpb_FieldType_String:
+      return kUpb_CType_String;
+    case kUpb_FieldType_Bytes:
+      return kUpb_CType_Bytes;
+    case kUpb_FieldType_Group:
+    case kUpb_FieldType_Message:
+      return kUpb_CType_Message;
+  }
+  UPB_UNREACHABLE();
+}
+
+UPB_API_INLINE bool upb_MiniTableField_IsExtension(
+    const upb_MiniTableField* field) {
+  return field->mode & kUpb_LabelFlags_IsExtension;
+}
+
+UPB_API_INLINE bool upb_MiniTableField_IsClosedEnum(
+    const upb_MiniTableField* field) {
+  return field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Enum;
+}
+
+UPB_API_INLINE bool upb_MiniTableField_HasPresence(
+    const upb_MiniTableField* field) {
+  if (upb_MiniTableField_IsExtension(field)) {
+    return !upb_IsRepeatedOrMap(field);
+  } else {
+    return field->presence != 0;
+  }
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_FIELD_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/file.h

@@ -0,0 +1,15 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_FILE_H_
+#define UPB_MINI_TABLE_FILE_H_
+
+#include "upb/mini_table/internal/file.h"
+
+typedef struct upb_MiniTableFile upb_MiniTableFile;
+
+#endif /* UPB_MINI_TABLE_FILE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/enum.h

@@ -0,0 +1,58 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_ENUM_H_
+#define UPB_MINI_TABLE_INTERNAL_ENUM_H_
+
+#include <stdint.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_MiniTableEnum {
+  uint32_t mask_limit;   // Limit enum value that can be tested with mask.
+  uint32_t value_count;  // Number of values after the bitfield.
+  uint32_t data[];       // Bitmask + enumerated values follow.
+};
+
+typedef enum {
+  _kUpb_FastEnumCheck_ValueIsInEnum = 0,
+  _kUpb_FastEnumCheck_ValueIsNotInEnum = 1,
+  _kUpb_FastEnumCheck_CannotCheckFast = 2,
+} _kUpb_FastEnumCheck_Status;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE _kUpb_FastEnumCheck_Status _upb_MiniTable_CheckEnumValueFast(
+    const struct upb_MiniTableEnum* e, uint32_t val) {
+  if (UPB_UNLIKELY(val >= 64)) return _kUpb_FastEnumCheck_CannotCheckFast;
+  uint64_t mask = e->data[0] | ((uint64_t)e->data[1] << 32);
+  return (mask & (1ULL << val)) ? _kUpb_FastEnumCheck_ValueIsInEnum
+                                : _kUpb_FastEnumCheck_ValueIsNotInEnum;
+}
+
+UPB_INLINE bool _upb_MiniTable_CheckEnumValueSlow(
+    const struct upb_MiniTableEnum* e, uint32_t val) {
+  if (val < e->mask_limit) return e->data[val / 32] & (1ULL << (val % 32));
+  // OPT: binary search long lists?
+  const uint32_t* start = &e->data[e->mask_limit / 32];
+  const uint32_t* limit = &e->data[(e->mask_limit / 32) + e->value_count];
+  for (const uint32_t* p = start; p < limit; p++) {
+    if (*p == val) return true;
+  }
+  return false;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_INTERNAL_ENUM_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/extension.h

@@ -0,0 +1,27 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_EXTENSION_H_
+#define UPB_MINI_TABLE_INTERNAL_EXTENSION_H_
+
+#include "upb/mini_table/internal/field.h"
+#include "upb/mini_table/internal/sub.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_MiniTableExtension {
+  // Do not move this field. We need to be able to alias pointers.
+  struct upb_MiniTableField field;
+
+  const struct upb_MiniTable* extendee;
+  union upb_MiniTableSub sub;  // NULL unless submessage or proto2 enum
+};
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_INTERNAL_EXTENSION_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/field.h

@@ -0,0 +1,114 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_FIELD_H_
+#define UPB_MINI_TABLE_INTERNAL_FIELD_H_
+
+#include <stdint.h>
+
+#include "upb/base/descriptor_constants.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_MiniTableField {
+  uint32_t number;
+  uint16_t offset;
+  int16_t presence;       // If >0, hasbit_index.  If <0, ~oneof_index
+
+  // Indexes into `upb_MiniTable.subs`
+  // Will be set to `kUpb_NoSub` if `descriptortype` != MESSAGE/GROUP/ENUM
+  uint16_t UPB_PRIVATE(submsg_index);
+
+  uint8_t UPB_PRIVATE(descriptortype);
+
+  // upb_FieldMode | upb_LabelFlags | (upb_FieldRep << kUpb_FieldRep_Shift)
+  uint8_t mode;
+};
+
+#define kUpb_NoSub ((uint16_t)-1)
+
+typedef enum {
+  kUpb_FieldMode_Map = 0,
+  kUpb_FieldMode_Array = 1,
+  kUpb_FieldMode_Scalar = 2,
+} upb_FieldMode;
+
+// Mask to isolate the upb_FieldMode from field.mode.
+#define kUpb_FieldMode_Mask 3
+
+// Extra flags on the mode field.
+typedef enum {
+  kUpb_LabelFlags_IsPacked = 4,
+  kUpb_LabelFlags_IsExtension = 8,
+  // Indicates that this descriptor type is an "alternate type":
+  //   - for Int32, this indicates that the actual type is Enum (but was
+  //     rewritten to Int32 because it is an open enum that requires no check).
+  //   - for Bytes, this indicates that the actual type is String (but does
+  //     not require any UTF-8 check).
+  kUpb_LabelFlags_IsAlternate = 16,
+} upb_LabelFlags;
+
+// Note: we sort by this number when calculating layout order.
+typedef enum {
+  kUpb_FieldRep_1Byte = 0,
+  kUpb_FieldRep_4Byte = 1,
+  kUpb_FieldRep_StringView = 2,
+  kUpb_FieldRep_8Byte = 3,
+
+  kUpb_FieldRep_NativePointer =
+      UPB_SIZE(kUpb_FieldRep_4Byte, kUpb_FieldRep_8Byte),
+  kUpb_FieldRep_Max = kUpb_FieldRep_8Byte,
+} upb_FieldRep;
+
+#define kUpb_FieldRep_Shift 6
+
+UPB_INLINE upb_FieldRep
+_upb_MiniTableField_GetRep(const struct upb_MiniTableField* field) {
+  return (upb_FieldRep)(field->mode >> kUpb_FieldRep_Shift);
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE upb_FieldMode
+upb_FieldMode_Get(const struct upb_MiniTableField* field) {
+  return (upb_FieldMode)(field->mode & 3);
+}
+
+UPB_INLINE void _upb_MiniTableField_CheckIsArray(
+    const struct upb_MiniTableField* field) {
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer);
+  UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Array);
+  UPB_ASSUME(field->presence == 0);
+}
+
+UPB_INLINE void _upb_MiniTableField_CheckIsMap(
+    const struct upb_MiniTableField* field) {
+  UPB_ASSUME(_upb_MiniTableField_GetRep(field) == kUpb_FieldRep_NativePointer);
+  UPB_ASSUME(upb_FieldMode_Get(field) == kUpb_FieldMode_Map);
+  UPB_ASSUME(field->presence == 0);
+}
+
+UPB_INLINE bool upb_IsRepeatedOrMap(const struct upb_MiniTableField* field) {
+  // This works because upb_FieldMode has no value 3.
+  return !(field->mode & kUpb_FieldMode_Scalar);
+}
+
+UPB_INLINE bool upb_IsSubMessage(const struct upb_MiniTableField* field) {
+  return field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Message ||
+         field->UPB_PRIVATE(descriptortype) == kUpb_FieldType_Group;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_INTERNAL_FIELD_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/file.h

@@ -0,0 +1,29 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_FILE_H_
+#define UPB_MINI_TABLE_INTERNAL_FILE_H_
+
+#include "upb/mini_table/internal/enum.h"
+#include "upb/mini_table/internal/extension.h"
+#include "upb/mini_table/internal/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_MiniTableFile {
+  const struct upb_MiniTable** msgs;
+  const struct upb_MiniTableEnum** enums;
+  const struct upb_MiniTableExtension** exts;
+  int msg_count;
+  int enum_count;
+  int ext_count;
+};
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_INTERNAL_FILE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/message.h

@@ -0,0 +1,88 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_INTERNAL_MESSAGE_H_
+#define UPB_MINI_TABLE_INTERNAL_MESSAGE_H_
+
+#include "upb/message/types.h"
+#include "upb/mini_table/internal/field.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+struct upb_Decoder;
+typedef const char* _upb_FieldParser(struct upb_Decoder* d, const char* ptr,
+                                     upb_Message* msg, intptr_t table,
+                                     uint64_t hasbits, uint64_t data);
+typedef struct {
+  uint64_t field_data;
+  _upb_FieldParser* field_parser;
+} _upb_FastTable_Entry;
+
+typedef enum {
+  kUpb_ExtMode_NonExtendable = 0,  // Non-extendable message.
+  kUpb_ExtMode_Extendable = 1,     // Normal extendable message.
+  kUpb_ExtMode_IsMessageSet = 2,   // MessageSet message.
+  kUpb_ExtMode_IsMessageSet_ITEM =
+      3,  // MessageSet item (temporary only, see decode.c)
+
+  // During table building we steal a bit to indicate that the message is a map
+  // entry.  *Only* used during table building!
+  kUpb_ExtMode_IsMapEntry = 4,
+} upb_ExtMode;
+
+union upb_MiniTableSub;
+
+// upb_MiniTable represents the memory layout of a given upb_MessageDef.
+// The members are public so generated code can initialize them,
+// but users MUST NOT directly read or write any of its members.
+struct upb_MiniTable {
+  const union upb_MiniTableSub* subs;
+  const struct upb_MiniTableField* fields;
+
+  // Must be aligned to sizeof(void*). Doesn't include internal members like
+  // unknown fields, extension dict, pointer to msglayout, etc.
+  uint16_t size;
+
+  uint16_t field_count;
+  uint8_t ext;  // upb_ExtMode, declared as uint8_t so sizeof(ext) == 1
+  uint8_t dense_below;
+  uint8_t table_mask;
+  uint8_t required_count;  // Required fields have the lowest hasbits.
+
+  // To statically initialize the tables of variable length, we need a flexible
+  // array member, and we need to compile in gnu99 mode (constant initialization
+  // of flexible array members is a GNU extension, not in C99 unfortunately.
+  _upb_FastTable_Entry fasttable[];
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// A MiniTable for an empty message, used for unlinked sub-messages.
+extern const struct upb_MiniTable _kUpb_MiniTable_Empty;
+
+// Computes a bitmask in which the |l->required_count| lowest bits are set,
+// except that we skip the lowest bit (because upb never uses hasbit 0).
+//
+// Sample output:
+//    requiredmask(1) => 0b10 (0x2)
+//    requiredmask(5) => 0b111110 (0x3e)
+UPB_INLINE uint64_t upb_MiniTable_requiredmask(const struct upb_MiniTable* l) {
+  int n = l->required_count;
+  assert(0 < n && n <= 63);
+  return ((1ULL << n) - 1) << 1;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_INTERNAL_MESSAGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/internal/sub.h

@@ -0,0 +1,18 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+#ifndef UPB_MINI_TABLE_INTERNAL_SUB_H_
+#define UPB_MINI_TABLE_INTERNAL_SUB_H_
+
+#include "upb/mini_table/internal/enum.h"
+#include "upb/mini_table/internal/message.h"
+
+union upb_MiniTableSub {
+  const struct upb_MiniTable* submsg;
+  const struct upb_MiniTableEnum* subenum;
+};
+
+#endif /* UPB_MINI_TABLE_INTERNAL_SUB_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/message.h

@@ -0,0 +1,85 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_MESSAGE_H_
+#define UPB_MINI_TABLE_MESSAGE_H_
+
+#include "upb/mini_table/enum.h"
+#include "upb/mini_table/field.h"
+#include "upb/mini_table/internal/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct upb_MiniTable upb_MiniTable;
+
+UPB_API const upb_MiniTableField* upb_MiniTable_FindFieldByNumber(
+    const upb_MiniTable* table, uint32_t number);
+
+UPB_API_INLINE const upb_MiniTableField* upb_MiniTable_GetFieldByIndex(
+    const upb_MiniTable* t, uint32_t index) {
+  return &t->fields[index];
+}
+
+// Returns the MiniTable for this message field.  If the field is unlinked,
+// returns NULL.
+UPB_API_INLINE const upb_MiniTable* upb_MiniTable_GetSubMessageTable(
+    const upb_MiniTable* mini_table, const upb_MiniTableField* field) {
+  UPB_ASSERT(upb_MiniTableField_CType(field) == kUpb_CType_Message);
+  const upb_MiniTable* ret =
+      mini_table->subs[field->UPB_PRIVATE(submsg_index)].submsg;
+  UPB_ASSUME(ret);
+  return ret == &_kUpb_MiniTable_Empty ? NULL : ret;
+}
+
+// Returns the MiniTableEnum for this enum field.  If the field is unlinked,
+// returns NULL.
+UPB_API_INLINE const upb_MiniTableEnum* upb_MiniTable_GetSubEnumTable(
+    const upb_MiniTable* mini_table, const upb_MiniTableField* field) {
+  UPB_ASSERT(upb_MiniTableField_CType(field) == kUpb_CType_Enum);
+  return mini_table->subs[field->UPB_PRIVATE(submsg_index)].subenum;
+}
+
+// Returns true if this MiniTable field is linked to a MiniTable for the
+// sub-message.
+UPB_API_INLINE bool upb_MiniTable_MessageFieldIsLinked(
+    const upb_MiniTable* mini_table, const upb_MiniTableField* field) {
+  return upb_MiniTable_GetSubMessageTable(mini_table, field) != NULL;
+}
+
+// If this field is in a oneof, returns the first field in the oneof.
+//
+// Otherwise returns NULL.
+//
+// Usage:
+//   const upb_MiniTableField* field = upb_MiniTable_GetOneof(m, f);
+//   do {
+//       ..
+//   } while (upb_MiniTable_NextOneofField(m, &field);
+//
+const upb_MiniTableField* upb_MiniTable_GetOneof(const upb_MiniTable* m,
+                                                 const upb_MiniTableField* f);
+
+// Iterates to the next field in the oneof. If this is the last field in the
+// oneof, returns false. The ordering of fields in the oneof is not
+// guaranteed.
+// REQUIRES: |f| is the field initialized by upb_MiniTable_GetOneof and updated
+//           by prior upb_MiniTable_NextOneofField calls.
+bool upb_MiniTable_NextOneofField(const upb_MiniTable* m,
+                                  const upb_MiniTableField** f);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_MINI_TABLE_MESSAGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/mini_table/sub.h

@@ -0,0 +1,15 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_MINI_TABLE_SUB_H_
+#define UPB_MINI_TABLE_SUB_H_
+
+#include "upb/mini_table/internal/sub.h"
+
+typedef union upb_MiniTableSub upb_MiniTableSub;
+
+#endif /* UPB_MINI_TABLE_INTERNAL_SUB_H_ */

Pods/gRPC-C++/third_party/upb/upb/port/atomic.h

@@ -0,0 +1,83 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_PORT_ATOMIC_H_
+#define UPB_PORT_ATOMIC_H_
+
+#include "upb/port/def.inc"
+
+#ifdef UPB_USE_C11_ATOMICS
+
+// IWYU pragma: begin_exports
+#include <stdatomic.h>
+#include <stdbool.h>
+// IWYU pragma: end_exports
+
+#define upb_Atomic_Init(addr, val) atomic_init(addr, val)
+#define upb_Atomic_Load(addr, order) atomic_load_explicit(addr, order)
+#define upb_Atomic_Store(addr, val, order) \
+  atomic_store_explicit(addr, val, order)
+#define upb_Atomic_Add(addr, val, order) \
+  atomic_fetch_add_explicit(addr, val, order)
+#define upb_Atomic_Sub(addr, val, order) \
+  atomic_fetch_sub_explicit(addr, val, order)
+#define upb_Atomic_Exchange(addr, val, order) \
+  atomic_exchange_explicit(addr, val, order)
+#define upb_Atomic_CompareExchangeStrong(addr, expected, desired,      \
+                                         success_order, failure_order) \
+  atomic_compare_exchange_strong_explicit(addr, expected, desired,     \
+                                          success_order, failure_order)
+#define upb_Atomic_CompareExchangeWeak(addr, expected, desired, success_order, \
+                                       failure_order)                          \
+  atomic_compare_exchange_weak_explicit(addr, expected, desired,               \
+                                        success_order, failure_order)
+
+#else  // !UPB_USE_C11_ATOMICS
+
+#include <string.h>
+
+#define upb_Atomic_Init(addr, val) (*addr = val)
+#define upb_Atomic_Load(addr, order) (*addr)
+#define upb_Atomic_Store(addr, val, order) (*(addr) = val)
+#define upb_Atomic_Add(addr, val, order) (*(addr) += val)
+#define upb_Atomic_Sub(addr, val, order) (*(addr) -= val)
+
+UPB_INLINE void* _upb_NonAtomic_Exchange(void* addr, void* value) {
+  void* old;
+  memcpy(&old, addr, sizeof(value));
+  memcpy(addr, &value, sizeof(value));
+  return old;
+}
+
+#define upb_Atomic_Exchange(addr, val, order) _upb_NonAtomic_Exchange(addr, val)
+
+// `addr` and `expected` are logically double pointers.
+UPB_INLINE bool _upb_NonAtomic_CompareExchangeStrongP(void* addr,
+                                                      void* expected,
+                                                      void* desired) {
+  if (memcmp(addr, expected, sizeof(desired)) == 0) {
+    memcpy(addr, &desired, sizeof(desired));
+    return true;
+  } else {
+    memcpy(expected, addr, sizeof(desired));
+    return false;
+  }
+}
+
+#define upb_Atomic_CompareExchangeStrong(addr, expected, desired,      \
+                                         success_order, failure_order) \
+  _upb_NonAtomic_CompareExchangeStrongP((void*)addr, (void*)expected,  \
+                                        (void*)desired)
+#define upb_Atomic_CompareExchangeWeak(addr, expected, desired, success_order, \
+                                       failure_order)                          \
+  upb_Atomic_CompareExchangeStrong(addr, expected, desired, 0, 0)
+
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_PORT_ATOMIC_H_

