修改pods

Pods/abseil/absl/log/absl_check.h

@@ -0,0 +1,117 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/absl_check.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of `ABSL_CHECK` macros as alternative spellings
+// for `CHECK` macros in `check.h`.
+//
+// Except for those whose names begin with `ABSL_DCHECK`, these macros are not
+// controlled by `NDEBUG` (cf. `assert`), so the check will be executed
+// regardless of compilation mode. `ABSL_CHECK` and friends are thus useful for
+// confirming invariants in situations where continuing to run would be worse
+// than terminating, e.g., due to risk of data corruption or security
+// compromise.  It is also more robust and portable to deliberately terminate
+// at a particular place with a useful message and backtrace than to assume some
+// ultimately unspecified and unreliable crashing behavior (such as a
+// "segmentation fault").
+//
+// For full documentation of each macro, see comments in `check.h`, which has an
+// identical set of macros without the ABSL_* prefix.
+
+#ifndef ABSL_LOG_ABSL_CHECK_H_
+#define ABSL_LOG_ABSL_CHECK_H_
+
+#include "absl/log/internal/check_impl.h"
+
+#define ABSL_CHECK(condition) \
+  ABSL_LOG_INTERNAL_CHECK_IMPL((condition), #condition)
+#define ABSL_QCHECK(condition) \
+  ABSL_LOG_INTERNAL_QCHECK_IMPL((condition), #condition)
+#define ABSL_PCHECK(condition) \
+  ABSL_LOG_INTERNAL_PCHECK_IMPL((condition), #condition)
+#define ABSL_DCHECK(condition) \
+  ABSL_LOG_INTERNAL_DCHECK_IMPL((condition), #condition)
+
+#define ABSL_CHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_CHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_CHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_CHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_CHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_CHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_GT_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_QCHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_GT_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define ABSL_DCHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_GT_IMPL((val1), #val1, (val2), #val2)
+
+#define ABSL_CHECK_OK(status) ABSL_LOG_INTERNAL_CHECK_OK_IMPL((status), #status)
+#define ABSL_QCHECK_OK(status) \
+  ABSL_LOG_INTERNAL_QCHECK_OK_IMPL((status), #status)
+#define ABSL_DCHECK_OK(status) \
+  ABSL_LOG_INTERNAL_DCHECK_OK_IMPL((status), #status)
+
+#define ABSL_CHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_CHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_CHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_CHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_QCHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_QCHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_QCHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_QCHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_DCHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_DCHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_DCHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define ABSL_DCHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+
+#endif  // ABSL_LOG_ABSL_CHECK_H_

Pods/abseil/absl/log/absl_log.h

@@ -0,0 +1,115 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/absl_log.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of `ABSL_LOG` macros as alternative spellings
+// for macros in `log.h`.
+//
+// Basic invocation looks like this:
+//
+//   ABSL_LOG(INFO) << "Found " << num_cookies << " cookies";
+//
+// Most `ABSL_LOG` macros take a severity level argument. The severity levels
+// are `INFO`, `WARNING`, `ERROR`, and `FATAL`.
+//
+// For full documentation, see comments in `log.h`, which includes full
+// reference documentation on use of the equivalent `LOG` macro and has an
+// identical set of macros without the ABSL_* prefix.
+
+#ifndef ABSL_LOG_ABSL_LOG_H_
+#define ABSL_LOG_ABSL_LOG_H_
+
+#include "absl/log/internal/log_impl.h"
+
+#define ABSL_LOG(severity) ABSL_LOG_INTERNAL_LOG_IMPL(_##severity)
+#define ABSL_PLOG(severity) ABSL_LOG_INTERNAL_PLOG_IMPL(_##severity)
+#define ABSL_DLOG(severity) ABSL_LOG_INTERNAL_DLOG_IMPL(_##severity)
+
+#define ABSL_VLOG(verbose_level) ABSL_LOG_INTERNAL_VLOG_IMPL(verbose_level)
+#define ABSL_DVLOG(verbose_level) ABSL_LOG_INTERNAL_DVLOG_IMPL(verbose_level)
+
+#define ABSL_LOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_LOG_IF_IMPL(_##severity, condition)
+#define ABSL_PLOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_PLOG_IF_IMPL(_##severity, condition)
+#define ABSL_DLOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_DLOG_IF_IMPL(_##severity, condition)
+
+#define ABSL_LOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_N_IMPL(_##severity, n)
+#define ABSL_LOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_LOG_FIRST_N_IMPL(_##severity, n)
+#define ABSL_LOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_POW_2_IMPL(_##severity)
+#define ABSL_LOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define ABSL_PLOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_N_IMPL(_##severity, n)
+#define ABSL_PLOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_PLOG_FIRST_N_IMPL(_##severity, n)
+#define ABSL_PLOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_POW_2_IMPL(_##severity)
+#define ABSL_PLOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define ABSL_DLOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_N_IMPL(_##severity, n)
+#define ABSL_DLOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_DLOG_FIRST_N_IMPL(_##severity, n)
+#define ABSL_DLOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_POW_2_IMPL(_##severity)
+#define ABSL_DLOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define ABSL_VLOG_EVERY_N(verbose_level, n) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_N_IMPL(verbose_level, n)
+#define ABSL_VLOG_FIRST_N(verbose_level, n) \
+  ABSL_LOG_INTERNAL_VLOG_FIRST_N_IMPL(verbose_level, n)
+#define ABSL_VLOG_EVERY_POW_2(verbose_level, n) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_POW_2_IMPL(verbose_level, n)
+#define ABSL_VLOG_EVERY_N_SEC(verbose_level, n) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_N_SEC_IMPL(verbose_level, n)
+
+#define ABSL_LOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define ABSL_LOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_LOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define ABSL_LOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define ABSL_LOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#define ABSL_PLOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define ABSL_PLOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_PLOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define ABSL_PLOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define ABSL_PLOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#define ABSL_DLOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define ABSL_DLOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_DLOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define ABSL_DLOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define ABSL_DLOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#endif  // ABSL_LOG_ABSL_LOG_H_

Pods/abseil/absl/log/absl_vlog_is_on.h

@@ -0,0 +1,93 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/absl_vlog_is_on.h
+// -----------------------------------------------------------------------------
+//
+// This header defines the `ABSL_VLOG_IS_ON()` macro that controls the
+// variable-verbosity conditional logging.
+//
+// It's used by `VLOG` in log.h, or it can also be used directly like this:
+//
+//   if (ABSL_VLOG_IS_ON(2)) {
+//     foo_server.RecomputeStatisticsExpensive();
+//     LOG(INFO) << foo_server.LastStatisticsAsString();
+//   }
+//
+// Each source file has an effective verbosity level that's a non-negative
+// integer computed from the `--vmodule` and `--v` flags.
+// `ABSL_VLOG_IS_ON(n)` is true, and `VLOG(n)` logs, if that effective verbosity
+// level is greater than or equal to `n`.
+//
+// `--vmodule` takes a comma-delimited list of key=value pairs.  Each key is a
+// pattern matched against filenames, and the values give the effective severity
+// level applied to matching files.  '?' and '*' characters in patterns are
+// interpreted as single-character and zero-or-more-character wildcards.
+// Patterns including a slash character are matched against full pathnames,
+// while those without are matched against basenames only.  One suffix (i.e. the
+// last . and everything after it) is stripped from each filename prior to
+// matching, as is the special suffix "-inl".
+//
+// Files are matched against globs in `--vmodule` in order, and the first match
+// determines the verbosity level.
+//
+// Files which do not match any pattern in `--vmodule` use the value of `--v` as
+// their effective verbosity level.  The default is 0.
+//
+// SetVLogLevel helper function is provided to do limited dynamic control over
+// V-logging by appending to `--vmodule`. Because these go at the beginning of
+// the list, they take priority over any globs previously added.
+//
+// Resetting --vmodule will override all previous modifications to `--vmodule`,
+// including via SetVLogLevel.
+
+#ifndef ABSL_LOG_ABSL_VLOG_IS_ON_H_
+#define ABSL_LOG_ABSL_VLOG_IS_ON_H_
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/vlog_config.h"  // IWYU pragma: export
+#include "absl/strings/string_view.h"
+
+// IWYU pragma: private, include "absl/log/log.h"
+
+// This is expanded at the callsite to allow the compiler to optimize
+// always-false cases out of the build.
+// An ABSL_MAX_VLOG_VERBOSITY of 2 means that VLOG(3) and above should never
+// log.
+#ifdef ABSL_MAX_VLOG_VERBOSITY
+#define ABSL_LOG_INTERNAL_MAX_LOG_VERBOSITY_CHECK(x) \
+  ((x) <= ABSL_MAX_VLOG_VERBOSITY)&&
+#else
+#define ABSL_LOG_INTERNAL_MAX_LOG_VERBOSITY_CHECK(x)
+#endif
+
+// Each ABSL_VLOG_IS_ON call site gets its own VLogSite that registers with the
+// global linked list of sites to asynchronously update its verbosity level on
+// changes to --v or --vmodule. The verbosity can also be set by manually
+// calling SetVLogLevel.
+//
+// ABSL_VLOG_IS_ON is not async signal safe, but it is guaranteed not to
+// allocate new memory.
+#define ABSL_VLOG_IS_ON(verbose_level)                                     \
+  (ABSL_LOG_INTERNAL_MAX_LOG_VERBOSITY_CHECK(verbose_level)[]()            \
+       ->::absl::log_internal::VLogSite *                                  \
+   {                                                                       \
+     ABSL_CONST_INIT static ::absl::log_internal::VLogSite site(__FILE__); \
+     return &site;                                                         \
+   }()                                                                     \
+       ->IsEnabled(verbose_level))
+
+#endif  // ABSL_LOG_ABSL_VLOG_IS_ON_H_

Pods/abseil/absl/log/check.h

@@ -0,0 +1,209 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/check.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of `CHECK` macros.
+//
+// `CHECK` macros terminate the program with a fatal error if the specified
+// condition is not true.
+//
+// Except for those whose names begin with `DCHECK`, these macros are not
+// controlled by `NDEBUG` (cf. `assert`), so the check will be executed
+// regardless of compilation mode. `CHECK` and friends are thus useful for
+// confirming invariants in situations where continuing to run would be worse
+// than terminating, e.g., due to risk of data corruption or security
+// compromise.  It is also more robust and portable to deliberately terminate
+// at a particular place with a useful message and backtrace than to assume some
+// ultimately unspecified and unreliable crashing behavior (such as a
+// "segmentation fault").
+
+#ifndef ABSL_LOG_CHECK_H_
+#define ABSL_LOG_CHECK_H_
+
+#include "absl/log/internal/check_impl.h"
+#include "absl/log/internal/check_op.h"     // IWYU pragma: export
+#include "absl/log/internal/conditions.h"   // IWYU pragma: export
+#include "absl/log/internal/log_message.h"  // IWYU pragma: export
+#include "absl/log/internal/strip.h"        // IWYU pragma: export
+
+// CHECK()
+//
+// `CHECK` terminates the program with a fatal error if `condition` is not true.
+//
+// The message may include additional information such as stack traces, when
+// available.
+//
+// Example:
+//
+//   CHECK(!cheese.empty()) << "Out of Cheese";
+//
+// Might produce a message like:
+//
+//   Check failed: !cheese.empty() Out of Cheese
+#define CHECK(condition) ABSL_LOG_INTERNAL_CHECK_IMPL((condition), #condition)
+
+// QCHECK()
+//
+// `QCHECK` behaves like `CHECK` but does not print a full stack trace and does
+// not run registered error handlers (as `QFATAL`).  It is useful when the
+// problem is definitely unrelated to program flow, e.g. when validating user
+// input.
+#define QCHECK(condition) ABSL_LOG_INTERNAL_QCHECK_IMPL((condition), #condition)
+
+// PCHECK()
+//
+// `PCHECK` behaves like `CHECK` but appends a description of the current state
+// of `errno` to the failure message.
+//
+// Example:
+//
+//   int fd = open("/var/empty/missing", O_RDONLY);
+//   PCHECK(fd != -1) << "posix is difficult";
+//
+// Might produce a message like:
+//
+//   Check failed: fd != -1 posix is difficult: No such file or directory [2]
+#define PCHECK(condition) ABSL_LOG_INTERNAL_PCHECK_IMPL((condition), #condition)
+
+// DCHECK()
+//
+// `DCHECK` behaves like `CHECK` in debug mode and does nothing otherwise (as
+// `DLOG`).  Unlike with `CHECK` (but as with `assert`), it is not safe to rely
+// on evaluation of `condition`: when `NDEBUG` is enabled, DCHECK does not
+// evaluate the condition.
+#define DCHECK(condition) ABSL_LOG_INTERNAL_DCHECK_IMPL((condition), #condition)
+
+// `CHECK_EQ` and friends are syntactic sugar for `CHECK(x == y)` that
+// automatically output the expression being tested and the evaluated values on
+// either side.
+//
+// Example:
+//
+//   int x = 3, y = 5;
+//   CHECK_EQ(2 * x, y) << "oops!";
+//
+// Might produce a message like:
+//
+//   Check failed: 2 * x == y (6 vs. 5) oops!
+//
+// The values must implement the appropriate comparison operator as well as
+// `operator<<(std::ostream&, ...)`.  Care is taken to ensure that each
+// argument is evaluated exactly once, and that anything which is legal to pass
+// as a function argument is legal here.  In particular, the arguments may be
+// temporary expressions which will end up being destroyed at the end of the
+// statement,
+//
+// Example:
+//
+//   CHECK_EQ(std::string("abc")[1], 'b');
+//
+// WARNING: Passing `NULL` as an argument to `CHECK_EQ` and similar macros does
+// not compile.  Use `nullptr` instead.
+#define CHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define CHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define CHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define CHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define CHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define CHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_CHECK_GT_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define QCHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_QCHECK_GT_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_EQ(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_EQ_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_NE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_NE_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_LE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_LE_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_LT(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_LT_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_GE(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_GE_IMPL((val1), #val1, (val2), #val2)
+#define DCHECK_GT(val1, val2) \
+  ABSL_LOG_INTERNAL_DCHECK_GT_IMPL((val1), #val1, (val2), #val2)
+
+// `CHECK_OK` and friends validate that the provided `absl::Status` or
+// `absl::StatusOr<T>` is OK.  If it isn't, they print a failure message that
+// includes the actual status and terminate the program.
+//
+// As with all `DCHECK` variants, `DCHECK_OK` has no effect (not even
+// evaluating its argument) if `NDEBUG` is enabled.
+//
+// Example:
+//
+//   CHECK_OK(FunctionReturnsStatus(x, y, z)) << "oops!";
+//
+// Might produce a message like:
+//
+//   Check failed: FunctionReturnsStatus(x, y, z) is OK (ABORTED: timeout) oops!
+#define CHECK_OK(status) ABSL_LOG_INTERNAL_CHECK_OK_IMPL((status), #status)
+#define QCHECK_OK(status) ABSL_LOG_INTERNAL_QCHECK_OK_IMPL((status), #status)
+#define DCHECK_OK(status) ABSL_LOG_INTERNAL_DCHECK_OK_IMPL((status), #status)
+
+// `CHECK_STREQ` and friends provide `CHECK_EQ` functionality for C strings,
+// i.e., null-terminated char arrays.  The `CASE` versions are case-insensitive.
+//
+// Example:
+//
+//   CHECK_STREQ(argv[0], "./skynet");
+//
+// Note that both arguments may be temporary strings which are destroyed by the
+// compiler at the end of the current full expression.
+//
+// Example:
+//
+//   CHECK_STREQ(Foo().c_str(), Bar().c_str());
+#define CHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define CHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define CHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define CHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+#define QCHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define QCHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define QCHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define QCHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_QCHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+#define DCHECK_STREQ(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STREQ_IMPL((s1), #s1, (s2), #s2)
+#define DCHECK_STRNE(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRNE_IMPL((s1), #s1, (s2), #s2)
+#define DCHECK_STRCASEEQ(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRCASEEQ_IMPL((s1), #s1, (s2), #s2)
+#define DCHECK_STRCASENE(s1, s2) \
+  ABSL_LOG_INTERNAL_DCHECK_STRCASENE_IMPL((s1), #s1, (s2), #s2)
+
+#endif  // ABSL_LOG_CHECK_H_

Pods/abseil/absl/log/globals.cc

@@ -0,0 +1,178 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/globals.h"
+
+#include <atomic>
+#include <cstddef>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/atomic_hook.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/hash/hash.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace {
+
+// These atomics represent logging library configuration.
+// Integer types are used instead of absl::LogSeverity to ensure that a
+// lock-free std::atomic is used when possible.
+ABSL_CONST_INIT std::atomic<int> min_log_level{
+    static_cast<int>(absl::LogSeverityAtLeast::kInfo)};
+ABSL_CONST_INIT std::atomic<int> stderrthreshold{
+    static_cast<int>(absl::LogSeverityAtLeast::kError)};
+// We evaluate this value as a hash comparison to avoid having to
+// hold a mutex or make a copy (to access the value of a string-typed flag) in
+// very hot codepath.
+ABSL_CONST_INIT std::atomic<size_t> log_backtrace_at_hash{0};
+ABSL_CONST_INIT std::atomic<bool> prepend_log_prefix{true};
+
+constexpr char kDefaultAndroidTag[] = "native";
+ABSL_CONST_INIT std::atomic<const char*> android_log_tag{kDefaultAndroidTag};
+
+ABSL_INTERNAL_ATOMIC_HOOK_ATTRIBUTES
+absl::base_internal::AtomicHook<log_internal::LoggingGlobalsListener>
+    logging_globals_listener;
+
+size_t HashSiteForLogBacktraceAt(absl::string_view file, int line) {
+  return absl::HashOf(file, line);
+}
+
+void TriggerLoggingGlobalsListener() {
+  auto* listener = logging_globals_listener.Load();
+  if (listener != nullptr) listener();
+}
+
+}  // namespace
+
+namespace log_internal {
+
+void RawSetMinLogLevel(absl::LogSeverityAtLeast severity) {
+  min_log_level.store(static_cast<int>(severity), std::memory_order_release);
+}
+
+void RawSetStderrThreshold(absl::LogSeverityAtLeast severity) {
+  stderrthreshold.store(static_cast<int>(severity), std::memory_order_release);
+}
+
+void RawEnableLogPrefix(bool on_off) {
+  prepend_log_prefix.store(on_off, std::memory_order_release);
+}
+
+void SetLoggingGlobalsListener(LoggingGlobalsListener l) {
+  logging_globals_listener.Store(l);
+}
+
+}  // namespace log_internal
+
+absl::LogSeverityAtLeast MinLogLevel() {
+  return static_cast<absl::LogSeverityAtLeast>(
+      min_log_level.load(std::memory_order_acquire));
+}
+
+void SetMinLogLevel(absl::LogSeverityAtLeast severity) {
+  log_internal::RawSetMinLogLevel(severity);
+  TriggerLoggingGlobalsListener();
+}
+
+namespace log_internal {
+
+ScopedMinLogLevel::ScopedMinLogLevel(absl::LogSeverityAtLeast severity)
+    : saved_severity_(absl::MinLogLevel()) {
+  absl::SetMinLogLevel(severity);
+}
+ScopedMinLogLevel::~ScopedMinLogLevel() {
+  absl::SetMinLogLevel(saved_severity_);
+}
+
+}  // namespace log_internal
+
+absl::LogSeverityAtLeast StderrThreshold() {
+  return static_cast<absl::LogSeverityAtLeast>(
+      stderrthreshold.load(std::memory_order_acquire));
+}
+
+void SetStderrThreshold(absl::LogSeverityAtLeast severity) {
+  log_internal::RawSetStderrThreshold(severity);
+  TriggerLoggingGlobalsListener();
+}
+
+ScopedStderrThreshold::ScopedStderrThreshold(absl::LogSeverityAtLeast severity)
+    : saved_severity_(absl::StderrThreshold()) {
+  absl::SetStderrThreshold(severity);
+}
+
+ScopedStderrThreshold::~ScopedStderrThreshold() {
+  absl::SetStderrThreshold(saved_severity_);
+}
+
+namespace log_internal {
+
+const char* GetAndroidNativeTag() {
+  return android_log_tag.load(std::memory_order_acquire);
+}
+
+}  // namespace log_internal
+
+void SetAndroidNativeTag(const char* tag) {
+  ABSL_CONST_INIT static std::atomic<const std::string*> user_log_tag(nullptr);
+  ABSL_INTERNAL_CHECK(tag, "tag must be non-null.");
+
+  const std::string* tag_str = new std::string(tag);
+  ABSL_INTERNAL_CHECK(
+      android_log_tag.exchange(tag_str->c_str(), std::memory_order_acq_rel) ==
+          kDefaultAndroidTag,
+      "SetAndroidNativeTag() must only be called once per process!");
+  user_log_tag.store(tag_str, std::memory_order_relaxed);
+}
+
+namespace log_internal {
+
+bool ShouldLogBacktraceAt(absl::string_view file, int line) {
+  const size_t flag_hash =
+      log_backtrace_at_hash.load(std::memory_order_relaxed);
+
+  return flag_hash != 0 && flag_hash == HashSiteForLogBacktraceAt(file, line);
+}
+
+}  // namespace log_internal
+
+void SetLogBacktraceLocation(absl::string_view file, int line) {
+  log_backtrace_at_hash.store(HashSiteForLogBacktraceAt(file, line),
+                              std::memory_order_relaxed);
+}
+
+void ClearLogBacktraceLocation() {
+  log_backtrace_at_hash.store(0, std::memory_order_relaxed);
+}
+
+bool ShouldPrependLogPrefix() {
+  return prepend_log_prefix.load(std::memory_order_acquire);
+}
+
+void EnableLogPrefix(bool on_off) {
+  log_internal::RawEnableLogPrefix(on_off);
+  TriggerLoggingGlobalsListener();
+}
+
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/globals.h

@@ -0,0 +1,231 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/globals.h
+// -----------------------------------------------------------------------------
+//
+// This header declares global logging library configuration knobs.
+
+#ifndef ABSL_LOG_GLOBALS_H_
+#define ABSL_LOG_GLOBALS_H_
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/vlog_config.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+//------------------------------------------------------------------------------
+//  Minimum Log Level
+//------------------------------------------------------------------------------
+//
+// Messages logged at or above this severity are directed to all registered log
+// sinks or skipped otherwise. This parameter can also be modified using
+// command line flag --minloglevel.
+// See absl/base/log_severity.h for descriptions of severity levels.
+
+// MinLogLevel()
+//
+// Returns the value of the Minimum Log Level parameter.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT absl::LogSeverityAtLeast MinLogLevel();
+
+// SetMinLogLevel()
+//
+// Updates the value of Minimum Log Level parameter.
+// This function is async-signal-safe.
+void SetMinLogLevel(absl::LogSeverityAtLeast severity);
+
+namespace log_internal {
+
+// ScopedMinLogLevel
+//
+// RAII type used to temporarily update the Min Log Level parameter.
+class ScopedMinLogLevel final {
+ public:
+  explicit ScopedMinLogLevel(absl::LogSeverityAtLeast severity);
+  ScopedMinLogLevel(const ScopedMinLogLevel&) = delete;
+  ScopedMinLogLevel& operator=(const ScopedMinLogLevel&) = delete;
+  ~ScopedMinLogLevel();
+
+ private:
+  absl::LogSeverityAtLeast saved_severity_;
+};
+
+}  // namespace log_internal
+
+//------------------------------------------------------------------------------
+// Stderr Threshold
+//------------------------------------------------------------------------------
+//
+// Messages logged at or above this level are directed to stderr in
+// addition to other registered log sinks. This parameter can also be modified
+// using command line flag --stderrthreshold.
+// See absl/base/log_severity.h for descriptions of severity levels.
+
+// StderrThreshold()
+//
+// Returns the value of the Stderr Threshold parameter.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT absl::LogSeverityAtLeast StderrThreshold();
+
+// SetStderrThreshold()
+//
+// Updates the Stderr Threshold parameter.
+// This function is async-signal-safe.
+void SetStderrThreshold(absl::LogSeverityAtLeast severity);
+inline void SetStderrThreshold(absl::LogSeverity severity) {
+  absl::SetStderrThreshold(static_cast<absl::LogSeverityAtLeast>(severity));
+}
+
+// ScopedStderrThreshold
+//
+// RAII type used to temporarily update the Stderr Threshold parameter.
+class ScopedStderrThreshold final {
+ public:
+  explicit ScopedStderrThreshold(absl::LogSeverityAtLeast severity);
+  ScopedStderrThreshold(const ScopedStderrThreshold&) = delete;
+  ScopedStderrThreshold& operator=(const ScopedStderrThreshold&) = delete;
+  ~ScopedStderrThreshold();
+
+ private:
+  absl::LogSeverityAtLeast saved_severity_;
+};
+
+//------------------------------------------------------------------------------
+// Log Backtrace At
+//------------------------------------------------------------------------------
+//
+// Users can request an existing `LOG` statement, specified by file and line
+// number, to also include a backtrace when logged.
+
+// ShouldLogBacktraceAt()
+//
+// Returns true if we should log a backtrace at the specified location.
+namespace log_internal {
+ABSL_MUST_USE_RESULT bool ShouldLogBacktraceAt(absl::string_view file,
+                                               int line);
+}  // namespace log_internal
+
+// SetLogBacktraceLocation()
+//
+// Sets the location the backtrace should be logged at.  If the specified
+// location isn't a `LOG` statement, the effect will be the same as
+// `ClearLogBacktraceLocation` (but less efficient).
+void SetLogBacktraceLocation(absl::string_view file, int line);
+
+// ClearLogBacktraceLocation()
+//
+// Clears the set location so that backtraces will no longer be logged at it.
+void ClearLogBacktraceLocation();
+
+//------------------------------------------------------------------------------
+// Prepend Log Prefix
+//------------------------------------------------------------------------------
+//
+// This option tells the logging library that every logged message
+// should include the prefix (severity, date, time, PID, etc.)
+//
+// ShouldPrependLogPrefix()
+//
+// Returns the value of the Prepend Log Prefix option.
+// This function is async-signal-safe.
+ABSL_MUST_USE_RESULT bool ShouldPrependLogPrefix();
+
+// EnableLogPrefix()
+//
+// Updates the value of the Prepend Log Prefix option.
+// This function is async-signal-safe.
+void EnableLogPrefix(bool on_off);
+
+//------------------------------------------------------------------------------
+// `VLOG` Configuration
+//------------------------------------------------------------------------------
+//
+// These methods set the `(ABSL_)VLOG(_IS_ON)` threshold.  They allow
+// programmatic control of the thresholds set by the --v and --vmodule flags.
+//
+// Only `VLOG`s with a severity level LESS THAN OR EQUAL TO the threshold will
+// be evaluated.
+//
+// For example, if the threshold is 2, then:
+//
+//   VLOG(2) << "This message will be logged.";
+//   VLOG(3) << "This message will NOT be logged.";
+//
+// The default threshold is 0. Since `VLOG` levels must not be negative, a
+// negative threshold value will turn off all VLOGs.
+
+// SetGlobalVLogLevel()
+//
+// Sets the global `VLOG` level to threshold. Returns the previous global
+// threshold.
+inline int SetGlobalVLogLevel(int threshold) {
+  return absl::log_internal::UpdateGlobalVLogLevel(threshold);
+}
+
+// SetVLogLevel()
+//
+// Sets the `VLOG` threshold for all files that match `module_pattern`,
+// overwriting any prior value. Files that don't match aren't affected.
+// Returns the threshold that previously applied to `module_pattern`.
+inline int SetVLogLevel(absl::string_view module_pattern, int threshold) {
+  return absl::log_internal::PrependVModule(module_pattern, threshold);
+}
+
+//------------------------------------------------------------------------------
+// Configure Android Native Log Tag
+//------------------------------------------------------------------------------
+//
+// The logging library forwards to the Android system log API when built for
+// Android.  That API takes a string "tag" value in addition to a message and
+// severity level.  The tag is used to identify the source of messages and to
+// filter them.  This library uses the tag "native" by default.
+
+// SetAndroidNativeTag()
+//
+// Stores a copy of the string pointed to by `tag` and uses it as the Android
+// logging tag thereafter. `tag` must not be null.
+// This function must not be called more than once!
+void SetAndroidNativeTag(const char* tag);
+
+namespace log_internal {
+// GetAndroidNativeTag()
+//
+// Returns the configured Android logging tag.
+const char* GetAndroidNativeTag();
+}  // namespace log_internal
+
+namespace log_internal {
+
+using LoggingGlobalsListener = void (*)();
+void SetLoggingGlobalsListener(LoggingGlobalsListener l);
+
+// Internal implementation for the setter routines. These are used
+// to break circular dependencies between flags and globals. Each "Raw"
+// routine corresponds to the non-"Raw" counterpart and used to set the
+// configuration parameter directly without calling back to the listener.
+void RawSetMinLogLevel(absl::LogSeverityAtLeast severity);
+void RawSetStderrThreshold(absl::LogSeverityAtLeast severity);
+void RawEnableLogPrefix(bool on_off);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_GLOBALS_H_