Pods/gRPC-C++/third_party/upb/upb/port/def.inc

@@ -0,0 +1,328 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/*
+ * This is where we define internal portability macros used across upb.
+ *
+ * All of these macros are undef'd in undef.inc to avoid leaking them to users.
+ *
+ * The correct usage is:
+ *
+ *   #include "upb/foobar.h"
+ *   #include "upb/baz.h"
+ *
+ *   // MUST be last included header.
+ *   #include "upb/port/def.inc"
+ *
+ *   // Code for this file.
+ *   // <...>
+ *
+ *   // Can be omitted for .c files, required for .h.
+ *   #include "upb/port/undef.inc"
+ *
+ * This file is private and must not be included by users!
+ */
+
+#if !((defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \
+      (defined(__cplusplus) && __cplusplus >= 201402L) ||           \
+      (defined(_MSC_VER) && _MSC_VER >= 1900))
+#error upb requires C99 or C++14 or MSVC >= 2015.
+#endif
+
+// Portable check for GCC minimum version:
+// https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html
+#if defined(__GNUC__) && defined(__GNUC_MINOR__) && defined(__GNUC_PATCHLEVEL__)
+#define UPB_GNUC_MIN(x, y) \
+  (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
+#else
+#define UPB_GNUC_MIN(x, y) 0
+#endif
+
+#include <assert.h>
+#include <setjmp.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+
+#ifndef UINTPTR_MAX
+Error, UINTPTR_MAX is undefined
+#endif
+
+#if UINTPTR_MAX == 0xffffffff
+#define UPB_SIZE(size32, size64) size32
+#else
+#define UPB_SIZE(size32, size64) size64
+#endif
+
+/* If we always read/write as a consistent type to each address, this shouldn't
+ * violate aliasing.
+ */
+#define UPB_PTR_AT(msg, ofs, type) ((type*)((char*)(msg) + (ofs)))
+
+#define UPB_MAPTYPE_STRING 0
+
+// UPB_EXPORT: always generate a public symbol.
+#if defined(__GNUC__) || defined(__clang__)
+#define UPB_EXPORT __attribute__((visibility("default"))) __attribute__((used))
+#else
+#define UPB_EXPORT
+#endif
+
+// UPB_INLINE: inline if possible, emit standalone code if required.
+#ifdef __cplusplus
+#define UPB_INLINE inline
+#elif defined (__GNUC__) || defined(__clang__)
+#define UPB_INLINE static __inline__
+#else
+#define UPB_INLINE static
+#endif
+
+#ifdef UPB_BUILD_API
+#define UPB_API UPB_EXPORT
+#define UPB_API_INLINE UPB_EXPORT
+#else
+#define UPB_API
+#define UPB_API_INLINE UPB_INLINE
+#endif
+
+#define UPB_MALLOC_ALIGN 8
+#define UPB_ALIGN_UP(size, align) (((size) + (align) - 1) / (align) * (align))
+#define UPB_ALIGN_DOWN(size, align) ((size) / (align) * (align))
+#define UPB_ALIGN_MALLOC(size) UPB_ALIGN_UP(size, UPB_MALLOC_ALIGN)
+#ifdef __clang__
+#define UPB_ALIGN_OF(type) _Alignof(type)
+#else
+#define UPB_ALIGN_OF(type) offsetof (struct { char c; type member; }, member)
+#endif
+
+// Hints to the compiler about likely/unlikely branches.
+#if defined (__GNUC__) || defined(__clang__)
+#define UPB_LIKELY(x) __builtin_expect((bool)(x), 1)
+#define UPB_UNLIKELY(x) __builtin_expect((bool)(x), 0)
+#else
+#define UPB_LIKELY(x) (x)
+#define UPB_UNLIKELY(x) (x)
+#endif
+
+// Macros for function attributes on compilers that support them.
+#ifdef __GNUC__
+#define UPB_FORCEINLINE __inline__ __attribute__((always_inline))
+#define UPB_NOINLINE __attribute__((noinline))
+#define UPB_NORETURN __attribute__((__noreturn__))
+#define UPB_PRINTF(str, first_vararg) __attribute__((format (printf, str, first_vararg)))
+#elif defined(_MSC_VER)
+#define UPB_NOINLINE
+#define UPB_FORCEINLINE
+#define UPB_NORETURN __declspec(noreturn)
+#define UPB_PRINTF(str, first_vararg)
+#else  /* !defined(__GNUC__) */
+#define UPB_FORCEINLINE
+#define UPB_NOINLINE
+#define UPB_NORETURN
+#define UPB_PRINTF(str, first_vararg)
+#endif
+
+#define UPB_MAX(x, y) ((x) > (y) ? (x) : (y))
+#define UPB_MIN(x, y) ((x) < (y) ? (x) : (y))
+
+#define UPB_UNUSED(var) (void)var
+
+// UPB_ASSUME(): in release mode, we tell the compiler to assume this is true.
+#ifdef NDEBUG
+#ifdef __GNUC__
+#define UPB_ASSUME(expr) if (!(expr)) __builtin_unreachable()
+#elif defined _MSC_VER
+#define UPB_ASSUME(expr) if (!(expr)) __assume(0)
+#else
+#define UPB_ASSUME(expr) do {} while (false && (expr))
+#endif
+#else
+#define UPB_ASSUME(expr) assert(expr)
+#endif
+
+/* UPB_ASSERT(): in release mode, we use the expression without letting it be
+ * evaluated.  This prevents "unused variable" warnings. */
+#ifdef NDEBUG
+#define UPB_ASSERT(expr) do {} while (false && (expr))
+#else
+#define UPB_ASSERT(expr) assert(expr)
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define UPB_UNREACHABLE() do { assert(0); __builtin_unreachable(); } while(0)
+#elif defined(_MSC_VER)
+#define UPB_UNREACHABLE() \
+  do {                    \
+    assert(0);            \
+    __assume(0);          \
+  } while (0)
+#else
+#define UPB_UNREACHABLE() do { assert(0); } while(0)
+#endif
+
+/* UPB_SETJMP() / UPB_LONGJMP(): avoid setting/restoring signal mask. */
+#ifdef __APPLE__
+#define UPB_SETJMP(buf) _setjmp(buf)
+#define UPB_LONGJMP(buf, val) _longjmp(buf, val)
+#else
+#define UPB_SETJMP(buf) setjmp(buf)
+#define UPB_LONGJMP(buf, val) longjmp(buf, val)
+#endif
+
+#ifdef __GNUC__
+#define UPB_USE_C11_ATOMICS
+#define UPB_ATOMIC(T) _Atomic(T)
+#else
+#define UPB_ATOMIC(T) T
+#endif
+
+/* UPB_PTRADD(ptr, ofs): add pointer while avoiding "NULL + 0" UB */
+#define UPB_PTRADD(ptr, ofs) ((ofs) ? (ptr) + (ofs) : (ptr))
+
+#define UPB_PRIVATE(x) x##_dont_copy_me__upb_internal_use_only
+
+/* Configure whether fasttable is switched on or not. *************************/
+
+#ifdef __has_attribute
+#define UPB_HAS_ATTRIBUTE(x) __has_attribute(x)
+#else
+#define UPB_HAS_ATTRIBUTE(x) 0
+#endif
+
+#if UPB_HAS_ATTRIBUTE(musttail)
+#define UPB_MUSTTAIL __attribute__((musttail))
+#else
+#define UPB_MUSTTAIL
+#endif
+
+#undef UPB_HAS_ATTRIBUTE
+
+/* This check is not fully robust: it does not require that we have "musttail"
+ * support available. We need tail calls to avoid consuming arbitrary amounts
+ * of stack space.
+ *
+ * GCC/Clang can mostly be trusted to generate tail calls as long as
+ * optimization is enabled, but, debug builds will not generate tail calls
+ * unless "musttail" is available.
+ *
+ * We should probably either:
+ *   1. require that the compiler supports musttail.
+ *   2. add some fallback code for when musttail isn't available (ie. return
+ *      instead of tail calling). This is safe and portable, but this comes at
+ *      a CPU cost.
+ */
+#if (defined(__x86_64__) || defined(__aarch64__)) && defined(__GNUC__)
+#define UPB_FASTTABLE_SUPPORTED 1
+#else
+#define UPB_FASTTABLE_SUPPORTED 0
+#endif
+
+/* define UPB_ENABLE_FASTTABLE to force fast table support.
+ * This is useful when we want to ensure we are really getting fasttable,
+ * for example for testing or benchmarking. */
+#if defined(UPB_ENABLE_FASTTABLE)
+#if !UPB_FASTTABLE_SUPPORTED
+#error fasttable is x86-64/ARM64 only and requires GCC or Clang.
+#endif
+#define UPB_FASTTABLE 1
+/* Define UPB_TRY_ENABLE_FASTTABLE to use fasttable if possible.
+ * This is useful for releasing code that might be used on multiple platforms,
+ * for example the PHP or Ruby C extensions. */
+#elif defined(UPB_TRY_ENABLE_FASTTABLE)
+#define UPB_FASTTABLE UPB_FASTTABLE_SUPPORTED
+#else
+#define UPB_FASTTABLE 0
+#endif
+
+/* UPB_FASTTABLE_INIT() allows protos compiled for fasttable to gracefully
+ * degrade to non-fasttable if the runtime or platform do not support it. */
+#if !UPB_FASTTABLE
+#define UPB_FASTTABLE_INIT(...)
+#define UPB_FASTTABLE_MASK(mask) -1
+#else
+#define UPB_FASTTABLE_INIT(...) __VA_ARGS__
+#define UPB_FASTTABLE_MASK(mask) mask
+#endif
+
+#undef UPB_FASTTABLE_SUPPORTED
+
+/* ASAN poisoning (for arena).
+ * If using UPB from an interpreted language like Ruby, a build of the
+ * interpreter compiled with ASAN enabled must be used in order to get sane and
+ * expected behavior.
+ */
+
+/* Due to preprocessor limitations, the conditional logic for setting
+ * UPN_CLANG_ASAN below cannot be consolidated into a portable one-liner.
+ * See https://gcc.gnu.org/onlinedocs/cpp/_005f_005fhas_005fattribute.html.
+ */
+#if defined(__has_feature)
+#if __has_feature(address_sanitizer)
+#define UPB_CLANG_ASAN 1
+#else
+#define UPB_CLANG_ASAN 0
+#endif
+#else
+#define UPB_CLANG_ASAN 0
+#endif
+
+#if defined(__SANITIZE_ADDRESS__) || UPB_CLANG_ASAN
+#define UPB_ASAN 1
+#define UPB_ASAN_GUARD_SIZE 32
+#ifdef __cplusplus
+    extern "C" {
+#endif
+void __asan_poison_memory_region(void const volatile *addr, size_t size);
+void __asan_unpoison_memory_region(void const volatile *addr, size_t size);
+#ifdef __cplusplus
+}  /* extern "C" */
+#endif
+#define UPB_POISON_MEMORY_REGION(addr, size) \
+  __asan_poison_memory_region((addr), (size))
+#define UPB_UNPOISON_MEMORY_REGION(addr, size) \
+  __asan_unpoison_memory_region((addr), (size))
+#else
+#define UPB_ASAN 0
+#define UPB_ASAN_GUARD_SIZE 0
+#define UPB_POISON_MEMORY_REGION(addr, size) \
+  ((void)(addr), (void)(size))
+#define UPB_UNPOISON_MEMORY_REGION(addr, size) \
+  ((void)(addr), (void)(size))
+#endif
+
+/* Disable proto2 arena behavior (TEMPORARY) **********************************/
+
+#ifdef UPB_DISABLE_PROTO2_ENUM_CHECKING
+#define UPB_TREAT_PROTO2_ENUMS_LIKE_PROTO3 1
+#else
+#define UPB_TREAT_PROTO2_ENUMS_LIKE_PROTO3 0
+#endif
+
+#if defined(__cplusplus)
+#if defined(__clang__) || UPB_GNUC_MIN(6, 0)
+// https://gcc.gnu.org/gcc-6/changes.html
+#if __cplusplus >= 201402L
+#define UPB_DEPRECATED [[deprecated]]
+#else
+#define UPB_DEPRECATED __attribute__((deprecated))
+#endif
+#else
+#define UPB_DEPRECATED
+#endif
+#else
+#define UPB_DEPRECATED
+#endif
+
+// begin:google_only
+// #define UPB_IS_GOOGLE3
+// end:google_only
+
+#if defined(UPB_IS_GOOGLE3) && !defined(UPB_BOOTSTRAP_STAGE0)
+#define UPB_DESC(sym) proto2_##sym
+#else
+#define UPB_DESC(sym) google_protobuf_##sym
+#endif

Pods/gRPC-C++/third_party/upb/upb/port/undef.inc

@@ -0,0 +1,55 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// This should #undef all macros #defined in def.inc
+
+#undef UPB_SIZE
+#undef UPB_PTR_AT
+#undef UPB_MAPTYPE_STRING
+#undef UPB_EXPORT
+#undef UPB_INLINE
+#undef UPB_API
+#undef UPB_API_INLINE
+#undef UPB_ALIGN_UP
+#undef UPB_ALIGN_DOWN
+#undef UPB_ALIGN_MALLOC
+#undef UPB_ALIGN_OF
+#undef UPB_MALLOC_ALIGN
+#undef UPB_LIKELY
+#undef UPB_UNLIKELY
+#undef UPB_FORCEINLINE
+#undef UPB_NOINLINE
+#undef UPB_NORETURN
+#undef UPB_PRINTF
+#undef UPB_MAX
+#undef UPB_MIN
+#undef UPB_UNUSED
+#undef UPB_ASSUME
+#undef UPB_ASSERT
+#undef UPB_UNREACHABLE
+#undef UPB_SETJMP
+#undef UPB_LONGJMP
+#undef UPB_PTRADD
+#undef UPB_MUSTTAIL
+#undef UPB_FASTTABLE_SUPPORTED
+#undef UPB_FASTTABLE_MASK
+#undef UPB_FASTTABLE
+#undef UPB_FASTTABLE_INIT
+#undef UPB_POISON_MEMORY_REGION
+#undef UPB_UNPOISON_MEMORY_REGION
+#undef UPB_ASAN
+#undef UPB_ASAN_GUARD_SIZE
+#undef UPB_CLANG_ASAN
+#undef UPB_TREAT_PROTO2_ENUMS_LIKE_PROTO3
+#undef UPB_DEPRECATED
+#undef UPB_GNUC_MIN
+#undef UPB_DESCRIPTOR_UPB_H_FILENAME
+#undef UPB_DESC
+#undef UPB_IS_GOOGLE3
+#undef UPB_ATOMIC
+#undef UPB_USE_C11_ATOMICS
+#undef UPB_PRIVATE

Pods/gRPC-C++/third_party/upb/upb/port/vsnprintf_compat.h

@@ -0,0 +1,30 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_PORT_VSNPRINTF_COMPAT_H_
+#define UPB_PORT_VSNPRINTF_COMPAT_H_
+
+// Must be last.
+#include "upb/port/def.inc"
+
+UPB_INLINE int _upb_vsnprintf(char* buf, size_t size, const char* fmt,
+                              va_list ap) {
+#if defined(__MINGW64__) || defined(__MINGW32__) || defined(_MSC_VER)
+  // The msvc runtime has a non-conforming vsnprintf() that requires the
+  // following compatibility code to become conformant.
+  int n = -1;
+  if (size != 0) n = _vsnprintf_s(buf, size, _TRUNCATE, fmt, ap);
+  if (n == -1) n = _vscprintf(fmt, ap);
+  return n;
+#else
+  return vsnprintf(buf, size, fmt, ap);
+#endif
+}
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_PORT_VSNPRINTF_COMPAT_H_

Pods/gRPC-C++/third_party/upb/upb/reflection/common.h

@@ -0,0 +1,51 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+// Declarations common to all public def types.
+
+#ifndef UPB_REFLECTION_COMMON_H_
+#define UPB_REFLECTION_COMMON_H_
+
+// begin:google_only
+// #ifndef UPB_BOOTSTRAP_STAGE0
+// #include "net/proto2/proto/descriptor.upb.h"
+// #else
+// #include "google/protobuf/descriptor.upb.h"
+// #endif
+// end:google_only
+
+// begin:github_only
+#include "google/protobuf/descriptor.upb.h"
+// end:github_only
+
+typedef enum {
+  kUpb_Syntax_Proto2 = 2,
+  kUpb_Syntax_Proto3 = 3,
+  kUpb_Syntax_Editions = 99
+} upb_Syntax;
+
+// Forward declarations for circular references.
+typedef struct upb_DefPool upb_DefPool;
+typedef struct upb_EnumDef upb_EnumDef;
+typedef struct upb_EnumReservedRange upb_EnumReservedRange;
+typedef struct upb_EnumValueDef upb_EnumValueDef;
+typedef struct upb_ExtensionRange upb_ExtensionRange;
+typedef struct upb_FieldDef upb_FieldDef;
+typedef struct upb_FileDef upb_FileDef;
+typedef struct upb_MessageDef upb_MessageDef;
+typedef struct upb_MessageReservedRange upb_MessageReservedRange;
+typedef struct upb_MethodDef upb_MethodDef;
+typedef struct upb_OneofDef upb_OneofDef;
+typedef struct upb_ServiceDef upb_ServiceDef;
+
+// EVERYTHING BELOW THIS LINE IS INTERNAL - DO NOT USE /////////////////////////
+
+typedef struct upb_DefBuilder upb_DefBuilder;
+
+#endif /* UPB_REFLECTION_COMMON_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/def.h

@@ -0,0 +1,24 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DEF_H_
+#define UPB_REFLECTION_DEF_H_
+
+// IWYU pragma: begin_exports
+#include "upb/reflection/def_pool.h"
+#include "upb/reflection/enum_def.h"
+#include "upb/reflection/enum_value_def.h"
+#include "upb/reflection/extension_range.h"
+#include "upb/reflection/field_def.h"
+#include "upb/reflection/file_def.h"
+#include "upb/reflection/message_def.h"
+#include "upb/reflection/method_def.h"
+#include "upb/reflection/oneof_def.h"
+#include "upb/reflection/service_def.h"
+// IWYU pragma: end_exports
+
+#endif /* UPB_REFLECTION_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/def.hpp