Pods/abseil/absl/log/internal/append_truncated.h

@@ -0,0 +1,47 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_
+#define ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_
+
+#include <cstddef>
+#include <cstring>
+
+#include "absl/base/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+// Copies into `dst` as many bytes of `src` as will fit, then truncates the
+// copied bytes from the front of `dst` and returns the number of bytes written.
+inline size_t AppendTruncated(absl::string_view src, absl::Span<char> &dst) {
+  if (src.size() > dst.size()) src = src.substr(0, dst.size());
+  memcpy(dst.data(), src.data(), src.size());
+  dst.remove_prefix(src.size());
+  return src.size();
+}
+// Likewise, but `n` copies of `c`.
+inline size_t AppendTruncated(char c, size_t n, absl::Span<char> &dst) {
+  if (n > dst.size()) n = dst.size();
+  memset(dst.data(), c, n);
+  dst.remove_prefix(n);
+  return n;
+}
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_APPEND_TRUNCATED_H_

Pods/abseil/absl/log/internal/check_impl.h

@@ -0,0 +1,150 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_LOG_INTERNAL_CHECK_IMPL_H_
+#define ABSL_LOG_INTERNAL_CHECK_IMPL_H_
+
+#include "absl/base/optimization.h"
+#include "absl/log/internal/check_op.h"
+#include "absl/log/internal/conditions.h"
+#include "absl/log/internal/log_message.h"
+#include "absl/log/internal/strip.h"
+
+// CHECK
+#define ABSL_LOG_INTERNAL_CHECK_IMPL(condition, condition_text)       \
+  ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS,                        \
+                                    ABSL_PREDICT_FALSE(!(condition))) \
+  ABSL_LOG_INTERNAL_CHECK(condition_text).InternalStream()
+
+#define ABSL_LOG_INTERNAL_QCHECK_IMPL(condition, condition_text)       \
+  ABSL_LOG_INTERNAL_CONDITION_QFATAL(STATELESS,                        \
+                                     ABSL_PREDICT_FALSE(!(condition))) \
+  ABSL_LOG_INTERNAL_QCHECK(condition_text).InternalStream()
+
+#define ABSL_LOG_INTERNAL_PCHECK_IMPL(condition, condition_text) \
+  ABSL_LOG_INTERNAL_CHECK_IMPL(condition, condition_text).WithPerror()
+
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_IMPL(condition, condition_text) \
+  ABSL_LOG_INTERNAL_CHECK_IMPL(condition, condition_text)
+#else
+#define ABSL_LOG_INTERNAL_DCHECK_IMPL(condition, condition_text) \
+  ABSL_LOG_INTERNAL_CHECK_IMPL(true || (condition), "true")
+#endif
+
+// CHECK_EQ
+#define ABSL_LOG_INTERNAL_CHECK_EQ_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_EQ, ==, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_CHECK_NE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_NE, !=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_CHECK_LE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_LE, <=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_CHECK_LT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_LT, <, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_CHECK_GE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_GE, >=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_CHECK_GT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_OP(Check_GT, >, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_EQ_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_EQ, ==, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_NE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_NE, !=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_LE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_LE, <=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_LT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_LT, <, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_GE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_GE, >=, val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_GT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OP(Check_GT, >, val1, val1_text, val2, val2_text)
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_EQ_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_EQ_IMPL(val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_NE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_NE_IMPL(val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_LE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_LE_IMPL(val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_LT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_LT_IMPL(val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_GE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_GE_IMPL(val1, val1_text, val2, val2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_GT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_CHECK_GT_IMPL(val1, val1_text, val2, val2_text)
+#else  // ndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_EQ_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define ABSL_LOG_INTERNAL_DCHECK_NE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define ABSL_LOG_INTERNAL_DCHECK_LE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define ABSL_LOG_INTERNAL_DCHECK_LT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define ABSL_LOG_INTERNAL_DCHECK_GE_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#define ABSL_LOG_INTERNAL_DCHECK_GT_IMPL(val1, val1_text, val2, val2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(val1, val2)
+#endif  // def NDEBUG
+
+// CHECK_OK
+#define ABSL_LOG_INTERNAL_CHECK_OK_IMPL(status, status_text) \
+  ABSL_LOG_INTERNAL_CHECK_OK(status, status_text)
+#define ABSL_LOG_INTERNAL_QCHECK_OK_IMPL(status, status_text) \
+  ABSL_LOG_INTERNAL_QCHECK_OK(status, status_text)
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_OK_IMPL(status, status_text) \
+  ABSL_LOG_INTERNAL_CHECK_OK(status, status_text)
+#else
+#define ABSL_LOG_INTERNAL_DCHECK_OK_IMPL(status, status_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(status, nullptr)
+#endif
+
+// CHECK_STREQ
+#define ABSL_LOG_INTERNAL_CHECK_STREQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcmp, ==, true, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_CHECK_STRNE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcmp, !=, false, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_CHECK_STRCASEEQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcasecmp, ==, true, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_CHECK_STRCASENE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STROP(strcasecmp, !=, false, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_STREQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcmp, ==, true, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_STRNE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcmp, !=, false, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_STRCASEEQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcasecmp, ==, true, s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_QCHECK_STRCASENE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_QCHECK_STROP(strcasecmp, !=, false, s1, s1_text, s2,  \
+                                 s2_text)
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_STREQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STREQ_IMPL(s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_STRCASEEQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASEEQ_IMPL(s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_STRNE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STRNE_IMPL(s1, s1_text, s2, s2_text)
+#define ABSL_LOG_INTERNAL_DCHECK_STRCASENE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_CHECK_STRCASENE_IMPL(s1, s1_text, s2, s2_text)
+#else  // ndef NDEBUG
+#define ABSL_LOG_INTERNAL_DCHECK_STREQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define ABSL_LOG_INTERNAL_DCHECK_STRCASEEQ_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define ABSL_LOG_INTERNAL_DCHECK_STRNE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#define ABSL_LOG_INTERNAL_DCHECK_STRCASENE_IMPL(s1, s1_text, s2, s2_text) \
+  ABSL_LOG_INTERNAL_DCHECK_NOP(s1, s2)
+#endif  // def NDEBUG
+
+#endif  // ABSL_LOG_INTERNAL_CHECK_IMPL_H_

Pods/abseil/absl/log/internal/check_op.cc

@@ -0,0 +1,138 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/check_op.h"
+
+#include <string.h>
+
+#include <ostream>
+
+#include "absl/strings/string_view.h"
+
+#ifdef _MSC_VER
+#define strcasecmp _stricmp
+#else
+#include <strings.h>  // for strcasecmp, but msvc does not have this header
+#endif
+
+#include <sstream>
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/strings/str_cat.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+#define ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(x) \
+  template std::string* MakeCheckOpString(x, x, const char*)
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(bool);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(int64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(uint64_t);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(float);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(double);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(unsigned char);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const std::string&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const absl::string_view&);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const signed char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const unsigned char*);
+ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING(const void*);
+#undef ABSL_LOGGING_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING
+
+CheckOpMessageBuilder::CheckOpMessageBuilder(const char* exprtext) {
+  stream_ << exprtext << " (";
+}
+
+std::ostream& CheckOpMessageBuilder::ForVar2() {
+  stream_ << " vs. ";
+  return stream_;
+}
+
+std::string* CheckOpMessageBuilder::NewString() {
+  stream_ << ")";
+  return new std::string(stream_.str());
+}
+
+void MakeCheckOpValueString(std::ostream& os, const char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const signed char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "signed char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const unsigned char v) {
+  if (v >= 32 && v <= 126) {
+    os << "'" << v << "'";
+  } else {
+    os << "unsigned char value " << int{v};
+  }
+}
+
+void MakeCheckOpValueString(std::ostream& os, const void* p) {
+  if (p == nullptr) {
+    os << "(null)";
+  } else {
+    os << p;
+  }
+}
+
+// Helper functions for string comparisons.
+#define DEFINE_CHECK_STROP_IMPL(name, func, expected)                      \
+  std::string* Check##func##expected##Impl(const char* s1, const char* s2, \
+                                           const char* exprtext) {         \
+    bool equal = s1 == s2 || (s1 && s2 && !func(s1, s2));                  \
+    if (equal == expected) {                                               \
+      return nullptr;                                                      \
+    } else {                                                               \
+      return new std::string(                                              \
+          absl::StrCat(exprtext, " (", s1, " vs. ", s2, ")"));             \
+    }                                                                      \
+  }
+DEFINE_CHECK_STROP_IMPL(CHECK_STREQ, strcmp, true)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRNE, strcmp, false)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRCASEEQ, strcasecmp, true)
+DEFINE_CHECK_STROP_IMPL(CHECK_STRCASENE, strcasecmp, false)
+#undef DEFINE_CHECK_STROP_IMPL
+
+namespace detect_specialization {
+
+StringifySink::StringifySink(std::ostream& os) : os_(os) {}
+
+void StringifySink::Append(absl::string_view text) { os_ << text; }
+
+void StringifySink::Append(size_t length, char ch) {
+  for (size_t i = 0; i < length; ++i) os_.put(ch);
+}
+
+void AbslFormatFlush(StringifySink* sink, absl::string_view text) {
+  sink->Append(text);
+}
+
+}  // namespace detect_specialization
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/check_op.h

@@ -0,0 +1,462 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/check_op.h
+// -----------------------------------------------------------------------------
+//
+// This file declares helpers routines and macros used to implement `CHECK`
+// macros.
+
+#ifndef ABSL_LOG_INTERNAL_CHECK_OP_H_
+#define ABSL_LOG_INTERNAL_CHECK_OP_H_
+
+#include <stdint.h>
+
+#include <cstddef>
+#include <ostream>
+#include <sstream>
+#include <string>
+#include <type_traits>
+#include <utility>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/log/internal/nullguard.h"
+#include "absl/log/internal/nullstream.h"
+#include "absl/log/internal/strip.h"
+#include "absl/strings/has_absl_stringify.h"
+#include "absl/strings/string_view.h"
+
+// `ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL` wraps string literals that
+// should be stripped when `ABSL_MIN_LOG_LEVEL` exceeds `kFatal`.
+#ifdef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(literal)         \
+  (::absl::LogSeverity::kFatal >=                               \
+           static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+       ? (literal)                                              \
+       : "")
+#else
+#define ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(literal) (literal)
+#endif
+
+#ifdef NDEBUG
+// `NDEBUG` is defined, so `DCHECK_EQ(x, y)` and so on do nothing.  However, we
+// still want the compiler to parse `x` and `y`, because we don't want to lose
+// potentially useful errors and warnings.
+#define ABSL_LOG_INTERNAL_DCHECK_NOP(x, y)   \
+  while (false && ((void)(x), (void)(y), 0)) \
+  ::absl::log_internal::NullStream().InternalStream()
+#endif
+
+#define ABSL_LOG_INTERNAL_CHECK_OP(name, op, val1, val1_text, val2, val2_text) \
+  while (::std::string* absl_log_internal_check_op_result                      \
+             ABSL_LOG_INTERNAL_ATTRIBUTE_UNUSED_IF_STRIP_LOG =                 \
+                 ::absl::log_internal::name##Impl(                             \
+                     ::absl::log_internal::GetReferenceableValue(val1),        \
+                     ::absl::log_internal::GetReferenceableValue(val2),        \
+                     ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(                   \
+                         val1_text " " #op " " val2_text)))                    \
+    ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS, true)                         \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_op_result).InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_OP(name, op, val1, val1_text, val2, \
+                                    val2_text)                       \
+  while (::std::string* absl_log_internal_qcheck_op_result =         \
+             ::absl::log_internal::name##Impl(                       \
+                 ::absl::log_internal::GetReferenceableValue(val1),  \
+                 ::absl::log_internal::GetReferenceableValue(val2),  \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(             \
+                     val1_text " " #op " " val2_text)))              \
+    ABSL_LOG_INTERNAL_CONDITION_QFATAL(STATELESS, true)              \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_qcheck_op_result).InternalStream()
+#define ABSL_LOG_INTERNAL_CHECK_STROP(func, op, expected, s1, s1_text, s2,     \
+                                      s2_text)                                 \
+  while (::std::string* absl_log_internal_check_strop_result =                 \
+             ::absl::log_internal::Check##func##expected##Impl(                \
+                 (s1), (s2),                                                   \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(s1_text " " #op        \
+                                                                " " s2_text))) \
+    ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS, true)                         \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_strop_result)               \
+      .InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_STROP(func, op, expected, s1, s1_text, s2,    \
+                                       s2_text)                                \
+  while (::std::string* absl_log_internal_qcheck_strop_result =                \
+             ::absl::log_internal::Check##func##expected##Impl(                \
+                 (s1), (s2),                                                   \
+                 ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(s1_text " " #op        \
+                                                                " " s2_text))) \
+    ABSL_LOG_INTERNAL_CONDITION_QFATAL(STATELESS, true)                        \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_qcheck_strop_result)             \
+      .InternalStream()
+// This one is tricky:
+// * We must evaluate `val` exactly once, yet we need to do two things with it:
+//   evaluate `.ok()` and (sometimes) `.ToString()`.
+// * `val` might be an `absl::Status` or some `absl::StatusOr<T>`.
+// * `val` might be e.g. `ATemporary().GetStatus()`, which may return a
+//   reference to a member of `ATemporary` that is only valid until the end of
+//   the full expression.
+// * We don't want this file to depend on `absl::Status` `#include`s or linkage,
+//   nor do we want to move the definition to status and introduce a dependency
+//   in the other direction.  We can be assured that callers must already have a
+//   `Status` and the necessary `#include`s and linkage.
+// * Callsites should be small and fast (at least when `val.ok()`): one branch,
+//   minimal stack footprint.
+//   * In particular, the string concat stuff should be out-of-line and emitted
+//     in only one TU to save linker input size
+// * We want the `val.ok()` check inline so static analyzers and optimizers can
+//   see it.
+// * As usual, no braces so we can stream into the expansion with `operator<<`.
+// * Also as usual, it must expand to a single (partial) statement with no
+//   ambiguous-else problems.
+// * When stripped by `ABSL_MIN_LOG_LEVEL`, we must discard the `<expr> is OK`
+//   string literal and abort without doing any streaming.  We don't need to
+//   strip the call to stringify the non-ok `Status` as long as we don't log it;
+//   dropping the `Status`'s message text is out of scope.
+#define ABSL_LOG_INTERNAL_CHECK_OK(val, val_text)                        \
+  for (::std::pair<const ::absl::Status*, ::std::string*>                \
+           absl_log_internal_check_ok_goo;                               \
+       absl_log_internal_check_ok_goo.first =                            \
+           ::absl::log_internal::AsStatus(val),                          \
+       absl_log_internal_check_ok_goo.second =                           \
+           ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok()) \
+               ? nullptr                                                 \
+               : ::absl::status_internal::MakeCheckFailString(           \
+                     absl_log_internal_check_ok_goo.first,               \
+                     ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(val_text     \
+                                                            " is OK")),  \
+       !ABSL_PREDICT_TRUE(absl_log_internal_check_ok_goo.first->ok());)  \
+    ABSL_LOG_INTERNAL_CONDITION_FATAL(STATELESS, true)                   \
+  ABSL_LOG_INTERNAL_CHECK(*absl_log_internal_check_ok_goo.second)        \
+      .InternalStream()
+#define ABSL_LOG_INTERNAL_QCHECK_OK(val, val_text)                        \
+  for (::std::pair<const ::absl::Status*, ::std::string*>                 \
+           absl_log_internal_qcheck_ok_goo;                               \
+       absl_log_internal_qcheck_ok_goo.first =                            \
+           ::absl::log_internal::AsStatus(val),                           \
+       absl_log_internal_qcheck_ok_goo.second =                           \
+           ABSL_PREDICT_TRUE(absl_log_internal_qcheck_ok_goo.first->ok()) \
+               ? nullptr                                                  \
+               : ::absl::status_internal::MakeCheckFailString(            \
+                     absl_log_internal_qcheck_ok_goo.first,               \
+                     ABSL_LOG_INTERNAL_STRIP_STRING_LITERAL(val_text      \
+                                                            " is OK")),   \
+       !ABSL_PREDICT_TRUE(absl_log_internal_qcheck_ok_goo.first->ok());)  \
+    ABSL_LOG_INTERNAL_CONDITION_QFATAL(STATELESS, true)                   \
+  ABSL_LOG_INTERNAL_QCHECK(*absl_log_internal_qcheck_ok_goo.second)       \
+      .InternalStream()
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+class Status;
+template <typename T>
+class StatusOr;
+
+namespace status_internal {
+ABSL_ATTRIBUTE_PURE_FUNCTION std::string* MakeCheckFailString(
+    const absl::Status* status, const char* prefix);
+}  // namespace status_internal
+
+namespace log_internal {
+
+// Convert a Status or a StatusOr to its underlying status value.
+//
+// (This implementation does not require a dep on absl::Status to work.)
+inline const absl::Status* AsStatus(const absl::Status& s) { return &s; }
+template <typename T>
+const absl::Status* AsStatus(const absl::StatusOr<T>& s) {
+  return &s.status();
+}
+
+// A helper class for formatting `expr (V1 vs. V2)` in a `CHECK_XX` statement.
+// See `MakeCheckOpString` for sample usage.
+class CheckOpMessageBuilder final {
+ public:
+  // Inserts `exprtext` and ` (` to the stream.
+  explicit CheckOpMessageBuilder(const char* exprtext);
+  ~CheckOpMessageBuilder() = default;
+  // For inserting the first variable.
+  std::ostream& ForVar1() { return stream_; }
+  // For inserting the second variable (adds an intermediate ` vs. `).
+  std::ostream& ForVar2();
+  // Get the result (inserts the closing `)`).
+  std::string* NewString();
+
+ private:
+  std::ostringstream stream_;
+};
+
+// This formats a value for a failing `CHECK_XX` statement.  Ordinarily, it uses
+// the definition for `operator<<`, with a few special cases below.
+template <typename T>
+inline void MakeCheckOpValueString(std::ostream& os, const T& v) {
+  os << log_internal::NullGuard<T>::Guard(v);
+}
+
+// Overloads for char types provide readable values for unprintable characters.
+void MakeCheckOpValueString(std::ostream& os, char v);
+void MakeCheckOpValueString(std::ostream& os, signed char v);
+void MakeCheckOpValueString(std::ostream& os, unsigned char v);
+void MakeCheckOpValueString(std::ostream& os, const void* p);
+
+namespace detect_specialization {
+
+// MakeCheckOpString is being specialized for every T and U pair that is being
+// passed to the CHECK_op macros. However, there is a lot of redundancy in these
+// specializations that creates unnecessary library and binary bloat.
+// The number of instantiations tends to be O(n^2) because we have two
+// independent inputs. This technique works by reducing `n`.
+//
+// Most user-defined types being passed to CHECK_op end up being printed as a
+// builtin type. For example, enums tend to be implicitly converted to its
+// underlying type when calling operator<<, and pointers are printed with the
+// `const void*` overload.
+// To reduce the number of instantiations we coerce these values before calling
+// MakeCheckOpString instead of inside it.
+//
+// To detect if this coercion is needed, we duplicate all the relevant
+// operator<< overloads as specified in the standard, just in a different
+// namespace. If the call to `stream << value` becomes ambiguous, it means that
+// one of these overloads is the one selected by overload resolution. We then
+// do overload resolution again just with our overload set to see which one gets
+// selected. That tells us which type to coerce to.
+// If the augmented call was not ambiguous, it means that none of these were
+// selected and we can't coerce the input.
+//
+// As a secondary step to reduce code duplication, we promote integral types to
+// their 64-bit variant. This does not change the printed value, but reduces the
+// number of instantiations even further. Promoting an integer is very cheap at
+// the call site.
+int64_t operator<<(std::ostream&, short value);           // NOLINT
+int64_t operator<<(std::ostream&, unsigned short value);  // NOLINT
+int64_t operator<<(std::ostream&, int value);
+int64_t operator<<(std::ostream&, unsigned int value);
+int64_t operator<<(std::ostream&, long value);                 // NOLINT
+uint64_t operator<<(std::ostream&, unsigned long value);       // NOLINT
+int64_t operator<<(std::ostream&, long long value);            // NOLINT
+uint64_t operator<<(std::ostream&, unsigned long long value);  // NOLINT
+float operator<<(std::ostream&, float value);
+double operator<<(std::ostream&, double value);
+long double operator<<(std::ostream&, long double value);
+bool operator<<(std::ostream&, bool value);
+const void* operator<<(std::ostream&, const void* value);
+const void* operator<<(std::ostream&, std::nullptr_t);
+
+// These `char` overloads are specified like this in the standard, so we have to
+// write them exactly the same to ensure the call is ambiguous.
+// If we wrote it in a different way (eg taking std::ostream instead of the
+// template) then one call might have a higher rank than the other and it would
+// not be ambiguous.
+template <typename Traits>
+char operator<<(std::basic_ostream<char, Traits>&, char);
+template <typename Traits>
+signed char operator<<(std::basic_ostream<char, Traits>&, signed char);
+template <typename Traits>
+unsigned char operator<<(std::basic_ostream<char, Traits>&, unsigned char);
+template <typename Traits>
+const char* operator<<(std::basic_ostream<char, Traits>&, const char*);
+template <typename Traits>
+const signed char* operator<<(std::basic_ostream<char, Traits>&,
+                              const signed char*);
+template <typename Traits>
+const unsigned char* operator<<(std::basic_ostream<char, Traits>&,
+                                const unsigned char*);
+
+// This overload triggers when the call is not ambiguous.
+// It means that T is being printed with some overload not on this list.
+// We keep the value as `const T&`.
+template <typename T, typename = decltype(std::declval<std::ostream&>()
+                                          << std::declval<const T&>())>
+const T& Detect(int);
+
+// This overload triggers when the call is ambiguous.
+// It means that T is either one from this list or printed as one from this
+// list. Eg an enum that decays to `int` for printing.
+// We ask the overload set to give us the type we want to convert it to.
+template <typename T>
+decltype(detect_specialization::operator<<(std::declval<std::ostream&>(),
+                                           std::declval<const T&>()))
+Detect(char);
+
+// A sink for AbslStringify which redirects everything to a std::ostream.
+class StringifySink {
+ public:
+  explicit StringifySink(std::ostream& os ABSL_ATTRIBUTE_LIFETIME_BOUND);
+
+  void Append(absl::string_view text);
+  void Append(size_t length, char ch);
+  friend void AbslFormatFlush(StringifySink* sink, absl::string_view text);
+
+ private:
+  std::ostream& os_;
+};
+
+// Wraps a type implementing AbslStringify, and implements operator<<.
+template <typename T>
+class StringifyToStreamWrapper {
+ public:
+  explicit StringifyToStreamWrapper(const T& v ABSL_ATTRIBUTE_LIFETIME_BOUND)
+      : v_(v) {}
+
+  friend std::ostream& operator<<(std::ostream& os,
+                                  const StringifyToStreamWrapper& wrapper) {
+    StringifySink sink(os);
+    AbslStringify(sink, wrapper.v_);
+    return os;
+  }
+
+ private:
+  const T& v_;
+};
+
+// This overload triggers when T implements AbslStringify.
+// StringifyToStreamWrapper is used to allow MakeCheckOpString to use
+// operator<<.
+template <typename T>
+std::enable_if_t<HasAbslStringify<T>::value,
+                 StringifyToStreamWrapper<T>>
+Detect(...);  // Ellipsis has lowest preference when int passed.
+}  // namespace detect_specialization
+
+template <typename T>
+using CheckOpStreamType = decltype(detect_specialization::Detect<T>(0));
+
+// Build the error message string.  Specify no inlining for code size.
+template <typename T1, typename T2>
+ABSL_ATTRIBUTE_RETURNS_NONNULL std::string* MakeCheckOpString(
+    T1 v1, T2 v2, const char* exprtext) ABSL_ATTRIBUTE_NOINLINE;
+
+template <typename T1, typename T2>
+std::string* MakeCheckOpString(T1 v1, T2 v2, const char* exprtext) {
+  CheckOpMessageBuilder comb(exprtext);
+  MakeCheckOpValueString(comb.ForVar1(), v1);
+  MakeCheckOpValueString(comb.ForVar2(), v2);
+  return comb.NewString();
+}
+
+// Add a few commonly used instantiations as extern to reduce size of objects
+// files.
+#define ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(x) \
+  extern template std::string* MakeCheckOpString(x, x, const char*)
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(bool);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(int64_t);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(uint64_t);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(float);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(double);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(char);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(unsigned char);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const std::string&);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const absl::string_view&);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const signed char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const unsigned char*);
+ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN(const void*);
+#undef ABSL_LOG_INTERNAL_DEFINE_MAKE_CHECK_OP_STRING_EXTERN
+
+// `ABSL_LOG_INTERNAL_CHECK_OP_IMPL_RESULT` skips formatting the Check_OP result
+// string iff `ABSL_MIN_LOG_LEVEL` exceeds `kFatal`, instead returning an empty
+// string.
+#ifdef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_CHECK_OP_IMPL_RESULT(U1, U2, v1, v2, exprtext) \
+  ((::absl::LogSeverity::kFatal >=                                       \
+    static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))                \
+       ? MakeCheckOpString<U1, U2>(v1, v2, exprtext)                     \
+       : new std::string())
+#else
+#define ABSL_LOG_INTERNAL_CHECK_OP_IMPL_RESULT(U1, U2, v1, v2, exprtext) \
+  MakeCheckOpString<U1, U2>(v1, v2, exprtext)
+#endif
+
+// Helper functions for `ABSL_LOG_INTERNAL_CHECK_OP` macro family.  The
+// `(int, int)` override works around the issue that the compiler will not
+// instantiate the template version of the function on values of unnamed enum
+// type.
+#define ABSL_LOG_INTERNAL_CHECK_OP_IMPL(name, op)                          \
+  template <typename T1, typename T2>                                      \
+  inline constexpr ::std::string* name##Impl(const T1& v1, const T2& v2,   \
+                                             const char* exprtext) {       \
+    using U1 = CheckOpStreamType<T1>;                                      \
+    using U2 = CheckOpStreamType<T2>;                                      \
+    return ABSL_PREDICT_TRUE(v1 op v2)                                     \
+               ? nullptr                                                   \
+               : ABSL_LOG_INTERNAL_CHECK_OP_IMPL_RESULT(U1, U2, U1(v1),    \
+                                                        U2(v2), exprtext); \
+  }                                                                        \
+  inline constexpr ::std::string* name##Impl(int v1, int v2,               \
+                                             const char* exprtext) {       \
+    return name##Impl<int, int>(v1, v2, exprtext);                         \
+  }
+
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_EQ, ==)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_NE, !=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_LE, <=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_LT, <)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_GE, >=)
+ABSL_LOG_INTERNAL_CHECK_OP_IMPL(Check_GT, >)
+#undef ABSL_LOG_INTERNAL_CHECK_OP_IMPL_RESULT
+#undef ABSL_LOG_INTERNAL_CHECK_OP_IMPL
+
+std::string* CheckstrcmptrueImpl(const char* s1, const char* s2,
+                                 const char* exprtext);
+std::string* CheckstrcmpfalseImpl(const char* s1, const char* s2,
+                                  const char* exprtext);
+std::string* CheckstrcasecmptrueImpl(const char* s1, const char* s2,
+                                     const char* exprtext);
+std::string* CheckstrcasecmpfalseImpl(const char* s1, const char* s2,
+                                      const char* exprtext);
+
+// `CHECK_EQ` and friends want to pass their arguments by reference, however
+// this winds up exposing lots of cases where people have defined and
+// initialized static const data members but never declared them (i.e. in a .cc
+// file), meaning they are not referenceable.  This function avoids that problem
+// for integers (the most common cases) by overloading for every primitive
+// integer type, even the ones we discourage, and returning them by value.
+template <typename T>
+inline constexpr const T& GetReferenceableValue(const T& t) {
+  return t;
+}
+inline constexpr char GetReferenceableValue(char t) { return t; }
+inline constexpr unsigned char GetReferenceableValue(unsigned char t) {
+  return t;
+}
+inline constexpr signed char GetReferenceableValue(signed char t) { return t; }
+inline constexpr short GetReferenceableValue(short t) { return t; }  // NOLINT
+inline constexpr unsigned short GetReferenceableValue(               // NOLINT
+    unsigned short t) {                                              // NOLINT
+  return t;
+}
+inline constexpr int GetReferenceableValue(int t) { return t; }
+inline constexpr unsigned int GetReferenceableValue(unsigned int t) {
+  return t;
+}
+inline constexpr long GetReferenceableValue(long t) { return t; }  // NOLINT
+inline constexpr unsigned long GetReferenceableValue(              // NOLINT
+    unsigned long t) {                                             // NOLINT
+  return t;
+}
+inline constexpr long long GetReferenceableValue(long long t) {  // NOLINT
+  return t;
+}
+inline constexpr unsigned long long GetReferenceableValue(  // NOLINT
+    unsigned long long t) {                                 // NOLINT
+  return t;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CHECK_OP_H_