@@ -0,0 +1,605 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DEF_HPP_
+#define UPB_REFLECTION_DEF_HPP_
+
+#include <cstring>
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "upb/base/status.hpp"
+#include "upb/mem/arena.hpp"
+#include "upb/reflection/def.h"
+#include "upb/reflection/internal/def_pool.h"
+#include "upb/reflection/internal/enum_def.h"
+#include "upb/reflection/message.h"
+
+// Must be last
+#include "upb/port/def.inc"
+
+namespace upb {
+
+typedef upb_MessageValue MessageValue;
+
+class EnumDefPtr;
+class FileDefPtr;
+class MessageDefPtr;
+class OneofDefPtr;
+
+// A upb::FieldDefPtr describes a single field in a message.  It is most often
+// found as a part of a upb_MessageDef, but can also stand alone to represent
+// an extension.
+class FieldDefPtr {
+ public:
+  FieldDefPtr() : ptr_(nullptr) {}
+  explicit FieldDefPtr(const upb_FieldDef* ptr) : ptr_(ptr) {}
+
+  const upb_FieldDef* ptr() const { return ptr_; }
+
+  typedef upb_FieldType Type;
+  typedef upb_CType CType;
+  typedef upb_Label Label;
+
+  FileDefPtr file() const;
+  const char* full_name() const { return upb_FieldDef_FullName(ptr_); }
+
+  const upb_MiniTableField* mini_table() const {
+    return upb_FieldDef_MiniTable(ptr_);
+  }
+
+  const UPB_DESC(FieldOptions) * options() const {
+    return upb_FieldDef_Options(ptr_);
+  }
+
+  Type type() const { return upb_FieldDef_Type(ptr_); }
+  CType ctype() const { return upb_FieldDef_CType(ptr_); }
+  Label label() const { return upb_FieldDef_Label(ptr_); }
+  const char* name() const { return upb_FieldDef_Name(ptr_); }
+  const char* json_name() const { return upb_FieldDef_JsonName(ptr_); }
+  uint32_t number() const { return upb_FieldDef_Number(ptr_); }
+  bool is_extension() const { return upb_FieldDef_IsExtension(ptr_); }
+  bool is_required() const { return upb_FieldDef_IsRequired(ptr_); }
+  bool has_presence() const { return upb_FieldDef_HasPresence(ptr_); }
+
+  // For non-string, non-submessage fields, this indicates whether binary
+  // protobufs are encoded in packed or non-packed format.
+  //
+  // Note: this accessor reflects the fact that "packed" has different defaults
+  // depending on whether the proto is proto2 or proto3.
+  bool packed() const { return upb_FieldDef_IsPacked(ptr_); }
+
+  // An integer that can be used as an index into an array of fields for
+  // whatever message this field belongs to.  Guaranteed to be less than
+  // f->containing_type()->field_count().  May only be accessed once the def has
+  // been finalized.
+  uint32_t index() const { return upb_FieldDef_Index(ptr_); }
+
+  // The MessageDef to which this field belongs (for extensions, the extended
+  // message).
+  MessageDefPtr containing_type() const;
+
+  // For extensions, the message the extension is declared inside, or NULL if
+  // none.
+  MessageDefPtr extension_scope() const;
+
+  // The OneofDef to which this field belongs, or NULL if this field is not part
+  // of a oneof.
+  OneofDefPtr containing_oneof() const;
+  OneofDefPtr real_containing_oneof() const;
+
+  // Convenient field type tests.
+  bool IsSubMessage() const { return upb_FieldDef_IsSubMessage(ptr_); }
+  bool IsString() const { return upb_FieldDef_IsString(ptr_); }
+  bool IsSequence() const { return upb_FieldDef_IsRepeated(ptr_); }
+  bool IsPrimitive() const { return upb_FieldDef_IsPrimitive(ptr_); }
+  bool IsMap() const { return upb_FieldDef_IsMap(ptr_); }
+
+  MessageValue default_value() const { return upb_FieldDef_Default(ptr_); }
+
+  // Returns the enum or submessage def for this field, if any.  The field's
+  // type must match (ie. you may only call enum_subdef() for fields where
+  // type() == kUpb_CType_Enum).
+  EnumDefPtr enum_subdef() const;
+  MessageDefPtr message_type() const;
+
+  explicit operator bool() const { return ptr_ != nullptr; }
+
+  friend bool operator==(FieldDefPtr lhs, FieldDefPtr rhs) {
+    return lhs.ptr_ == rhs.ptr_;
+  }
+
+  friend bool operator!=(FieldDefPtr lhs, FieldDefPtr rhs) {
+    return !(lhs == rhs);
+  }
+
+ private:
+  const upb_FieldDef* ptr_;
+};
+
+// Class that represents a oneof.
+class OneofDefPtr {
+ public:
+  OneofDefPtr() : ptr_(nullptr) {}
+  explicit OneofDefPtr(const upb_OneofDef* ptr) : ptr_(ptr) {}
+
+  const upb_OneofDef* ptr() const { return ptr_; }
+  explicit operator bool() const { return ptr_ != nullptr; }
+
+  const UPB_DESC(OneofOptions) * options() const {
+    return upb_OneofDef_Options(ptr_);
+  }
+
+  // Returns the MessageDef that contains this OneofDef.
+  MessageDefPtr containing_type() const;
+
+  // Returns the name of this oneof.
+  const char* name() const { return upb_OneofDef_Name(ptr_); }
+  const char* full_name() const { return upb_OneofDef_FullName(ptr_); }
+
+  // Returns the number of fields in the oneof.
+  int field_count() const { return upb_OneofDef_FieldCount(ptr_); }
+  FieldDefPtr field(int i) const {
+    return FieldDefPtr(upb_OneofDef_Field(ptr_, i));
+  }
+
+  // Looks up by name.
+  FieldDefPtr FindFieldByName(const char* name, size_t len) const {
+    return FieldDefPtr(upb_OneofDef_LookupNameWithSize(ptr_, name, len));
+  }
+  FieldDefPtr FindFieldByName(const char* name) const {
+    return FieldDefPtr(upb_OneofDef_LookupName(ptr_, name));
+  }
+
+  template <class T>
+  FieldDefPtr FindFieldByName(const T& str) const {
+    return FindFieldByName(str.c_str(), str.size());
+  }
+
+  // Looks up by tag number.
+  FieldDefPtr FindFieldByNumber(uint32_t num) const {
+    return FieldDefPtr(upb_OneofDef_LookupNumber(ptr_, num));
+  }
+
+ private:
+  const upb_OneofDef* ptr_;
+};
+
+// Structure that describes a single .proto message type.
+class MessageDefPtr {
+ public:
+  MessageDefPtr() : ptr_(nullptr) {}
+  explicit MessageDefPtr(const upb_MessageDef* ptr) : ptr_(ptr) {}
+
+  const UPB_DESC(MessageOptions) * options() const {
+    return upb_MessageDef_Options(ptr_);
+  }
+
+  std::string MiniDescriptorEncode() const {
+    upb::Arena arena;
+    upb_StringView md;
+    upb_MessageDef_MiniDescriptorEncode(ptr_, arena.ptr(), &md);
+    return std::string(md.data, md.size);
+  }
+
+  const upb_MessageDef* ptr() const { return ptr_; }
+
+  FileDefPtr file() const;
+
+  const char* full_name() const { return upb_MessageDef_FullName(ptr_); }
+  const char* name() const { return upb_MessageDef_Name(ptr_); }
+
+  const upb_MiniTable* mini_table() const {
+    return upb_MessageDef_MiniTable(ptr_);
+  }
+
+  // The number of fields that belong to the MessageDef.
+  int field_count() const { return upb_MessageDef_FieldCount(ptr_); }
+  FieldDefPtr field(int i) const {
+    return FieldDefPtr(upb_MessageDef_Field(ptr_, i));
+  }
+
+  // The number of oneofs that belong to the MessageDef.
+  int oneof_count() const { return upb_MessageDef_OneofCount(ptr_); }
+  int real_oneof_count() const { return upb_MessageDef_RealOneofCount(ptr_); }
+  OneofDefPtr oneof(int i) const {
+    return OneofDefPtr(upb_MessageDef_Oneof(ptr_, i));
+  }
+
+  int enum_type_count() const { return upb_MessageDef_NestedEnumCount(ptr_); }
+  EnumDefPtr enum_type(int i) const;
+
+  int nested_message_count() const {
+    return upb_MessageDef_NestedMessageCount(ptr_);
+  }
+  MessageDefPtr nested_message(int i) const {
+    return MessageDefPtr(upb_MessageDef_NestedMessage(ptr_, i));
+  }
+
+  int nested_extension_count() const {
+    return upb_MessageDef_NestedExtensionCount(ptr_);
+  }
+  FieldDefPtr nested_extension(int i) const {
+    return FieldDefPtr(upb_MessageDef_NestedExtension(ptr_, i));
+  }
+
+  int extension_range_count() const {
+    return upb_MessageDef_ExtensionRangeCount(ptr_);
+  }
+
+  upb_Syntax syntax() const { return upb_MessageDef_Syntax(ptr_); }
+
+  // These return null pointers if the field is not found.
+  FieldDefPtr FindFieldByNumber(uint32_t number) const {
+    return FieldDefPtr(upb_MessageDef_FindFieldByNumber(ptr_, number));
+  }
+  FieldDefPtr FindFieldByName(const char* name, size_t len) const {
+    return FieldDefPtr(upb_MessageDef_FindFieldByNameWithSize(ptr_, name, len));
+  }
+  FieldDefPtr FindFieldByName(const char* name) const {
+    return FieldDefPtr(upb_MessageDef_FindFieldByName(ptr_, name));
+  }
+
+  template <class T>
+  FieldDefPtr FindFieldByName(const T& str) const {
+    return FindFieldByName(str.c_str(), str.size());
+  }
+
+  OneofDefPtr FindOneofByName(const char* name, size_t len) const {
+    return OneofDefPtr(upb_MessageDef_FindOneofByNameWithSize(ptr_, name, len));
+  }
+
+  OneofDefPtr FindOneofByName(const char* name) const {
+    return OneofDefPtr(upb_MessageDef_FindOneofByName(ptr_, name));
+  }
+
+  template <class T>
+  OneofDefPtr FindOneofByName(const T& str) const {
+    return FindOneofByName(str.c_str(), str.size());
+  }
+
+  // Is this message a map entry?
+  bool mapentry() const { return upb_MessageDef_IsMapEntry(ptr_); }
+
+  FieldDefPtr map_key() const {
+    if (!mapentry()) return FieldDefPtr();
+    return FieldDefPtr(upb_MessageDef_Field(ptr_, 0));
+  }
+
+  FieldDefPtr map_value() const {
+    if (!mapentry()) return FieldDefPtr();
+    return FieldDefPtr(upb_MessageDef_Field(ptr_, 1));
+  }
+
+  // Return the type of well known type message. kUpb_WellKnown_Unspecified for
+  // non-well-known message.
+  upb_WellKnown wellknowntype() const {
+    return upb_MessageDef_WellKnownType(ptr_);
+  }
+
+  explicit operator bool() const { return ptr_ != nullptr; }
+
+  friend bool operator==(MessageDefPtr lhs, MessageDefPtr rhs) {
+    return lhs.ptr_ == rhs.ptr_;
+  }
+
+  friend bool operator!=(MessageDefPtr lhs, MessageDefPtr rhs) {
+    return !(lhs == rhs);
+  }
+
+ private:
+  class FieldIter {
+   public:
+    explicit FieldIter(const upb_MessageDef* m, int i) : m_(m), i_(i) {}
+    void operator++() { i_++; }
+
+    FieldDefPtr operator*() {
+      return FieldDefPtr(upb_MessageDef_Field(m_, i_));
+    }
+
+    friend bool operator==(FieldIter lhs, FieldIter rhs) {
+      return lhs.i_ == rhs.i_;
+    }
+
+    friend bool operator!=(FieldIter lhs, FieldIter rhs) {
+      return !(lhs == rhs);
+    }
+
+   private:
+    const upb_MessageDef* m_;
+    int i_;
+  };
+
+  class FieldAccessor {
+   public:
+    explicit FieldAccessor(const upb_MessageDef* md) : md_(md) {}
+    FieldIter begin() { return FieldIter(md_, 0); }
+    FieldIter end() { return FieldIter(md_, upb_MessageDef_FieldCount(md_)); }
+
+   private:
+    const upb_MessageDef* md_;
+  };
+
+  class OneofIter {
+   public:
+    explicit OneofIter(const upb_MessageDef* m, int i) : m_(m), i_(i) {}
+    void operator++() { i_++; }
+
+    OneofDefPtr operator*() {
+      return OneofDefPtr(upb_MessageDef_Oneof(m_, i_));
+    }
+
+    friend bool operator==(OneofIter lhs, OneofIter rhs) {
+      return lhs.i_ == rhs.i_;
+    }
+
+    friend bool operator!=(OneofIter lhs, OneofIter rhs) {
+      return !(lhs == rhs);
+    }
+
+   private:
+    const upb_MessageDef* m_;
+    int i_;
+  };
+
+  class OneofAccessor {
+   public:
+    explicit OneofAccessor(const upb_MessageDef* md) : md_(md) {}
+    OneofIter begin() { return OneofIter(md_, 0); }
+    OneofIter end() { return OneofIter(md_, upb_MessageDef_OneofCount(md_)); }
+
+   private:
+    const upb_MessageDef* md_;
+  };
+
+ public:
+  FieldAccessor fields() const { return FieldAccessor(ptr()); }
+  OneofAccessor oneofs() const { return OneofAccessor(ptr()); }
+
+ private:
+  const upb_MessageDef* ptr_;
+};
+
+class EnumValDefPtr {
+ public:
+  EnumValDefPtr() : ptr_(nullptr) {}
+  explicit EnumValDefPtr(const upb_EnumValueDef* ptr) : ptr_(ptr) {}
+
+  const UPB_DESC(EnumValueOptions) * options() const {
+    return upb_EnumValueDef_Options(ptr_);
+  }
+
+  int32_t number() const { return upb_EnumValueDef_Number(ptr_); }
+  const char* full_name() const { return upb_EnumValueDef_FullName(ptr_); }
+  const char* name() const { return upb_EnumValueDef_Name(ptr_); }
+
+ private:
+  const upb_EnumValueDef* ptr_;
+};
+
+class EnumDefPtr {
+ public:
+  EnumDefPtr() : ptr_(nullptr) {}
+  explicit EnumDefPtr(const upb_EnumDef* ptr) : ptr_(ptr) {}
+
+  const UPB_DESC(EnumOptions) * options() const {
+    return upb_EnumDef_Options(ptr_);
+  }
+
+  const upb_MiniTableEnum* mini_table() const {
+    return _upb_EnumDef_MiniTable(ptr_);
+  }
+
+  std::string MiniDescriptorEncode() const {
+    upb::Arena arena;
+    upb_StringView md;
+    upb_EnumDef_MiniDescriptorEncode(ptr_, arena.ptr(), &md);
+    return std::string(md.data, md.size);
+  }
+
+  const upb_EnumDef* ptr() const { return ptr_; }
+  explicit operator bool() const { return ptr_ != nullptr; }
+
+  const char* full_name() const { return upb_EnumDef_FullName(ptr_); }
+  const char* name() const { return upb_EnumDef_Name(ptr_); }
+  bool is_closed() const { return upb_EnumDef_IsClosed(ptr_); }
+
+  // The value that is used as the default when no field default is specified.
+  // If not set explicitly, the first value that was added will be used.
+  // The default value must be a member of the enum.
+  // Requires that value_count() > 0.
+  int32_t default_value() const { return upb_EnumDef_Default(ptr_); }
+
+  // Returns the number of values currently defined in the enum.  Note that
+  // multiple names can refer to the same number, so this may be greater than
+  // the total number of unique numbers.
+  int value_count() const { return upb_EnumDef_ValueCount(ptr_); }
+  EnumValDefPtr value(int i) const {
+    return EnumValDefPtr(upb_EnumDef_Value(ptr_, i));
+  }
+
+  // Lookups from name to integer, returning true if found.
+  EnumValDefPtr FindValueByName(const char* name) const {
+    return EnumValDefPtr(upb_EnumDef_FindValueByName(ptr_, name));
+  }
+
+  // Finds the name corresponding to the given number, or NULL if none was
+  // found.  If more than one name corresponds to this number, returns the
+  // first one that was added.
+  EnumValDefPtr FindValueByNumber(int32_t num) const {
+    return EnumValDefPtr(upb_EnumDef_FindValueByNumber(ptr_, num));
+  }
+
+ private:
+  const upb_EnumDef* ptr_;
+};
+
+// Class that represents a .proto file with some things defined in it.
+//
+// Many users won't care about FileDefs, but they are necessary if you want to
+// read the values of file-level options.
+class FileDefPtr {
+ public:
+  explicit FileDefPtr(const upb_FileDef* ptr) : ptr_(ptr) {}
+
+  const UPB_DESC(FileOptions) * options() const {
+    return upb_FileDef_Options(ptr_);
+  }
+
+  const upb_FileDef* ptr() const { return ptr_; }
+
+  // Get/set name of the file (eg. "foo/bar.proto").
+  const char* name() const { return upb_FileDef_Name(ptr_); }
+
+  // Package name for definitions inside the file (eg. "foo.bar").
+  const char* package() const { return upb_FileDef_Package(ptr_); }
+
+  // Syntax for the file.  Defaults to proto2.
+  upb_Syntax syntax() const { return upb_FileDef_Syntax(ptr_); }
+
+  // Get the list of dependencies from the file.  These are returned in the
+  // order that they were added to the FileDefPtr.
+  int dependency_count() const { return upb_FileDef_DependencyCount(ptr_); }
+  FileDefPtr dependency(int index) const {
+    return FileDefPtr(upb_FileDef_Dependency(ptr_, index));
+  }
+
+  int public_dependency_count() const {
+    return upb_FileDef_PublicDependencyCount(ptr_);
+  }
+  FileDefPtr public_dependency(int index) const {
+    return FileDefPtr(upb_FileDef_PublicDependency(ptr_, index));
+  }
+
+  int toplevel_enum_count() const {
+    return upb_FileDef_TopLevelEnumCount(ptr_);
+  }
+  EnumDefPtr toplevel_enum(int index) const {
+    return EnumDefPtr(upb_FileDef_TopLevelEnum(ptr_, index));
+  }
+
+  int toplevel_message_count() const {
+    return upb_FileDef_TopLevelMessageCount(ptr_);
+  }
+  MessageDefPtr toplevel_message(int index) const {
+    return MessageDefPtr(upb_FileDef_TopLevelMessage(ptr_, index));
+  }
+
+  int toplevel_extension_count() const {
+    return upb_FileDef_TopLevelExtensionCount(ptr_);
+  }
+  FieldDefPtr toplevel_extension(int index) const {
+    return FieldDefPtr(upb_FileDef_TopLevelExtension(ptr_, index));
+  }
+
+  explicit operator bool() const { return ptr_ != nullptr; }
+
+  friend bool operator==(FileDefPtr lhs, FileDefPtr rhs) {
+    return lhs.ptr_ == rhs.ptr_;
+  }
+
+  friend bool operator!=(FileDefPtr lhs, FileDefPtr rhs) {
+    return !(lhs == rhs);
+  }
+
+ private:
+  const upb_FileDef* ptr_;
+};
+
+// Non-const methods in upb::DefPool are NOT thread-safe.
+class DefPool {
+ public:
+  DefPool() : ptr_(upb_DefPool_New(), upb_DefPool_Free) {}
+  explicit DefPool(upb_DefPool* s) : ptr_(s, upb_DefPool_Free) {}
+
+  const upb_DefPool* ptr() const { return ptr_.get(); }
+  upb_DefPool* ptr() { return ptr_.get(); }
+
+  // Finds an entry in the symbol table with this exact name.  If not found,
+  // returns NULL.
+  MessageDefPtr FindMessageByName(const char* sym) const {
+    return MessageDefPtr(upb_DefPool_FindMessageByName(ptr_.get(), sym));
+  }
+
+  EnumDefPtr FindEnumByName(const char* sym) const {
+    return EnumDefPtr(upb_DefPool_FindEnumByName(ptr_.get(), sym));
+  }
+
+  FileDefPtr FindFileByName(const char* name) const {
+    return FileDefPtr(upb_DefPool_FindFileByName(ptr_.get(), name));
+  }
+
+  FieldDefPtr FindExtensionByName(const char* name) const {
+    return FieldDefPtr(upb_DefPool_FindExtensionByName(ptr_.get(), name));
+  }
+
+  void _SetPlatform(upb_MiniTablePlatform platform) {
+    _upb_DefPool_SetPlatform(ptr_.get(), platform);
+  }
+
+  // TODO: iteration?
+
+  // Adds the given serialized FileDescriptorProto to the pool.
+  FileDefPtr AddFile(const UPB_DESC(FileDescriptorProto) * file_proto,
+                     Status* status) {
+    return FileDefPtr(
+        upb_DefPool_AddFile(ptr_.get(), file_proto, status->ptr()));
+  }
+
+ private:
+  std::unique_ptr<upb_DefPool, decltype(&upb_DefPool_Free)> ptr_;
+};
+
+// TODO: This typedef is deprecated. Delete it.
+using SymbolTable = DefPool;
+
+inline FileDefPtr FieldDefPtr::file() const {
+  return FileDefPtr(upb_FieldDef_File(ptr_));
+}
+
+inline FileDefPtr MessageDefPtr::file() const {
+  return FileDefPtr(upb_MessageDef_File(ptr_));
+}
+
+inline EnumDefPtr MessageDefPtr::enum_type(int i) const {
+  return EnumDefPtr(upb_MessageDef_NestedEnum(ptr_, i));
+}
+
+inline MessageDefPtr FieldDefPtr::message_type() const {
+  return MessageDefPtr(upb_FieldDef_MessageSubDef(ptr_));
+}
+
+inline MessageDefPtr FieldDefPtr::containing_type() const {
+  return MessageDefPtr(upb_FieldDef_ContainingType(ptr_));
+}
+
+inline MessageDefPtr FieldDefPtr::extension_scope() const {
+  return MessageDefPtr(upb_FieldDef_ExtensionScope(ptr_));
+}
+
+inline MessageDefPtr OneofDefPtr::containing_type() const {
+  return MessageDefPtr(upb_OneofDef_ContainingType(ptr_));
+}
+
+inline OneofDefPtr FieldDefPtr::containing_oneof() const {
+  return OneofDefPtr(upb_FieldDef_ContainingOneof(ptr_));
+}
+
+inline OneofDefPtr FieldDefPtr::real_containing_oneof() const {
+  return OneofDefPtr(upb_FieldDef_RealContainingOneof(ptr_));
+}
+
+inline EnumDefPtr FieldDefPtr::enum_subdef() const {
+  return EnumDefPtr(upb_FieldDef_EnumSubDef(ptr_));
+}
+
+}  // namespace upb
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_REFLECTION_DEF_HPP_

Pods/gRPC-C++/third_party/upb/upb/reflection/def_pool.h

@@ -0,0 +1,87 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_DEF_POOL_H_
+#define UPB_REFLECTION_DEF_POOL_H_
+
+#include "upb/base/status.h"
+#include "upb/base/string_view.h"
+#include "upb/reflection/common.h"
+#include "upb/reflection/def_type.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_API void upb_DefPool_Free(upb_DefPool* s);
+
+UPB_API upb_DefPool* upb_DefPool_New(void);
+
+UPB_API const upb_MessageDef* upb_DefPool_FindMessageByName(
+    const upb_DefPool* s, const char* sym);
+
+const upb_MessageDef* upb_DefPool_FindMessageByNameWithSize(
+    const upb_DefPool* s, const char* sym, size_t len);
+
+UPB_API const upb_EnumDef* upb_DefPool_FindEnumByName(const upb_DefPool* s,
+                                                      const char* sym);
+
+const upb_EnumValueDef* upb_DefPool_FindEnumByNameval(const upb_DefPool* s,
+                                                      const char* sym);
+
+const upb_FileDef* upb_DefPool_FindFileByName(const upb_DefPool* s,
+                                              const char* name);
+
+const upb_FileDef* upb_DefPool_FindFileByNameWithSize(const upb_DefPool* s,
+                                                      const char* name,
+                                                      size_t len);
+
+const upb_FieldDef* upb_DefPool_FindExtensionByMiniTable(
+    const upb_DefPool* s, const upb_MiniTableExtension* ext);
+
+UPB_API const upb_FieldDef* upb_DefPool_FindExtensionByName(const upb_DefPool* s,
+                                                    const char* sym);
+
+const upb_FieldDef* upb_DefPool_FindExtensionByNameWithSize(
+    const upb_DefPool* s, const char* name, size_t size);
+
+const upb_FieldDef* upb_DefPool_FindExtensionByNumber(const upb_DefPool* s,
+                                                      const upb_MessageDef* m,
+                                                      int32_t fieldnum);
+
+const upb_ServiceDef* upb_DefPool_FindServiceByName(const upb_DefPool* s,
+                                                    const char* name);
+
+const upb_ServiceDef* upb_DefPool_FindServiceByNameWithSize(
+    const upb_DefPool* s, const char* name, size_t size);
+
+const upb_FileDef* upb_DefPool_FindFileContainingSymbol(const upb_DefPool* s,
+                                                        const char* name);
+
+UPB_API const upb_FileDef* upb_DefPool_AddFile(
+    upb_DefPool* s, const UPB_DESC(FileDescriptorProto) * file_proto,
+    upb_Status* status);
+
+UPB_API const upb_ExtensionRegistry* upb_DefPool_ExtensionRegistry(
+    const upb_DefPool* s);
+
+const upb_FieldDef** upb_DefPool_GetAllExtensions(const upb_DefPool* s,
+                                                  const upb_MessageDef* m,
+                                                  size_t* count);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_DEF_POOL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/def_type.h

@@ -0,0 +1,60 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DEF_TYPE_H_
+#define UPB_REFLECTION_DEF_TYPE_H_
+
+#include "upb/hash/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// Inside a symtab we store tagged pointers to specific def types.
+typedef enum {
+  UPB_DEFTYPE_MASK = 7,
+
+  // Only inside symtab table.
+  UPB_DEFTYPE_EXT = 0,
+  UPB_DEFTYPE_MSG = 1,
+  UPB_DEFTYPE_ENUM = 2,
+  UPB_DEFTYPE_ENUMVAL = 3,
+  UPB_DEFTYPE_SERVICE = 4,
+
+  // Only inside message table.
+  UPB_DEFTYPE_FIELD = 0,
+  UPB_DEFTYPE_ONEOF = 1,
+} upb_deftype_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Our 3-bit pointer tagging requires all pointers to be multiples of 8.
+// The arena will always yield 8-byte-aligned addresses, however we put
+// the defs into arrays. For each element in the array to be 8-byte-aligned,
+// the sizes of each def type must also be a multiple of 8.
+//
+// If any of these asserts fail, we need to add or remove padding on 32-bit
+// machines (64-bit machines will have 8-byte alignment already due to
+// pointers, which all of these structs have).
+UPB_INLINE void _upb_DefType_CheckPadding(size_t size) {
+  UPB_ASSERT((size & UPB_DEFTYPE_MASK) == 0);
+}
+
+upb_deftype_t _upb_DefType_Type(upb_value v);
+
+upb_value _upb_DefType_Pack(const void* ptr, upb_deftype_t type);
+
+const void* _upb_DefType_Unpack(upb_value v, upb_deftype_t type);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_DEF_TYPE_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/enum_def.h

@@ -0,0 +1,60 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_ENUM_DEF_H_
+#define UPB_REFLECTION_ENUM_DEF_H_
+
+#include "upb/base/string_view.h"
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool upb_EnumDef_CheckNumber(const upb_EnumDef* e, int32_t num);
+const upb_MessageDef* upb_EnumDef_ContainingType(const upb_EnumDef* e);
+int32_t upb_EnumDef_Default(const upb_EnumDef* e);
+UPB_API const upb_FileDef* upb_EnumDef_File(const upb_EnumDef* e);
+const upb_EnumValueDef* upb_EnumDef_FindValueByName(const upb_EnumDef* e,
+                                                    const char* name);
+UPB_API const upb_EnumValueDef* upb_EnumDef_FindValueByNameWithSize(
+    const upb_EnumDef* e, const char* name, size_t size);
+UPB_API const upb_EnumValueDef* upb_EnumDef_FindValueByNumber(
+    const upb_EnumDef* e, int32_t num);
+UPB_API const char* upb_EnumDef_FullName(const upb_EnumDef* e);
+bool upb_EnumDef_HasOptions(const upb_EnumDef* e);
+bool upb_EnumDef_IsClosed(const upb_EnumDef* e);
+
+// Creates a mini descriptor string for an enum, returns true on success.
+bool upb_EnumDef_MiniDescriptorEncode(const upb_EnumDef* e, upb_Arena* a,
+                                      upb_StringView* out);
+
+const char* upb_EnumDef_Name(const upb_EnumDef* e);
+const UPB_DESC(EnumOptions) * upb_EnumDef_Options(const upb_EnumDef* e);
+
+upb_StringView upb_EnumDef_ReservedName(const upb_EnumDef* e, int i);
+int upb_EnumDef_ReservedNameCount(const upb_EnumDef* e);
+
+const upb_EnumReservedRange* upb_EnumDef_ReservedRange(const upb_EnumDef* e,
+                                                       int i);
+int upb_EnumDef_ReservedRangeCount(const upb_EnumDef* e);
+
+UPB_API const upb_EnumValueDef* upb_EnumDef_Value(const upb_EnumDef* e, int i);
+UPB_API int upb_EnumDef_ValueCount(const upb_EnumDef* e);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/enum_reserved_range.h

@@ -0,0 +1,31 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_ENUM_RESERVED_RANGE_H_
+#define UPB_REFLECTION_ENUM_RESERVED_RANGE_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int32_t upb_EnumReservedRange_Start(const upb_EnumReservedRange* r);
+int32_t upb_EnumReservedRange_End(const upb_EnumReservedRange* r);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_RESERVED_RANGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/enum_value_def.h

@@ -0,0 +1,37 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_ENUM_VALUE_DEF_H_
+#define UPB_REFLECTION_ENUM_VALUE_DEF_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_EnumDef* upb_EnumValueDef_Enum(const upb_EnumValueDef* v);
+const char* upb_EnumValueDef_FullName(const upb_EnumValueDef* v);
+bool upb_EnumValueDef_HasOptions(const upb_EnumValueDef* v);
+uint32_t upb_EnumValueDef_Index(const upb_EnumValueDef* v);
+UPB_API const char* upb_EnumValueDef_Name(const upb_EnumValueDef* v);
+UPB_API int32_t upb_EnumValueDef_Number(const upb_EnumValueDef* v);
+const UPB_DESC(EnumValueOptions) *
+    upb_EnumValueDef_Options(const upb_EnumValueDef* v);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_VALUE_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/extension_range.h

@@ -0,0 +1,35 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_EXTENSION_RANGE_H_
+#define UPB_REFLECTION_EXTENSION_RANGE_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int32_t upb_ExtensionRange_Start(const upb_ExtensionRange* r);
+int32_t upb_ExtensionRange_End(const upb_ExtensionRange* r);
+
+bool upb_ExtensionRange_HasOptions(const upb_ExtensionRange* r);
+const UPB_DESC(ExtensionRangeOptions) *
+    upb_ExtensionRange_Options(const upb_ExtensionRange* r);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_EXTENSION_RANGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/field_def.h

@@ -0,0 +1,74 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_FIELD_DEF_H_
+#define UPB_REFLECTION_FIELD_DEF_H_
+
+#include "upb/base/string_view.h"
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// Maximum field number allowed for FieldDefs.
+// This is an inherent limit of the protobuf wire format.
+#define kUpb_MaxFieldNumber ((1 << 29) - 1)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_OneofDef* upb_FieldDef_ContainingOneof(const upb_FieldDef* f);
+UPB_API const upb_MessageDef* upb_FieldDef_ContainingType(
+    const upb_FieldDef* f);
+UPB_API upb_CType upb_FieldDef_CType(const upb_FieldDef* f);
+UPB_API upb_MessageValue upb_FieldDef_Default(const upb_FieldDef* f);
+UPB_API const upb_EnumDef* upb_FieldDef_EnumSubDef(const upb_FieldDef* f);
+const upb_MessageDef* upb_FieldDef_ExtensionScope(const upb_FieldDef* f);
+UPB_API const upb_FileDef* upb_FieldDef_File(const upb_FieldDef* f);
+const char* upb_FieldDef_FullName(const upb_FieldDef* f);
+bool upb_FieldDef_HasDefault(const upb_FieldDef* f);
+bool upb_FieldDef_HasJsonName(const upb_FieldDef* f);
+bool upb_FieldDef_HasOptions(const upb_FieldDef* f);
+UPB_API bool upb_FieldDef_HasPresence(const upb_FieldDef* f);
+bool upb_FieldDef_HasSubDef(const upb_FieldDef* f);
+uint32_t upb_FieldDef_Index(const upb_FieldDef* f);
+bool upb_FieldDef_IsExtension(const upb_FieldDef* f);
+UPB_API bool upb_FieldDef_IsMap(const upb_FieldDef* f);
+bool upb_FieldDef_IsOptional(const upb_FieldDef* f);
+bool upb_FieldDef_IsPacked(const upb_FieldDef* f);
+bool upb_FieldDef_IsPrimitive(const upb_FieldDef* f);
+UPB_API bool upb_FieldDef_IsRepeated(const upb_FieldDef* f);
+bool upb_FieldDef_IsRequired(const upb_FieldDef* f);
+bool upb_FieldDef_IsString(const upb_FieldDef* f);
+UPB_API bool upb_FieldDef_IsSubMessage(const upb_FieldDef* f);
+UPB_API const char* upb_FieldDef_JsonName(const upb_FieldDef* f);
+UPB_API upb_Label upb_FieldDef_Label(const upb_FieldDef* f);
+UPB_API const upb_MessageDef* upb_FieldDef_MessageSubDef(const upb_FieldDef* f);
+bool _upb_FieldDef_ValidateUtf8(const upb_FieldDef* f);
+
+// Creates a mini descriptor string for a field, returns true on success.
+bool upb_FieldDef_MiniDescriptorEncode(const upb_FieldDef* f, upb_Arena* a,
+                                       upb_StringView* out);
+
+const upb_MiniTableField* upb_FieldDef_MiniTable(const upb_FieldDef* f);
+UPB_API const char* upb_FieldDef_Name(const upb_FieldDef* f);
+UPB_API uint32_t upb_FieldDef_Number(const upb_FieldDef* f);
+const UPB_DESC(FieldOptions) * upb_FieldDef_Options(const upb_FieldDef* f);
+UPB_API const upb_OneofDef* upb_FieldDef_RealContainingOneof(
+    const upb_FieldDef* f);
+UPB_API upb_FieldType upb_FieldDef_Type(const upb_FieldDef* f);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_FIELD_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/file_def.h

@@ -0,0 +1,57 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_FILE_DEF_H_
+#define UPB_REFLECTION_FILE_DEF_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_FileDef* upb_FileDef_Dependency(const upb_FileDef* f, int i);
+int upb_FileDef_DependencyCount(const upb_FileDef* f);
+bool upb_FileDef_HasOptions(const upb_FileDef* f);
+UPB_API const char* upb_FileDef_Name(const upb_FileDef* f);
+const UPB_DESC(FileOptions) * upb_FileDef_Options(const upb_FileDef* f);
+const char* upb_FileDef_Package(const upb_FileDef* f);
+UPB_DESC(Edition) upb_FileDef_Edition(const upb_FileDef* f);
+UPB_API const upb_DefPool* upb_FileDef_Pool(const upb_FileDef* f);
+
+const upb_FileDef* upb_FileDef_PublicDependency(const upb_FileDef* f, int i);
+int upb_FileDef_PublicDependencyCount(const upb_FileDef* f);
+
+const upb_ServiceDef* upb_FileDef_Service(const upb_FileDef* f, int i);
+int upb_FileDef_ServiceCount(const upb_FileDef* f);
+
+UPB_API upb_Syntax upb_FileDef_Syntax(const upb_FileDef* f);
+
+const upb_EnumDef* upb_FileDef_TopLevelEnum(const upb_FileDef* f, int i);
+int upb_FileDef_TopLevelEnumCount(const upb_FileDef* f);
+
+const upb_FieldDef* upb_FileDef_TopLevelExtension(const upb_FileDef* f, int i);
+int upb_FileDef_TopLevelExtensionCount(const upb_FileDef* f);
+
+const upb_MessageDef* upb_FileDef_TopLevelMessage(const upb_FileDef* f, int i);
+int upb_FileDef_TopLevelMessageCount(const upb_FileDef* f);
+
+const upb_FileDef* upb_FileDef_WeakDependency(const upb_FileDef* f, int i);
+int upb_FileDef_WeakDependencyCount(const upb_FileDef* f);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_FILE_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/def_builder.h

@@ -0,0 +1,137 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DEF_BUILDER_INTERNAL_H_
+#define UPB_REFLECTION_DEF_BUILDER_INTERNAL_H_
+
+#include "upb/reflection/common.h"
+#include "upb/reflection/def_type.h"
+#include "upb/reflection/internal/def_pool.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// We want to copy the options verbatim into the destination options proto.
+// We use serialize+parse as our deep copy.
+#define UPB_DEF_SET_OPTIONS(target, desc_type, options_type, proto)           \
+  if (UPB_DESC(desc_type##_has_options)(proto)) {                             \
+    size_t size;                                                              \
+    char* pb = UPB_DESC(options_type##_serialize)(                            \
+        UPB_DESC(desc_type##_options)(proto), ctx->tmp_arena, &size);         \
+    if (!pb) _upb_DefBuilder_OomErr(ctx);                                     \
+    target =                                                                  \
+        UPB_DESC(options_type##_parse)(pb, size, _upb_DefBuilder_Arena(ctx)); \
+    if (!target) _upb_DefBuilder_OomErr(ctx);                                 \
+  } else {                                                                    \
+    target = (const UPB_DESC(options_type)*)kUpbDefOptDefault;                \
+  }
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct upb_DefBuilder {
+  upb_DefPool* symtab;
+  upb_FileDef* file;                 // File we are building.
+  upb_Arena* arena;                  // Allocate defs here.
+  upb_Arena* tmp_arena;              // For temporary allocations.
+  upb_Status* status;                // Record errors here.
+  const upb_MiniTableFile* layout;   // NULL if we should build layouts.
+  upb_MiniTablePlatform platform;    // Platform we are targeting.
+  int enum_count;                    // Count of enums built so far.
+  int msg_count;                     // Count of messages built so far.
+  int ext_count;                     // Count of extensions built so far.
+  jmp_buf err;                       // longjmp() on error.
+};
+
+extern const char* kUpbDefOptDefault;
+
+// ctx->status has already been set elsewhere so just fail/longjmp()
+UPB_NORETURN void _upb_DefBuilder_FailJmp(upb_DefBuilder* ctx);
+
+UPB_NORETURN void _upb_DefBuilder_Errf(upb_DefBuilder* ctx, const char* fmt,
+                                       ...) UPB_PRINTF(2, 3);
+UPB_NORETURN void _upb_DefBuilder_OomErr(upb_DefBuilder* ctx);
+
+const char* _upb_DefBuilder_MakeFullName(upb_DefBuilder* ctx,
+                                         const char* prefix,
+                                         upb_StringView name);
+
+// Given a symbol and the base symbol inside which it is defined,
+// find the symbol's definition.
+const void* _upb_DefBuilder_ResolveAny(upb_DefBuilder* ctx,
+                                       const char* from_name_dbg,
+                                       const char* base, upb_StringView sym,
+                                       upb_deftype_t* type);
+
+const void* _upb_DefBuilder_Resolve(upb_DefBuilder* ctx,
+                                    const char* from_name_dbg, const char* base,
+                                    upb_StringView sym, upb_deftype_t type);
+
+char _upb_DefBuilder_ParseEscape(upb_DefBuilder* ctx, const upb_FieldDef* f,
+                                 const char** src, const char* end);
+
+const char* _upb_DefBuilder_FullToShort(const char* fullname);
+
+UPB_INLINE void* _upb_DefBuilder_Alloc(upb_DefBuilder* ctx, size_t bytes) {
+  if (bytes == 0) return NULL;
+  void* ret = upb_Arena_Malloc(ctx->arena, bytes);
+  if (!ret) _upb_DefBuilder_OomErr(ctx);
+  return ret;
+}
+
+// Adds a symbol |v| to the symtab, which must be a def pointer previously
+// packed with pack_def(). The def's pointer to upb_FileDef* must be set before
+// adding, so we know which entries to remove if building this file fails.
+UPB_INLINE void _upb_DefBuilder_Add(upb_DefBuilder* ctx, const char* name,
+                                    upb_value v) {
+  upb_StringView sym = {.data = name, .size = strlen(name)};
+  bool ok = _upb_DefPool_InsertSym(ctx->symtab, sym, v, ctx->status);
+  if (!ok) _upb_DefBuilder_FailJmp(ctx);
+}
+
+UPB_INLINE upb_Arena* _upb_DefBuilder_Arena(const upb_DefBuilder* ctx) {
+  return ctx->arena;
+}
+
+UPB_INLINE upb_FileDef* _upb_DefBuilder_File(const upb_DefBuilder* ctx) {
+  return ctx->file;
+}
+
+// This version of CheckIdent() is only called by other, faster versions after
+// they detect a parsing error.
+void _upb_DefBuilder_CheckIdentSlow(upb_DefBuilder* ctx, upb_StringView name,
+                                    bool full);
+
+// Verify a full identifier string. This is slightly more complicated than
+// verifying a relative identifier string because we must track '.' chars.
+UPB_INLINE void _upb_DefBuilder_CheckIdentFull(upb_DefBuilder* ctx,
+                                               upb_StringView name) {
+  bool good = name.size > 0;
+  bool start = true;
+
+  for (size_t i = 0; i < name.size; i++) {
+    const char c = name.data[i];
+    const char d = c | 0x20;  // force lowercase
+    const bool is_alpha = (('a' <= d) & (d <= 'z')) | (c == '_');
+    const bool is_numer = ('0' <= c) & (c <= '9') & !start;
+    const bool is_dot = (c == '.') & !start;
+
+    good &= is_alpha | is_numer | is_dot;
+    start = is_dot;
+  }
+
+  if (!good) _upb_DefBuilder_CheckIdentSlow(ctx, name, true);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_DEF_BUILDER_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/def_pool.h