Pods/abseil/absl/log/internal/conditions.cc

@@ -0,0 +1,83 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/conditions.h"
+
+#include <atomic>
+#include <cstdint>
+
+#include "absl/base/config.h"
+#include "absl/base/internal/cycleclock.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// The following code behaves like AtomicStatsCounter::LossyAdd() for
+// speed since it is fine to lose occasional updates.
+// Returns old value of *counter.
+uint32_t LossyIncrement(std::atomic<uint32_t>* counter) {
+  const uint32_t value = counter->load(std::memory_order_relaxed);
+  counter->store(value + 1, std::memory_order_relaxed);
+  return value;
+}
+
+}  // namespace
+
+bool LogEveryNState::ShouldLog(int n) {
+  return n > 0 && (LossyIncrement(&counter_) % static_cast<uint32_t>(n)) == 0;
+}
+
+bool LogFirstNState::ShouldLog(int n) {
+  const uint32_t counter_value = counter_.load(std::memory_order_relaxed);
+  if (static_cast<int64_t>(counter_value) < n) {
+    counter_.store(counter_value + 1, std::memory_order_relaxed);
+    return true;
+  }
+  return false;
+}
+
+bool LogEveryPow2State::ShouldLog() {
+  const uint32_t new_value = LossyIncrement(&counter_) + 1;
+  return (new_value & (new_value - 1)) == 0;
+}
+
+bool LogEveryNSecState::ShouldLog(double seconds) {
+  using absl::base_internal::CycleClock;
+  LossyIncrement(&counter_);
+  const int64_t now_cycles = CycleClock::Now();
+  int64_t next_cycles = next_log_time_cycles_.load(std::memory_order_relaxed);
+#if defined(__myriad2__)
+  // myriad2 does not have 8-byte compare and exchange.  Use a racy version that
+  // is "good enough" but will over-log in the face of concurrent logging.
+  if (now_cycles > next_cycles) {
+    next_log_time_cycles_.store(now_cycles + seconds * CycleClock::Frequency(),
+                                std::memory_order_relaxed);
+    return true;
+  }
+  return false;
+#else
+  do {
+    if (now_cycles <= next_cycles) return false;
+  } while (!next_log_time_cycles_.compare_exchange_weak(
+      next_cycles, now_cycles + seconds * CycleClock::Frequency(),
+      std::memory_order_relaxed, std::memory_order_relaxed));
+  return true;
+#endif
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/conditions.h

@@ -0,0 +1,239 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/conditions.h
+// -----------------------------------------------------------------------------
+//
+// This file contains implementation of conditional log statements, like LOG_IF
+// including all the ABSL_LOG_INTERNAL_..._CONDITION_... macros and
+// various condition classes like LogEveryNState.
+
+#ifndef ABSL_LOG_INTERNAL_CONDITIONS_H_
+#define ABSL_LOG_INTERNAL_CONDITIONS_H_
+
+#if defined(_WIN32) || defined(__hexagon__)
+#include <cstdlib>
+#else
+#include <unistd.h>
+#endif
+#include <stdlib.h>
+
+#include <atomic>
+#include <cstdint>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/log/internal/voidify.h"
+
+// `ABSL_LOG_INTERNAL_CONDITION` prefixes another macro that expands to a
+// temporary `LogMessage` instantiation followed by zero or more streamed
+// expressions.  This definition is tricky to read correctly.  It evaluates to
+// either
+//
+//   (void)0;
+//
+// or
+//
+//   ::absl::log_internal::Voidify() &&
+//       ::absl::log_internal::LogMessage(...) << "the user's message";
+//
+// If the condition is evaluable at compile time, as is often the case, it
+// compiles away to just one side or the other.
+//
+// Although this is not used anywhere a statement (e.g. `if`) could not go,
+// the ternary expression does a better job avoiding spurious diagnostics
+// (dangling else, missing switch case) and preserving noreturn semantics (e.g.
+// on `LOG(FATAL)`) without requiring braces.
+//
+// The `switch` ensures that this expansion is the beginning of a statement (as
+// opposed to an expression) and prevents shenanigans like
+// `AFunction(LOG(INFO))` and `decltype(LOG(INFO))`.  The apparently-redundant
+// `default` case makes the condition more amenable to Clang dataflow analysis.
+#define ABSL_LOG_INTERNAL_STATELESS_CONDITION(condition) \
+  switch (0)                                             \
+  case 0:                                                \
+  default:                                               \
+    !(condition) ? (void)0 : ::absl::log_internal::Voidify()&&
+
+// `ABSL_LOG_INTERNAL_STATEFUL_CONDITION` applies a condition like
+// `ABSL_LOG_INTERNAL_STATELESS_CONDITION` but adds to that a series of variable
+// declarations, including a local static object which stores the state needed
+// to implement the stateful macros like `LOG_EVERY_N`.
+//
+// `for`-loops are used to declare scoped variables without braces (to permit
+// streaming into the macro's expansion) and without the dangling-`else`
+// problems/diagnostics that come with `if`.
+//
+// Two more variables are declared in separate `for`-loops:
+//
+// * `COUNTER` implements a streamable token whose value when streamed is the
+//   number of times execution has passed through the macro.
+// * A boolean flag is used to prevent any of the `for`-loops from ever actually
+//   looping.
+#define ABSL_LOG_INTERNAL_STATEFUL_CONDITION(condition)             \
+  for (bool absl_log_internal_stateful_condition_do_log(condition); \
+       absl_log_internal_stateful_condition_do_log;                 \
+       absl_log_internal_stateful_condition_do_log = false)         \
+  ABSL_LOG_INTERNAL_STATEFUL_CONDITION_IMPL
+#define ABSL_LOG_INTERNAL_STATEFUL_CONDITION_IMPL(kind, ...)              \
+  for (static ::absl::log_internal::Log##kind##State                      \
+           absl_log_internal_stateful_condition_state;                    \
+       absl_log_internal_stateful_condition_do_log &&                     \
+       absl_log_internal_stateful_condition_state.ShouldLog(__VA_ARGS__); \
+       absl_log_internal_stateful_condition_do_log = false)               \
+    for (const uint32_t COUNTER ABSL_ATTRIBUTE_UNUSED =                   \
+             absl_log_internal_stateful_condition_state.counter();        \
+         absl_log_internal_stateful_condition_do_log;                     \
+         absl_log_internal_stateful_condition_do_log = false)
+
+// `ABSL_LOG_INTERNAL_CONDITION_*` serve to combine any conditions from the
+// macro (e.g. `LOG_IF` or `VLOG`) with inherent conditions (e.g.
+// `ABSL_MIN_LOG_LEVEL`) into a single boolean expression.  We could chain
+// ternary operators instead, however some versions of Clang sometimes issue
+// spurious diagnostics after such expressions due to a control flow analysis
+// bug.
+#ifdef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_CONDITION_INFO(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                   \
+      (condition) && ::absl::LogSeverity::kInfo >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+#define ABSL_LOG_INTERNAL_CONDITION_WARNING(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                      \
+      (condition) && ::absl::LogSeverity::kWarning >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+#define ABSL_LOG_INTERNAL_CONDITION_ERROR(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                    \
+      (condition) && ::absl::LogSeverity::kError >=        \
+                         static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL))
+// NOTE: Use ternary operators instead of short-circuiting to mitigate
+// https://bugs.llvm.org/show_bug.cgi?id=51928.
+#define ABSL_LOG_INTERNAL_CONDITION_FATAL(type, condition)                 \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                                    \
+      ((condition)                                                         \
+           ? (::absl::LogSeverity::kFatal >=                               \
+                      static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+                  ? true                                                   \
+                  : (::absl::log_internal::AbortQuietly(), false))         \
+           : false))
+// NOTE: Use ternary operators instead of short-circuiting to mitigate
+// https://bugs.llvm.org/show_bug.cgi?id=51928.
+#define ABSL_LOG_INTERNAL_CONDITION_QFATAL(type, condition)                \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                                    \
+      ((condition)                                                         \
+           ? (::absl::LogSeverity::kFatal >=                               \
+                      static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) \
+                  ? true                                                   \
+                  : (::absl::log_internal::ExitQuietly(), false))          \
+           : false))
+#define ABSL_LOG_INTERNAL_CONDITION_DFATAL(type, condition)             \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(                                 \
+      (ABSL_ASSUME(absl::kLogDebugFatal == absl::LogSeverity::kError || \
+                   absl::kLogDebugFatal == absl::LogSeverity::kFatal),  \
+       (condition) &&                                                   \
+           (::absl::kLogDebugFatal >=                                   \
+                static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) || \
+            (::absl::kLogDebugFatal == ::absl::LogSeverity::kFatal &&   \
+             (::absl::log_internal::AbortQuietly(), false)))))
+
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL(severity)                            \
+  for (int absl_log_internal_severity_loop = 1;                                \
+       absl_log_internal_severity_loop; absl_log_internal_severity_loop = 0)   \
+    for (const absl::LogSeverity absl_log_internal_severity =                  \
+             ::absl::NormalizeLogSeverity(severity);                           \
+         absl_log_internal_severity_loop; absl_log_internal_severity_loop = 0) \
+  ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL(type, condition)          \
+  ABSL_LOG_INTERNAL_##type##_CONDITION((                                  \
+      (condition) &&                                                     \
+          (absl_log_internal_severity >=                                 \
+               static_cast<::absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) ||   \
+           (absl_log_internal_severity == ::absl::LogSeverity::kFatal && \
+            (::absl::log_internal::AbortQuietly(), false)))))
+#else  // ndef ABSL_MIN_LOG_LEVEL
+#define ABSL_LOG_INTERNAL_CONDITION_INFO(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_WARNING(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_ERROR(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_FATAL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_QFATAL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_DFATAL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL(severity)                            \
+  for (int absl_log_internal_severity_loop = 1;                                \
+       absl_log_internal_severity_loop; absl_log_internal_severity_loop = 0)   \
+    for (const absl::LogSeverity absl_log_internal_severity =                  \
+             ::absl::NormalizeLogSeverity(severity);                           \
+         absl_log_internal_severity_loop; absl_log_internal_severity_loop = 0) \
+  ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL
+#define ABSL_LOG_INTERNAL_CONDITION_LEVEL_IMPL(type, condition) \
+  ABSL_LOG_INTERNAL_##type##_CONDITION(condition)
+#endif  // ndef ABSL_MIN_LOG_LEVEL
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Stateful condition class name should be "Log" + name + "State".
+class LogEveryNState final {
+ public:
+  bool ShouldLog(int n);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogFirstNState final {
+ public:
+  bool ShouldLog(int n);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogEveryPow2State final {
+ public:
+  bool ShouldLog();
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+};
+
+class LogEveryNSecState final {
+ public:
+  bool ShouldLog(double seconds);
+  uint32_t counter() { return counter_.load(std::memory_order_relaxed); }
+
+ private:
+  std::atomic<uint32_t> counter_{0};
+  // Cycle count according to CycleClock that we should next log at.
+  std::atomic<int64_t> next_log_time_cycles_{0};
+};
+
+// Helper routines to abort the application quietly
+
+[[noreturn]] inline void AbortQuietly() { abort(); }
+[[noreturn]] inline void ExitQuietly() { _exit(1); }
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CONDITIONS_H_

Pods/abseil/absl/log/internal/config.h

@@ -0,0 +1,45 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/config.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_LOG_INTERNAL_CONFIG_H_
+#define ABSL_LOG_INTERNAL_CONFIG_H_
+
+#include "absl/base/config.h"
+
+#ifdef _WIN32
+#include <cstdint>
+#else
+#include <sys/types.h>
+#endif
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+#ifdef _WIN32
+using Tid = uint32_t;
+#else
+using Tid = pid_t;
+#endif
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_CONFIG_H_

Pods/abseil/absl/log/internal/fnmatch.cc

@@ -0,0 +1,73 @@
+// Copyright 2023 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/fnmatch.h"
+
+#include <cstddef>
+
+#include "absl/base/config.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+bool FNMatch(absl::string_view pattern, absl::string_view str) {
+  bool in_wildcard_match = false;
+  while (true) {
+    if (pattern.empty()) {
+      // `pattern` is exhausted; succeed if all of `str` was consumed matching
+      // it.
+      return in_wildcard_match || str.empty();
+    }
+    if (str.empty()) {
+      // `str` is exhausted; succeed if `pattern` is empty or all '*'s.
+      return pattern.find_first_not_of('*') == pattern.npos;
+    }
+    switch (pattern.front()) {
+      case '*':
+        pattern.remove_prefix(1);
+        in_wildcard_match = true;
+        break;
+      case '?':
+        pattern.remove_prefix(1);
+        str.remove_prefix(1);
+        break;
+      default:
+        if (in_wildcard_match) {
+          absl::string_view fixed_portion = pattern;
+          const size_t end = fixed_portion.find_first_of("*?");
+          if (end != fixed_portion.npos) {
+            fixed_portion = fixed_portion.substr(0, end);
+          }
+          const size_t match = str.find(fixed_portion);
+          if (match == str.npos) {
+            return false;
+          }
+          pattern.remove_prefix(fixed_portion.size());
+          str.remove_prefix(match + fixed_portion.size());
+          in_wildcard_match = false;
+        } else {
+          if (pattern.front() != str.front()) {
+            return false;
+          }
+          pattern.remove_prefix(1);
+          str.remove_prefix(1);
+        }
+        break;
+    }
+  }
+}
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/fnmatch.h

@@ -0,0 +1,35 @@
+// Copyright 2023 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_LOG_INTERNAL_FNMATCH_H_
+#define ABSL_LOG_INTERNAL_FNMATCH_H_
+
+#include "absl/base/config.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+// Like POSIX `fnmatch`, but:
+// * accepts `string_view`
+// * does not allocate any dynamic memory
+// * only supports * and ? wildcards and not bracket expressions [...]
+// * wildcards may match /
+// * no backslash-escaping
+bool FNMatch(absl::string_view pattern, absl::string_view str);
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_FNMATCH_H_

Pods/abseil/absl/log/internal/globals.cc

@@ -0,0 +1,145 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/globals.h"
+
+#include <atomic>
+#include <cstdio>
+
+#if defined(__EMSCRIPTEN__)
+#include <emscripten/console.h>
+#endif
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+#include "absl/strings/strip.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+// Keeps track of whether Logging initialization is finalized.
+// Log messages generated before that will go to stderr.
+ABSL_CONST_INIT std::atomic<bool> logging_initialized(false);
+
+// The TimeZone used for logging. This may only be set once.
+ABSL_CONST_INIT std::atomic<absl::TimeZone*> timezone_ptr{nullptr};
+
+// If true, the logging library will symbolize stack in fatal messages
+ABSL_CONST_INIT std::atomic<bool> symbolize_stack_trace(true);
+
+// Specifies maximum number of stack frames to report in fatal messages.
+ABSL_CONST_INIT std::atomic<int> max_frames_in_stack_trace(64);
+
+ABSL_CONST_INIT std::atomic<bool> exit_on_dfatal(true);
+ABSL_CONST_INIT std::atomic<bool> suppress_sigabort_trace(false);
+}  // namespace
+
+bool IsInitialized() {
+  return logging_initialized.load(std::memory_order_acquire);
+}
+
+void SetInitialized() {
+  logging_initialized.store(true, std::memory_order_release);
+}
+
+void WriteToStderr(absl::string_view message, absl::LogSeverity severity) {
+  if (message.empty()) return;
+#if defined(__EMSCRIPTEN__)
+  // In WebAssembly, bypass filesystem emulation via fwrite.
+  // Skip a trailing newline character as emscripten_errn adds one itself.
+  const auto message_minus_newline = absl::StripSuffix(message, "\n");
+  // emscripten_errn was introduced in 3.1.41 but broken in standalone mode
+  // until 3.1.43.
+#if ABSL_INTERNAL_EMSCRIPTEN_VERSION >= 3001043
+  emscripten_errn(message_minus_newline.data(), message_minus_newline.size());
+#else
+  std::string null_terminated_message(message_minus_newline);
+  _emscripten_err(null_terminated_message.c_str());
+#endif
+#else
+  // Avoid using std::cerr from this module since we may get called during
+  // exit code, and cerr may be partially or fully destroyed by then.
+  std::fwrite(message.data(), message.size(), 1, stderr);
+#endif
+
+#if defined(_WIN64) || defined(_WIN32) || defined(_WIN16)
+  // C99 requires stderr to not be fully-buffered by default (7.19.3.7), but
+  // MS CRT buffers it anyway, so we must `fflush` to ensure the string hits
+  // the console/file before the program dies (and takes the libc buffers
+  // with it).
+  // https://docs.microsoft.com/en-us/cpp/c-runtime-library/stream-i-o
+  if (severity >= absl::LogSeverity::kWarning) {
+    std::fflush(stderr);
+  }
+#else
+  // Avoid unused parameter warning in this branch.
+  (void)severity;
+#endif
+}
+
+void SetTimeZone(absl::TimeZone tz) {
+  absl::TimeZone* expected = nullptr;
+  absl::TimeZone* new_tz = new absl::TimeZone(tz);
+  // timezone_ptr can only be set once, otherwise new_tz is leaked.
+  if (!timezone_ptr.compare_exchange_strong(expected, new_tz,
+                                            std::memory_order_release,
+                                            std::memory_order_relaxed)) {
+    ABSL_RAW_LOG(FATAL,
+                 "absl::log_internal::SetTimeZone() has already been called");
+  }
+}
+
+const absl::TimeZone* TimeZone() {
+  return timezone_ptr.load(std::memory_order_acquire);
+}
+
+bool ShouldSymbolizeLogStackTrace() {
+  return symbolize_stack_trace.load(std::memory_order_acquire);
+}
+
+void EnableSymbolizeLogStackTrace(bool on_off) {
+  symbolize_stack_trace.store(on_off, std::memory_order_release);
+}
+
+int MaxFramesInLogStackTrace() {
+  return max_frames_in_stack_trace.load(std::memory_order_acquire);
+}
+
+void SetMaxFramesInLogStackTrace(int max_num_frames) {
+  max_frames_in_stack_trace.store(max_num_frames, std::memory_order_release);
+}
+
+bool ExitOnDFatal() { return exit_on_dfatal.load(std::memory_order_acquire); }
+
+void SetExitOnDFatal(bool on_off) {
+  exit_on_dfatal.store(on_off, std::memory_order_release);
+}
+
+bool SuppressSigabortTrace() {
+  return suppress_sigabort_trace.load(std::memory_order_acquire);
+}
+
+bool SetSuppressSigabortTrace(bool on_off) {
+  return suppress_sigabort_trace.exchange(on_off);
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/globals.h

@@ -0,0 +1,101 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/globals.h
+// -----------------------------------------------------------------------------
+//
+// This header file contains various global objects and static helper routines
+// use in logging implementation.
+
+#ifndef ABSL_LOG_INTERNAL_GLOBALS_H_
+#define ABSL_LOG_INTERNAL_GLOBALS_H_
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// IsInitialized returns true if the logging library is initialized.
+// This function is async-signal-safe
+bool IsInitialized();
+
+// SetLoggingInitialized is called once after logging initialization is done.
+void SetInitialized();
+
+// Unconditionally write a `message` to stderr. If `severity` exceeds kInfo
+// we also flush the stderr stream.
+void WriteToStderr(absl::string_view message, absl::LogSeverity severity);
+
+// Set the TimeZone used for human-friendly times (for example, the log message
+// prefix) printed by the logging library. This may only be called once.
+void SetTimeZone(absl::TimeZone tz);
+
+// Returns the TimeZone used for human-friendly times (for example, the log
+// message prefix) printed by the logging library Returns nullptr prior to
+// initialization.
+const absl::TimeZone* TimeZone();
+
+// Returns true if stack traces emitted by the logging library should be
+// symbolized. This function is async-signal-safe.
+bool ShouldSymbolizeLogStackTrace();
+
+// Enables or disables symbolization of stack traces emitted by the
+// logging library. This function is async-signal-safe.
+void EnableSymbolizeLogStackTrace(bool on_off);
+
+// Returns the maximum number of frames that appear in stack traces
+// emitted by the logging library. This function is async-signal-safe.
+int MaxFramesInLogStackTrace();
+
+// Sets the maximum number of frames that appear in stack traces emitted by
+// the logging library. This function is async-signal-safe.
+void SetMaxFramesInLogStackTrace(int max_num_frames);
+
+// Determines whether we exit the program for a LOG(DFATAL) message in
+// debug mode.  It does this by skipping the call to Fail/FailQuietly.
+// This is intended for testing only.
+//
+// This can have some effects on LOG(FATAL) as well. Failure messages
+// are always allocated (rather than sharing a buffer), the crash
+// reason is not recorded, the "gwq" status message is not updated,
+// and the stack trace is not recorded.  The LOG(FATAL) *will* still
+// exit the program. Since this function is used only in testing,
+// these differences are acceptable.
+//
+// Additionally, LOG(LEVEL(FATAL)) is indistinguishable from LOG(DFATAL) and
+// will not terminate the program if SetExitOnDFatal(false) has been called.
+bool ExitOnDFatal();
+
+// SetExitOnDFatal() sets the ExitOnDFatal() status
+void SetExitOnDFatal(bool on_off);
+
+// Determines if the logging library should suppress logging of stacktraces in
+// the `SIGABRT` handler, typically because we just logged a stacktrace as part
+// of `LOG(FATAL)` and are about to send ourselves a `SIGABRT` to end the
+// program.
+bool SuppressSigabortTrace();
+
+// Sets the SuppressSigabortTrace() status and returns the previous state.
+bool SetSuppressSigabortTrace(bool on_off);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_GLOBALS_H_