@@ -0,0 +1,57 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DEF_POOL_INTERNAL_H_
+#define UPB_REFLECTION_DEF_POOL_INTERNAL_H_
+
+#include "upb/mini_descriptor/decode.h"
+#include "upb/reflection/def_pool.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_Arena* _upb_DefPool_Arena(const upb_DefPool* s);
+size_t _upb_DefPool_BytesLoaded(const upb_DefPool* s);
+upb_ExtensionRegistry* _upb_DefPool_ExtReg(const upb_DefPool* s);
+
+bool _upb_DefPool_InsertExt(upb_DefPool* s, const upb_MiniTableExtension* ext,
+                            const upb_FieldDef* f);
+bool _upb_DefPool_InsertSym(upb_DefPool* s, upb_StringView sym, upb_value v,
+                            upb_Status* status);
+bool _upb_DefPool_LookupSym(const upb_DefPool* s, const char* sym, size_t size,
+                            upb_value* v);
+
+void** _upb_DefPool_ScratchData(const upb_DefPool* s);
+size_t* _upb_DefPool_ScratchSize(const upb_DefPool* s);
+void _upb_DefPool_SetPlatform(upb_DefPool* s, upb_MiniTablePlatform platform);
+
+// For generated code only: loads a generated descriptor.
+typedef struct _upb_DefPool_Init {
+  struct _upb_DefPool_Init** deps;  // Dependencies of this file.
+  const upb_MiniTableFile* layout;
+  const char* filename;
+  upb_StringView descriptor;  // Serialized descriptor.
+} _upb_DefPool_Init;
+
+bool _upb_DefPool_LoadDefInit(upb_DefPool* s, const _upb_DefPool_Init* init);
+
+// Should only be directly called by tests. This variant lets us suppress
+// the use of compiled-in tables, forcing a rebuild of the tables at runtime.
+bool _upb_DefPool_LoadDefInitEx(upb_DefPool* s, const _upb_DefPool_Init* init,
+                                bool rebuild_minitable);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_DEF_POOL_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/desc_state.h

@@ -0,0 +1,44 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_DESC_STATE_INTERNAL_H_
+#define UPB_REFLECTION_DESC_STATE_INTERNAL_H_
+
+#include "upb/mem/arena.h"
+#include "upb/mini_descriptor/internal/encode.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// Manages the storage for mini descriptor strings as they are being encoded.
+// TODO: Move some of this state directly into the encoder, maybe.
+typedef struct {
+  upb_MtDataEncoder e;
+  size_t bufsize;
+  char* buf;
+  char* ptr;
+} upb_DescState;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE void _upb_DescState_Init(upb_DescState* d) {
+  d->bufsize = kUpb_MtDataEncoder_MinSize * 2;
+  d->buf = NULL;
+  d->ptr = NULL;
+}
+
+bool _upb_DescState_Grow(upb_DescState* d, upb_Arena* a);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_DESC_STATE_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/enum_def.h

@@ -0,0 +1,36 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_ENUM_DEF_INTERNAL_H_
+#define UPB_REFLECTION_ENUM_DEF_INTERNAL_H_
+
+#include "upb/reflection/enum_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_EnumDef* _upb_EnumDef_At(const upb_EnumDef* e, int i);
+bool _upb_EnumDef_Insert(upb_EnumDef* e, upb_EnumValueDef* v, upb_Arena* a);
+const upb_MiniTableEnum* _upb_EnumDef_MiniTable(const upb_EnumDef* e);
+
+// Allocate and initialize an array of |n| enum defs.
+upb_EnumDef* _upb_EnumDefs_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(EnumDescriptorProto) * const* protos,
+    const upb_MessageDef* containing_type);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/enum_reserved_range.h

@@ -0,0 +1,35 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_ENUM_RESERVED_RANGE_INTERNAL_H_
+#define UPB_REFLECTION_ENUM_RESERVED_RANGE_INTERNAL_H_
+
+#include "upb/reflection/enum_reserved_range.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_EnumReservedRange* _upb_EnumReservedRange_At(const upb_EnumReservedRange* r,
+                                                 int i);
+
+// Allocate and initialize an array of |n| reserved ranges owned by |e|.
+upb_EnumReservedRange* _upb_EnumReservedRanges_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(EnumDescriptorProto_EnumReservedRange) * const* protos,
+    const upb_EnumDef* e);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_RESERVED_RANGE_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/enum_value_def.h

@@ -0,0 +1,37 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_ENUM_VALUE_DEF_INTERNAL_H_
+#define UPB_REFLECTION_ENUM_VALUE_DEF_INTERNAL_H_
+
+#include "upb/reflection/enum_value_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_EnumValueDef* _upb_EnumValueDef_At(const upb_EnumValueDef* v, int i);
+
+// Allocate and initialize an array of |n| enum value defs owned by |e|.
+upb_EnumValueDef* _upb_EnumValueDefs_New(
+    upb_DefBuilder* ctx, const char* prefix, int n,
+    const UPB_DESC(EnumValueDescriptorProto) * const* protos, upb_EnumDef* e,
+    bool* is_sorted);
+
+const upb_EnumValueDef** _upb_EnumValueDefs_Sorted(const upb_EnumValueDef* v,
+                                                   int n, upb_Arena* a);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ENUM_VALUE_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/extension_range.h

@@ -0,0 +1,34 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_EXTENSION_RANGE_INTERNAL_H_
+#define UPB_REFLECTION_EXTENSION_RANGE_INTERNAL_H_
+
+#include "upb/reflection/extension_range.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_ExtensionRange* _upb_ExtensionRange_At(const upb_ExtensionRange* r, int i);
+
+// Allocate and initialize an array of |n| extension ranges owned by |m|.
+upb_ExtensionRange* _upb_ExtensionRanges_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(DescriptorProto_ExtensionRange) * const* protos,
+    const upb_MessageDef* m);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_EXTENSION_RANGE_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/field_def.h

@@ -0,0 +1,56 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_FIELD_DEF_INTERNAL_H_
+#define UPB_REFLECTION_FIELD_DEF_INTERNAL_H_
+
+#include "upb/reflection/field_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_FieldDef* _upb_FieldDef_At(const upb_FieldDef* f, int i);
+
+const upb_MiniTableExtension* _upb_FieldDef_ExtensionMiniTable(
+    const upb_FieldDef* f);
+bool _upb_FieldDef_IsClosedEnum(const upb_FieldDef* f);
+bool _upb_FieldDef_IsProto3Optional(const upb_FieldDef* f);
+int _upb_FieldDef_LayoutIndex(const upb_FieldDef* f);
+uint64_t _upb_FieldDef_Modifiers(const upb_FieldDef* f);
+void _upb_FieldDef_Resolve(upb_DefBuilder* ctx, const char* prefix,
+                           upb_FieldDef* f);
+void _upb_FieldDef_BuildMiniTableExtension(upb_DefBuilder* ctx,
+                                           const upb_FieldDef* f);
+
+// Allocate and initialize an array of |n| extensions (field defs).
+upb_FieldDef* _upb_Extensions_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(FieldDescriptorProto) * const* protos, const char* prefix,
+    upb_MessageDef* m);
+
+// Allocate and initialize an array of |n| field defs.
+upb_FieldDef* _upb_FieldDefs_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(FieldDescriptorProto) * const* protos, const char* prefix,
+    upb_MessageDef* m, bool* is_sorted);
+
+// Allocate and return a list of pointers to the |n| field defs in |ff|,
+// sorted by field number.
+const upb_FieldDef** _upb_FieldDefs_Sorted(const upb_FieldDef* f, int n,
+                                           upb_Arena* a);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_FIELD_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/file_def.h

@@ -0,0 +1,37 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_FILE_DEF_INTERNAL_H_
+#define UPB_REFLECTION_FILE_DEF_INTERNAL_H_
+
+#include "upb/reflection/file_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_MiniTableExtension* _upb_FileDef_ExtensionMiniTable(
+    const upb_FileDef* f, int i);
+const int32_t* _upb_FileDef_PublicDependencyIndexes(const upb_FileDef* f);
+const int32_t* _upb_FileDef_WeakDependencyIndexes(const upb_FileDef* f);
+
+// upb_FileDef_Package() returns "" if f->package is NULL, this does not.
+const char* _upb_FileDef_RawPackage(const upb_FileDef* f);
+
+void _upb_FileDef_Create(upb_DefBuilder* ctx,
+                         const UPB_DESC(FileDescriptorProto) * file_proto);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_FILE_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/message_def.h

@@ -0,0 +1,43 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_MESSAGE_DEF_INTERNAL_H_
+#define UPB_REFLECTION_MESSAGE_DEF_INTERNAL_H_
+
+#include "upb/reflection/message_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_MessageDef* _upb_MessageDef_At(const upb_MessageDef* m, int i);
+bool _upb_MessageDef_InMessageSet(const upb_MessageDef* m);
+bool _upb_MessageDef_Insert(upb_MessageDef* m, const char* name, size_t size,
+                            upb_value v, upb_Arena* a);
+void _upb_MessageDef_InsertField(upb_DefBuilder* ctx, upb_MessageDef* m,
+                                 const upb_FieldDef* f);
+bool _upb_MessageDef_IsValidExtensionNumber(const upb_MessageDef* m, int n);
+void _upb_MessageDef_CreateMiniTable(upb_DefBuilder* ctx, upb_MessageDef* m);
+void _upb_MessageDef_LinkMiniTable(upb_DefBuilder* ctx,
+                                   const upb_MessageDef* m);
+void _upb_MessageDef_Resolve(upb_DefBuilder* ctx, upb_MessageDef* m);
+
+// Allocate and initialize an array of |n| message defs.
+upb_MessageDef* _upb_MessageDefs_New(
+    upb_DefBuilder* ctx, int n, const UPB_DESC(DescriptorProto) * const* protos,
+    const upb_MessageDef* containing_type);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_MESSAGE_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/message_reserved_range.h

@@ -0,0 +1,35 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_MESSAGE_RESERVED_RANGE_INTERNAL_H_
+#define UPB_REFLECTION_MESSAGE_RESERVED_RANGE_INTERNAL_H_
+
+#include "upb/reflection/message_reserved_range.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_MessageReservedRange* _upb_MessageReservedRange_At(
+    const upb_MessageReservedRange* r, int i);
+
+// Allocate and initialize an array of |n| reserved ranges owned by |m|.
+upb_MessageReservedRange* _upb_MessageReservedRanges_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(DescriptorProto_ReservedRange) * const* protos,
+    const upb_MessageDef* m);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_MESSAGE_RESERVED_RANGE_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/method_def.h

@@ -0,0 +1,33 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_METHOD_DEF_INTERNAL_H_
+#define UPB_REFLECTION_METHOD_DEF_INTERNAL_H_
+
+#include "upb/reflection/method_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_MethodDef* _upb_MethodDef_At(const upb_MethodDef* m, int i);
+
+// Allocate and initialize an array of |n| method defs owned by |s|.
+upb_MethodDef* _upb_MethodDefs_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(MethodDescriptorProto) * const* protos, upb_ServiceDef* s);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_METHOD_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/oneof_def.h

@@ -0,0 +1,37 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_ONEOF_DEF_INTERNAL_H_
+#define UPB_REFLECTION_ONEOF_DEF_INTERNAL_H_
+
+#include "upb/reflection/oneof_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_OneofDef* _upb_OneofDef_At(const upb_OneofDef* o, int i);
+void _upb_OneofDef_Insert(upb_DefBuilder* ctx, upb_OneofDef* o,
+                          const upb_FieldDef* f, const char* name, size_t size);
+
+// Allocate and initialize an array of |n| oneof defs owned by |m|.
+upb_OneofDef* _upb_OneofDefs_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(OneofDescriptorProto) * const* protos, upb_MessageDef* m);
+
+size_t _upb_OneofDefs_Finalize(upb_DefBuilder* ctx, upb_MessageDef* m);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ONEOF_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/service_def.h

@@ -0,0 +1,33 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_SERVICE_DEF_INTERNAL_H_
+#define UPB_REFLECTION_SERVICE_DEF_INTERNAL_H_
+
+#include "upb/reflection/service_def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+upb_ServiceDef* _upb_ServiceDef_At(const upb_ServiceDef* s, int i);
+
+// Allocate and initialize an array of |n| service defs.
+upb_ServiceDef* _upb_ServiceDefs_New(
+    upb_DefBuilder* ctx, int n,
+    const UPB_DESC(ServiceDescriptorProto) * const* protos);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_SERVICE_DEF_INTERNAL_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/internal/strdup2.h

@@ -0,0 +1,32 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_INTERNAL_STRDUP2_H_
+#define UPB_REFLECTION_INTERNAL_STRDUP2_H_
+
+#include <stddef.h>
+
+#include "upb/mem/arena.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Variant that works with a length-delimited rather than NULL-delimited string,
+// as supported by strtable.
+char* upb_strdup2(const char* s, size_t len, upb_Arena* a);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_INTERNAL_STRDUP2_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/message.h

@@ -0,0 +1,89 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_MESSAGE_H_
+#define UPB_REFLECTION_MESSAGE_H_
+
+#include <stddef.h>
+
+#include "upb/mem/arena.h"
+#include "upb/message/map.h"
+#include "upb/message/types.h"
+#include "upb/message/value.h"  // IWYU pragma: export
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Returns a mutable pointer to a map, array, or submessage value. If the given
+// arena is non-NULL this will construct a new object if it was not previously
+// present. May not be called for primitive fields.
+UPB_API upb_MutableMessageValue upb_Message_Mutable(upb_Message* msg,
+                                                    const upb_FieldDef* f,
+                                                    upb_Arena* a);
+
+// Returns the field that is set in the oneof, or NULL if none are set.
+UPB_API const upb_FieldDef* upb_Message_WhichOneof(const upb_Message* msg,
+                                                   const upb_OneofDef* o);
+
+// Clear all data and unknown fields.
+void upb_Message_ClearByDef(upb_Message* msg, const upb_MessageDef* m);
+
+// Clears any field presence and sets the value back to its default.
+UPB_API void upb_Message_ClearFieldByDef(upb_Message* msg,
+                                         const upb_FieldDef* f);
+
+// May only be called for fields where upb_FieldDef_HasPresence(f) == true.
+UPB_API bool upb_Message_HasFieldByDef(const upb_Message* msg,
+                                       const upb_FieldDef* f);
+
+// Returns the value in the message associated with this field def.
+UPB_API upb_MessageValue upb_Message_GetFieldByDef(const upb_Message* msg,
+                                                   const upb_FieldDef* f);
+
+// Sets the given field to the given value. For a msg/array/map/string, the
+// caller must ensure that the target data outlives |msg| (by living either in
+// the same arena or a different arena that outlives it).
+//
+// Returns false if allocation fails.
+UPB_API bool upb_Message_SetFieldByDef(upb_Message* msg, const upb_FieldDef* f,
+                                       upb_MessageValue val, upb_Arena* a);
+
+// Iterate over present fields.
+//
+// size_t iter = kUpb_Message_Begin;
+// const upb_FieldDef *f;
+// upb_MessageValue val;
+// while (upb_Message_Next(msg, m, ext_pool, &f, &val, &iter)) {
+//   process_field(f, val);
+// }
+//
+// If ext_pool is NULL, no extensions will be returned.  If the given symtab
+// returns extensions that don't match what is in this message, those extensions
+// will be skipped.
+
+#define kUpb_Message_Begin -1
+
+bool upb_Message_Next(const upb_Message* msg, const upb_MessageDef* m,
+                      const upb_DefPool* ext_pool, const upb_FieldDef** f,
+                      upb_MessageValue* val, size_t* iter);
+
+// Clears all unknown field data from this message and all submessages.
+UPB_API bool upb_Message_DiscardUnknown(upb_Message* msg,
+                                        const upb_MessageDef* m, int maxdepth);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_MESSAGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/message.hpp

@@ -0,0 +1,19 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_REFLECTION_MESSAGE_HPP_
+#define UPB_REFLECTION_MESSAGE_HPP_
+
+#include "upb/reflection/message.h"
+
+namespace upb {
+
+typedef upb_MessageValue MessageValue;
+
+}  // namespace upb
+
+#endif  // UPB_REFLECTION_MESSAGE_HPP_