Pods/abseil/absl/log/internal/log_format.cc

@@ -0,0 +1,205 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_format.h"
+
+#include <string.h>
+
+#ifdef _MSC_VER
+#include <winsock2.h>  // For timeval
+#else
+#include <sys/time.h>
+#endif
+
+#include <cstddef>
+#include <cstdint>
+#include <limits>
+#include <string>
+#include <type_traits>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/base/optimization.h"
+#include "absl/log/internal/append_truncated.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// This templated function avoids compiler warnings about tautological
+// comparisons when log_internal::Tid is unsigned. It can be replaced with a
+// constexpr if once the minimum C++ version Abseil supports is C++17.
+template <typename T>
+inline std::enable_if_t<!std::is_signed<T>::value>
+PutLeadingWhitespace(T tid, char*& p) {
+  if (tid < 10) *p++ = ' ';
+  if (tid < 100) *p++ = ' ';
+  if (tid < 1000) *p++ = ' ';
+  if (tid < 10000) *p++ = ' ';
+  if (tid < 100000) *p++ = ' ';
+  if (tid < 1000000) *p++ = ' ';
+}
+
+template <typename T>
+inline std::enable_if_t<std::is_signed<T>::value>
+PutLeadingWhitespace(T tid, char*& p) {
+  if (tid >= 0 && tid < 10) *p++ = ' ';
+  if (tid > -10 && tid < 100) *p++ = ' ';
+  if (tid > -100 && tid < 1000) *p++ = ' ';
+  if (tid > -1000 && tid < 10000) *p++ = ' ';
+  if (tid > -10000 && tid < 100000) *p++ = ' ';
+  if (tid > -100000 && tid < 1000000) *p++ = ' ';
+}
+
+// The fields before the filename are all fixed-width except for the thread ID,
+// which is of bounded width.
+size_t FormatBoundedFields(absl::LogSeverity severity, absl::Time timestamp,
+                           log_internal::Tid tid, absl::Span<char>& buf) {
+  constexpr size_t kBoundedFieldsMaxLen =
+      sizeof("SMMDD HH:MM:SS.NNNNNN  ") +
+      (1 + std::numeric_limits<log_internal::Tid>::digits10 + 1) - sizeof("");
+  if (ABSL_PREDICT_FALSE(buf.size() < kBoundedFieldsMaxLen)) {
+    // We don't bother trying to truncate these fields if the buffer is too
+    // short (or almost too short) because it would require doing a lot more
+    // length checking (slow) and it should never happen.  A 15kB buffer should
+    // be enough for anyone.  Instead we mark `buf` full without writing
+    // anything.
+    buf.remove_suffix(buf.size());
+    return 0;
+  }
+
+  // We can't call absl::LocalTime(), localtime_r(), or anything else here that
+  // isn't async-signal-safe. We can only use the time zone if it has already
+  // been loaded.
+  const absl::TimeZone* tz = absl::log_internal::TimeZone();
+  if (ABSL_PREDICT_FALSE(tz == nullptr)) {
+    // If a time zone hasn't been set yet because we are logging before the
+    // logging library has been initialized, we fallback to a simpler, slower
+    // method. Just report the raw Unix time in seconds. We cram this into the
+    // normal time format for the benefit of parsers.
+    auto tv = absl::ToTimeval(timestamp);
+    int snprintf_result = absl::SNPrintF(
+        buf.data(), buf.size(), "%c0000 00:00:%02d.%06d %7d ",
+        absl::LogSeverityName(severity)[0], static_cast<int>(tv.tv_sec),
+        static_cast<int>(tv.tv_usec), static_cast<int>(tid));
+    if (snprintf_result >= 0) {
+      buf.remove_prefix(static_cast<size_t>(snprintf_result));
+      return static_cast<size_t>(snprintf_result);
+    }
+    return 0;
+  }
+
+  char* p = buf.data();
+  *p++ = absl::LogSeverityName(severity)[0];
+  const absl::TimeZone::CivilInfo ci = tz->At(timestamp);
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(ci.cs.month()), p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(ci.cs.day()), p);
+  p += 2;
+  *p++ = ' ';
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(ci.cs.hour()), p);
+  p += 2;
+  *p++ = ':';
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(ci.cs.minute()),
+                                       p);
+  p += 2;
+  *p++ = ':';
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(ci.cs.second()),
+                                       p);
+  p += 2;
+  *p++ = '.';
+  const int64_t usecs = absl::ToInt64Microseconds(ci.subsecond);
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(usecs / 10000), p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(usecs / 100 % 100),
+                                       p);
+  p += 2;
+  absl::numbers_internal::PutTwoDigits(static_cast<uint32_t>(usecs % 100), p);
+  p += 2;
+  *p++ = ' ';
+  PutLeadingWhitespace(tid, p);
+  p = absl::numbers_internal::FastIntToBuffer(tid, p);
+  *p++ = ' ';
+  const size_t bytes_formatted = static_cast<size_t>(p - buf.data());
+  buf.remove_prefix(bytes_formatted);
+  return bytes_formatted;
+}
+
+size_t FormatLineNumber(int line, absl::Span<char>& buf) {
+  constexpr size_t kLineFieldMaxLen =
+      sizeof(":] ") + (1 + std::numeric_limits<int>::digits10 + 1) - sizeof("");
+  if (ABSL_PREDICT_FALSE(buf.size() < kLineFieldMaxLen)) {
+    // As above, we don't bother trying to truncate this if the buffer is too
+    // short and it should never happen.
+    buf.remove_suffix(buf.size());
+    return 0;
+  }
+  char* p = buf.data();
+  *p++ = ':';
+  p = absl::numbers_internal::FastIntToBuffer(line, p);
+  *p++ = ']';
+  *p++ = ' ';
+  const size_t bytes_formatted = static_cast<size_t>(p - buf.data());
+  buf.remove_prefix(bytes_formatted);
+  return bytes_formatted;
+}
+
+}  // namespace
+
+std::string FormatLogMessage(absl::LogSeverity severity,
+                             absl::CivilSecond civil_second,
+                             absl::Duration subsecond, log_internal::Tid tid,
+                             absl::string_view basename, int line,
+                             PrefixFormat format, absl::string_view message) {
+  return absl::StrFormat(
+      "%c%02d%02d %02d:%02d:%02d.%06d %7d %s:%d] %s%s",
+      absl::LogSeverityName(severity)[0], civil_second.month(),
+      civil_second.day(), civil_second.hour(), civil_second.minute(),
+      civil_second.second(), absl::ToInt64Microseconds(subsecond), tid,
+      basename, line, format == PrefixFormat::kRaw ? "RAW: " : "", message);
+}
+
+// This method is fairly hot, and the library always passes a huge `buf`, so we
+// save some bounds-checking cycles by not trying to do precise truncation.
+// Truncating at a field boundary is probably a better UX anyway.
+//
+// The prefix is written in three parts, each of which does a single
+// bounds-check and truncation:
+// 1. severity, timestamp, and thread ID
+// 2. filename
+// 3. line number and bracket
+size_t FormatLogPrefix(absl::LogSeverity severity, absl::Time timestamp,
+                       log_internal::Tid tid, absl::string_view basename,
+                       int line, PrefixFormat format, absl::Span<char>& buf) {
+  auto prefix_size = FormatBoundedFields(severity, timestamp, tid, buf);
+  prefix_size += log_internal::AppendTruncated(basename, buf);
+  prefix_size += FormatLineNumber(line, buf);
+  if (format == PrefixFormat::kRaw)
+    prefix_size += log_internal::AppendTruncated("RAW: ", buf);
+  return prefix_size;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/log_format.h

@@ -0,0 +1,78 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_format.h
+// -----------------------------------------------------------------------------
+//
+// This file declares routines implementing formatting of log message and log
+// prefix.
+
+#ifndef ABSL_LOG_INTERNAL_LOG_FORMAT_H_
+#define ABSL_LOG_INTERNAL_LOG_FORMAT_H_
+
+#include <stddef.h>
+
+#include <string>
+
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/civil_time.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+enum class PrefixFormat {
+  kNotRaw,
+  kRaw,
+};
+
+// Formats log message based on provided data.
+std::string FormatLogMessage(absl::LogSeverity severity,
+                             absl::CivilSecond civil_second,
+                             absl::Duration subsecond, log_internal::Tid tid,
+                             absl::string_view basename, int line,
+                             PrefixFormat format, absl::string_view message);
+
+// Formats various entry metadata into a text string meant for use as a
+// prefix on a log message string.  Writes into `buf`, advances `buf` to point
+// at the remainder of the buffer (i.e. past any written bytes), and returns the
+// number of bytes written.
+//
+// In addition to calling `buf->remove_prefix()` (or the equivalent), this
+// function may also do `buf->remove_suffix(buf->size())` in cases where no more
+// bytes (i.e. no message data) should be written into the buffer.  For example,
+// if the prefix ought to be:
+//   I0926 09:00:00.000000 1234567 foo.cc:123]
+// `buf` is too small, the function might fill the whole buffer:
+//   I0926 09:00:00.000000 1234
+// (note the apparrently incorrect thread ID), or it might write less:
+//   I0926 09:00:00.000000
+// In this case, it might also empty `buf` prior to returning to prevent
+// message data from being written into the space where a reader would expect to
+// see a thread ID.
+size_t FormatLogPrefix(absl::LogSeverity severity, absl::Time timestamp,
+                       log_internal::Tid tid, absl::string_view basename,
+                       int line, PrefixFormat format, absl::Span<char>& buf);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_LOG_FORMAT_H_

Pods/abseil/absl/log/internal/log_impl.h

@@ -0,0 +1,282 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_LOG_INTERNAL_LOG_IMPL_H_
+#define ABSL_LOG_INTERNAL_LOG_IMPL_H_
+
+#include "absl/log/absl_vlog_is_on.h"
+#include "absl/log/internal/conditions.h"
+#include "absl/log/internal/log_message.h"
+#include "absl/log/internal/strip.h"
+
+// ABSL_LOG()
+#define ABSL_LOG_INTERNAL_LOG_IMPL(severity)             \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, true) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+// ABSL_PLOG()
+#define ABSL_LOG_INTERNAL_PLOG_IMPL(severity)              \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, true)   \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream() \
+          .WithPerror()
+
+// ABSL_DLOG()
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_IMPL(severity)            \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, true) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#else
+#define ABSL_LOG_INTERNAL_DLOG_IMPL(severity)             \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, false) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#endif
+
+// The `switch` ensures that this expansion is the beginning of a statement (as
+// opposed to an expression). The use of both `case 0` and `default` is to
+// suppress a compiler warning.
+#define ABSL_LOG_INTERNAL_VLOG_IMPL(verbose_level)                         \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level)) \
+  case 0:                                                                  \
+  default:                                                                 \
+    ABSL_LOG_INTERNAL_LOG_IF_IMPL(                                         \
+        _INFO, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))       \
+        .WithVerbosity(absl_logging_internal_verbose_level)
+
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DVLOG_IMPL(verbose_level)                        \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level)) \
+  case 0:                                                                  \
+  default:                                                                 \
+    ABSL_LOG_INTERNAL_DLOG_IF_IMPL(                                         \
+        _INFO, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))       \
+        .WithVerbosity(absl_logging_internal_verbose_level)
+#else
+#define ABSL_LOG_INTERNAL_DVLOG_IMPL(verbose_level)                           \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level))    \
+  case 0:                                                                     \
+  default:                                                                    \
+    ABSL_LOG_INTERNAL_DLOG_IF_IMPL(                                            \
+        _INFO, false && ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level)) \
+        .WithVerbosity(absl_logging_internal_verbose_level)
+#endif
+
+#define ABSL_LOG_INTERNAL_LOG_IF_IMPL(severity, condition)    \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+#define ABSL_LOG_INTERNAL_PLOG_IF_IMPL(severity, condition)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()    \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_IF_IMPL(severity, condition)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, condition) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#else
+#define ABSL_LOG_INTERNAL_DLOG_IF_IMPL(severity, condition)              \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATELESS, false && (condition)) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#endif
+
+// ABSL_LOG_EVERY_N
+#define ABSL_LOG_INTERNAL_LOG_EVERY_N_IMPL(severity, n)            \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+// ABSL_LOG_FIRST_N
+#define ABSL_LOG_INTERNAL_LOG_FIRST_N_IMPL(severity, n)            \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+// ABSL_LOG_EVERY_POW_2
+#define ABSL_LOG_INTERNAL_LOG_EVERY_POW_2_IMPL(severity)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+// ABSL_LOG_EVERY_N_SEC
+#define ABSL_LOG_INTERNAL_LOG_EVERY_N_SEC_IMPL(severity, n_seconds)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryNSec, n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_PLOG_EVERY_N_IMPL(severity, n)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()         \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_FIRST_N_IMPL(severity, n)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()         \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_EVERY_POW_2_IMPL(severity)          \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()         \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_EVERY_N_SEC_IMPL(severity, n_seconds)          \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, true)(EveryNSec, n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()                    \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_N_IMPL(severity, n) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true)       \
+  (EveryN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_FIRST_N_IMPL(severity, n) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true)       \
+  (FirstN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_POW_2_IMPL(severity) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true)        \
+  (EveryPow2) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_N_SEC_IMPL(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, true)                   \
+  (EveryNSec, n_seconds) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#else  // def NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_N_IMPL(severity, n) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false)      \
+  (EveryN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_FIRST_N_IMPL(severity, n) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false)      \
+  (FirstN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_POW_2_IMPL(severity) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false)       \
+  (EveryPow2) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_EVERY_N_SEC_IMPL(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_CONDITION_INFO(STATEFUL, false)                  \
+  (EveryNSec, n_seconds) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#endif  // def NDEBUG
+
+#define ABSL_LOG_INTERNAL_VLOG_EVERY_N_IMPL(verbose_level, n)                \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level))   \
+  case 0:                                                                    \
+  default:                                                                   \
+    ABSL_LOG_INTERNAL_CONDITION_INFO(                                        \
+        STATEFUL, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))      \
+  (EveryN, n) ABSL_LOGGING_INTERNAL_LOG_INFO.InternalStream().WithVerbosity( \
+      absl_logging_internal_verbose_level)
+
+#define ABSL_LOG_INTERNAL_VLOG_FIRST_N_IMPL(verbose_level, n)                \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level))   \
+  case 0:                                                                    \
+  default:                                                                   \
+    ABSL_LOG_INTERNAL_CONDITION_INFO(                                        \
+        STATEFUL, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))      \
+  (FirstN, n) ABSL_LOGGING_INTERNAL_LOG_INFO.InternalStream().WithVerbosity( \
+      absl_logging_internal_verbose_level)
+
+#define ABSL_LOG_INTERNAL_VLOG_EVERY_POW_2_IMPL(verbose_level)               \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level))   \
+  case 0:                                                                    \
+  default:                                                                   \
+    ABSL_LOG_INTERNAL_CONDITION_INFO(                                        \
+        STATEFUL, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))      \
+  (EveryPow2) ABSL_LOGGING_INTERNAL_LOG_INFO.InternalStream().WithVerbosity( \
+      absl_logging_internal_verbose_level)
+
+#define ABSL_LOG_INTERNAL_VLOG_EVERY_N_SEC_IMPL(verbose_level, n_seconds)  \
+  switch (const int absl_logging_internal_verbose_level = (verbose_level)) \
+  case 0:                                                                  \
+  default:                                                                 \
+    ABSL_LOG_INTERNAL_CONDITION_INFO(                                      \
+        STATEFUL, ABSL_VLOG_IS_ON(absl_logging_internal_verbose_level))    \
+  (EveryNSec, n_seconds) ABSL_LOGGING_INTERNAL_LOG_INFO.InternalStream()   \
+      .WithVerbosity(absl_logging_internal_verbose_level)
+
+#define ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_IMPL(severity, condition, n)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_LOG_IF_FIRST_N_IMPL(severity, condition, n)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_LOG_IF_EVERY_POW_2_IMPL(severity, condition)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_SEC_IMPL(severity, condition,  \
+                                                  n_seconds)            \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryNSec, \
+                                                             n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_IMPL(severity, condition, n)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()              \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_IF_FIRST_N_IMPL(severity, condition, n)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()              \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_IF_EVERY_POW_2_IMPL(severity, condition) \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()              \
+          .WithPerror()
+
+#define ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_SEC_IMPL(severity, condition, \
+                                                   n_seconds)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryNSec, \
+                                                             n_seconds) \
+      ABSL_LOGGING_INTERNAL_LOG##severity.InternalStream()              \
+          .WithPerror()
+
+#ifndef NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_IMPL(severity, condition, n)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryN, n) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_FIRST_N_IMPL(severity, condition, n)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(FirstN, n) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_POW_2_IMPL(severity, condition) \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryPow2) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_SEC_IMPL(severity, condition, \
+                                                   n_seconds)           \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, condition)(EveryNSec, \
+                                                             n_seconds) \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#else  // def NDEBUG
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_IMPL(severity, condition, n)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, false && (condition))( \
+      EveryN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_FIRST_N_IMPL(severity, condition, n)   \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, false && (condition))( \
+      FirstN, n) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_POW_2_IMPL(severity, condition)  \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, false && (condition))( \
+      EveryPow2) ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+
+#define ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_SEC_IMPL(severity, condition,  \
+                                                   n_seconds)            \
+  ABSL_LOG_INTERNAL_CONDITION##severity(STATEFUL, false && (condition))( \
+      EveryNSec, n_seconds)                                              \
+      ABSL_LOGGING_INTERNAL_DLOG##severity.InternalStream()
+#endif  // def NDEBUG
+
+#endif  // ABSL_LOG_INTERNAL_LOG_IMPL_H_