Pods/gRPC-C++/third_party/upb/upb/reflection/message_def.h

@@ -0,0 +1,156 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_MESSAGE_DEF_H_
+#define UPB_REFLECTION_MESSAGE_DEF_H_
+
+#include "upb/base/string_view.h"
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+// Well-known field tag numbers for map-entry messages.
+#define kUpb_MapEntry_KeyFieldNumber 1
+#define kUpb_MapEntry_ValueFieldNumber 2
+
+// Well-known field tag numbers for Any messages.
+#define kUpb_Any_TypeFieldNumber 1
+#define kUpb_Any_ValueFieldNumber 2
+
+// Well-known field tag numbers for duration messages.
+#define kUpb_Duration_SecondsFieldNumber 1
+#define kUpb_Duration_NanosFieldNumber 2
+
+// Well-known field tag numbers for timestamp messages.
+#define kUpb_Timestamp_SecondsFieldNumber 1
+#define kUpb_Timestamp_NanosFieldNumber 2
+
+// All the different kind of well known type messages. For simplicity of check,
+// number wrappers and string wrappers are grouped together. Make sure the
+// order and number of these groups are not changed.
+typedef enum {
+  kUpb_WellKnown_Unspecified,
+  kUpb_WellKnown_Any,
+  kUpb_WellKnown_FieldMask,
+  kUpb_WellKnown_Duration,
+  kUpb_WellKnown_Timestamp,
+
+  // number wrappers
+  kUpb_WellKnown_DoubleValue,
+  kUpb_WellKnown_FloatValue,
+  kUpb_WellKnown_Int64Value,
+  kUpb_WellKnown_UInt64Value,
+  kUpb_WellKnown_Int32Value,
+  kUpb_WellKnown_UInt32Value,
+
+  // string wrappers
+  kUpb_WellKnown_StringValue,
+  kUpb_WellKnown_BytesValue,
+  kUpb_WellKnown_BoolValue,
+  kUpb_WellKnown_Value,
+  kUpb_WellKnown_ListValue,
+  kUpb_WellKnown_Struct,
+} upb_WellKnown;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_MessageDef* upb_MessageDef_ContainingType(const upb_MessageDef* m);
+
+const upb_ExtensionRange* upb_MessageDef_ExtensionRange(const upb_MessageDef* m,
+                                                        int i);
+int upb_MessageDef_ExtensionRangeCount(const upb_MessageDef* m);
+
+UPB_API const upb_FieldDef* upb_MessageDef_Field(const upb_MessageDef* m,
+                                                 int i);
+UPB_API int upb_MessageDef_FieldCount(const upb_MessageDef* m);
+
+UPB_API const upb_FileDef* upb_MessageDef_File(const upb_MessageDef* m);
+
+// Returns a field by either JSON name or regular proto name.
+const upb_FieldDef* upb_MessageDef_FindByJsonNameWithSize(
+    const upb_MessageDef* m, const char* name, size_t size);
+UPB_INLINE const upb_FieldDef* upb_MessageDef_FindByJsonName(
+    const upb_MessageDef* m, const char* name) {
+  return upb_MessageDef_FindByJsonNameWithSize(m, name, strlen(name));
+}
+
+// Lookup of either field or oneof by name. Returns whether either was found.
+// If the return is true, then the found def will be set, and the non-found
+// one set to NULL.
+UPB_API bool upb_MessageDef_FindByNameWithSize(const upb_MessageDef* m,
+                                               const char* name, size_t size,
+                                               const upb_FieldDef** f,
+                                               const upb_OneofDef** o);
+UPB_INLINE bool upb_MessageDef_FindByName(const upb_MessageDef* m,
+                                          const char* name,
+                                          const upb_FieldDef** f,
+                                          const upb_OneofDef** o) {
+  return upb_MessageDef_FindByNameWithSize(m, name, strlen(name), f, o);
+}
+
+const upb_FieldDef* upb_MessageDef_FindFieldByName(const upb_MessageDef* m,
+                                                   const char* name);
+UPB_API const upb_FieldDef* upb_MessageDef_FindFieldByNameWithSize(
+    const upb_MessageDef* m, const char* name, size_t size);
+UPB_API const upb_FieldDef* upb_MessageDef_FindFieldByNumber(
+    const upb_MessageDef* m, uint32_t i);
+const upb_OneofDef* upb_MessageDef_FindOneofByName(const upb_MessageDef* m,
+                                                   const char* name);
+UPB_API const upb_OneofDef* upb_MessageDef_FindOneofByNameWithSize(
+    const upb_MessageDef* m, const char* name, size_t size);
+UPB_API const char* upb_MessageDef_FullName(const upb_MessageDef* m);
+bool upb_MessageDef_HasOptions(const upb_MessageDef* m);
+bool upb_MessageDef_IsMapEntry(const upb_MessageDef* m);
+bool upb_MessageDef_IsMessageSet(const upb_MessageDef* m);
+
+// Creates a mini descriptor string for a message, returns true on success.
+bool upb_MessageDef_MiniDescriptorEncode(const upb_MessageDef* m, upb_Arena* a,
+                                         upb_StringView* out);
+
+UPB_API const upb_MiniTable* upb_MessageDef_MiniTable(const upb_MessageDef* m);
+const char* upb_MessageDef_Name(const upb_MessageDef* m);
+
+const upb_EnumDef* upb_MessageDef_NestedEnum(const upb_MessageDef* m, int i);
+const upb_FieldDef* upb_MessageDef_NestedExtension(const upb_MessageDef* m,
+                                                   int i);
+const upb_MessageDef* upb_MessageDef_NestedMessage(const upb_MessageDef* m,
+                                                   int i);
+
+int upb_MessageDef_NestedEnumCount(const upb_MessageDef* m);
+int upb_MessageDef_NestedExtensionCount(const upb_MessageDef* m);
+int upb_MessageDef_NestedMessageCount(const upb_MessageDef* m);
+
+UPB_API const upb_OneofDef* upb_MessageDef_Oneof(const upb_MessageDef* m,
+                                                 int i);
+UPB_API int upb_MessageDef_OneofCount(const upb_MessageDef* m);
+int upb_MessageDef_RealOneofCount(const upb_MessageDef* m);
+
+const UPB_DESC(MessageOptions) *
+    upb_MessageDef_Options(const upb_MessageDef* m);
+
+upb_StringView upb_MessageDef_ReservedName(const upb_MessageDef* m, int i);
+int upb_MessageDef_ReservedNameCount(const upb_MessageDef* m);
+
+const upb_MessageReservedRange* upb_MessageDef_ReservedRange(
+    const upb_MessageDef* m, int i);
+int upb_MessageDef_ReservedRangeCount(const upb_MessageDef* m);
+
+UPB_API upb_Syntax upb_MessageDef_Syntax(const upb_MessageDef* m);
+UPB_API upb_WellKnown upb_MessageDef_WellKnownType(const upb_MessageDef* m);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_MESSAGE_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/message_reserved_range.h

@@ -0,0 +1,31 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_MESSAGE_RESERVED_RANGE_H_
+#define UPB_REFLECTION_MESSAGE_RESERVED_RANGE_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int32_t upb_MessageReservedRange_Start(const upb_MessageReservedRange* r);
+int32_t upb_MessageReservedRange_End(const upb_MessageReservedRange* r);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_MESSAGE_RESERVED_RANGE_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/method_def.h

@@ -0,0 +1,39 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_METHOD_DEF_H_
+#define UPB_REFLECTION_METHOD_DEF_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+bool upb_MethodDef_ClientStreaming(const upb_MethodDef* m);
+const char* upb_MethodDef_FullName(const upb_MethodDef* m);
+bool upb_MethodDef_HasOptions(const upb_MethodDef* m);
+int upb_MethodDef_Index(const upb_MethodDef* m);
+const upb_MessageDef* upb_MethodDef_InputType(const upb_MethodDef* m);
+const char* upb_MethodDef_Name(const upb_MethodDef* m);
+const UPB_DESC(MethodOptions) * upb_MethodDef_Options(const upb_MethodDef* m);
+const upb_MessageDef* upb_MethodDef_OutputType(const upb_MethodDef* m);
+bool upb_MethodDef_ServerStreaming(const upb_MethodDef* m);
+const upb_ServiceDef* upb_MethodDef_Service(const upb_MethodDef* m);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_METHOD_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/oneof_def.h

@@ -0,0 +1,47 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_ONEOF_DEF_H_
+#define UPB_REFLECTION_ONEOF_DEF_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_API const upb_MessageDef* upb_OneofDef_ContainingType(
+    const upb_OneofDef* o);
+UPB_API const upb_FieldDef* upb_OneofDef_Field(const upb_OneofDef* o, int i);
+UPB_API int upb_OneofDef_FieldCount(const upb_OneofDef* o);
+const char* upb_OneofDef_FullName(const upb_OneofDef* o);
+bool upb_OneofDef_HasOptions(const upb_OneofDef* o);
+uint32_t upb_OneofDef_Index(const upb_OneofDef* o);
+bool upb_OneofDef_IsSynthetic(const upb_OneofDef* o);
+const upb_FieldDef* upb_OneofDef_LookupName(const upb_OneofDef* o,
+                                            const char* name);
+const upb_FieldDef* upb_OneofDef_LookupNameWithSize(const upb_OneofDef* o,
+                                                    const char* name,
+                                                    size_t size);
+const upb_FieldDef* upb_OneofDef_LookupNumber(const upb_OneofDef* o,
+                                              uint32_t num);
+UPB_API const char* upb_OneofDef_Name(const upb_OneofDef* o);
+int upb_OneofDef_numfields(const upb_OneofDef* o);
+const UPB_DESC(OneofOptions) * upb_OneofDef_Options(const upb_OneofDef* o);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_ONEOF_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/reflection/service_def.h

@@ -0,0 +1,40 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// IWYU pragma: private, include "upb/reflection/def.h"
+
+#ifndef UPB_REFLECTION_SERVICE_DEF_H_
+#define UPB_REFLECTION_SERVICE_DEF_H_
+
+#include "upb/reflection/common.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const upb_FileDef* upb_ServiceDef_File(const upb_ServiceDef* s);
+const upb_MethodDef* upb_ServiceDef_FindMethodByName(const upb_ServiceDef* s,
+                                                     const char* name);
+const char* upb_ServiceDef_FullName(const upb_ServiceDef* s);
+bool upb_ServiceDef_HasOptions(const upb_ServiceDef* s);
+int upb_ServiceDef_Index(const upb_ServiceDef* s);
+const upb_MethodDef* upb_ServiceDef_Method(const upb_ServiceDef* s, int i);
+int upb_ServiceDef_MethodCount(const upb_ServiceDef* s);
+const char* upb_ServiceDef_Name(const upb_ServiceDef* s);
+const UPB_DESC(ServiceOptions) *
+    upb_ServiceDef_Options(const upb_ServiceDef* s);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_REFLECTION_SERVICE_DEF_H_ */

Pods/gRPC-C++/third_party/upb/upb/text/encode.h

@@ -0,0 +1,49 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_TEXT_ENCODE_H_
+#define UPB_TEXT_ENCODE_H_
+
+#include "upb/reflection/def.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+  // When set, prints everything on a single line.
+  UPB_TXTENC_SINGLELINE = 1,
+
+  // When set, unknown fields are not printed.
+  UPB_TXTENC_SKIPUNKNOWN = 2,
+
+  // When set, maps are *not* sorted (this avoids allocating tmp mem).
+  UPB_TXTENC_NOSORT = 4
+};
+
+/* Encodes the given |msg| to text format.  The message's reflection is given in
+ * |m|.  The symtab in |symtab| is used to find extensions (if NULL, extensions
+ * will not be printed).
+ *
+ * Output is placed in the given buffer, and always NULL-terminated.  The output
+ * size (excluding NULL) is returned.  This means that a return value >= |size|
+ * implies that the output was truncated.  (These are the same semantics as
+ * snprintf()). */
+size_t upb_TextEncode(const upb_Message* msg, const upb_MessageDef* m,
+                      const upb_DefPool* ext_pool, int options, char* buf,
+                      size_t size);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_TEXT_ENCODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/decode.h

@@ -0,0 +1,132 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// upb_decode: parsing into a upb_Message using a upb_MiniTable.
+
+#ifndef UPB_WIRE_DECODE_H_
+#define UPB_WIRE_DECODE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "upb/mem/arena.h"
+#include "upb/message/message.h"
+#include "upb/mini_table/extension_registry.h"
+#include "upb/mini_table/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+  /* If set, strings will alias the input buffer instead of copying into the
+   * arena. */
+  kUpb_DecodeOption_AliasString = 1,
+
+  /* If set, the parse will return failure if any message is missing any
+   * required fields when the message data ends.  The parse will still continue,
+   * and the failure will only be reported at the end.
+   *
+   * IMPORTANT CAVEATS:
+   *
+   * 1. This can throw a false positive failure if an incomplete message is seen
+   *    on the wire but is later completed when the sub-message occurs again.
+   *    For this reason, a second pass is required to verify a failure, to be
+   *    truly robust.
+   *
+   * 2. This can return a false success if you are decoding into a message that
+   *    already has some sub-message fields present.  If the sub-message does
+   *    not occur in the binary payload, we will never visit it and discover the
+   *    incomplete sub-message.  For this reason, this check is only useful for
+   *    implemting ParseFromString() semantics.  For MergeFromString(), a
+   *    post-parse validation step will always be necessary. */
+  kUpb_DecodeOption_CheckRequired = 2,
+
+  /* EXPERIMENTAL:
+   *
+   * If set, the parser will allow parsing of sub-message fields that were not
+   * previously linked using upb_MiniTable_SetSubMessage().  The data will be
+   * parsed into an internal "empty" message type that cannot be accessed
+   * directly, but can be later promoted into the true message type if the
+   * sub-message fields are linked at a later time.
+   *
+   * Users should set this option if they intend to perform dynamic tree shaking
+   * and promoting using the interfaces in message/promote.h.  If this option is
+   * enabled, it is important that the resulting messages are only accessed by
+   * code that is aware of promotion rules:
+   *
+   * 1. Message pointers in upb_Message, upb_Array, and upb_Map are represented
+   *    by a tagged pointer upb_TaggedMessagePointer.  The tag indicates whether
+   *    the message uses the internal "empty" type.
+   *
+   * 2. Any code *reading* these message pointers must test whether the "empty"
+   *    tag bit is set, using the interfaces in mini_table/types.h.  However
+   *    writing of message pointers should always use plain upb_Message*, since
+   *    users are not allowed to create "empty" messages.
+   *
+   * 3. It is always safe to test whether a field is present or test the array
+   *    length; these interfaces will reflect that empty messages are present,
+   *    even though their data cannot be accessed without promoting first.
+   *
+   * 4. If a message pointer is indeed tagged as empty, the message may not be
+   *    accessed directly, only promoted through the interfaces in
+   *    message/promote.h.
+   *
+   * 5. Tagged/empty messages may never be created by the user.  They may only
+   *    be created by the parser or the message-copying logic in message/copy.h.
+   */
+  kUpb_DecodeOption_ExperimentalAllowUnlinked = 4,
+};
+
+UPB_INLINE uint32_t upb_DecodeOptions_MaxDepth(uint16_t depth) {
+  return (uint32_t)depth << 16;
+}
+
+UPB_INLINE uint16_t upb_DecodeOptions_GetMaxDepth(uint32_t options) {
+  return options >> 16;
+}
+
+// Enforce an upper bound on recursion depth.
+UPB_INLINE int upb_Decode_LimitDepth(uint32_t decode_options, uint32_t limit) {
+  uint32_t max_depth = upb_DecodeOptions_GetMaxDepth(decode_options);
+  if (max_depth > limit) max_depth = limit;
+  return upb_DecodeOptions_MaxDepth(max_depth) | (decode_options & 0xffff);
+}
+
+typedef enum {
+  kUpb_DecodeStatus_Ok = 0,
+  kUpb_DecodeStatus_Malformed = 1,    // Wire format was corrupt
+  kUpb_DecodeStatus_OutOfMemory = 2,  // Arena alloc failed
+  kUpb_DecodeStatus_BadUtf8 = 3,      // String field had bad UTF-8
+  kUpb_DecodeStatus_MaxDepthExceeded =
+      4,  // Exceeded upb_DecodeOptions_MaxDepth
+
+  // kUpb_DecodeOption_CheckRequired failed (see above), but the parse otherwise
+  // succeeded.
+  kUpb_DecodeStatus_MissingRequired = 5,
+
+  // Unlinked sub-message field was present, but
+  // kUpb_DecodeOptions_ExperimentalAllowUnlinked was not specified in the list
+  // of options.
+  kUpb_DecodeStatus_UnlinkedSubMessage = 6,
+} upb_DecodeStatus;
+
+UPB_API upb_DecodeStatus upb_Decode(const char* buf, size_t size,
+                                    upb_Message* msg, const upb_MiniTable* l,
+                                    const upb_ExtensionRegistry* extreg,
+                                    int options, upb_Arena* arena);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_WIRE_DECODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/decode_fast.h

@@ -0,0 +1,147 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// These are the specialized field parser functions for the fast parser.
+// Generated tables will refer to these by name.
+//
+// The function names are encoded with names like:
+//
+//   //  123 4
+//   upb_pss_1bt();   // Parse singular string, 1 byte tag.
+//
+// In position 1:
+//   - 'p' for parse, most function use this
+//   - 'c' for copy, for when we are copying strings instead of aliasing
+//
+// In position 2 (cardinality):
+//   - 's' for singular, with or without hasbit
+//   - 'o' for oneof
+//   - 'r' for non-packed repeated
+//   - 'p' for packed repeated
+//
+// In position 3 (type):
+//   - 'b1' for bool
+//   - 'v4' for 4-byte varint
+//   - 'v8' for 8-byte varint
+//   - 'z4' for zig-zag-encoded 4-byte varint
+//   - 'z8' for zig-zag-encoded 8-byte varint
+//   - 'f4' for 4-byte fixed
+//   - 'f8' for 8-byte fixed
+//   - 'm' for sub-message
+//   - 's' for string (validate UTF-8)
+//   - 'b' for bytes
+//
+// In position 4 (tag length):
+//   - '1' for one-byte tags (field numbers 1-15)
+//   - '2' for two-byte tags (field numbers 16-2048)
+
+#ifndef UPB_WIRE_DECODE_FAST_H_
+#define UPB_WIRE_DECODE_FAST_H_
+
+#include "upb/message/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct upb_Decoder;
+
+// The fallback, generic parsing function that can handle any field type.
+// This just uses the regular (non-fast) parser to parse a single field.
+const char* _upb_FastDecoder_DecodeGeneric(struct upb_Decoder* d,
+                                           const char* ptr, upb_Message* msg,
+                                           intptr_t table, uint64_t hasbits,
+                                           uint64_t data);
+
+#define UPB_PARSE_PARAMS                                                    \
+  struct upb_Decoder *d, const char *ptr, upb_Message *msg, intptr_t table, \
+      uint64_t hasbits, uint64_t data
+
+/* primitive fields ***********************************************************/
+
+#define F(card, type, valbytes, tagbytes) \
+  const char* upb_p##card##type##valbytes##_##tagbytes##bt(UPB_PARSE_PARAMS);
+
+#define TYPES(card, tagbytes) \
+  F(card, b, 1, tagbytes)     \
+  F(card, v, 4, tagbytes)     \
+  F(card, v, 8, tagbytes)     \
+  F(card, z, 4, tagbytes)     \
+  F(card, z, 8, tagbytes)     \
+  F(card, f, 4, tagbytes)     \
+  F(card, f, 8, tagbytes)
+
+#define TAGBYTES(card) \
+  TYPES(card, 1)       \
+  TYPES(card, 2)
+
+TAGBYTES(s)
+TAGBYTES(o)
+TAGBYTES(r)
+TAGBYTES(p)
+
+#undef F
+#undef TYPES
+#undef TAGBYTES
+
+/* string fields **************************************************************/
+
+#define F(card, tagbytes, type)                                     \
+  const char* upb_p##card##type##_##tagbytes##bt(UPB_PARSE_PARAMS); \
+  const char* upb_c##card##type##_##tagbytes##bt(UPB_PARSE_PARAMS);
+
+#define UTF8(card, tagbytes) \
+  F(card, tagbytes, s)       \
+  F(card, tagbytes, b)
+
+#define TAGBYTES(card) \
+  UTF8(card, 1)        \
+  UTF8(card, 2)
+
+TAGBYTES(s)
+TAGBYTES(o)
+TAGBYTES(r)
+
+#undef F
+#undef TAGBYTES
+
+/* sub-message fields *********************************************************/
+
+#define F(card, tagbytes, size_ceil, ceil_arg) \
+  const char* upb_p##card##m_##tagbytes##bt_max##size_ceil##b(UPB_PARSE_PARAMS);
+
+#define SIZES(card, tagbytes) \
+  F(card, tagbytes, 64, 64)   \
+  F(card, tagbytes, 128, 128) \
+  F(card, tagbytes, 192, 192) \
+  F(card, tagbytes, 256, 256) \
+  F(card, tagbytes, max, -1)
+
+#define TAGBYTES(card) \
+  SIZES(card, 1)       \
+  SIZES(card, 2)
+
+TAGBYTES(s)
+TAGBYTES(o)
+TAGBYTES(r)
+
+#undef TAGBYTES
+#undef SIZES
+#undef F
+
+#undef UPB_PARSE_PARAMS
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_WIRE_DECODE_FAST_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/encode.h