Pods/abseil/absl/log/internal/log_message.cc

@@ -0,0 +1,690 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_message.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef _WIN32
+#include <unistd.h>
+#endif
+
+#include <algorithm>
+#include <array>
+#include <atomic>
+#include <ios>
+#include <memory>
+#include <ostream>
+#include <string>
+#include <tuple>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/internal/strerror.h"
+#include "absl/base/internal/sysinfo.h"
+#include "absl/base/log_severity.h"
+#include "absl/container/inlined_vector.h"
+#include "absl/debugging/internal/examine_stack.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/append_truncated.h"
+#include "absl/log/internal/globals.h"
+#include "absl/log/internal/log_format.h"
+#include "absl/log/internal/log_sink_set.h"
+#include "absl/log/internal/proto.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/log/log_sink_registry.h"
+#include "absl/memory/memory.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+extern "C" ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(
+    AbslInternalOnFatalLogMessage)(const absl::LogEntry&) {
+  // Default - Do nothing
+}
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+// message `logging.proto.Event`
+enum EventTag : uint8_t {
+  kFileName = 2,
+  kFileLine = 3,
+  kTimeNsecs = 4,
+  kSeverity = 5,
+  kThreadId = 6,
+  kValue = 7,
+  kSequenceNumber = 9,
+  kThreadName = 10,
+};
+
+// message `logging.proto.Value`
+enum ValueTag : uint8_t {
+  kString = 1,
+  kStringLiteral = 6,
+};
+
+// Decodes a `logging.proto.Value` from `buf` and writes a string representation
+// into `dst`.  The string representation will be truncated if `dst` is not
+// large enough to hold it.  Returns false if `dst` has size zero or one (i.e.
+// sufficient only for a nul-terminator) and no decoded data could be written.
+// This function may or may not write a nul-terminator into `dst`, and it may or
+// may not truncate the data it writes in order to do make space for that nul
+// terminator.  In any case, `dst` will be advanced to point at the byte where
+// subsequent writes should begin.
+bool PrintValue(absl::Span<char>& dst, absl::Span<const char> buf) {
+  if (dst.size() <= 1) return false;
+  ProtoField field;
+  while (field.DecodeFrom(&buf)) {
+    switch (field.tag()) {
+      case ValueTag::kString:
+      case ValueTag::kStringLiteral:
+        if (field.type() == WireType::kLengthDelimited)
+          if (log_internal::AppendTruncated(field.string_value(), dst) <
+              field.string_value().size())
+            return false;
+    }
+  }
+  return true;
+}
+
+// See `logging.proto.Severity`
+int32_t ProtoSeverity(absl::LogSeverity severity, int verbose_level) {
+  switch (severity) {
+    case absl::LogSeverity::kInfo:
+      if (verbose_level == absl::LogEntry::kNoVerbosityLevel) return 800;
+      return 600 - verbose_level;
+    case absl::LogSeverity::kWarning:
+      return 900;
+    case absl::LogSeverity::kError:
+      return 950;
+    case absl::LogSeverity::kFatal:
+      return 1100;
+    default:
+      return 800;
+  }
+}
+
+absl::string_view Basename(absl::string_view filepath) {
+#ifdef _WIN32
+  size_t path = filepath.find_last_of("/\\");
+#else
+  size_t path = filepath.find_last_of('/');
+#endif
+  if (path != filepath.npos) filepath.remove_prefix(path + 1);
+  return filepath;
+}
+
+void WriteToString(const char* data, void* str) {
+  reinterpret_cast<std::string*>(str)->append(data);
+}
+void WriteToStream(const char* data, void* os) {
+  auto* cast_os = static_cast<std::ostream*>(os);
+  *cast_os << data;
+}
+}  // namespace
+
+struct LogMessage::LogMessageData final {
+  LogMessageData(const char* file, int line, absl::LogSeverity severity,
+                 absl::Time timestamp);
+  LogMessageData(const LogMessageData&) = delete;
+  LogMessageData& operator=(const LogMessageData&) = delete;
+
+  // `LogEntry` sent to `LogSink`s; contains metadata.
+  absl::LogEntry entry;
+
+  // true => this was first fatal msg
+  bool first_fatal;
+  // true => all failures should be quiet
+  bool fail_quietly;
+  // true => PLOG was requested
+  bool is_perror;
+
+  // Extra `LogSink`s to log to, in addition to `global_sinks`.
+  absl::InlinedVector<absl::LogSink*, 16> extra_sinks;
+  // If true, log to `extra_sinks` but not to `global_sinks` or hardcoded
+  // non-sink targets (e.g. stderr, log files).
+  bool extra_sinks_only;
+
+  std::ostream manipulated;  // ostream with IO manipulators applied
+
+  // A `logging.proto.Event` proto message is built into `encoded_buf`.
+  std::array<char, kLogMessageBufferSize> encoded_buf;
+  // `encoded_remaining()` is the suffix of `encoded_buf` that has not been
+  // filled yet.  If a datum to be encoded does not fit into
+  // `encoded_remaining()` and cannot be truncated to fit, the size of
+  // `encoded_remaining()` will be zeroed to prevent encoding of any further
+  // data.  Note that in this case its `data()` pointer will not point past the
+  // end of `encoded_buf`.
+  // The first use of `encoded_remaining()` is our chance to record metadata
+  // after any modifications (e.g. by `AtLocation()`) but before any data have
+  // been recorded.  We want to record metadata before data so that data are
+  // preferentially truncated if we run out of buffer.
+  absl::Span<char>& encoded_remaining() {
+    if (encoded_remaining_actual_do_not_use_directly.data() == nullptr) {
+      encoded_remaining_actual_do_not_use_directly =
+          absl::MakeSpan(encoded_buf);
+      InitializeEncodingAndFormat();
+    }
+    return encoded_remaining_actual_do_not_use_directly;
+  }
+  absl::Span<char> encoded_remaining_actual_do_not_use_directly;
+
+  // A formatted string message is built in `string_buf`.
+  std::array<char, kLogMessageBufferSize> string_buf;
+
+  void InitializeEncodingAndFormat();
+  void FinalizeEncodingAndFormat();
+};
+
+LogMessage::LogMessageData::LogMessageData(const char* file, int line,
+                                           absl::LogSeverity severity,
+                                           absl::Time timestamp)
+    : extra_sinks_only(false), manipulated(nullptr) {
+  // Legacy defaults for LOG's ostream:
+  manipulated.setf(std::ios_base::showbase | std::ios_base::boolalpha);
+  entry.full_filename_ = file;
+  entry.base_filename_ = Basename(file);
+  entry.line_ = line;
+  entry.prefix_ = absl::ShouldPrependLogPrefix();
+  entry.severity_ = absl::NormalizeLogSeverity(severity);
+  entry.verbose_level_ = absl::LogEntry::kNoVerbosityLevel;
+  entry.timestamp_ = timestamp;
+  entry.tid_ = absl::base_internal::GetCachedTID();
+}
+
+void LogMessage::LogMessageData::InitializeEncodingAndFormat() {
+  EncodeStringTruncate(EventTag::kFileName, entry.source_filename(),
+                       &encoded_remaining());
+  EncodeVarint(EventTag::kFileLine, entry.source_line(), &encoded_remaining());
+  EncodeVarint(EventTag::kTimeNsecs, absl::ToUnixNanos(entry.timestamp()),
+               &encoded_remaining());
+  EncodeVarint(EventTag::kSeverity,
+               ProtoSeverity(entry.log_severity(), entry.verbosity()),
+               &encoded_remaining());
+  EncodeVarint(EventTag::kThreadId, entry.tid(), &encoded_remaining());
+}
+
+void LogMessage::LogMessageData::FinalizeEncodingAndFormat() {
+  // Note that `encoded_remaining()` may have zero size without pointing past
+  // the end of `encoded_buf`, so the difference between `data()` pointers is
+  // used to compute the size of `encoded_data`.
+  absl::Span<const char> encoded_data(
+      encoded_buf.data(),
+      static_cast<size_t>(encoded_remaining().data() - encoded_buf.data()));
+  // `string_remaining` is the suffix of `string_buf` that has not been filled
+  // yet.
+  absl::Span<char> string_remaining(string_buf);
+  // We may need to write a newline and nul-terminator at the end of the decoded
+  // string data.  Rather than worry about whether those should overwrite the
+  // end of the string (if the buffer is full) or be appended, we avoid writing
+  // into the last two bytes so we always have space to append.
+  string_remaining.remove_suffix(2);
+  entry.prefix_len_ =
+      entry.prefix() ? log_internal::FormatLogPrefix(
+                           entry.log_severity(), entry.timestamp(), entry.tid(),
+                           entry.source_basename(), entry.source_line(),
+                           log_internal::ThreadIsLoggingToLogSink()
+                               ? PrefixFormat::kRaw
+                               : PrefixFormat::kNotRaw,
+                           string_remaining)
+                     : 0;
+  // Decode data from `encoded_buf` until we run out of data or we run out of
+  // `string_remaining`.
+  ProtoField field;
+  while (field.DecodeFrom(&encoded_data)) {
+    switch (field.tag()) {
+      case EventTag::kValue:
+        if (field.type() != WireType::kLengthDelimited) continue;
+        if (PrintValue(string_remaining, field.bytes_value())) continue;
+        break;
+    }
+  }
+  auto chars_written =
+      static_cast<size_t>(string_remaining.data() - string_buf.data());
+    string_buf[chars_written++] = '\n';
+  string_buf[chars_written++] = '\0';
+  entry.text_message_with_prefix_and_newline_and_nul_ =
+      absl::MakeSpan(string_buf).subspan(0, chars_written);
+}
+
+LogMessage::LogMessage(const char* file, int line, absl::LogSeverity severity)
+    : data_(absl::make_unique<LogMessageData>(file, line, severity,
+                                              absl::Now())) {
+  data_->first_fatal = false;
+  data_->is_perror = false;
+  data_->fail_quietly = false;
+
+  // This logs a backtrace even if the location is subsequently changed using
+  // AtLocation.  This quirk, and the behavior when AtLocation is called twice,
+  // are fixable but probably not worth fixing.
+  LogBacktraceIfNeeded();
+}
+
+LogMessage::LogMessage(const char* file, int line, InfoTag)
+    : LogMessage(file, line, absl::LogSeverity::kInfo) {}
+LogMessage::LogMessage(const char* file, int line, WarningTag)
+    : LogMessage(file, line, absl::LogSeverity::kWarning) {}
+LogMessage::LogMessage(const char* file, int line, ErrorTag)
+    : LogMessage(file, line, absl::LogSeverity::kError) {}
+
+LogMessage::~LogMessage() {
+#ifdef ABSL_MIN_LOG_LEVEL
+  if (data_->entry.log_severity() <
+          static_cast<absl::LogSeverity>(ABSL_MIN_LOG_LEVEL) &&
+      data_->entry.log_severity() < absl::LogSeverity::kFatal) {
+    return;
+  }
+#endif
+  Flush();
+}
+
+LogMessage& LogMessage::AtLocation(absl::string_view file, int line) {
+  data_->entry.full_filename_ = file;
+  data_->entry.base_filename_ = Basename(file);
+  data_->entry.line_ = line;
+  LogBacktraceIfNeeded();
+  return *this;
+}
+
+LogMessage& LogMessage::NoPrefix() {
+  data_->entry.prefix_ = false;
+  return *this;
+}
+
+LogMessage& LogMessage::WithVerbosity(int verbose_level) {
+  if (verbose_level == absl::LogEntry::kNoVerbosityLevel) {
+    data_->entry.verbose_level_ = absl::LogEntry::kNoVerbosityLevel;
+  } else {
+    data_->entry.verbose_level_ = std::max(0, verbose_level);
+  }
+  return *this;
+}
+
+LogMessage& LogMessage::WithTimestamp(absl::Time timestamp) {
+  data_->entry.timestamp_ = timestamp;
+  return *this;
+}
+
+LogMessage& LogMessage::WithThreadID(absl::LogEntry::tid_t tid) {
+  data_->entry.tid_ = tid;
+  return *this;
+}
+
+LogMessage& LogMessage::WithMetadataFrom(const absl::LogEntry& entry) {
+  data_->entry.full_filename_ = entry.full_filename_;
+  data_->entry.base_filename_ = entry.base_filename_;
+  data_->entry.line_ = entry.line_;
+  data_->entry.prefix_ = entry.prefix_;
+  data_->entry.severity_ = entry.severity_;
+  data_->entry.verbose_level_ = entry.verbose_level_;
+  data_->entry.timestamp_ = entry.timestamp_;
+  data_->entry.tid_ = entry.tid_;
+  return *this;
+}
+
+LogMessage& LogMessage::WithPerror() {
+  data_->is_perror = true;
+  return *this;
+}
+
+LogMessage& LogMessage::ToSinkAlso(absl::LogSink* sink) {
+  ABSL_INTERNAL_CHECK(sink, "null LogSink*");
+  data_->extra_sinks.push_back(sink);
+  return *this;
+}
+
+LogMessage& LogMessage::ToSinkOnly(absl::LogSink* sink) {
+  ABSL_INTERNAL_CHECK(sink, "null LogSink*");
+  data_->extra_sinks.clear();
+  data_->extra_sinks.push_back(sink);
+  data_->extra_sinks_only = true;
+  return *this;
+}
+
+#ifdef __ELF__
+extern "C" void __gcov_dump() ABSL_ATTRIBUTE_WEAK;
+extern "C" void __gcov_flush() ABSL_ATTRIBUTE_WEAK;
+#endif
+
+void LogMessage::FailWithoutStackTrace() {
+  // Now suppress repeated trace logging:
+  log_internal::SetSuppressSigabortTrace(true);
+#if defined _DEBUG && defined COMPILER_MSVC
+  // When debugging on windows, avoid the obnoxious dialog.
+  __debugbreak();
+#endif
+
+#ifdef __ELF__
+  // For b/8737634, flush coverage if we are in coverage mode.
+  if (&__gcov_dump != nullptr) {
+    __gcov_dump();
+  } else if (&__gcov_flush != nullptr) {
+    __gcov_flush();
+  }
+#endif
+
+  abort();
+}
+
+void LogMessage::FailQuietly() {
+  // _exit. Calling abort() would trigger all sorts of death signal handlers
+  // and a detailed stack trace. Calling exit() would trigger the onexit
+  // handlers, including the heap-leak checker, which is guaranteed to fail in
+  // this case: we probably just new'ed the std::string that we logged.
+  // Anyway, if you're calling Fail or FailQuietly, you're trying to bail out
+  // of the program quickly, and it doesn't make much sense for FailQuietly to
+  // offer different guarantees about exit behavior than Fail does. (And as a
+  // consequence for QCHECK and CHECK to offer different exit behaviors)
+  _exit(1);
+}
+
+LogMessage& LogMessage::operator<<(const std::string& v) {
+  CopyToEncodedBuffer<StringType::kNotLiteral>(v);
+  return *this;
+}
+
+LogMessage& LogMessage::operator<<(absl::string_view v) {
+  CopyToEncodedBuffer<StringType::kNotLiteral>(v);
+  return *this;
+}
+LogMessage& LogMessage::operator<<(std::ostream& (*m)(std::ostream& os)) {
+  OstreamView view(*data_);
+  data_->manipulated << m;
+  return *this;
+}
+LogMessage& LogMessage::operator<<(std::ios_base& (*m)(std::ios_base& os)) {
+  OstreamView view(*data_);
+  data_->manipulated << m;
+  return *this;
+}
+template LogMessage& LogMessage::operator<<(const char& v);
+template LogMessage& LogMessage::operator<<(const signed char& v);
+template LogMessage& LogMessage::operator<<(const unsigned char& v);
+template LogMessage& LogMessage::operator<<(const short& v);           // NOLINT
+template LogMessage& LogMessage::operator<<(const unsigned short& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(const int& v);
+template LogMessage& LogMessage::operator<<(const unsigned int& v);
+template LogMessage& LogMessage::operator<<(const long& v);           // NOLINT
+template LogMessage& LogMessage::operator<<(const unsigned long& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(const long long& v);      // NOLINT
+template LogMessage& LogMessage::operator<<(
+    const unsigned long long& v);  // NOLINT
+template LogMessage& LogMessage::operator<<(void* const& v);
+template LogMessage& LogMessage::operator<<(const void* const& v);
+template LogMessage& LogMessage::operator<<(const float& v);
+template LogMessage& LogMessage::operator<<(const double& v);
+template LogMessage& LogMessage::operator<<(const bool& v);
+
+void LogMessage::Flush() {
+  if (data_->entry.log_severity() < absl::MinLogLevel()) return;
+
+  if (data_->is_perror) {
+    InternalStream() << ": " << absl::base_internal::StrError(errno_saver_())
+                     << " [" << errno_saver_() << "]";
+  }
+
+  // Have we already seen a fatal message?
+  ABSL_CONST_INIT static std::atomic<bool> seen_fatal(false);
+  if (data_->entry.log_severity() == absl::LogSeverity::kFatal &&
+      absl::log_internal::ExitOnDFatal()) {
+    // Exactly one LOG(FATAL) message is responsible for aborting the process,
+    // even if multiple threads LOG(FATAL) concurrently.
+    bool expected_seen_fatal = false;
+    if (seen_fatal.compare_exchange_strong(expected_seen_fatal, true,
+                                           std::memory_order_relaxed)) {
+      data_->first_fatal = true;
+    }
+  }
+
+  data_->FinalizeEncodingAndFormat();
+  data_->entry.encoding_ =
+      absl::string_view(data_->encoded_buf.data(),
+                        static_cast<size_t>(data_->encoded_remaining().data() -
+                                            data_->encoded_buf.data()));
+  SendToLog();
+}
+
+void LogMessage::SetFailQuietly() { data_->fail_quietly = true; }
+
+LogMessage::OstreamView::OstreamView(LogMessageData& message_data)
+    : data_(message_data), encoded_remaining_copy_(data_.encoded_remaining()) {
+  // This constructor sets the `streambuf` up so that streaming into an attached
+  // ostream encodes string data in-place.  To do that, we write appropriate
+  // headers into the buffer using a copy of the buffer view so that we can
+  // decide not to keep them later if nothing is ever streamed in.  We don't
+  // know how much data we'll get, but we can use the size of the remaining
+  // buffer as an upper bound and fill in the right size once we know it.
+  message_start_ =
+      EncodeMessageStart(EventTag::kValue, encoded_remaining_copy_.size(),
+                         &encoded_remaining_copy_);
+  string_start_ =
+      EncodeMessageStart(ValueTag::kString, encoded_remaining_copy_.size(),
+                         &encoded_remaining_copy_);
+  setp(encoded_remaining_copy_.data(),
+       encoded_remaining_copy_.data() + encoded_remaining_copy_.size());
+  data_.manipulated.rdbuf(this);
+}
+
+LogMessage::OstreamView::~OstreamView() {
+  data_.manipulated.rdbuf(nullptr);
+  if (!string_start_.data()) {
+    // The second field header didn't fit.  Whether the first one did or not, we
+    // shouldn't commit `encoded_remaining_copy_`, and we also need to zero the
+    // size of `data_->encoded_remaining()` so that no more data are encoded.
+    data_.encoded_remaining().remove_suffix(data_.encoded_remaining().size());
+    return;
+  }
+  const absl::Span<const char> contents(pbase(),
+                                        static_cast<size_t>(pptr() - pbase()));
+  if (contents.empty()) return;
+  encoded_remaining_copy_.remove_prefix(contents.size());
+  EncodeMessageLength(string_start_, &encoded_remaining_copy_);
+  EncodeMessageLength(message_start_, &encoded_remaining_copy_);
+  data_.encoded_remaining() = encoded_remaining_copy_;
+}
+
+std::ostream& LogMessage::OstreamView::stream() { return data_.manipulated; }
+
+bool LogMessage::IsFatal() const {
+  return data_->entry.log_severity() == absl::LogSeverity::kFatal &&
+         absl::log_internal::ExitOnDFatal();
+}
+
+void LogMessage::PrepareToDie() {
+  // If we log a FATAL message, flush all the log destinations, then toss
+  // a signal for others to catch. We leave the logs in a state that
+  // someone else can use them (as long as they flush afterwards)
+  if (data_->first_fatal) {
+    // Notify observers about the upcoming fatal error.
+    ABSL_INTERNAL_C_SYMBOL(AbslInternalOnFatalLogMessage)(data_->entry);
+  }
+
+  if (!data_->fail_quietly) {
+    // Log the message first before we start collecting stack trace.
+    log_internal::LogToSinks(data_->entry, absl::MakeSpan(data_->extra_sinks),
+                             data_->extra_sinks_only);
+
+    // `DumpStackTrace` generates an empty string under MSVC.
+    // Adding the constant prefix here simplifies testing.
+    data_->entry.stacktrace_ = "*** Check failure stack trace: ***\n";
+    debugging_internal::DumpStackTrace(
+        0, log_internal::MaxFramesInLogStackTrace(),
+        log_internal::ShouldSymbolizeLogStackTrace(), WriteToString,
+        &data_->entry.stacktrace_);
+  }
+}
+
+void LogMessage::Die() {
+  absl::FlushLogSinks();
+
+  if (data_->fail_quietly) {
+    FailQuietly();
+  } else {
+    FailWithoutStackTrace();
+  }
+}
+
+void LogMessage::SendToLog() {
+  if (IsFatal()) PrepareToDie();
+  // Also log to all registered sinks, even if OnlyLogToStderr() is set.
+  log_internal::LogToSinks(data_->entry, absl::MakeSpan(data_->extra_sinks),
+                           data_->extra_sinks_only);
+  if (IsFatal()) Die();
+}
+
+void LogMessage::LogBacktraceIfNeeded() {
+  if (!absl::log_internal::IsInitialized()) return;
+
+  if (!absl::log_internal::ShouldLogBacktraceAt(data_->entry.source_basename(),
+                                                data_->entry.source_line()))
+    return;
+  OstreamView view(*data_);
+  view.stream() << " (stacktrace:\n";
+  debugging_internal::DumpStackTrace(
+      1, log_internal::MaxFramesInLogStackTrace(),
+      log_internal::ShouldSymbolizeLogStackTrace(), WriteToStream,
+      &view.stream());
+  view.stream() << ") ";
+}
+
+// Encodes into `data_->encoded_remaining()` a partial `logging.proto.Event`
+// containing the specified string data using a `Value` field appropriate to
+// `str_type`.  Truncates `str` if necessary, but emits nothing and marks the
+// buffer full if  even the field headers do not fit.
+template <LogMessage::StringType str_type>
+void LogMessage::CopyToEncodedBuffer(absl::string_view str) {
+  auto encoded_remaining_copy = data_->encoded_remaining();
+  auto start = EncodeMessageStart(
+      EventTag::kValue, BufferSizeFor(WireType::kLengthDelimited) + str.size(),
+      &encoded_remaining_copy);
+  // If the `logging.proto.Event.value` field header did not fit,
+  // `EncodeMessageStart` will have zeroed `encoded_remaining_copy`'s size and
+  // `EncodeStringTruncate` will fail too.
+  if (EncodeStringTruncate(str_type == StringType::kLiteral
+                               ? ValueTag::kStringLiteral
+                               : ValueTag::kString,
+                           str, &encoded_remaining_copy)) {
+    // The string may have been truncated, but the field header fit.
+    EncodeMessageLength(start, &encoded_remaining_copy);
+    data_->encoded_remaining() = encoded_remaining_copy;
+  } else {
+    // The field header(s) did not fit; zero `encoded_remaining()` so we don't
+    // write anything else later.
+    data_->encoded_remaining().remove_suffix(data_->encoded_remaining().size());
+  }
+}
+template void LogMessage::CopyToEncodedBuffer<LogMessage::StringType::kLiteral>(
+    absl::string_view str);
+template void LogMessage::CopyToEncodedBuffer<
+    LogMessage::StringType::kNotLiteral>(absl::string_view str);
+template <LogMessage::StringType str_type>
+void LogMessage::CopyToEncodedBuffer(char ch, size_t num) {
+  auto encoded_remaining_copy = data_->encoded_remaining();
+  auto value_start = EncodeMessageStart(
+      EventTag::kValue, BufferSizeFor(WireType::kLengthDelimited) + num,
+      &encoded_remaining_copy);
+  auto str_start = EncodeMessageStart(str_type == StringType::kLiteral
+                                          ? ValueTag::kStringLiteral
+                                          : ValueTag::kString,
+                                      num, &encoded_remaining_copy);
+  if (str_start.data()) {
+    // The field headers fit.
+    log_internal::AppendTruncated(ch, num, encoded_remaining_copy);
+    EncodeMessageLength(str_start, &encoded_remaining_copy);
+    EncodeMessageLength(value_start, &encoded_remaining_copy);
+    data_->encoded_remaining() = encoded_remaining_copy;
+  } else {
+    // The field header(s) did not fit; zero `encoded_remaining()` so we don't
+    // write anything else later.
+    data_->encoded_remaining().remove_suffix(data_->encoded_remaining().size());
+  }
+}
+template void LogMessage::CopyToEncodedBuffer<LogMessage::StringType::kLiteral>(
+    char ch, size_t num);
+template void LogMessage::CopyToEncodedBuffer<
+    LogMessage::StringType::kNotLiteral>(char ch, size_t num);
+
+// We intentionally don't return from these destructors. Disable MSVC's warning
+// about the destructor never returning as we do so intentionally here.
+#if defined(_MSC_VER) && !defined(__clang__)
+#pragma warning(push)
+#pragma warning(disable : 4722)
+#endif
+
+LogMessageFatal::LogMessageFatal(const char* file, int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {}
+
+LogMessageFatal::LogMessageFatal(const char* file, int line,
+                                 absl::string_view failure_msg)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  *this << "Check failed: " << failure_msg << " ";
+}
+
+LogMessageFatal::~LogMessageFatal() {
+  Flush();
+  FailWithoutStackTrace();
+}
+
+LogMessageDebugFatal::LogMessageDebugFatal(const char* file, int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {}
+
+LogMessageDebugFatal::~LogMessageDebugFatal() {
+  Flush();
+  FailWithoutStackTrace();
+}
+
+LogMessageQuietlyDebugFatal::LogMessageQuietlyDebugFatal(const char* file,
+                                                         int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  SetFailQuietly();
+}
+
+LogMessageQuietlyDebugFatal::~LogMessageQuietlyDebugFatal() {
+  Flush();
+  FailQuietly();
+}
+
+LogMessageQuietlyFatal::LogMessageQuietlyFatal(const char* file, int line)
+    : LogMessage(file, line, absl::LogSeverity::kFatal) {
+  SetFailQuietly();
+}
+
+LogMessageQuietlyFatal::LogMessageQuietlyFatal(const char* file, int line,
+                                               absl::string_view failure_msg)
+    : LogMessageQuietlyFatal(file, line) {
+    *this << "Check failed: " << failure_msg << " ";
+}
+
+LogMessageQuietlyFatal::~LogMessageQuietlyFatal() {
+  Flush();
+  FailQuietly();
+}
+#if defined(_MSC_VER) && !defined(__clang__)
+#pragma warning(pop)
+#endif
+
+}  // namespace log_internal
+
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/log_message.h

@@ -0,0 +1,394 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_message.h
+// -----------------------------------------------------------------------------
+//
+// This file declares `class absl::log_internal::LogMessage`. This class more or
+// less represents a particular log message. LOG/CHECK macros create a
+// temporary instance of `LogMessage` and then stream values to it.  At the end
+// of the LOG/CHECK statement, LogMessage instance goes out of scope and
+// `~LogMessage` directs the message to the registered log sinks.
+// Heap-allocation of `LogMessage` is unsupported.  Construction outside of a
+// `LOG` macro is unsupported.
+
+#ifndef ABSL_LOG_INTERNAL_LOG_MESSAGE_H_
+#define ABSL_LOG_INTERNAL_LOG_MESSAGE_H_
+
+#include <ios>
+#include <memory>
+#include <ostream>
+#include <streambuf>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/errno_saver.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/nullguard.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/strings/has_absl_stringify.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+constexpr int kLogMessageBufferSize = 15000;
+
+class LogMessage {
+ public:
+  struct InfoTag {};
+  struct WarningTag {};
+  struct ErrorTag {};
+
+  // Used for `LOG`.
+  LogMessage(const char* file, int line,
+             absl::LogSeverity severity) ABSL_ATTRIBUTE_COLD;
+  // These constructors are slightly smaller/faster to call; the severity is
+  // curried into the function pointer.
+  LogMessage(const char* file, int line,
+             InfoTag) ABSL_ATTRIBUTE_COLD ABSL_ATTRIBUTE_NOINLINE;
+  LogMessage(const char* file, int line,
+             WarningTag) ABSL_ATTRIBUTE_COLD ABSL_ATTRIBUTE_NOINLINE;
+  LogMessage(const char* file, int line,
+             ErrorTag) ABSL_ATTRIBUTE_COLD ABSL_ATTRIBUTE_NOINLINE;
+  LogMessage(const LogMessage&) = delete;
+  LogMessage& operator=(const LogMessage&) = delete;
+  ~LogMessage() ABSL_ATTRIBUTE_COLD;
+
+  // Overrides the location inferred from the callsite.  The string pointed to
+  // by `file` must be valid until the end of the statement.
+  LogMessage& AtLocation(absl::string_view file, int line);
+  // Omits the prefix from this line.  The prefix includes metadata about the
+  // logged data such as source code location and timestamp.
+  LogMessage& NoPrefix();
+  // Sets the verbosity field of the logged message as if it was logged by
+  // `VLOG(verbose_level)`.  Unlike `VLOG`, this method does not affect
+  // evaluation of the statement when the specified `verbose_level` has been
+  // disabled.  The only effect is on `absl::LogSink` implementations which
+  // make use of the `absl::LogSink::verbosity()` value.  The value
+  // `absl::LogEntry::kNoVerbosityLevel` can be specified to mark the message
+  // not verbose.
+  LogMessage& WithVerbosity(int verbose_level);
+  // Uses the specified timestamp instead of one collected in the constructor.
+  LogMessage& WithTimestamp(absl::Time timestamp);
+  // Uses the specified thread ID instead of one collected in the constructor.
+  LogMessage& WithThreadID(absl::LogEntry::tid_t tid);
+  // Copies all metadata (but no data) from the specified `absl::LogEntry`.
+  LogMessage& WithMetadataFrom(const absl::LogEntry& entry);
+  // Appends to the logged message a colon, a space, a textual description of
+  // the current value of `errno` (as by strerror(3)), and the numerical value
+  // of `errno`.
+  LogMessage& WithPerror();
+  // Sends this message to `*sink` in addition to whatever other sinks it would
+  // otherwise have been sent to.  `sink` must not be null.
+  LogMessage& ToSinkAlso(absl::LogSink* sink);
+  // Sends this message to `*sink` and no others.  `sink` must not be null.
+  LogMessage& ToSinkOnly(absl::LogSink* sink);
+
+  // Don't call this method from outside this library.
+  LogMessage& InternalStream() { return *this; }
+
+  // By-value overloads for small, common types let us overlook common failures
+  // to define globals and static data members (i.e. in a .cc file).
+  // clang-format off
+  // The CUDA toolchain cannot handle these <<<'s:
+  LogMessage& operator<<(char v) { return operator<< <char>(v); }
+  LogMessage& operator<<(signed char v) { return operator<< <signed char>(v); }
+  LogMessage& operator<<(unsigned char v) {
+    return operator<< <unsigned char>(v);
+  }
+  LogMessage& operator<<(signed short v) {  // NOLINT
+    return operator<< <signed short>(v);  // NOLINT
+  }
+  LogMessage& operator<<(signed int v) { return operator<< <signed int>(v); }
+  LogMessage& operator<<(signed long v) {  // NOLINT
+    return operator<< <signed long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(signed long long v) {  // NOLINT
+    return operator<< <signed long long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned short v) {  // NOLINT
+    return operator<< <unsigned short>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned int v) {
+    return operator<< <unsigned int>(v);
+  }
+  LogMessage& operator<<(unsigned long v) {  // NOLINT
+    return operator<< <unsigned long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(unsigned long long v) {  // NOLINT
+    return operator<< <unsigned long long>(v);  // NOLINT
+  }
+  LogMessage& operator<<(void* v) { return operator<< <void*>(v); }
+  LogMessage& operator<<(const void* v) { return operator<< <const void*>(v); }
+  LogMessage& operator<<(float v) { return operator<< <float>(v); }
+  LogMessage& operator<<(double v) { return operator<< <double>(v); }
+  LogMessage& operator<<(bool v) { return operator<< <bool>(v); }
+  // clang-format on
+
+  // These overloads are more efficient since no `ostream` is involved.
+  LogMessage& operator<<(const std::string& v);
+  LogMessage& operator<<(absl::string_view v);
+
+  // Handle stream manipulators e.g. std::endl.
+  LogMessage& operator<<(std::ostream& (*m)(std::ostream& os));
+  LogMessage& operator<<(std::ios_base& (*m)(std::ios_base& os));
+
+  // Literal strings.  This allows us to record C string literals as literals in
+  // the logging.proto.Value.
+  //
+  // Allow this overload to be inlined to prevent generating instantiations of
+  // this template for every value of `SIZE` encountered in each source code
+  // file. That significantly increases linker input sizes. Inlining is cheap
+  // because the argument to this overload is almost always a string literal so
+  // the call to `strlen` can be replaced at compile time. The overload for
+  // `char[]` below should not be inlined. The compiler typically does not have
+  // the string at compile time and cannot replace the call to `strlen` so
+  // inlining it increases the binary size. See the discussion on
+  // cl/107527369.
+  template <int SIZE>
+  LogMessage& operator<<(const char (&buf)[SIZE]);
+
+  // This prevents non-const `char[]` arrays from looking like literals.
+  template <int SIZE>
+  LogMessage& operator<<(char (&buf)[SIZE]) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Types that support `AbslStringify()` are serialized that way.
+  template <typename T,
+            typename std::enable_if<absl::HasAbslStringify<T>::value,
+                                    int>::type = 0>
+  LogMessage& operator<<(const T& v) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Types that don't support `AbslStringify()` but do support streaming into a
+  // `std::ostream&` are serialized that way.
+  template <typename T,
+            typename std::enable_if<!absl::HasAbslStringify<T>::value,
+                                    int>::type = 0>
+  LogMessage& operator<<(const T& v) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Note: We explicitly do not support `operator<<` for non-const references
+  // because it breaks logging of non-integer bitfield types (i.e., enums).
+
+ protected:
+  // Call `abort()` or similar to perform `LOG(FATAL)` crash.  It is assumed
+  // that the caller has already generated and written the trace as appropriate.
+  [[noreturn]] static void FailWithoutStackTrace();
+
+  // Similar to `FailWithoutStackTrace()`, but without `abort()`.  Terminates
+  // the process with an error exit code.
+  [[noreturn]] static void FailQuietly();
+
+  // Dispatches the completed `absl::LogEntry` to applicable `absl::LogSink`s.
+  // This might as well be inlined into `~LogMessage` except that
+  // `~LogMessageFatal` needs to call it early.
+  void Flush();
+
+  // After this is called, failures are done as quiet as possible for this log
+  // message.
+  void SetFailQuietly();
+
+ private:
+  struct LogMessageData;  // Opaque type containing message state
+  friend class AsLiteralImpl;
+  friend class StringifySink;
+
+  // This streambuf writes directly into the structured logging buffer so that
+  // arbitrary types can be encoded as string data (using
+  // `operator<<(std::ostream &, ...)` without any extra allocation or copying.
+  // Space is reserved before the data to store the length field, which is
+  // filled in by `~OstreamView`.
+  class OstreamView final : public std::streambuf {
+   public:
+    explicit OstreamView(LogMessageData& message_data);
+    ~OstreamView() override;
+    OstreamView(const OstreamView&) = delete;
+    OstreamView& operator=(const OstreamView&) = delete;
+    std::ostream& stream();
+
+   private:
+    LogMessageData& data_;
+    absl::Span<char> encoded_remaining_copy_;
+    absl::Span<char> message_start_;
+    absl::Span<char> string_start_;
+  };
+
+  enum class StringType {
+    kLiteral,
+    kNotLiteral,
+  };
+  template <StringType str_type>
+  void CopyToEncodedBuffer(absl::string_view str) ABSL_ATTRIBUTE_NOINLINE;
+  template <StringType str_type>
+  void CopyToEncodedBuffer(char ch, size_t num) ABSL_ATTRIBUTE_NOINLINE;
+
+  // Returns `true` if the message is fatal or enabled debug-fatal.
+  bool IsFatal() const;
+
+  // Records some tombstone-type data in anticipation of `Die`.
+  void PrepareToDie();
+  void Die();
+
+  void SendToLog();
+
+  // Checks `FLAGS_log_backtrace_at` and appends a backtrace if appropriate.
+  void LogBacktraceIfNeeded();
+
+  // This should be the first data member so that its initializer captures errno
+  // before any other initializers alter it (e.g. with calls to new) and so that
+  // no other destructors run afterward an alter it (e.g. with calls to delete).
+  absl::base_internal::ErrnoSaver errno_saver_;
+
+  // We keep the data in a separate struct so that each instance of `LogMessage`
+  // uses less stack space.
+  std::unique_ptr<LogMessageData> data_;
+};
+
+// Helper class so that `AbslStringify()` can modify the LogMessage.
+class StringifySink final {
+ public:
+  explicit StringifySink(LogMessage& message) : message_(message) {}
+
+  void Append(size_t count, char ch) {
+    message_.CopyToEncodedBuffer<LogMessage::StringType::kNotLiteral>(ch,
+                                                                      count);
+  }
+
+  void Append(absl::string_view v) {
+    message_.CopyToEncodedBuffer<LogMessage::StringType::kNotLiteral>(v);
+  }
+
+  // For types that implement `AbslStringify` using `absl::Format()`.
+  friend void AbslFormatFlush(StringifySink* sink, absl::string_view v) {
+    sink->Append(v);
+  }
+
+ private:
+  LogMessage& message_;
+};
+
+// Note: the following is declared `ABSL_ATTRIBUTE_NOINLINE`
+template <typename T,
+          typename std::enable_if<absl::HasAbslStringify<T>::value, int>::type>
+LogMessage& LogMessage::operator<<(const T& v) {
+  StringifySink sink(*this);
+  // Replace with public API.
+  AbslStringify(sink, v);
+  return *this;
+}
+
+// Note: the following is declared `ABSL_ATTRIBUTE_NOINLINE`
+template <typename T,
+          typename std::enable_if<!absl::HasAbslStringify<T>::value, int>::type>
+LogMessage& LogMessage::operator<<(const T& v) {
+  OstreamView view(*data_);
+  view.stream() << log_internal::NullGuard<T>().Guard(v);
+  return *this;
+}
+
+template <int SIZE>
+LogMessage& LogMessage::operator<<(const char (&buf)[SIZE]) {
+  CopyToEncodedBuffer<StringType::kLiteral>(buf);
+  return *this;
+}
+
+// Note: the following is declared `ABSL_ATTRIBUTE_NOINLINE`
+template <int SIZE>
+LogMessage& LogMessage::operator<<(char (&buf)[SIZE]) {
+  CopyToEncodedBuffer<StringType::kNotLiteral>(buf);
+  return *this;
+}
+// We instantiate these specializations in the library's TU to save space in
+// other TUs.  Since the template is marked `ABSL_ATTRIBUTE_NOINLINE` we will be
+// emitting a function call either way.
+extern template LogMessage& LogMessage::operator<<(const char& v);
+extern template LogMessage& LogMessage::operator<<(const signed char& v);
+extern template LogMessage& LogMessage::operator<<(const unsigned char& v);
+extern template LogMessage& LogMessage::operator<<(const short& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned short& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(const int& v);
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned int& v);                                         // NOLINT
+extern template LogMessage& LogMessage::operator<<(const long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const long long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(
+    const unsigned long long& v);  // NOLINT
+extern template LogMessage& LogMessage::operator<<(void* const& v);
+extern template LogMessage& LogMessage::operator<<(const void* const& v);
+extern template LogMessage& LogMessage::operator<<(const float& v);
+extern template LogMessage& LogMessage::operator<<(const double& v);
+extern template LogMessage& LogMessage::operator<<(const bool& v);
+
+extern template void LogMessage::CopyToEncodedBuffer<
+    LogMessage::StringType::kLiteral>(absl::string_view str);
+extern template void LogMessage::CopyToEncodedBuffer<
+    LogMessage::StringType::kNotLiteral>(absl::string_view str);
+extern template void
+LogMessage::CopyToEncodedBuffer<LogMessage::StringType::kLiteral>(char ch,
+                                                                  size_t num);
+extern template void LogMessage::CopyToEncodedBuffer<
+    LogMessage::StringType::kNotLiteral>(char ch, size_t num);
+
+// `LogMessageFatal` ensures the process will exit in failure after logging this
+// message.
+class LogMessageFatal final : public LogMessage {
+ public:
+  LogMessageFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  LogMessageFatal(const char* file, int line,
+                  absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
+  [[noreturn]] ~LogMessageFatal();
+};
+
+// `LogMessageDebugFatal` ensures the process will exit in failure after logging
+// this message. It matches LogMessageFatal but is not [[noreturn]] as it's used
+// for DLOG(FATAL) variants.
+class LogMessageDebugFatal final : public LogMessage {
+ public:
+  LogMessageDebugFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  ~LogMessageDebugFatal();
+};
+
+class LogMessageQuietlyDebugFatal final : public LogMessage {
+ public:
+  // DLOG(QFATAL) calls this instead of LogMessageQuietlyFatal to make sure the
+  // destructor is not [[noreturn]] even if this is always FATAL as this is only
+  // invoked when DLOG() is enabled.
+  LogMessageQuietlyDebugFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  ~LogMessageQuietlyDebugFatal();
+};
+
+// Used for LOG(QFATAL) to make sure it's properly understood as [[noreturn]].
+class LogMessageQuietlyFatal final : public LogMessage {
+ public:
+  LogMessageQuietlyFatal(const char* file, int line) ABSL_ATTRIBUTE_COLD;
+  LogMessageQuietlyFatal(const char* file, int line,
+                         absl::string_view failure_msg) ABSL_ATTRIBUTE_COLD;
+  [[noreturn]] ~LogMessageQuietlyFatal();
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+extern "C" ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(
+    AbslInternalOnFatalLogMessage)(const absl::LogEntry&);
+
+#endif  // ABSL_LOG_INTERNAL_LOG_MESSAGE_H_

Pods/abseil/absl/log/internal/log_sink_set.cc

@@ -0,0 +1,296 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/log_sink_set.h"
+
+#ifndef ABSL_HAVE_THREAD_LOCAL
+#include <pthread.h>
+#endif
+
+#ifdef __ANDROID__
+#include <android/log.h>
+#endif
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
+#include <algorithm>
+#include <vector>
+
+#include "absl/base/attributes.h"
+#include "absl/base/call_once.h"
+#include "absl/base/config.h"
+#include "absl/base/internal/raw_logging.h"
+#include "absl/base/log_severity.h"
+#include "absl/base/no_destructor.h"
+#include "absl/base/thread_annotations.h"
+#include "absl/cleanup/cleanup.h"
+#include "absl/log/globals.h"
+#include "absl/log/internal/config.h"
+#include "absl/log/internal/globals.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/strings/string_view.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+
+// Returns a mutable reference to a thread-local variable that should be true if
+// a globally-registered `LogSink`'s `Send()` is currently being invoked on this
+// thread.
+bool& ThreadIsLoggingStatus() {
+#ifdef ABSL_HAVE_THREAD_LOCAL
+  ABSL_CONST_INIT thread_local bool thread_is_logging = false;
+  return thread_is_logging;
+#else
+  ABSL_CONST_INIT static pthread_key_t thread_is_logging_key;
+  static const bool unused = [] {
+    if (pthread_key_create(&thread_is_logging_key, [](void* data) {
+          delete reinterpret_cast<bool*>(data);
+        })) {
+      perror("pthread_key_create failed!");
+      abort();
+    }
+    return true;
+  }();
+  (void)unused;  // Fixes -wunused-variable warning
+  bool* thread_is_logging_ptr =
+      reinterpret_cast<bool*>(pthread_getspecific(thread_is_logging_key));
+
+  if (ABSL_PREDICT_FALSE(!thread_is_logging_ptr)) {
+    thread_is_logging_ptr = new bool{false};
+    if (pthread_setspecific(thread_is_logging_key, thread_is_logging_ptr)) {
+      perror("pthread_setspecific failed");
+      abort();
+    }
+  }
+  return *thread_is_logging_ptr;
+#endif
+}
+
+class StderrLogSink final : public LogSink {
+ public:
+  ~StderrLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    if (entry.log_severity() < absl::StderrThreshold() &&
+        absl::log_internal::IsInitialized()) {
+      return;
+    }
+
+    ABSL_CONST_INIT static absl::once_flag warn_if_not_initialized;
+    absl::call_once(warn_if_not_initialized, []() {
+      if (absl::log_internal::IsInitialized()) return;
+      const char w[] =
+          "WARNING: All log messages before absl::InitializeLog() is called"
+          " are written to STDERR\n";
+      absl::log_internal::WriteToStderr(w, absl::LogSeverity::kWarning);
+    });
+
+    if (!entry.stacktrace().empty()) {
+      absl::log_internal::WriteToStderr(entry.stacktrace(),
+                                        entry.log_severity());
+    } else {
+      // TODO(b/226937039): do this outside else condition once we avoid
+      // ReprintFatalMessage
+      absl::log_internal::WriteToStderr(
+          entry.text_message_with_prefix_and_newline(), entry.log_severity());
+    }
+  }
+};
+
+#if defined(__ANDROID__)
+class AndroidLogSink final : public LogSink {
+ public:
+  ~AndroidLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    const int level = AndroidLogLevel(entry);
+    const char* const tag = GetAndroidNativeTag();
+    __android_log_write(level, tag,
+                        entry.text_message_with_prefix_and_newline_c_str());
+    if (entry.log_severity() == absl::LogSeverity::kFatal)
+      __android_log_write(ANDROID_LOG_FATAL, tag, "terminating.\n");
+  }
+
+ private:
+  static int AndroidLogLevel(const absl::LogEntry& entry) {
+    switch (entry.log_severity()) {
+      case absl::LogSeverity::kFatal:
+        return ANDROID_LOG_FATAL;
+      case absl::LogSeverity::kError:
+        return ANDROID_LOG_ERROR;
+      case absl::LogSeverity::kWarning:
+        return ANDROID_LOG_WARN;
+      default:
+        if (entry.verbosity() >= 2) return ANDROID_LOG_VERBOSE;
+        if (entry.verbosity() == 1) return ANDROID_LOG_DEBUG;
+        return ANDROID_LOG_INFO;
+    }
+  }
+};
+#endif  // !defined(__ANDROID__)
+
+#if defined(_WIN32)
+class WindowsDebuggerLogSink final : public LogSink {
+ public:
+  ~WindowsDebuggerLogSink() override = default;
+
+  void Send(const absl::LogEntry& entry) override {
+    if (entry.log_severity() < absl::StderrThreshold() &&
+        absl::log_internal::IsInitialized()) {
+      return;
+    }
+    ::OutputDebugStringA(entry.text_message_with_prefix_and_newline_c_str());
+  }
+};
+#endif  // !defined(_WIN32)
+
+class GlobalLogSinkSet final {
+ public:
+  GlobalLogSinkSet() {
+#if defined(__myriad2__) || defined(__Fuchsia__)
+    // myriad2 and Fuchsia do not log to stderr by default.
+#else
+    static absl::NoDestructor<StderrLogSink> stderr_log_sink;
+    AddLogSink(stderr_log_sink.get());
+#endif
+#ifdef __ANDROID__
+    static absl::NoDestructor<AndroidLogSink> android_log_sink;
+    AddLogSink(android_log_sink.get());
+#endif
+#if defined(_WIN32)
+    static absl::NoDestructor<WindowsDebuggerLogSink> debugger_log_sink;
+    AddLogSink(debugger_log_sink.get());
+#endif  // !defined(_WIN32)
+  }
+
+  void LogToSinks(const absl::LogEntry& entry,
+                  absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only)
+      ABSL_LOCKS_EXCLUDED(guard_) {
+    SendToSinks(entry, extra_sinks);
+
+    if (!extra_sinks_only) {
+      if (ThreadIsLoggingToLogSink()) {
+        absl::log_internal::WriteToStderr(
+            entry.text_message_with_prefix_and_newline(), entry.log_severity());
+      } else {
+        absl::ReaderMutexLock global_sinks_lock(&guard_);
+        ThreadIsLoggingStatus() = true;
+        // Ensure the "thread is logging" status is reverted upon leaving the
+        // scope even in case of exceptions.
+        auto status_cleanup =
+            absl::MakeCleanup([] { ThreadIsLoggingStatus() = false; });
+        SendToSinks(entry, absl::MakeSpan(sinks_));
+      }
+    }
+  }
+
+  void AddLogSink(absl::LogSink* sink) ABSL_LOCKS_EXCLUDED(guard_) {
+    {
+      absl::WriterMutexLock global_sinks_lock(&guard_);
+      auto pos = std::find(sinks_.begin(), sinks_.end(), sink);
+      if (pos == sinks_.end()) {
+        sinks_.push_back(sink);
+        return;
+      }
+    }
+    ABSL_INTERNAL_LOG(FATAL, "Duplicate log sinks are not supported");
+  }
+
+  void RemoveLogSink(absl::LogSink* sink) ABSL_LOCKS_EXCLUDED(guard_) {
+    {
+      absl::WriterMutexLock global_sinks_lock(&guard_);
+      auto pos = std::find(sinks_.begin(), sinks_.end(), sink);
+      if (pos != sinks_.end()) {
+        sinks_.erase(pos);
+        return;
+      }
+    }
+    ABSL_INTERNAL_LOG(FATAL, "Mismatched log sink being removed");
+  }
+
+  void FlushLogSinks() ABSL_LOCKS_EXCLUDED(guard_) {
+    if (ThreadIsLoggingToLogSink()) {
+      // The thread_local condition demonstrates that we're already holding the
+      // lock in order to iterate over `sinks_` for dispatch.  The thread-safety
+      // annotations don't know this, so we use `ABSL_NO_THREAD_SAFETY_ANALYSIS`
+      guard_.AssertReaderHeld();
+      FlushLogSinksLocked();
+    } else {
+      absl::ReaderMutexLock global_sinks_lock(&guard_);
+      // In case if LogSink::Flush overload decides to log
+      ThreadIsLoggingStatus() = true;
+      // Ensure the "thread is logging" status is reverted upon leaving the
+      // scope even in case of exceptions.
+      auto status_cleanup =
+          absl::MakeCleanup([] { ThreadIsLoggingStatus() = false; });
+      FlushLogSinksLocked();
+    }
+  }
+
+ private:
+  void FlushLogSinksLocked() ABSL_SHARED_LOCKS_REQUIRED(guard_) {
+    for (absl::LogSink* sink : sinks_) {
+      sink->Flush();
+    }
+  }
+
+  // Helper routine for LogToSinks.
+  static void SendToSinks(const absl::LogEntry& entry,
+                          absl::Span<absl::LogSink*> sinks) {
+    for (absl::LogSink* sink : sinks) {
+      sink->Send(entry);
+    }
+  }
+
+  using LogSinksSet = std::vector<absl::LogSink*>;
+  absl::Mutex guard_;
+  LogSinksSet sinks_ ABSL_GUARDED_BY(guard_);
+};
+
+// Returns reference to the global LogSinks set.
+GlobalLogSinkSet& GlobalSinks() {
+  static absl::NoDestructor<GlobalLogSinkSet> global_sinks;
+  return *global_sinks;
+}
+
+}  // namespace
+
+bool ThreadIsLoggingToLogSink() { return ThreadIsLoggingStatus(); }
+
+void LogToSinks(const absl::LogEntry& entry,
+                absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only) {
+  log_internal::GlobalSinks().LogToSinks(entry, extra_sinks, extra_sinks_only);
+}
+
+void AddLogSink(absl::LogSink* sink) {
+  log_internal::GlobalSinks().AddLogSink(sink);
+}
+
+void RemoveLogSink(absl::LogSink* sink) {
+  log_internal::GlobalSinks().RemoveLogSink(sink);
+}
+
+void FlushLogSinks() { log_internal::GlobalSinks().FlushLogSinks(); }
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/log_sink_set.h

@@ -0,0 +1,54 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/log_sink_set.h
+// -----------------------------------------------------------------------------
+
+#ifndef ABSL_LOG_INTERNAL_LOG_SINK_SET_H_
+#define ABSL_LOG_INTERNAL_LOG_SINK_SET_H_
+
+#include "absl/base/config.h"
+#include "absl/log/log_entry.h"
+#include "absl/log/log_sink.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// Returns true if a globally-registered `LogSink`'s `Send()` is currently
+// being invoked on this thread.
+bool ThreadIsLoggingToLogSink();
+
+// This function may log to two sets of sinks:
+//
+// * If `extra_sinks_only` is true, it will dispatch only to `extra_sinks`.
+//   `LogMessage::ToSinkAlso` and `LogMessage::ToSinkOnly` are used to attach
+//    extra sinks to the entry.
+// * Otherwise it will also log to the global sinks set. This set is managed
+//   by `absl::AddLogSink` and `absl::RemoveLogSink`.
+void LogToSinks(const absl::LogEntry& entry,
+                absl::Span<absl::LogSink*> extra_sinks, bool extra_sinks_only);
+
+// Implementation for operations with log sink set.
+void AddLogSink(absl::LogSink* sink);
+void RemoveLogSink(absl::LogSink* sink);
+void FlushLogSinks();
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_LOG_SINK_SET_H_

Pods/abseil/absl/log/internal/nullguard.cc

@@ -0,0 +1,35 @@
+// Copyright 2023 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/nullguard.h"
+
+#include <array>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+ABSL_CONST_INIT ABSL_DLL const std::array<char, 7> kCharNull{
+    {'(', 'n', 'u', 'l', 'l', ')', '\0'}};
+ABSL_CONST_INIT ABSL_DLL const std::array<signed char, 7> kSignedCharNull{
+    {'(', 'n', 'u', 'l', 'l', ')', '\0'}};
+ABSL_CONST_INIT ABSL_DLL const std::array<unsigned char, 7> kUnsignedCharNull{
+    {'(', 'n', 'u', 'l', 'l', ')', '\0'}};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/nullguard.h

@@ -0,0 +1,88 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/nullguard.h
+// -----------------------------------------------------------------------------
+//
+// NullGuard exists such that NullGuard<T>::Guard(v) returns v, unless passed a
+// nullptr_t, or a null char* or const char*, in which case it returns "(null)".
+// This allows streaming NullGuard<T>::Guard(v) to an output stream without
+// hitting undefined behavior for null values.
+
+#ifndef ABSL_LOG_INTERNAL_NULLGUARD_H_
+#define ABSL_LOG_INTERNAL_NULLGUARD_H_
+
+#include <array>
+#include <cstddef>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+ABSL_CONST_INIT ABSL_DLL extern const std::array<char, 7> kCharNull;
+ABSL_CONST_INIT ABSL_DLL extern const std::array<signed char, 7>
+    kSignedCharNull;
+ABSL_CONST_INIT ABSL_DLL extern const std::array<unsigned char, 7>
+    kUnsignedCharNull;
+
+template <typename T>
+struct NullGuard final {
+  static const T& Guard(const T& v) { return v; }
+};
+template <>
+struct NullGuard<char*> final {
+  static const char* Guard(const char* v) { return v ? v : kCharNull.data(); }
+};
+template <>
+struct NullGuard<const char*> final {
+  static const char* Guard(const char* v) { return v ? v : kCharNull.data(); }
+};
+template <>
+struct NullGuard<signed char*> final {
+  static const signed char* Guard(const signed char* v) {
+    return v ? v : kSignedCharNull.data();
+  }
+};
+template <>
+struct NullGuard<const signed char*> final {
+  static const signed char* Guard(const signed char* v) {
+    return v ? v : kSignedCharNull.data();
+  }
+};
+template <>
+struct NullGuard<unsigned char*> final {
+  static const unsigned char* Guard(const unsigned char* v) {
+    return v ? v : kUnsignedCharNull.data();
+  }
+};
+template <>
+struct NullGuard<const unsigned char*> final {
+  static const unsigned char* Guard(const unsigned char* v) {
+    return v ? v : kUnsignedCharNull.data();
+  }
+};
+template <>
+struct NullGuard<std::nullptr_t> final {
+  static const char* Guard(const std::nullptr_t&) { return kCharNull.data(); }
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_NULLGUARD_H_

Pods/abseil/absl/log/internal/nullstream.h

@@ -0,0 +1,127 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/nullstream.h
+// -----------------------------------------------------------------------------
+//
+// Classes `NullStream`, `NullStreamMaybeFatal ` and `NullStreamFatal`
+// implement a subset of the `LogMessage` API and are used instead when logging
+// of messages has been disabled.
+
+#ifndef ABSL_LOG_INTERNAL_NULLSTREAM_H_
+#define ABSL_LOG_INTERNAL_NULLSTREAM_H_
+
+#ifdef _WIN32
+#include <cstdlib>
+#else
+#include <unistd.h>
+#endif
+#include <ios>
+#include <ostream>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// A `NullStream` implements the API of `LogMessage` (a few methods and
+// `operator<<`) but does nothing.  All methods are defined inline so the
+// compiler can eliminate the whole instance and discard anything that's
+// streamed in.
+class NullStream {
+ public:
+  NullStream& AtLocation(absl::string_view, int) { return *this; }
+  template <typename SourceLocationType>
+  NullStream& AtLocation(SourceLocationType) {
+    return *this;
+  }
+  NullStream& NoPrefix() { return *this; }
+  NullStream& WithVerbosity(int) { return *this; }
+  template <typename TimeType>
+  NullStream& WithTimestamp(TimeType) {
+    return *this;
+  }
+  template <typename Tid>
+  NullStream& WithThreadID(Tid) {
+    return *this;
+  }
+  template <typename LogEntryType>
+  NullStream& WithMetadataFrom(const LogEntryType&) {
+    return *this;
+  }
+  NullStream& WithPerror() { return *this; }
+  template <typename LogSinkType>
+  NullStream& ToSinkAlso(LogSinkType*) {
+    return *this;
+  }
+  template <typename LogSinkType>
+  NullStream& ToSinkOnly(LogSinkType*) {
+    return *this;
+  }
+  template <typename LogSinkType>
+  NullStream& OutputToSink(LogSinkType*, bool) {
+    return *this;
+  }
+  NullStream& InternalStream() { return *this; }
+};
+template <typename T>
+inline NullStream& operator<<(NullStream& str, const T&) {
+  return str;
+}
+inline NullStream& operator<<(NullStream& str,
+                              std::ostream& (*)(std::ostream& os)) {
+  return str;
+}
+inline NullStream& operator<<(NullStream& str,
+                              std::ios_base& (*)(std::ios_base& os)) {
+  return str;
+}
+
+// `NullStreamMaybeFatal` implements the process termination semantics of
+// `LogMessage`, which is used for `DFATAL` severity and expression-defined
+// severity e.g. `LOG(LEVEL(HowBadIsIt()))`.  Like `LogMessage`, it terminates
+// the process when destroyed if the passed-in severity equals `FATAL`.
+class NullStreamMaybeFatal final : public NullStream {
+ public:
+  explicit NullStreamMaybeFatal(absl::LogSeverity severity)
+      : fatal_(severity == absl::LogSeverity::kFatal) {}
+  ~NullStreamMaybeFatal() {
+    if (fatal_) {
+      _exit(1);
+    }
+  }
+
+ private:
+  bool fatal_;
+};
+
+// `NullStreamFatal` implements the process termination semantics of
+// `LogMessageFatal`, which means it always terminates the process.  `DFATAL`
+// and expression-defined severity use `NullStreamMaybeFatal` above.
+class NullStreamFatal final : public NullStream {
+ public:
+  NullStreamFatal() = default;
+  [[noreturn]] ~NullStreamFatal() { _exit(1); }
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_GLOBALS_H_

Pods/abseil/absl/log/internal/proto.cc

@@ -0,0 +1,220 @@
+// Copyright 2020 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/proto.h"
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <cstdint>
+#include <cstring>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+namespace {
+void EncodeRawVarint(uint64_t value, size_t size, absl::Span<char> *buf) {
+  for (size_t s = 0; s < size; s++) {
+    (*buf)[s] = static_cast<char>((value & 0x7f) | (s + 1 == size ? 0 : 0x80));
+    value >>= 7;
+  }
+  buf->remove_prefix(size);
+}
+constexpr uint64_t MakeTagType(uint64_t tag, WireType type) {
+  return tag << 3 | static_cast<uint64_t>(type);
+}
+}  // namespace
+
+bool EncodeVarint(uint64_t tag, uint64_t value, absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::kVarint);
+  const size_t tag_type_size = VarintSize(tag_type);
+  const size_t value_size = VarintSize(value);
+  if (tag_type_size + value_size > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return false;
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  EncodeRawVarint(value, value_size, buf);
+  return true;
+}
+
+bool Encode64Bit(uint64_t tag, uint64_t value, absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::k64Bit);
+  const size_t tag_type_size = VarintSize(tag_type);
+  if (tag_type_size + sizeof(value) > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return false;
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  for (size_t s = 0; s < sizeof(value); s++) {
+    (*buf)[s] = static_cast<char>(value & 0xff);
+    value >>= 8;
+  }
+  buf->remove_prefix(sizeof(value));
+  return true;
+}
+
+bool Encode32Bit(uint64_t tag, uint32_t value, absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::k32Bit);
+  const size_t tag_type_size = VarintSize(tag_type);
+  if (tag_type_size + sizeof(value) > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return false;
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  for (size_t s = 0; s < sizeof(value); s++) {
+    (*buf)[s] = static_cast<char>(value & 0xff);
+    value >>= 8;
+  }
+  buf->remove_prefix(sizeof(value));
+  return true;
+}
+
+bool EncodeBytes(uint64_t tag, absl::Span<const char> value,
+                 absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::kLengthDelimited);
+  const size_t tag_type_size = VarintSize(tag_type);
+  uint64_t length = value.size();
+  const size_t length_size = VarintSize(length);
+  if (tag_type_size + length_size + value.size() > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return false;
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  EncodeRawVarint(length, length_size, buf);
+  memcpy(buf->data(), value.data(), value.size());
+  buf->remove_prefix(value.size());
+  return true;
+}
+
+bool EncodeBytesTruncate(uint64_t tag, absl::Span<const char> value,
+                         absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::kLengthDelimited);
+  const size_t tag_type_size = VarintSize(tag_type);
+  uint64_t length = value.size();
+  const size_t length_size =
+      VarintSize(std::min<uint64_t>(length, buf->size()));
+  if (tag_type_size + length_size <= buf->size() &&
+      tag_type_size + length_size + value.size() > buf->size()) {
+    value.remove_suffix(tag_type_size + length_size + value.size() -
+                        buf->size());
+    length = value.size();
+  }
+  if (tag_type_size + length_size + value.size() > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return false;
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  EncodeRawVarint(length, length_size, buf);
+  memcpy(buf->data(), value.data(), value.size());
+  buf->remove_prefix(value.size());
+  return true;
+}
+
+ABSL_MUST_USE_RESULT absl::Span<char> EncodeMessageStart(
+    uint64_t tag, uint64_t max_size, absl::Span<char> *buf) {
+  const uint64_t tag_type = MakeTagType(tag, WireType::kLengthDelimited);
+  const size_t tag_type_size = VarintSize(tag_type);
+  max_size = std::min<uint64_t>(max_size, buf->size());
+  const size_t length_size = VarintSize(max_size);
+  if (tag_type_size + length_size > buf->size()) {
+    buf->remove_suffix(buf->size());
+    return absl::Span<char>();
+  }
+  EncodeRawVarint(tag_type, tag_type_size, buf);
+  const absl::Span<char> ret = buf->subspan(0, length_size);
+  EncodeRawVarint(0, length_size, buf);
+  return ret;
+}
+
+void EncodeMessageLength(absl::Span<char> msg, const absl::Span<char> *buf) {
+  if (!msg.data()) return;
+  assert(buf->data() >= msg.data());
+  if (buf->data() < msg.data()) return;
+  EncodeRawVarint(
+      static_cast<uint64_t>(buf->data() - (msg.data() + msg.size())),
+      msg.size(), &msg);
+}
+
+namespace {
+uint64_t DecodeVarint(absl::Span<const char> *buf) {
+  uint64_t value = 0;
+  size_t s = 0;
+  while (s < buf->size()) {
+    value |= static_cast<uint64_t>(static_cast<unsigned char>((*buf)[s]) & 0x7f)
+             << 7 * s;
+    if (!((*buf)[s++] & 0x80)) break;
+  }
+  buf->remove_prefix(s);
+  return value;
+}
+
+uint64_t Decode64Bit(absl::Span<const char> *buf) {
+  uint64_t value = 0;
+  size_t s = 0;
+  while (s < buf->size()) {
+    value |= static_cast<uint64_t>(static_cast<unsigned char>((*buf)[s]))
+             << 8 * s;
+    if (++s == sizeof(value)) break;
+  }
+  buf->remove_prefix(s);
+  return value;
+}
+
+uint32_t Decode32Bit(absl::Span<const char> *buf) {
+  uint32_t value = 0;
+  size_t s = 0;
+  while (s < buf->size()) {
+    value |= static_cast<uint32_t>(static_cast<unsigned char>((*buf)[s]))
+             << 8 * s;
+    if (++s == sizeof(value)) break;
+  }
+  buf->remove_prefix(s);
+  return value;
+}
+}  // namespace
+
+bool ProtoField::DecodeFrom(absl::Span<const char> *data) {
+  if (data->empty()) return false;
+  const uint64_t tag_type = DecodeVarint(data);
+  tag_ = tag_type >> 3;
+  type_ = static_cast<WireType>(tag_type & 0x07);
+  switch (type_) {
+    case WireType::kVarint:
+      value_ = DecodeVarint(data);
+      break;
+    case WireType::k64Bit:
+      value_ = Decode64Bit(data);
+      break;
+    case WireType::kLengthDelimited: {
+      value_ = DecodeVarint(data);
+      data_ = data->subspan(
+          0, static_cast<size_t>(std::min<uint64_t>(value_, data->size())));
+      data->remove_prefix(data_.size());
+      break;
+    }
+    case WireType::k32Bit:
+      value_ = Decode32Bit(data);
+      break;
+  }
+  return true;
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/proto.h