@@ -0,0 +1,76 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+// upb_Encode: parsing from a upb_Message using a upb_MiniTable.
+
+#ifndef UPB_WIRE_ENCODE_H_
+#define UPB_WIRE_ENCODE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "upb/mem/arena.h"
+#include "upb/mini_table/message.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum {
+  /* If set, the results of serializing will be deterministic across all
+   * instances of this binary. There are no guarantees across different
+   * binary builds.
+   *
+   * If your proto contains maps, the encoder will need to malloc()/free()
+   * memory during encode. */
+  kUpb_EncodeOption_Deterministic = 1,
+
+  // When set, unknown fields are not printed.
+  kUpb_EncodeOption_SkipUnknown = 2,
+
+  // When set, the encode will fail if any required fields are missing.
+  kUpb_EncodeOption_CheckRequired = 4,
+};
+
+typedef enum {
+  kUpb_EncodeStatus_Ok = 0,
+  kUpb_EncodeStatus_OutOfMemory = 1,  // Arena alloc failed
+  kUpb_EncodeStatus_MaxDepthExceeded = 2,
+
+  // kUpb_EncodeOption_CheckRequired failed but the parse otherwise succeeded.
+  kUpb_EncodeStatus_MissingRequired = 3,
+} upb_EncodeStatus;
+
+UPB_INLINE uint32_t upb_EncodeOptions_MaxDepth(uint16_t depth) {
+  return (uint32_t)depth << 16;
+}
+
+UPB_INLINE uint16_t upb_EncodeOptions_GetMaxDepth(uint32_t options) {
+  return options >> 16;
+}
+
+// Enforce an upper bound on recursion depth.
+UPB_INLINE int upb_Encode_LimitDepth(uint32_t encode_options, uint32_t limit) {
+  uint32_t max_depth = upb_EncodeOptions_GetMaxDepth(encode_options);
+  if (max_depth > limit) max_depth = limit;
+  return upb_EncodeOptions_MaxDepth(max_depth) | (encode_options & 0xffff);
+}
+
+UPB_API upb_EncodeStatus upb_Encode(const void* msg, const upb_MiniTable* l,
+                                    int options, upb_Arena* arena, char** buf,
+                                    size_t* size);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_WIRE_ENCODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/eps_copy_input_stream.h

@@ -0,0 +1,405 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_WIRE_EPS_COPY_INPUT_STREAM_H_
+#define UPB_WIRE_EPS_COPY_INPUT_STREAM_H_
+
+#include <string.h>
+
+#include "upb/mem/arena.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// The maximum number of bytes a single protobuf field can take up in the
+// wire format.  We only want to do one bounds check per field, so the input
+// stream guarantees that after upb_EpsCopyInputStream_IsDone() is called,
+// the decoder can read this many bytes without performing another bounds
+// check.  The stream will copy into a patch buffer as necessary to guarantee
+// this invariant.
+#define kUpb_EpsCopyInputStream_SlopBytes 16
+
+enum {
+  kUpb_EpsCopyInputStream_NoAliasing = 0,
+  kUpb_EpsCopyInputStream_OnPatch = 1,
+  kUpb_EpsCopyInputStream_NoDelta = 2
+};
+
+typedef struct {
+  const char* end;        // Can read up to SlopBytes bytes beyond this.
+  const char* limit_ptr;  // For bounds checks, = end + UPB_MIN(limit, 0)
+  uintptr_t aliasing;
+  int limit;              // Submessage limit relative to end
+  bool error;             // To distinguish between EOF and error.
+  char patch[kUpb_EpsCopyInputStream_SlopBytes * 2];
+} upb_EpsCopyInputStream;
+
+// Returns true if the stream is in the error state. A stream enters the error
+// state when the user reads past a limit (caught in IsDone()) or the
+// ZeroCopyInputStream returns an error.
+UPB_INLINE bool upb_EpsCopyInputStream_IsError(upb_EpsCopyInputStream* e) {
+  return e->error;
+}
+
+typedef const char* upb_EpsCopyInputStream_BufferFlipCallback(
+    upb_EpsCopyInputStream* e, const char* old_end, const char* new_start);
+
+typedef const char* upb_EpsCopyInputStream_IsDoneFallbackFunc(
+    upb_EpsCopyInputStream* e, const char* ptr, int overrun);
+
+// Initializes a upb_EpsCopyInputStream using the contents of the buffer
+// [*ptr, size].  Updates `*ptr` as necessary to guarantee that at least
+// kUpb_EpsCopyInputStream_SlopBytes are available to read.
+UPB_INLINE void upb_EpsCopyInputStream_Init(upb_EpsCopyInputStream* e,
+                                            const char** ptr, size_t size,
+                                            bool enable_aliasing) {
+  if (size <= kUpb_EpsCopyInputStream_SlopBytes) {
+    memset(&e->patch, 0, 32);
+    if (size) memcpy(&e->patch, *ptr, size);
+    e->aliasing = enable_aliasing ? (uintptr_t)*ptr - (uintptr_t)e->patch
+                                  : kUpb_EpsCopyInputStream_NoAliasing;
+    *ptr = e->patch;
+    e->end = *ptr + size;
+    e->limit = 0;
+  } else {
+    e->end = *ptr + size - kUpb_EpsCopyInputStream_SlopBytes;
+    e->limit = kUpb_EpsCopyInputStream_SlopBytes;
+    e->aliasing = enable_aliasing ? kUpb_EpsCopyInputStream_NoDelta
+                                  : kUpb_EpsCopyInputStream_NoAliasing;
+  }
+  e->limit_ptr = e->end;
+  e->error = false;
+}
+
+typedef enum {
+  // The current stream position is at a limit.
+  kUpb_IsDoneStatus_Done,
+
+  // The current stream position is not at a limit.
+  kUpb_IsDoneStatus_NotDone,
+
+  // The current stream position is not at a limit, and the stream needs to
+  // be flipped to a new buffer before more data can be read.
+  kUpb_IsDoneStatus_NeedFallback,
+} upb_IsDoneStatus;
+
+// Returns the status of the current stream position.  This is a low-level
+// function, it is simpler to call upb_EpsCopyInputStream_IsDone() if possible.
+UPB_INLINE upb_IsDoneStatus upb_EpsCopyInputStream_IsDoneStatus(
+    upb_EpsCopyInputStream* e, const char* ptr, int* overrun) {
+  *overrun = ptr - e->end;
+  if (UPB_LIKELY(ptr < e->limit_ptr)) {
+    return kUpb_IsDoneStatus_NotDone;
+  } else if (UPB_LIKELY(*overrun == e->limit)) {
+    return kUpb_IsDoneStatus_Done;
+  } else {
+    return kUpb_IsDoneStatus_NeedFallback;
+  }
+}
+
+// Returns true if the stream has hit a limit, either the current delimited
+// limit or the overall end-of-stream. As a side effect, this function may flip
+// the pointer to a new buffer if there are less than
+// kUpb_EpsCopyInputStream_SlopBytes of data to be read in the current buffer.
+//
+// Postcondition: if the function returns false, there are at least
+// kUpb_EpsCopyInputStream_SlopBytes of data available to read at *ptr.
+UPB_INLINE bool upb_EpsCopyInputStream_IsDoneWithCallback(
+    upb_EpsCopyInputStream* e, const char** ptr,
+    upb_EpsCopyInputStream_IsDoneFallbackFunc* func) {
+  int overrun;
+  switch (upb_EpsCopyInputStream_IsDoneStatus(e, *ptr, &overrun)) {
+    case kUpb_IsDoneStatus_Done:
+      return true;
+    case kUpb_IsDoneStatus_NotDone:
+      return false;
+    case kUpb_IsDoneStatus_NeedFallback:
+      *ptr = func(e, *ptr, overrun);
+      return *ptr == NULL;
+  }
+  UPB_UNREACHABLE();
+}
+
+const char* _upb_EpsCopyInputStream_IsDoneFallbackNoCallback(
+    upb_EpsCopyInputStream* e, const char* ptr, int overrun);
+
+// A simpler version of IsDoneWithCallback() that does not support a buffer flip
+// callback. Useful in cases where we do not need to insert custom logic at
+// every buffer flip.
+//
+// If this returns true, the user must call upb_EpsCopyInputStream_IsError()
+// to distinguish between EOF and error.
+UPB_INLINE bool upb_EpsCopyInputStream_IsDone(upb_EpsCopyInputStream* e,
+                                              const char** ptr) {
+  return upb_EpsCopyInputStream_IsDoneWithCallback(
+      e, ptr, _upb_EpsCopyInputStream_IsDoneFallbackNoCallback);
+}
+
+// Returns the total number of bytes that are safe to read from the current
+// buffer without reading uninitialized or unallocated memory.
+//
+// Note that this check does not respect any semantic limits on the stream,
+// either limits from PushLimit() or the overall stream end, so some of these
+// bytes may have unpredictable, nonsense values in them. The guarantee is only
+// that the bytes are valid to read from the perspective of the C language
+// (ie. you can read without triggering UBSAN or ASAN).
+UPB_INLINE size_t upb_EpsCopyInputStream_BytesAvailable(
+    upb_EpsCopyInputStream* e, const char* ptr) {
+  return (e->end - ptr) + kUpb_EpsCopyInputStream_SlopBytes;
+}
+
+// Returns true if the given delimited field size is valid (it does not extend
+// beyond any previously-pushed limits).  `ptr` should point to the beginning
+// of the field data, after the delimited size.
+//
+// Note that this does *not* guarantee that all of the data for this field is in
+// the current buffer.
+UPB_INLINE bool upb_EpsCopyInputStream_CheckSize(
+    const upb_EpsCopyInputStream* e, const char* ptr, int size) {
+  UPB_ASSERT(size >= 0);
+  return ptr - e->end + size <= e->limit;
+}
+
+UPB_INLINE bool _upb_EpsCopyInputStream_CheckSizeAvailable(
+    upb_EpsCopyInputStream* e, const char* ptr, int size, bool submessage) {
+  // This is one extra branch compared to the more normal:
+  //   return (size_t)(end - ptr) < size;
+  // However it is one less computation if we are just about to use "ptr + len":
+  //   https://godbolt.org/z/35YGPz
+  // In microbenchmarks this shows a small improvement.
+  uintptr_t uptr = (uintptr_t)ptr;
+  uintptr_t uend = (uintptr_t)e->limit_ptr;
+  uintptr_t res = uptr + (size_t)size;
+  if (!submessage) uend += kUpb_EpsCopyInputStream_SlopBytes;
+  // NOTE: this check depends on having a linear address space.  This is not
+  // technically guaranteed by uintptr_t.
+  bool ret = res >= uptr && res <= uend;
+  if (size < 0) UPB_ASSERT(!ret);
+  return ret;
+}
+
+// Returns true if the given delimited field size is valid (it does not extend
+// beyond any previously-pushed limited) *and* all of the data for this field is
+// available to be read in the current buffer.
+//
+// If the size is negative, this function will always return false. This
+// property can be useful in some cases.
+UPB_INLINE bool upb_EpsCopyInputStream_CheckDataSizeAvailable(
+    upb_EpsCopyInputStream* e, const char* ptr, int size) {
+  return _upb_EpsCopyInputStream_CheckSizeAvailable(e, ptr, size, false);
+}
+
+// Returns true if the given sub-message size is valid (it does not extend
+// beyond any previously-pushed limited) *and* all of the data for this
+// sub-message is available to be parsed in the current buffer.
+//
+// This implies that all fields from the sub-message can be parsed from the
+// current buffer while maintaining the invariant that we always have at least
+// kUpb_EpsCopyInputStream_SlopBytes of data available past the beginning of
+// any individual field start.
+//
+// If the size is negative, this function will always return false. This
+// property can be useful in some cases.
+UPB_INLINE bool upb_EpsCopyInputStream_CheckSubMessageSizeAvailable(
+    upb_EpsCopyInputStream* e, const char* ptr, int size) {
+  return _upb_EpsCopyInputStream_CheckSizeAvailable(e, ptr, size, true);
+}
+
+// Returns true if aliasing_enabled=true was passed to
+// upb_EpsCopyInputStream_Init() when this stream was initialized.
+UPB_INLINE bool upb_EpsCopyInputStream_AliasingEnabled(
+    upb_EpsCopyInputStream* e) {
+  return e->aliasing != kUpb_EpsCopyInputStream_NoAliasing;
+}
+
+// Returns true if aliasing_enabled=true was passed to
+// upb_EpsCopyInputStream_Init() when this stream was initialized *and* we can
+// alias into the region [ptr, size] in an input buffer.
+UPB_INLINE bool upb_EpsCopyInputStream_AliasingAvailable(
+    upb_EpsCopyInputStream* e, const char* ptr, size_t size) {
+  // When EpsCopyInputStream supports streaming, this will need to become a
+  // runtime check.
+  return upb_EpsCopyInputStream_CheckDataSizeAvailable(e, ptr, size) &&
+         e->aliasing >= kUpb_EpsCopyInputStream_NoDelta;
+}
+
+// Returns a pointer into an input buffer that corresponds to the parsing
+// pointer `ptr`.  The returned pointer may be the same as `ptr`, but also may
+// be different if we are currently parsing out of the patch buffer.
+//
+// REQUIRES: Aliasing must be available for the given pointer. If the input is a
+// flat buffer and aliasing is enabled, then aliasing will always be available.
+UPB_INLINE const char* upb_EpsCopyInputStream_GetAliasedPtr(
+    upb_EpsCopyInputStream* e, const char* ptr) {
+  UPB_ASSUME(upb_EpsCopyInputStream_AliasingAvailable(e, ptr, 0));
+  uintptr_t delta =
+      e->aliasing == kUpb_EpsCopyInputStream_NoDelta ? 0 : e->aliasing;
+  return (const char*)((uintptr_t)ptr + delta);
+}
+
+// Reads string data from the input, aliasing into the input buffer instead of
+// copying. The parsing pointer is passed in `*ptr`, and will be updated if
+// necessary to point to the actual input buffer. Returns the new parsing
+// pointer, which will be advanced past the string data.
+//
+// REQUIRES: Aliasing must be available for this data region (test with
+// upb_EpsCopyInputStream_AliasingAvailable().
+UPB_INLINE const char* upb_EpsCopyInputStream_ReadStringAliased(
+    upb_EpsCopyInputStream* e, const char** ptr, size_t size) {
+  UPB_ASSUME(upb_EpsCopyInputStream_AliasingAvailable(e, *ptr, size));
+  const char* ret = *ptr + size;
+  *ptr = upb_EpsCopyInputStream_GetAliasedPtr(e, *ptr);
+  UPB_ASSUME(ret != NULL);
+  return ret;
+}
+
+// Skips `size` bytes of data from the input and returns a pointer past the end.
+// Returns NULL on end of stream or error.
+UPB_INLINE const char* upb_EpsCopyInputStream_Skip(upb_EpsCopyInputStream* e,
+                                                   const char* ptr, int size) {
+  if (!upb_EpsCopyInputStream_CheckDataSizeAvailable(e, ptr, size)) return NULL;
+  return ptr + size;
+}
+
+// Copies `size` bytes of data from the input `ptr` into the buffer `to`, and
+// returns a pointer past the end. Returns NULL on end of stream or error.
+UPB_INLINE const char* upb_EpsCopyInputStream_Copy(upb_EpsCopyInputStream* e,
+                                                   const char* ptr, void* to,
+                                                   int size) {
+  if (!upb_EpsCopyInputStream_CheckDataSizeAvailable(e, ptr, size)) return NULL;
+  memcpy(to, ptr, size);
+  return ptr + size;
+}
+
+// Reads string data from the stream and advances the pointer accordingly.
+// If aliasing was enabled when the stream was initialized, then the returned
+// pointer will point into the input buffer if possible, otherwise new data
+// will be allocated from arena and copied into. We may be forced to copy even
+// if aliasing was enabled if the input data spans input buffers.
+//
+// Returns NULL if memory allocation failed, or we reached a premature EOF.
+UPB_INLINE const char* upb_EpsCopyInputStream_ReadString(
+    upb_EpsCopyInputStream* e, const char** ptr, size_t size,
+    upb_Arena* arena) {
+  if (upb_EpsCopyInputStream_AliasingAvailable(e, *ptr, size)) {
+    return upb_EpsCopyInputStream_ReadStringAliased(e, ptr, size);
+  } else {
+    // We need to allocate and copy.
+    if (!upb_EpsCopyInputStream_CheckDataSizeAvailable(e, *ptr, size)) {
+      return NULL;
+    }
+    UPB_ASSERT(arena);
+    char* data = (char*)upb_Arena_Malloc(arena, size);
+    if (!data) return NULL;
+    const char* ret = upb_EpsCopyInputStream_Copy(e, *ptr, data, size);
+    *ptr = data;
+    return ret;
+  }
+}
+
+UPB_INLINE void _upb_EpsCopyInputStream_CheckLimit(upb_EpsCopyInputStream* e) {
+  UPB_ASSERT(e->limit_ptr == e->end + UPB_MIN(0, e->limit));
+}
+
+// Pushes a limit onto the stack of limits for the current stream.  The limit
+// will extend for `size` bytes beyond the position in `ptr`.  Future calls to
+// upb_EpsCopyInputStream_IsDone() will return `true` when the stream position
+// reaches this limit.
+//
+// Returns a delta that the caller must store and supply to PopLimit() below.
+UPB_INLINE int upb_EpsCopyInputStream_PushLimit(upb_EpsCopyInputStream* e,
+                                                const char* ptr, int size) {
+  int limit = size + (int)(ptr - e->end);
+  int delta = e->limit - limit;
+  _upb_EpsCopyInputStream_CheckLimit(e);
+  UPB_ASSERT(limit <= e->limit);
+  e->limit = limit;
+  e->limit_ptr = e->end + UPB_MIN(0, limit);
+  _upb_EpsCopyInputStream_CheckLimit(e);
+  return delta;
+}
+
+// Pops the last limit that was pushed on this stream.  This may only be called
+// once IsDone() returns true.  The user must pass the delta that was returned
+// from PushLimit().
+UPB_INLINE void upb_EpsCopyInputStream_PopLimit(upb_EpsCopyInputStream* e,
+                                                const char* ptr,
+                                                int saved_delta) {
+  UPB_ASSERT(ptr - e->end == e->limit);
+  _upb_EpsCopyInputStream_CheckLimit(e);
+  e->limit += saved_delta;
+  e->limit_ptr = e->end + UPB_MIN(0, e->limit);
+  _upb_EpsCopyInputStream_CheckLimit(e);
+}
+
+UPB_INLINE const char* _upb_EpsCopyInputStream_IsDoneFallbackInline(
+    upb_EpsCopyInputStream* e, const char* ptr, int overrun,
+    upb_EpsCopyInputStream_BufferFlipCallback* callback) {
+  if (overrun < e->limit) {
+    // Need to copy remaining data into patch buffer.
+    UPB_ASSERT(overrun < kUpb_EpsCopyInputStream_SlopBytes);
+    const char* old_end = ptr;
+    const char* new_start = &e->patch[0] + overrun;
+    memset(e->patch + kUpb_EpsCopyInputStream_SlopBytes, 0,
+           kUpb_EpsCopyInputStream_SlopBytes);
+    memcpy(e->patch, e->end, kUpb_EpsCopyInputStream_SlopBytes);
+    ptr = new_start;
+    e->end = &e->patch[kUpb_EpsCopyInputStream_SlopBytes];
+    e->limit -= kUpb_EpsCopyInputStream_SlopBytes;
+    e->limit_ptr = e->end + e->limit;
+    UPB_ASSERT(ptr < e->limit_ptr);
+    if (e->aliasing != kUpb_EpsCopyInputStream_NoAliasing) {
+      e->aliasing = (uintptr_t)old_end - (uintptr_t)new_start;
+    }
+    return callback(e, old_end, new_start);
+  } else {
+    UPB_ASSERT(overrun > e->limit);
+    e->error = true;
+    return callback(e, NULL, NULL);
+  }
+}
+
+typedef const char* upb_EpsCopyInputStream_ParseDelimitedFunc(
+    upb_EpsCopyInputStream* e, const char* ptr, void* ctx);
+
+// Tries to perform a fast-path handling of the given delimited message data.
+// If the sub-message beginning at `*ptr` and extending for `len` is short and
+// fits within this buffer, calls `func` with `ctx` as a parameter, where the
+// pushing and popping of limits is handled automatically and with lower cost
+// than the normal PushLimit()/PopLimit() sequence.
+static UPB_FORCEINLINE bool upb_EpsCopyInputStream_TryParseDelimitedFast(
+    upb_EpsCopyInputStream* e, const char** ptr, int len,
+    upb_EpsCopyInputStream_ParseDelimitedFunc* func, void* ctx) {
+  if (!upb_EpsCopyInputStream_CheckSubMessageSizeAvailable(e, *ptr, len)) {
+    return false;
+  }
+
+  // Fast case: Sub-message is <128 bytes and fits in the current buffer.
+  // This means we can preserve limit/limit_ptr verbatim.
+  const char* saved_limit_ptr = e->limit_ptr;
+  int saved_limit = e->limit;
+  e->limit_ptr = *ptr + len;
+  e->limit = e->limit_ptr - e->end;
+  UPB_ASSERT(e->limit_ptr == e->end + UPB_MIN(0, e->limit));
+  *ptr = func(e, *ptr, ctx);
+  e->limit_ptr = saved_limit_ptr;
+  e->limit = saved_limit;
+  UPB_ASSERT(e->limit_ptr == e->end + UPB_MIN(0, e->limit));
+  return true;
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_WIRE_EPS_COPY_INPUT_STREAM_H_