@@ -0,0 +1,288 @@
+// Copyright 2020 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// -----------------------------------------------------------------------------
+// File: internal/proto.h
+// -----------------------------------------------------------------------------
+//
+// Declares functions for serializing and deserializing data to and from memory
+// buffers in protocol buffer wire format.  This library takes no steps to
+// ensure that the encoded data matches with any message specification.
+
+#ifndef ABSL_LOG_INTERNAL_PROTO_H_
+#define ABSL_LOG_INTERNAL_PROTO_H_
+
+#include <cstddef>
+#include <cstdint>
+#include <limits>
+
+#include "absl/base/attributes.h"
+#include "absl/base/casts.h"
+#include "absl/base/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+// absl::Span<char> represents a view into the available space in a mutable
+// buffer during encoding.  Encoding functions shrink the span as they go so
+// that the same view can be passed to a series of Encode functions.  If the
+// data do not fit, nothing is encoded, the view is set to size zero (so that
+// all subsequent encode calls fail), and false is returned.  Otherwise true is
+// returned.
+
+// In particular, attempting to encode a series of data into an insufficient
+// buffer has consistent and efficient behavior without any caller-side error
+// checking.  Individual values will be encoded in their entirety or not at all
+// (unless one of the `Truncate` functions is used).  Once a value is omitted
+// because it does not fit, no subsequent values will be encoded to preserve
+// ordering; the decoded sequence will be a prefix of the original sequence.
+
+// There are two ways to encode a message-typed field:
+//
+// * Construct its contents in a separate buffer and use `EncodeBytes` to copy
+//   it into the primary buffer with type, tag, and length.
+// * Use `EncodeMessageStart` to write type and tag fields and reserve space for
+//   the length field, then encode the contents directly into the buffer, then
+//   use `EncodeMessageLength` to write the actual length into the reserved
+//   bytes.  This works fine if the actual length takes fewer bytes to encode
+//   than were reserved, although you don't get your extra bytes back.
+//   This approach will always produce a valid encoding, but your protocol may
+//   require that the whole message field by omitted if the buffer is too small
+//   to contain all desired subfields.  In this case, operate on a copy of the
+//   buffer view and assign back only if everything fit, i.e. if the last
+//   `Encode` call returned true.
+
+// Encodes the specified integer as a varint field and returns true if it fits.
+// Used for int32_t, int64_t, uint32_t, uint64_t, bool, and enum field types.
+// Consumes up to kMaxVarintSize * 2 bytes (20).
+bool EncodeVarint(uint64_t tag, uint64_t value, absl::Span<char> *buf);
+inline bool EncodeVarint(uint64_t tag, int64_t value, absl::Span<char> *buf) {
+  return EncodeVarint(tag, static_cast<uint64_t>(value), buf);
+}
+inline bool EncodeVarint(uint64_t tag, uint32_t value, absl::Span<char> *buf) {
+  return EncodeVarint(tag, static_cast<uint64_t>(value), buf);
+}
+inline bool EncodeVarint(uint64_t tag, int32_t value, absl::Span<char> *buf) {
+  return EncodeVarint(tag, static_cast<uint64_t>(value), buf);
+}
+
+// Encodes the specified integer as a varint field using ZigZag encoding and
+// returns true if it fits.
+// Used for sint32 and sint64 field types.
+// Consumes up to kMaxVarintSize * 2 bytes (20).
+inline bool EncodeVarintZigZag(uint64_t tag, int64_t value,
+                               absl::Span<char> *buf) {
+  if (value < 0)
+    return EncodeVarint(tag, 2 * static_cast<uint64_t>(-(value + 1)) + 1, buf);
+  return EncodeVarint(tag, 2 * static_cast<uint64_t>(value), buf);
+}
+
+// Encodes the specified integer as a 64-bit field and returns true if it fits.
+// Used for fixed64 and sfixed64 field types.
+// Consumes up to kMaxVarintSize + 8 bytes (18).
+bool Encode64Bit(uint64_t tag, uint64_t value, absl::Span<char> *buf);
+inline bool Encode64Bit(uint64_t tag, int64_t value, absl::Span<char> *buf) {
+  return Encode64Bit(tag, static_cast<uint64_t>(value), buf);
+}
+inline bool Encode64Bit(uint64_t tag, uint32_t value, absl::Span<char> *buf) {
+  return Encode64Bit(tag, static_cast<uint64_t>(value), buf);
+}
+inline bool Encode64Bit(uint64_t tag, int32_t value, absl::Span<char> *buf) {
+  return Encode64Bit(tag, static_cast<uint64_t>(value), buf);
+}
+
+// Encodes the specified double as a 64-bit field and returns true if it fits.
+// Used for double field type.
+// Consumes up to kMaxVarintSize + 8 bytes (18).
+inline bool EncodeDouble(uint64_t tag, double value, absl::Span<char> *buf) {
+  return Encode64Bit(tag, absl::bit_cast<uint64_t>(value), buf);
+}
+
+// Encodes the specified integer as a 32-bit field and returns true if it fits.
+// Used for fixed32 and sfixed32 field types.
+// Consumes up to kMaxVarintSize + 4 bytes (14).
+bool Encode32Bit(uint64_t tag, uint32_t value, absl::Span<char> *buf);
+inline bool Encode32Bit(uint64_t tag, int32_t value, absl::Span<char> *buf) {
+  return Encode32Bit(tag, static_cast<uint32_t>(value), buf);
+}
+
+// Encodes the specified float as a 32-bit field and returns true if it fits.
+// Used for float field type.
+// Consumes up to kMaxVarintSize + 4 bytes (14).
+inline bool EncodeFloat(uint64_t tag, float value, absl::Span<char> *buf) {
+  return Encode32Bit(tag, absl::bit_cast<uint32_t>(value), buf);
+}
+
+// Encodes the specified bytes as a length-delimited field and returns true if
+// they fit.
+// Used for string, bytes, message, and packed-repeated field type.
+// Consumes up to kMaxVarintSize * 2 + value.size() bytes (20 + value.size()).
+bool EncodeBytes(uint64_t tag, absl::Span<const char> value,
+                 absl::Span<char> *buf);
+
+// Encodes as many of the specified bytes as will fit as a length-delimited
+// field and returns true as long as the field header (`tag_type` and `length`)
+// fits.
+// Used for string, bytes, message, and packed-repeated field type.
+// Consumes up to kMaxVarintSize * 2 + value.size() bytes (20 + value.size()).
+bool EncodeBytesTruncate(uint64_t tag, absl::Span<const char> value,
+                         absl::Span<char> *buf);
+
+// Encodes the specified string as a length-delimited field and returns true if
+// it fits.
+// Used for string, bytes, message, and packed-repeated field type.
+// Consumes up to kMaxVarintSize * 2 + value.size() bytes (20 + value.size()).
+inline bool EncodeString(uint64_t tag, absl::string_view value,
+                         absl::Span<char> *buf) {
+  return EncodeBytes(tag, value, buf);
+}
+
+// Encodes as much of the specified string as will fit as a length-delimited
+// field and returns true as long as the field header (`tag_type` and `length`)
+// fits.
+// Used for string, bytes, message, and packed-repeated field type.
+// Consumes up to kMaxVarintSize * 2 + value.size() bytes (20 + value.size()).
+inline bool EncodeStringTruncate(uint64_t tag, absl::string_view value,
+                                 absl::Span<char> *buf) {
+  return EncodeBytesTruncate(tag, value, buf);
+}
+
+// Encodes the header for a length-delimited field containing up to `max_size`
+// bytes or the number remaining in the buffer, whichever is less.  If the
+// header fits, a non-nullptr `Span` is returned; this must be passed to
+// `EncodeMessageLength` after all contents are encoded to finalize the length
+// field.  If the header does not fit, a nullptr `Span` is returned which is
+// safe to pass to `EncodeMessageLength` but need not be.
+// Used for string, bytes, message, and packed-repeated field type.
+// Consumes up to kMaxVarintSize * 2 bytes (20).
+ABSL_MUST_USE_RESULT absl::Span<char> EncodeMessageStart(uint64_t tag,
+                                                         uint64_t max_size,
+                                                         absl::Span<char> *buf);
+
+// Finalizes the length field in `msg` so that it encompasses all data encoded
+// since the call to `EncodeMessageStart` which returned `msg`.  Does nothing if
+// `msg` is a `nullptr` `Span`.
+void EncodeMessageLength(absl::Span<char> msg, const absl::Span<char> *buf);
+
+enum class WireType : uint64_t {
+  kVarint = 0,
+  k64Bit = 1,
+  kLengthDelimited = 2,
+  k32Bit = 5,
+};
+
+constexpr size_t VarintSize(uint64_t value) {
+  return value < 128 ? 1 : 1 + VarintSize(value >> 7);
+}
+constexpr size_t MinVarintSize() {
+  return VarintSize((std::numeric_limits<uint64_t>::min)());
+}
+constexpr size_t MaxVarintSize() {
+  return VarintSize((std::numeric_limits<uint64_t>::max)());
+}
+
+constexpr uint64_t MaxVarintForSize(size_t size) {
+  return size >= 10 ? (std::numeric_limits<uint64_t>::max)()
+                    : (static_cast<uint64_t>(1) << size * 7) - 1;
+}
+
+// `BufferSizeFor` returns a number of bytes guaranteed to be sufficient to
+// store encoded fields of the specified WireTypes regardless of tag numbers and
+// data values.  This only makes sense for `WireType::kLengthDelimited` if you
+// add in the length of the contents yourself, e.g. for string and bytes fields
+// by adding the lengths of any encoded strings to the return value or for
+// submessage fields by enumerating the fields you may encode into their
+// contents.
+constexpr size_t BufferSizeFor() { return 0; }
+template <typename... T>
+constexpr size_t BufferSizeFor(WireType type, T... tail) {
+  // tag_type + data + ...
+  return MaxVarintSize() +
+         (type == WireType::kVarint ? MaxVarintSize() :              //
+              type == WireType::k64Bit ? 8 :                         //
+                  type == WireType::k32Bit ? 4 : MaxVarintSize()) +  //
+         BufferSizeFor(tail...);
+}
+
+// absl::Span<const char> represents a view into the un-processed space in a
+// buffer during decoding.  Decoding functions shrink the span as they go so
+// that the same view can be decoded iteratively until all data are processed.
+// In general, if the buffer is exhausted but additional bytes are expected by
+// the decoder, it will return values as if the additional bytes were zeros.
+// Length-delimited fields are an exception - if the encoded length field
+// indicates more data bytes than are available in the buffer, the `bytes_value`
+// and `string_value` accessors will return truncated views.
+
+class ProtoField final {
+ public:
+  // Consumes bytes from `data` and returns true if there were any bytes to
+  // decode.
+  bool DecodeFrom(absl::Span<const char> *data);
+  uint64_t tag() const { return tag_; }
+  WireType type() const { return type_; }
+
+  // These value accessors will return nonsense if the data were not encoded in
+  // the corresponding wiretype from the corresponding C++ (or other language)
+  // type.
+
+  double double_value() const { return absl::bit_cast<double>(value_); }
+  float float_value() const {
+    return absl::bit_cast<float>(static_cast<uint32_t>(value_));
+  }
+  int32_t int32_value() const { return static_cast<int32_t>(value_); }
+  int64_t int64_value() const { return static_cast<int64_t>(value_); }
+  int32_t sint32_value() const {
+    if (value_ % 2) return static_cast<int32_t>(0 - ((value_ - 1) / 2) - 1);
+    return static_cast<int32_t>(value_ / 2);
+  }
+  int64_t sint64_value() const {
+    if (value_ % 2) return 0 - ((value_ - 1) / 2) - 1;
+    return value_ / 2;
+  }
+  uint32_t uint32_value() const { return static_cast<uint32_t>(value_); }
+  uint64_t uint64_value() const { return value_; }
+  bool bool_value() const { return value_ != 0; }
+  // To decode an enum, call int32_value() and cast to the appropriate type.
+  // Note that the official C++ proto compiler treats enum fields with values
+  // that do not correspond to a defined enumerator as unknown fields.
+
+  // To decode fields within a submessage field, call
+  // `DecodeNextField(field.BytesValue())`.
+  absl::Span<const char> bytes_value() const { return data_; }
+  absl::string_view string_value() const {
+    const auto data = bytes_value();
+    return absl::string_view(data.data(), data.size());
+  }
+  // Returns the encoded length of a length-delimited field.  This equals
+  // `bytes_value().size()` except when the latter has been truncated due to
+  // buffer underrun.
+  uint64_t encoded_length() const { return value_; }
+
+ private:
+  uint64_t tag_;
+  WireType type_;
+  // For `kTypeVarint`, `kType64Bit`, and `kType32Bit`, holds the decoded value.
+  // For `kTypeLengthDelimited`, holds the decoded length.
+  uint64_t value_;
+  absl::Span<const char> data_;
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_PROTO_H_

Pods/abseil/absl/log/internal/strip.h

@@ -0,0 +1,108 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/strip.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_LOG_INTERNAL_STRIP_H_
+#define ABSL_LOG_INTERNAL_STRIP_H_
+
+#include "absl/base/attributes.h"  // IWYU pragma: keep
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/log_message.h"
+#include "absl/log/internal/nullstream.h"
+
+// `ABSL_LOGGING_INTERNAL_LOG_*` evaluates to a temporary `LogMessage` object or
+// to a related object with a compatible API but different behavior.  This set
+// of defines comes in three flavors: vanilla, plus two variants that strip some
+// logging in subtly different ways for subtly different reasons (see below).
+#if defined(STRIP_LOG) && STRIP_LOG
+
+// Attribute for marking variables used in implementation details of logging
+// macros as unused, but only when `STRIP_LOG` is defined.
+// With `STRIP_LOG` on, not marking them triggers `-Wunused-but-set-variable`,
+// With `STRIP_LOG` off, marking them triggers `-Wused-but-marked-unused`.
+//
+// TODO(b/290784225): Replace this macro with attribute [[maybe_unused]] when
+// Abseil stops supporting C++14.
+#define ABSL_LOG_INTERNAL_ATTRIBUTE_UNUSED_IF_STRIP_LOG ABSL_ATTRIBUTE_UNUSED
+
+#define ABSL_LOGGING_INTERNAL_LOG_INFO ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_WARNING ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_ERROR ::absl::log_internal::NullStream()
+#define ABSL_LOGGING_INTERNAL_LOG_FATAL ::absl::log_internal::NullStreamFatal()
+#define ABSL_LOGGING_INTERNAL_LOG_QFATAL ::absl::log_internal::NullStreamFatal()
+#define ABSL_LOGGING_INTERNAL_LOG_DFATAL \
+  ::absl::log_internal::NullStreamMaybeFatal(::absl::kLogDebugFatal)
+#define ABSL_LOGGING_INTERNAL_LOG_LEVEL(severity) \
+  ::absl::log_internal::NullStreamMaybeFatal(absl_log_internal_severity)
+
+// Fatal `DLOG`s expand a little differently to avoid being `[[noreturn]]`.
+#define ABSL_LOGGING_INTERNAL_DLOG_FATAL \
+  ::absl::log_internal::NullStreamMaybeFatal(::absl::LogSeverity::kFatal)
+#define ABSL_LOGGING_INTERNAL_DLOG_QFATAL \
+  ::absl::log_internal::NullStreamMaybeFatal(::absl::LogSeverity::kFatal)
+
+#define ABSL_LOG_INTERNAL_CHECK(failure_message) ABSL_LOGGING_INTERNAL_LOG_FATAL
+#define ABSL_LOG_INTERNAL_QCHECK(failure_message) \
+  ABSL_LOGGING_INTERNAL_LOG_QFATAL
+
+#else  // !defined(STRIP_LOG) || !STRIP_LOG
+
+#define ABSL_LOG_INTERNAL_ATTRIBUTE_UNUSED_IF_STRIP_LOG
+
+#define ABSL_LOGGING_INTERNAL_LOG_INFO \
+  ::absl::log_internal::LogMessage(    \
+      __FILE__, __LINE__, ::absl::log_internal::LogMessage::InfoTag{})
+#define ABSL_LOGGING_INTERNAL_LOG_WARNING \
+  ::absl::log_internal::LogMessage(       \
+      __FILE__, __LINE__, ::absl::log_internal::LogMessage::WarningTag{})
+#define ABSL_LOGGING_INTERNAL_LOG_ERROR \
+  ::absl::log_internal::LogMessage(     \
+      __FILE__, __LINE__, ::absl::log_internal::LogMessage::ErrorTag{})
+#define ABSL_LOGGING_INTERNAL_LOG_FATAL \
+  ::absl::log_internal::LogMessageFatal(__FILE__, __LINE__)
+#define ABSL_LOGGING_INTERNAL_LOG_QFATAL \
+  ::absl::log_internal::LogMessageQuietlyFatal(__FILE__, __LINE__)
+#define ABSL_LOGGING_INTERNAL_LOG_DFATAL \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, ::absl::kLogDebugFatal)
+#define ABSL_LOGGING_INTERNAL_LOG_LEVEL(severity)      \
+  ::absl::log_internal::LogMessage(__FILE__, __LINE__, \
+                                   absl_log_internal_severity)
+
+// Fatal `DLOG`s expand a little differently to avoid being `[[noreturn]]`.
+#define ABSL_LOGGING_INTERNAL_DLOG_FATAL \
+  ::absl::log_internal::LogMessageDebugFatal(__FILE__, __LINE__)
+#define ABSL_LOGGING_INTERNAL_DLOG_QFATAL \
+  ::absl::log_internal::LogMessageQuietlyDebugFatal(__FILE__, __LINE__)
+
+// These special cases dispatch to special-case constructors that allow us to
+// avoid an extra function call and shrink non-LTO binaries by a percent or so.
+#define ABSL_LOG_INTERNAL_CHECK(failure_message) \
+  ::absl::log_internal::LogMessageFatal(__FILE__, __LINE__, failure_message)
+#define ABSL_LOG_INTERNAL_QCHECK(failure_message)                  \
+  ::absl::log_internal::LogMessageQuietlyFatal(__FILE__, __LINE__, \
+                                               failure_message)
+#endif  // !defined(STRIP_LOG) || !STRIP_LOG
+
+// This part of a non-fatal `DLOG`s expands the same as `LOG`.
+#define ABSL_LOGGING_INTERNAL_DLOG_INFO ABSL_LOGGING_INTERNAL_LOG_INFO
+#define ABSL_LOGGING_INTERNAL_DLOG_WARNING ABSL_LOGGING_INTERNAL_LOG_WARNING
+#define ABSL_LOGGING_INTERNAL_DLOG_ERROR ABSL_LOGGING_INTERNAL_LOG_ERROR
+#define ABSL_LOGGING_INTERNAL_DLOG_DFATAL ABSL_LOGGING_INTERNAL_LOG_DFATAL
+#define ABSL_LOGGING_INTERNAL_DLOG_LEVEL ABSL_LOGGING_INTERNAL_LOG_LEVEL
+
+#endif  // ABSL_LOG_INTERNAL_STRIP_H_