Pods/gRPC-C++/third_party/upb/upb/wire/internal/constants.h

@@ -0,0 +1,27 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_WIRE_INTERNAL_CONSTANTS_H_
+#define UPB_WIRE_INTERNAL_CONSTANTS_H_
+
+#define kUpb_WireFormat_DefaultDepthLimit 100
+
+// MessageSet wire format is:
+//   message MessageSet {
+//     repeated group Item = 1 {
+//       required int32 type_id = 2;
+//       required bytes message = 3;
+//     }
+//   }
+
+enum {
+  kUpb_MsgSet_Item = 1,
+  kUpb_MsgSet_TypeId = 2,
+  kUpb_MsgSet_Message = 3,
+};
+
+#endif /* UPB_WIRE_INTERNAL_CONSTANTS_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/internal/decode.h

@@ -0,0 +1,143 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+/*
+ * Internal implementation details of the decoder that are shared between
+ * decode.c and decode_fast.c.
+ */
+
+#ifndef UPB_WIRE_INTERNAL_DECODE_H_
+#define UPB_WIRE_INTERNAL_DECODE_H_
+
+#include "upb/mem/internal/arena.h"
+#include "upb/message/internal/message.h"
+#include "upb/wire/decode.h"
+#include "upb/wire/eps_copy_input_stream.h"
+#include "utf8_range.h"
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#define DECODE_NOGROUP (uint32_t) - 1
+
+typedef struct upb_Decoder {
+  upb_EpsCopyInputStream input;
+  const upb_ExtensionRegistry* extreg;
+  const char* unknown;       // Start of unknown data, preserve at buffer flip
+  upb_Message* unknown_msg;  // Pointer to preserve data to
+  int depth;                 // Tracks recursion depth to bound stack usage.
+  uint32_t end_group;  // field number of END_GROUP tag, else DECODE_NOGROUP.
+  uint16_t options;
+  bool missing_required;
+  upb_Arena arena;
+  upb_DecodeStatus status;
+  jmp_buf err;
+
+#ifndef NDEBUG
+  const char* debug_tagstart;
+  const char* debug_valstart;
+#endif
+} upb_Decoder;
+
+/* Error function that will abort decoding with longjmp(). We can't declare this
+ * UPB_NORETURN, even though it is appropriate, because if we do then compilers
+ * will "helpfully" refuse to tailcall to it
+ * (see: https://stackoverflow.com/a/55657013), which will defeat a major goal
+ * of our optimizations. That is also why we must declare it in a separate file,
+ * otherwise the compiler will see that it calls longjmp() and deduce that it is
+ * noreturn. */
+const char* _upb_FastDecoder_ErrorJmp(upb_Decoder* d, int status);
+
+extern const uint8_t upb_utf8_offsets[];
+
+UPB_INLINE
+bool _upb_Decoder_VerifyUtf8Inline(const char* ptr, int len) {
+  const char* end = ptr + len;
+
+  // Check 8 bytes at a time for any non-ASCII char.
+  while (end - ptr >= 8) {
+    uint64_t data;
+    memcpy(&data, ptr, 8);
+    if (data & 0x8080808080808080) goto non_ascii;
+    ptr += 8;
+  }
+
+  // Check one byte at a time for non-ASCII.
+  while (ptr < end) {
+    if (*ptr & 0x80) goto non_ascii;
+    ptr++;
+  }
+
+  return true;
+
+non_ascii:
+  return utf8_range2((const unsigned char*)ptr, end - ptr) == 0;
+}
+
+const char* _upb_Decoder_CheckRequired(upb_Decoder* d, const char* ptr,
+                                       const upb_Message* msg,
+                                       const upb_MiniTable* l);
+
+/* x86-64 pointers always have the high 16 bits matching. So we can shift
+ * left 8 and right 8 without loss of information. */
+UPB_INLINE intptr_t decode_totable(const upb_MiniTable* tablep) {
+  return ((intptr_t)tablep << 8) | tablep->table_mask;
+}
+
+UPB_INLINE const upb_MiniTable* decode_totablep(intptr_t table) {
+  return (const upb_MiniTable*)(table >> 8);
+}
+
+const char* _upb_Decoder_IsDoneFallback(upb_EpsCopyInputStream* e,
+                                        const char* ptr, int overrun);
+
+UPB_INLINE bool _upb_Decoder_IsDone(upb_Decoder* d, const char** ptr) {
+  return upb_EpsCopyInputStream_IsDoneWithCallback(
+      &d->input, ptr, &_upb_Decoder_IsDoneFallback);
+}
+
+UPB_INLINE const char* _upb_Decoder_BufferFlipCallback(
+    upb_EpsCopyInputStream* e, const char* old_end, const char* new_start) {
+  upb_Decoder* d = (upb_Decoder*)e;
+  if (!old_end) _upb_FastDecoder_ErrorJmp(d, kUpb_DecodeStatus_Malformed);
+
+  if (d->unknown) {
+    if (!_upb_Message_AddUnknown(d->unknown_msg, d->unknown,
+                                 old_end - d->unknown, &d->arena)) {
+      _upb_FastDecoder_ErrorJmp(d, kUpb_DecodeStatus_OutOfMemory);
+    }
+    d->unknown = new_start;
+  }
+  return new_start;
+}
+
+#if UPB_FASTTABLE
+UPB_INLINE
+const char* _upb_FastDecoder_TagDispatch(upb_Decoder* d, const char* ptr,
+                                         upb_Message* msg, intptr_t table,
+                                         uint64_t hasbits, uint64_t tag) {
+  const upb_MiniTable* table_p = decode_totablep(table);
+  uint8_t mask = table;
+  uint64_t data;
+  size_t idx = tag & mask;
+  UPB_ASSUME((idx & 7) == 0);
+  idx >>= 3;
+  data = table_p->fasttable[idx].field_data ^ tag;
+  UPB_MUSTTAIL return table_p->fasttable[idx].field_parser(d, ptr, msg, table,
+                                                           hasbits, data);
+}
+#endif
+
+UPB_INLINE uint32_t _upb_FastDecoder_LoadTag(const char* ptr) {
+  uint16_t tag;
+  memcpy(&tag, ptr, 2);
+  return tag;
+}
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_WIRE_INTERNAL_DECODE_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/internal/swap.h

@@ -0,0 +1,45 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_WIRE_INTERNAL_SWAP_H_
+#define UPB_WIRE_INTERNAL_SWAP_H_
+
+#include <stdint.h>
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+UPB_INLINE bool _upb_IsLittleEndian(void) {
+  int x = 1;
+  return *(char*)&x == 1;
+}
+
+UPB_INLINE uint32_t _upb_BigEndian_Swap32(uint32_t val) {
+  if (_upb_IsLittleEndian()) return val;
+
+  return ((val & 0xff) << 24) | ((val & 0xff00) << 8) |
+         ((val & 0xff0000) >> 8) | ((val & 0xff000000) >> 24);
+}
+
+UPB_INLINE uint64_t _upb_BigEndian_Swap64(uint64_t val) {
+  if (_upb_IsLittleEndian()) return val;
+
+  return ((uint64_t)_upb_BigEndian_Swap32((uint32_t)val) << 32) |
+         _upb_BigEndian_Swap32((uint32_t)(val >> 32));
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif /* UPB_WIRE_INTERNAL_SWAP_H_ */

Pods/gRPC-C++/third_party/upb/upb/wire/reader.h

@@ -0,0 +1,207 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_WIRE_READER_H_
+#define UPB_WIRE_READER_H_
+
+#include "upb/wire/eps_copy_input_stream.h"
+#include "upb/wire/internal/swap.h"
+#include "upb/wire/types.h"  // IWYU pragma: export
+
+// Must be last.
+#include "upb/port/def.inc"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// The upb_WireReader interface is suitable for general-purpose parsing of
+// protobuf binary wire format.  It is designed to be used along with
+// upb_EpsCopyInputStream for buffering, and all parsing routines in this file
+// assume that at least kUpb_EpsCopyInputStream_SlopBytes worth of data is
+// available to read without any bounds checks.
+
+#define kUpb_WireReader_WireTypeMask 7
+#define kUpb_WireReader_WireTypeBits 3
+
+typedef struct {
+  const char* ptr;
+  uint64_t val;
+} _upb_WireReader_ReadLongVarintRet;
+
+_upb_WireReader_ReadLongVarintRet _upb_WireReader_ReadLongVarint(
+    const char* ptr, uint64_t val);
+
+static UPB_FORCEINLINE const char* _upb_WireReader_ReadVarint(const char* ptr,
+                                                              uint64_t* val,
+                                                              int maxlen,
+                                                              uint64_t maxval) {
+  uint64_t byte = (uint8_t)*ptr;
+  if (UPB_LIKELY((byte & 0x80) == 0)) {
+    *val = (uint32_t)byte;
+    return ptr + 1;
+  }
+  const char* start = ptr;
+  _upb_WireReader_ReadLongVarintRet res =
+      _upb_WireReader_ReadLongVarint(ptr, byte);
+  if (!res.ptr || (maxlen < 10 && res.ptr - start > maxlen) ||
+      res.val > maxval) {
+    return NULL;  // Malformed.
+  }
+  *val = res.val;
+  return res.ptr;
+}
+
+// Parses a tag into `tag`, and returns a pointer past the end of the tag, or
+// NULL if there was an error in the tag data.
+//
+// REQUIRES: there must be at least 10 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+static UPB_FORCEINLINE const char* upb_WireReader_ReadTag(const char* ptr,
+                                                          uint32_t* tag) {
+  uint64_t val;
+  ptr = _upb_WireReader_ReadVarint(ptr, &val, 5, UINT32_MAX);
+  if (!ptr) return NULL;
+  *tag = val;
+  return ptr;
+}
+
+// Given a tag, returns the field number.
+UPB_INLINE uint32_t upb_WireReader_GetFieldNumber(uint32_t tag) {
+  return tag >> kUpb_WireReader_WireTypeBits;
+}
+
+// Given a tag, returns the wire type.
+UPB_INLINE uint8_t upb_WireReader_GetWireType(uint32_t tag) {
+  return tag & kUpb_WireReader_WireTypeMask;
+}
+
+UPB_INLINE const char* upb_WireReader_ReadVarint(const char* ptr,
+                                                 uint64_t* val) {
+  return _upb_WireReader_ReadVarint(ptr, val, 10, UINT64_MAX);
+}
+
+// Skips data for a varint, returning a pointer past the end of the varint, or
+// NULL if there was an error in the varint data.
+//
+// REQUIRES: there must be at least 10 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+UPB_INLINE const char* upb_WireReader_SkipVarint(const char* ptr) {
+  uint64_t val;
+  return upb_WireReader_ReadVarint(ptr, &val);
+}
+
+// Reads a varint indicating the size of a delimited field into `size`, or
+// NULL if there was an error in the varint data.
+//
+// REQUIRES: there must be at least 10 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+UPB_INLINE const char* upb_WireReader_ReadSize(const char* ptr, int* size) {
+  uint64_t size64;
+  ptr = upb_WireReader_ReadVarint(ptr, &size64);
+  if (!ptr || size64 >= INT32_MAX) return NULL;
+  *size = size64;
+  return ptr;
+}
+
+// Reads a fixed32 field, performing byte swapping if necessary.
+//
+// REQUIRES: there must be at least 4 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+UPB_INLINE const char* upb_WireReader_ReadFixed32(const char* ptr, void* val) {
+  uint32_t uval;
+  memcpy(&uval, ptr, 4);
+  uval = _upb_BigEndian_Swap32(uval);
+  memcpy(val, &uval, 4);
+  return ptr + 4;
+}
+
+// Reads a fixed64 field, performing byte swapping if necessary.
+//
+// REQUIRES: there must be at least 4 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+UPB_INLINE const char* upb_WireReader_ReadFixed64(const char* ptr, void* val) {
+  uint64_t uval;
+  memcpy(&uval, ptr, 8);
+  uval = _upb_BigEndian_Swap64(uval);
+  memcpy(val, &uval, 8);
+  return ptr + 8;
+}
+
+const char* _upb_WireReader_SkipGroup(const char* ptr, uint32_t tag,
+                                      int depth_limit,
+                                      upb_EpsCopyInputStream* stream);
+
+// Skips data for a group, returning a pointer past the end of the group, or
+// NULL if there was an error parsing the group.  The `tag` argument should be
+// the start group tag that begins the group.  The `depth_limit` argument
+// indicates how many levels of recursion the group is allowed to have before
+// reporting a parse error (this limit exists to protect against stack
+// overflow).
+//
+// TODO: evaluate how the depth_limit should be specified. Do users need
+// control over this?
+UPB_INLINE const char* upb_WireReader_SkipGroup(
+    const char* ptr, uint32_t tag, upb_EpsCopyInputStream* stream) {
+  return _upb_WireReader_SkipGroup(ptr, tag, 100, stream);
+}
+
+UPB_INLINE const char* _upb_WireReader_SkipValue(
+    const char* ptr, uint32_t tag, int depth_limit,
+    upb_EpsCopyInputStream* stream) {
+  switch (upb_WireReader_GetWireType(tag)) {
+    case kUpb_WireType_Varint:
+      return upb_WireReader_SkipVarint(ptr);
+    case kUpb_WireType_32Bit:
+      return ptr + 4;
+    case kUpb_WireType_64Bit:
+      return ptr + 8;
+    case kUpb_WireType_Delimited: {
+      int size;
+      ptr = upb_WireReader_ReadSize(ptr, &size);
+      if (!ptr) return NULL;
+      ptr += size;
+      return ptr;
+    }
+    case kUpb_WireType_StartGroup:
+      return _upb_WireReader_SkipGroup(ptr, tag, depth_limit, stream);
+    case kUpb_WireType_EndGroup:
+      return NULL;  // Should be handled before now.
+    default:
+      return NULL;  // Unknown wire type.
+  }
+}
+
+// Skips data for a wire value of any type, returning a pointer past the end of
+// the data, or NULL if there was an error parsing the group. The `tag` argument
+// should be the tag that was just parsed. The `depth_limit` argument indicates
+// how many levels of recursion a group is allowed to have before reporting a
+// parse error (this limit exists to protect against stack overflow).
+//
+// REQUIRES: there must be at least 10 bytes of data available at `ptr`.
+// Bounds checks must be performed before calling this function, preferably
+// by calling upb_EpsCopyInputStream_IsDone().
+//
+// TODO: evaluate how the depth_limit should be specified. Do users need
+// control over this?
+UPB_INLINE const char* upb_WireReader_SkipValue(
+    const char* ptr, uint32_t tag, upb_EpsCopyInputStream* stream) {
+  return _upb_WireReader_SkipValue(ptr, tag, 100, stream);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#include "upb/port/undef.inc"
+
+#endif  // UPB_WIRE_READER_H_

Pods/gRPC-C++/third_party/upb/upb/wire/types.h

@@ -0,0 +1,21 @@
+// Protocol Buffers - Google's data interchange format
+// Copyright 2023 Google LLC.  All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file or at
+// https://developers.google.com/open-source/licenses/bsd
+
+#ifndef UPB_WIRE_TYPES_H_
+#define UPB_WIRE_TYPES_H_
+
+// A list of types as they are encoded on the wire.
+typedef enum {
+  kUpb_WireType_Varint = 0,
+  kUpb_WireType_64Bit = 1,
+  kUpb_WireType_Delimited = 2,
+  kUpb_WireType_StartGroup = 3,
+  kUpb_WireType_EndGroup = 4,
+  kUpb_WireType_32Bit = 5
+} upb_WireType;
+
+#endif /* UPB_WIRE_TYPES_H_ */