Pods/abseil/absl/log/internal/vlog_config.cc

@@ -0,0 +1,340 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/internal/vlog_config.h"
+
+#include <stddef.h>
+
+#include <algorithm>
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/const_init.h"
+#include "absl/base/internal/spinlock.h"
+#include "absl/base/no_destructor.h"
+#include "absl/base/optimization.h"
+#include "absl/base/thread_annotations.h"
+#include "absl/log/internal/fnmatch.h"
+#include "absl/memory/memory.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_split.h"
+#include "absl/strings/string_view.h"
+#include "absl/strings/strip.h"
+#include "absl/synchronization/mutex.h"
+#include "absl/types/optional.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+namespace {
+bool ModuleIsPath(absl::string_view module_pattern) {
+#ifdef _WIN32
+  return module_pattern.find_first_of("/\\") != module_pattern.npos;
+#else
+  return module_pattern.find('/') != module_pattern.npos;
+#endif
+}
+}  // namespace
+
+bool VLogSite::SlowIsEnabled(int stale_v, int level) {
+  if (ABSL_PREDICT_TRUE(stale_v != kUninitialized)) {
+    // Because of the prerequisites to this function, we know that stale_v is
+    // either uninitialized or >= level. If it's not uninitialized, that means
+    // it must be >= level, thus we should log.
+    return true;
+  }
+  stale_v = log_internal::RegisterAndInitialize(this);
+  return ABSL_PREDICT_FALSE(stale_v >= level);
+}
+
+bool VLogSite::SlowIsEnabled0(int stale_v) { return SlowIsEnabled(stale_v, 0); }
+bool VLogSite::SlowIsEnabled1(int stale_v) { return SlowIsEnabled(stale_v, 1); }
+bool VLogSite::SlowIsEnabled2(int stale_v) { return SlowIsEnabled(stale_v, 2); }
+bool VLogSite::SlowIsEnabled3(int stale_v) { return SlowIsEnabled(stale_v, 3); }
+bool VLogSite::SlowIsEnabled4(int stale_v) { return SlowIsEnabled(stale_v, 4); }
+bool VLogSite::SlowIsEnabled5(int stale_v) { return SlowIsEnabled(stale_v, 5); }
+
+namespace {
+struct VModuleInfo final {
+  std::string module_pattern;
+  bool module_is_path;  // i.e. it contains a path separator.
+  int vlog_level;
+
+  // Allocates memory.
+  VModuleInfo(absl::string_view module_pattern_arg, bool module_is_path_arg,
+              int vlog_level_arg)
+      : module_pattern(std::string(module_pattern_arg)),
+        module_is_path(module_is_path_arg),
+        vlog_level(vlog_level_arg) {}
+};
+
+// `mutex` guards all of the data structures that aren't lock-free.
+// To avoid problems with the heap checker which calls into `VLOG`, `mutex` must
+// be a `SpinLock` that prevents fiber scheduling instead of a `Mutex`.
+ABSL_CONST_INIT absl::base_internal::SpinLock mutex(
+    absl::kConstInit, absl::base_internal::SCHEDULE_KERNEL_ONLY);
+
+// `GetUpdateSitesMutex()` serializes updates to all of the sites (i.e. those in
+// `site_list_head`) themselves.
+absl::Mutex* GetUpdateSitesMutex() {
+  // Chromium requires no global destructors, so we can't use the
+  // absl::kConstInit idiom since absl::Mutex as a non-trivial destructor.
+  static absl::NoDestructor<absl::Mutex> update_sites_mutex ABSL_ACQUIRED_AFTER(
+      mutex);
+  return update_sites_mutex.get();
+}
+
+ABSL_CONST_INIT int global_v ABSL_GUARDED_BY(mutex) = 0;
+// `site_list_head` is the head of a singly-linked list.  Traversal, insertion,
+// and reads are atomic, so no locks are required, but updates to existing
+// elements are guarded by `GetUpdateSitesMutex()`.
+ABSL_CONST_INIT std::atomic<VLogSite*> site_list_head{nullptr};
+ABSL_CONST_INIT std::vector<VModuleInfo>* vmodule_info ABSL_GUARDED_BY(mutex)
+    ABSL_PT_GUARDED_BY(mutex){nullptr};
+
+// Only used for lisp.
+ABSL_CONST_INIT std::vector<std::function<void()>>* update_callbacks
+    ABSL_GUARDED_BY(GetUpdateSitesMutex())
+        ABSL_PT_GUARDED_BY(GetUpdateSitesMutex()){nullptr};
+
+// Allocates memory.
+std::vector<VModuleInfo>& get_vmodule_info()
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex) {
+  if (!vmodule_info) vmodule_info = new std::vector<VModuleInfo>;
+  return *vmodule_info;
+}
+
+// Does not allocate or take locks.
+int VLogLevel(absl::string_view file, const std::vector<VModuleInfo>* infos,
+              int current_global_v) {
+  // `infos` is null during a call to `VLOG` prior to setting `vmodule` (e.g. by
+  // parsing flags).  We can't allocate in `VLOG`, so we treat null as empty
+  // here and press on.
+  if (!infos || infos->empty()) return current_global_v;
+  // Get basename for file
+  absl::string_view basename = file;
+  {
+    const size_t sep = basename.rfind('/');
+    if (sep != basename.npos) {
+      basename.remove_prefix(sep + 1);
+#ifdef _WIN32
+    } else {
+      const size_t sep = basename.rfind('\\');
+      if (sep != basename.npos) basename.remove_prefix(sep + 1);
+#endif
+    }
+  }
+
+  absl::string_view stem = file, stem_basename = basename;
+  {
+    const size_t sep = stem_basename.find('.');
+    if (sep != stem_basename.npos) {
+      stem.remove_suffix(stem_basename.size() - sep);
+      stem_basename.remove_suffix(stem_basename.size() - sep);
+    }
+    if (absl::ConsumeSuffix(&stem_basename, "-inl")) {
+      stem.remove_suffix(absl::string_view("-inl").size());
+    }
+  }
+  for (const auto& info : *infos) {
+    if (info.module_is_path) {
+      // If there are any slashes in the pattern, try to match the full
+      // name.
+      if (FNMatch(info.module_pattern, stem)) {
+        return info.vlog_level == kUseFlag ? current_global_v : info.vlog_level;
+      }
+    } else if (FNMatch(info.module_pattern, stem_basename)) {
+      return info.vlog_level == kUseFlag ? current_global_v : info.vlog_level;
+    }
+  }
+
+  return current_global_v;
+}
+
+// Allocates memory.
+int AppendVModuleLocked(absl::string_view module_pattern, int log_level)
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex) {
+  for (const auto& info : get_vmodule_info()) {
+    if (FNMatch(info.module_pattern, module_pattern)) {
+      // This is a memory optimization to avoid storing patterns that will never
+      // match due to exit early semantics. Primarily optimized for our own unit
+      // tests.
+      return info.vlog_level;
+    }
+  }
+  bool module_is_path = ModuleIsPath(module_pattern);
+  get_vmodule_info().emplace_back(std::string(module_pattern), module_is_path,
+                                  log_level);
+  return global_v;
+}
+
+// Allocates memory.
+int PrependVModuleLocked(absl::string_view module_pattern, int log_level)
+    ABSL_EXCLUSIVE_LOCKS_REQUIRED(mutex) {
+  absl::optional<int> old_log_level;
+  for (const auto& info : get_vmodule_info()) {
+    if (FNMatch(info.module_pattern, module_pattern)) {
+      old_log_level = info.vlog_level;
+      break;
+    }
+  }
+  bool module_is_path = ModuleIsPath(module_pattern);
+  auto iter = get_vmodule_info().emplace(get_vmodule_info().cbegin(),
+                                         std::string(module_pattern),
+                                         module_is_path, log_level);
+
+  // This is a memory optimization to avoid storing patterns that will never
+  // match due to exit early semantics. Primarily optimized for our own unit
+  // tests.
+  get_vmodule_info().erase(
+      std::remove_if(++iter, get_vmodule_info().end(),
+                     [module_pattern](const VModuleInfo& info) {
+                       return FNMatch(info.module_pattern, module_pattern);
+                     }),
+      get_vmodule_info().cend());
+  return old_log_level.value_or(global_v);
+}
+}  // namespace
+
+int VLogLevel(absl::string_view file) ABSL_LOCKS_EXCLUDED(mutex) {
+  absl::base_internal::SpinLockHolder l(&mutex);
+  return VLogLevel(file, vmodule_info, global_v);
+}
+
+int RegisterAndInitialize(VLogSite* v) ABSL_LOCKS_EXCLUDED(mutex) {
+  // std::memory_order_seq_cst is overkill in this function, but given that this
+  // path is intended to be slow, it's not worth the brain power to relax that.
+  VLogSite* h = site_list_head.load(std::memory_order_seq_cst);
+
+  VLogSite* old = nullptr;
+  if (v->next_.compare_exchange_strong(old, h, std::memory_order_seq_cst,
+                                       std::memory_order_seq_cst)) {
+    // Multiple threads may attempt to register this site concurrently.
+    // By successfully setting `v->next` this thread commits to being *the*
+    // thread that installs `v` in the list.
+    while (!site_list_head.compare_exchange_weak(
+        h, v, std::memory_order_seq_cst, std::memory_order_seq_cst)) {
+      v->next_.store(h, std::memory_order_seq_cst);
+    }
+  }
+
+  int old_v = VLogSite::kUninitialized;
+  int new_v = VLogLevel(v->file_);
+  // No loop, if someone else set this, we should respect their evaluation of
+  // `VLogLevel`. This may mean we return a stale `v`, but `v` itself will
+  // always arrive at the freshest value.  Otherwise, we could be writing a
+  // stale value and clobbering the fresher one.
+  if (v->v_.compare_exchange_strong(old_v, new_v, std::memory_order_seq_cst,
+                                    std::memory_order_seq_cst)) {
+    return new_v;
+  }
+  return old_v;
+}
+
+void UpdateVLogSites() ABSL_UNLOCK_FUNCTION(mutex)
+    ABSL_LOCKS_EXCLUDED(GetUpdateSitesMutex()) {
+  std::vector<VModuleInfo> infos = get_vmodule_info();
+  int current_global_v = global_v;
+  // We need to grab `GetUpdateSitesMutex()` before we release `mutex` to ensure
+  // that updates are not interleaved (resulting in an inconsistent final state)
+  // and to ensure that the final state in the sites matches the final state of
+  // `vmodule_info`. We unlock `mutex` to ensure that uninitialized sites don't
+  // have to wait on all updates in order to acquire `mutex` and initialize
+  // themselves.
+  absl::MutexLock ul(GetUpdateSitesMutex());
+  mutex.Unlock();
+  VLogSite* n = site_list_head.load(std::memory_order_seq_cst);
+  // Because sites are added to the list in the order they are executed, there
+  // tend to be clusters of entries with the same file.
+  const char* last_file = nullptr;
+  int last_file_level = 0;
+  while (n != nullptr) {
+    if (n->file_ != last_file) {
+      last_file = n->file_;
+      last_file_level = VLogLevel(n->file_, &infos, current_global_v);
+    }
+    n->v_.store(last_file_level, std::memory_order_seq_cst);
+    n = n->next_.load(std::memory_order_seq_cst);
+  }
+  if (update_callbacks) {
+    for (auto& cb : *update_callbacks) {
+      cb();
+    }
+  }
+}
+
+void UpdateVModule(absl::string_view vmodule)
+    ABSL_LOCKS_EXCLUDED(mutex, GetUpdateSitesMutex()) {
+  std::vector<std::pair<absl::string_view, int>> glob_levels;
+  for (absl::string_view glob_level : absl::StrSplit(vmodule, ',')) {
+    const size_t eq = glob_level.rfind('=');
+    if (eq == glob_level.npos) continue;
+    const absl::string_view glob = glob_level.substr(0, eq);
+    int level;
+    if (!absl::SimpleAtoi(glob_level.substr(eq + 1), &level)) continue;
+    glob_levels.emplace_back(glob, level);
+  }
+  mutex.Lock();  // Unlocked by UpdateVLogSites().
+  get_vmodule_info().clear();
+  for (const auto& it : glob_levels) {
+    const absl::string_view glob = it.first;
+    const int level = it.second;
+    AppendVModuleLocked(glob, level);
+  }
+  UpdateVLogSites();
+}
+
+int UpdateGlobalVLogLevel(int v)
+    ABSL_LOCKS_EXCLUDED(mutex, GetUpdateSitesMutex()) {
+  mutex.Lock();  // Unlocked by UpdateVLogSites().
+  const int old_global_v = global_v;
+  if (v == global_v) {
+    mutex.Unlock();
+    return old_global_v;
+  }
+  global_v = v;
+  UpdateVLogSites();
+  return old_global_v;
+}
+
+int PrependVModule(absl::string_view module_pattern, int log_level)
+    ABSL_LOCKS_EXCLUDED(mutex, GetUpdateSitesMutex()) {
+  mutex.Lock();  // Unlocked by UpdateVLogSites().
+  int old_v = PrependVModuleLocked(module_pattern, log_level);
+  UpdateVLogSites();
+  return old_v;
+}
+
+void OnVLogVerbosityUpdate(std::function<void()> cb)
+    ABSL_LOCKS_EXCLUDED(GetUpdateSitesMutex()) {
+  absl::MutexLock ul(GetUpdateSitesMutex());
+  if (!update_callbacks)
+    update_callbacks = new std::vector<std::function<void()>>;
+  update_callbacks->push_back(std::move(cb));
+}
+
+VLogSite* SetVModuleListHeadForTestOnly(VLogSite* v) {
+  return site_list_head.exchange(v, std::memory_order_seq_cst);
+}
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/internal/vlog_config.h

@@ -0,0 +1,163 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// vlog_config.h
+// -----------------------------------------------------------------------------
+//
+// This header file defines `VLogSite`, a public primitive that represents
+// a callsite for the `VLOG` family of macros and related libraries.
+// It also declares and defines multiple internal utilities used to implement
+// `VLOG`, such as `VLogSiteManager`.
+
+#ifndef ABSL_LOG_INTERNAL_VLOG_CONFIG_H_
+#define ABSL_LOG_INTERNAL_VLOG_CONFIG_H_
+
+// IWYU pragma: private, include "absl/log/log.h"
+
+#include <atomic>
+#include <cstdint>
+#include <functional>
+#include <limits>
+#include <type_traits>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/optimization.h"
+#include "absl/base/thread_annotations.h"
+#include "absl/strings/string_view.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+class SyntheticBinary;
+class VLogSite;
+
+int RegisterAndInitialize(VLogSite* v);
+void UpdateVLogSites();
+constexpr int kUseFlag = (std::numeric_limits<int16_t>::min)();
+
+// Represents a unique callsite for a `VLOG()` or `VLOG_IS_ON()` call.
+//
+// Libraries that provide `VLOG`-like functionality should use this to
+// efficiently handle --vmodule.
+//
+// VLogSite objects must not be destroyed until the program exits. Doing so will
+// probably yield nasty segfaults in VLogSiteManager::UpdateLogSites(). The
+// recommendation is to make all such objects function-local statics.
+class VLogSite final {
+ public:
+  // `f` must not be destroyed until the program exits.
+  explicit constexpr VLogSite(const char* f)
+      : file_(f), v_(kUninitialized), next_(nullptr) {}
+  VLogSite(const VLogSite&) = delete;
+  VLogSite& operator=(const VLogSite&) = delete;
+
+  // Inlining the function yields a ~3x performance improvement at the cost of a
+  // 1.5x code size increase at the call site.
+  // Takes locks but does not allocate memory.
+  ABSL_ATTRIBUTE_ALWAYS_INLINE
+  bool IsEnabled(int level) {
+    int stale_v = v_.load(std::memory_order_relaxed);
+    if (ABSL_PREDICT_TRUE(level > stale_v)) {
+      return false;
+    }
+
+    // We put everything other than the fast path, i.e. vlogging is initialized
+    // but not on, behind an out-of-line function to reduce code size.
+    // "level" is almost always a call-site constant, so we can save a bit
+    // of code space by special-casing for a few common levels.
+#if ABSL_HAVE_BUILTIN(__builtin_constant_p) || defined(__GNUC__)
+    if (__builtin_constant_p(level)) {
+      if (level == 0) return SlowIsEnabled0(stale_v);
+      if (level == 1) return SlowIsEnabled1(stale_v);
+      if (level == 2) return SlowIsEnabled2(stale_v);
+      if (level == 3) return SlowIsEnabled3(stale_v);
+      if (level == 4) return SlowIsEnabled4(stale_v);
+      if (level == 5) return SlowIsEnabled5(stale_v);
+    }
+#endif
+    return SlowIsEnabled(stale_v, level);
+  }
+
+ private:
+  friend int log_internal::RegisterAndInitialize(VLogSite* v);
+  friend void log_internal::UpdateVLogSites();
+  friend class log_internal::SyntheticBinary;
+  static constexpr int kUninitialized = (std::numeric_limits<int>::max)();
+
+  // SlowIsEnabled performs slower checks to determine whether a log site is
+  // enabled. Because it is expected to be called somewhat rarely
+  // (comparatively), it is not inlined to save on code size.
+  //
+  // Prerequisites to calling SlowIsEnabled:
+  //   1) stale_v is uninitialized OR
+  //   2) stale_v is initialized and >= level (meaning we must log).
+  // Takes locks but does not allocate memory.
+  ABSL_ATTRIBUTE_NOINLINE
+  bool SlowIsEnabled(int stale_v, int level);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled0(int stale_v);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled1(int stale_v);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled2(int stale_v);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled3(int stale_v);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled4(int stale_v);
+  ABSL_ATTRIBUTE_NOINLINE bool SlowIsEnabled5(int stale_v);
+
+  // This object is too size-sensitive to use absl::string_view.
+  const char* const file_;
+  std::atomic<int> v_;
+  std::atomic<VLogSite*> next_;
+};
+static_assert(std::is_trivially_destructible<VLogSite>::value,
+              "VLogSite must be trivially destructible");
+
+// Returns the current verbose log level of `file`.
+// Does not allocate memory.
+int VLogLevel(absl::string_view file);
+
+// Registers a site `v` to get updated as `vmodule` and `v` change.  Also
+// initializes the site based on their current values, and returns that result.
+// Does not allocate memory.
+int RegisterAndInitialize(VLogSite* v);
+
+// Allocates memory.
+void UpdateVLogSites();
+
+// Completely overwrites the saved value of `vmodule`.
+// Allocates memory.
+void UpdateVModule(absl::string_view vmodule);
+
+// Updates the global verbosity level to `v` and returns the prior value.
+// Allocates memory.
+int UpdateGlobalVLogLevel(int v);
+
+// Atomically prepends `module_pattern=log_level` to the start of vmodule.
+// Returns the prior value for `module_pattern` if there was an exact match and
+// `global_v` otherwise.
+// Allocates memory.
+int PrependVModule(absl::string_view module_pattern, int log_level);
+
+// Registers `on_update` to be called whenever `v` or `vmodule` change.
+// Allocates memory.
+void OnVLogVerbosityUpdate(std::function<void()> cb);
+
+// Does not allocate memory.
+VLogSite* SetVModuleListHeadForTestOnly(VLogSite* v);
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_VLOG_CONFIG_H_

Pods/abseil/absl/log/internal/voidify.h

@@ -0,0 +1,44 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/internal/voidify.h
+// -----------------------------------------------------------------------------
+//
+// This class is used to explicitly ignore values in the conditional logging
+// macros. This avoids compiler warnings like "value computed is not used" and
+// "statement has no effect".
+
+#ifndef ABSL_LOG_INTERNAL_VOIDIFY_H_
+#define ABSL_LOG_INTERNAL_VOIDIFY_H_
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace log_internal {
+
+class Voidify final {
+ public:
+  // This has to be an operator with a precedence lower than << but higher than
+  // ?:
+  template <typename T>
+  void operator&&(const T&) const&& {}
+};
+
+}  // namespace log_internal
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_INTERNAL_VOIDIFY_H_

Pods/abseil/absl/log/log.h

@@ -0,0 +1,365 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log.h
+// -----------------------------------------------------------------------------
+//
+// This header declares a family of LOG macros.
+//
+// Basic invocation looks like this:
+//
+//   LOG(INFO) << "Found " << num_cookies << " cookies";
+//
+// Most `LOG` macros take a severity level argument.  The severity levels are
+// `INFO`, `WARNING`, `ERROR`, and `FATAL`.  They are defined
+// in absl/base/log_severity.h.
+// * The `FATAL` severity level terminates the program with a stack trace after
+//   logging its message.  Error handlers registered with `RunOnFailure`
+//   (process_state.h) are run, but exit handlers registered with `atexit(3)`
+//   are not.
+// * The `QFATAL` pseudo-severity level is equivalent to `FATAL` but triggers
+//   quieter termination messages, e.g. without a full stack trace, and skips
+//   running registered error handlers.
+// * The `DFATAL` pseudo-severity level is defined as `FATAL` in debug mode and
+//   as `ERROR` otherwise.
+// Some preprocessor shenanigans are used to ensure that e.g. `LOG(INFO)` has
+// the same meaning even if a local symbol or preprocessor macro named `INFO` is
+// defined.  To specify a severity level using an expression instead of a
+// literal, use `LEVEL(expr)`.
+// Example:
+//
+//   LOG(LEVEL(stale ? absl::LogSeverity::kWarning : absl::LogSeverity::kInfo))
+//       << "Cookies are " << days << " days old";
+
+// `LOG` macros evaluate to an unterminated statement.  The value at the end of
+// the statement supports some chainable methods:
+//
+//   * .AtLocation(absl::string_view file, int line)
+//     .AtLocation(absl::SourceLocation loc)
+//     Overrides the location inferred from the callsite.  The string pointed to
+//     by `file` must be valid until the end of the statement.
+//   * .NoPrefix()
+//     Omits the prefix from this line.  The prefix includes metadata about the
+//     logged data such as source code location and timestamp.
+//   * .WithVerbosity(int verbose_level)
+//     Sets the verbosity field of the logged message as if it was logged by
+//     `VLOG(verbose_level)`.  Unlike `VLOG`, this method does not affect
+//     evaluation of the statement when the specified `verbose_level` has been
+//     disabled.  The only effect is on `LogSink` implementations which make use
+//     of the `absl::LogSink::verbosity()` value.  The value
+//     `absl::LogEntry::kNoVerbosityLevel` can be specified to mark the message
+//     not verbose.
+//   * .WithTimestamp(absl::Time timestamp)
+//     Uses the specified timestamp instead of one collected at the time of
+//     execution.
+//   * .WithThreadID(absl::LogEntry::tid_t tid)
+//     Uses the specified thread ID instead of one collected at the time of
+//     execution.
+//   * .WithMetadataFrom(const absl::LogEntry &entry)
+//     Copies all metadata (but no data) from the specified `absl::LogEntry`.
+//     This can be used to change the severity of a message, but it has some
+//     limitations:
+//     * `ABSL_MIN_LOG_LEVEL` is evaluated against the severity passed into
+//       `LOG` (or the implicit `FATAL` level of `CHECK`).
+//     * `LOG(FATAL)` and `CHECK` terminate the process unconditionally, even if
+//       the severity is changed later.
+//     `.WithMetadataFrom(entry)` should almost always be used in combination
+//     with `LOG(LEVEL(entry.log_severity()))`.
+//   * .WithPerror()
+//     Appends to the logged message a colon, a space, a textual description of
+//     the current value of `errno` (as by `strerror(3)`), and the numerical
+//     value of `errno`.
+//   * .ToSinkAlso(absl::LogSink* sink)
+//     Sends this message to `*sink` in addition to whatever other sinks it
+//     would otherwise have been sent to.  `sink` must not be null.
+//   * .ToSinkOnly(absl::LogSink* sink)
+//     Sends this message to `*sink` and no others.  `sink` must not be null.
+//
+// No interfaces in this header are async-signal-safe; their use in signal
+// handlers is unsupported and may deadlock your program or eat your lunch.
+//
+// Many logging statements are inherently conditional.  For example,
+// `LOG_IF(INFO, !foo)` does nothing if `foo` is true.  Even seemingly
+// unconditional statements like `LOG(INFO)` might be disabled at
+// compile-time to minimize binary size or for security reasons.
+//
+// * Except for the condition in a `CHECK` or `QCHECK` statement, programs must
+//   not rely on evaluation of expressions anywhere in logging statements for
+//   correctness.  For example, this is ok:
+//
+//     CHECK((fp = fopen("config.ini", "r")) != nullptr);
+//
+//   But this is probably not ok:
+//
+//     LOG(INFO) << "Server status: " << StartServerAndReturnStatusString();
+//
+//   The example below is bad too; the `i++` in the `LOG_IF` condition might
+//   not be evaluated, resulting in an infinite loop:
+//
+//     for (int i = 0; i < 1000000;)
+//       LOG_IF(INFO, i++ % 1000 == 0) << "Still working...";
+//
+// * Except where otherwise noted, conditions which cause a statement not to log
+//   also cause expressions not to be evaluated.  Programs may rely on this for
+//   performance reasons, e.g. by streaming the result of an expensive function
+//   call into a `DLOG` or `LOG_EVERY_N` statement.
+// * Care has been taken to ensure that expressions are parsed by the compiler
+//   even if they are never evaluated.  This means that syntax errors will be
+//   caught and variables will be considered used for the purposes of
+//   unused-variable diagnostics.  For example, this statement won't compile
+//   even if `INFO`-level logging has been compiled out:
+//
+//     int number_of_cakes = 40;
+//     LOG(INFO) << "Number of cakes: " << number_of_cake;  // Note the typo!
+//
+//   Similarly, this won't produce unused-variable compiler diagnostics even
+//   if `INFO`-level logging is compiled out:
+//
+//     {
+//       char fox_line1[] = "Hatee-hatee-hatee-ho!";
+//       LOG_IF(ERROR, false) << "The fox says " << fox_line1;
+//       char fox_line2[] = "A-oo-oo-oo-ooo!";
+//       LOG(INFO) << "The fox also says " << fox_line2;
+//     }
+//
+//   This error-checking is not perfect; for example, symbols that have been
+//   declared but not defined may not produce link errors if used in logging
+//   statements that compile away.
+//
+// Expressions streamed into these macros are formatted using `operator<<` just
+// as they would be if streamed into a `std::ostream`, however it should be
+// noted that their actual type is unspecified.
+//
+// To implement a custom formatting operator for a type you own, there are two
+// options: `AbslStringify()` or `std::ostream& operator<<(std::ostream&, ...)`.
+// It is recommended that users make their types loggable through
+// `AbslStringify()` as it is a universal stringification extension that also
+// enables `absl::StrFormat` and `absl::StrCat` support. If both
+// `AbslStringify()` and `std::ostream& operator<<(std::ostream&, ...)` are
+// defined, `AbslStringify()` will be used.
+//
+// To use the `AbslStringify()` API, define a friend function template in your
+// type's namespace with the following signature:
+//
+//   template <typename Sink>
+//   void AbslStringify(Sink& sink, const UserDefinedType& value);
+//
+// `Sink` has the same interface as `absl::FormatSink`, but without
+// `PutPaddedString()`.
+//
+// Example:
+//
+//   struct Point {
+//     template <typename Sink>
+//     friend void AbslStringify(Sink& sink, const Point& p) {
+//       absl::Format(&sink, "(%v, %v)", p.x, p.y);
+//     }
+//
+//     int x;
+//     int y;
+//   };
+//
+// To use `std::ostream& operator<<(std::ostream&, ...)`, define
+// `std::ostream& operator<<(std::ostream&, ...)` in your type's namespace (for
+// ADL) just as you would to stream it to `std::cout`.
+//
+// Currently `AbslStringify()` ignores output manipulators but this is not
+// guaranteed behavior and may be subject to change in the future. If you would
+// like guaranteed behavior regarding output manipulators, please use
+// `std::ostream& operator<<(std::ostream&, ...)` to make custom types loggable
+// instead.
+//
+// Those macros that support streaming honor output manipulators and `fmtflag`
+// changes that output data (e.g. `std::ends`) or control formatting of data
+// (e.g. `std::hex` and `std::fixed`), however flushing such a stream is
+// ignored.  The message produced by a log statement is sent to registered
+// `absl::LogSink` instances at the end of the statement; those sinks are
+// responsible for their own flushing (e.g. to disk) semantics.
+//
+// Flag settings are not carried over from one `LOG` statement to the next; this
+// is a bit different than e.g. `std::cout`:
+//
+//   LOG(INFO) << std::hex << 0xdeadbeef;  // logs "0xdeadbeef"
+//   LOG(INFO) << 0xdeadbeef;              // logs "3735928559"
+
+#ifndef ABSL_LOG_LOG_H_
+#define ABSL_LOG_LOG_H_
+
+#include "absl/log/internal/log_impl.h"
+
+// LOG()
+//
+// `LOG` takes a single argument which is a severity level.  Data streamed in
+// comprise the logged message.
+// Example:
+//
+//   LOG(INFO) << "Found " << num_cookies << " cookies";
+#define LOG(severity) ABSL_LOG_INTERNAL_LOG_IMPL(_##severity)
+
+// PLOG()
+//
+// `PLOG` behaves like `LOG` except that a description of the current state of
+// `errno` is appended to the streamed message.
+#define PLOG(severity) ABSL_LOG_INTERNAL_PLOG_IMPL(_##severity)
+
+// DLOG()
+//
+// `DLOG` behaves like `LOG` in debug mode (i.e. `#ifndef NDEBUG`).  Otherwise
+// it compiles away and does nothing.  Note that `DLOG(FATAL)` does not
+// terminate the program if `NDEBUG` is defined.
+#define DLOG(severity) ABSL_LOG_INTERNAL_DLOG_IMPL(_##severity)
+
+// `VLOG` uses numeric levels to provide verbose logging that can configured at
+// runtime, including at a per-module level.  `VLOG` statements are logged at
+// `INFO` severity if they are logged at all; the numeric levels are on a
+// different scale than the proper severity levels.  Positive levels are
+// disabled by default.  Negative levels should not be used.
+// Example:
+//
+//   VLOG(1) << "I print when you run the program with --v=1 or higher";
+//   VLOG(2) << "I print when you run the program with --v=2 or higher";
+//
+// See vlog_is_on.h for further documentation, including the usage of the
+// --vmodule flag to log at different levels in different source files.
+//
+// `VLOG` does not produce any output when verbose logging is not enabled.
+// However, simply testing whether verbose logging is enabled can be expensive.
+// If you don't intend to enable verbose logging in non-debug builds, consider
+// using `DVLOG` instead.
+#define VLOG(severity) ABSL_LOG_INTERNAL_VLOG_IMPL(severity)
+
+// `DVLOG` behaves like `VLOG` in debug mode (i.e. `#ifndef NDEBUG`).
+// Otherwise, it compiles away and does nothing.
+#define DVLOG(severity) ABSL_LOG_INTERNAL_DVLOG_IMPL(severity)
+
+// `LOG_IF` and friends add a second argument which specifies a condition.  If
+// the condition is false, nothing is logged.
+// Example:
+//
+//   LOG_IF(INFO, num_cookies > 10) << "Got lots of cookies";
+//
+// There is no `VLOG_IF` because the order of evaluation of the arguments is
+// ambiguous and the alternate spelling with an `if`-statement is trivial.
+#define LOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_LOG_IF_IMPL(_##severity, condition)
+#define PLOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_PLOG_IF_IMPL(_##severity, condition)
+#define DLOG_IF(severity, condition) \
+  ABSL_LOG_INTERNAL_DLOG_IF_IMPL(_##severity, condition)
+
+// LOG_EVERY_N
+//
+// An instance of `LOG_EVERY_N` increments a hidden zero-initialized counter
+// every time execution passes through it and logs the specified message when
+// the counter's value is a multiple of `n`, doing nothing otherwise.  Each
+// instance has its own counter.  The counter's value can be logged by streaming
+// the symbol `COUNTER`.  `LOG_EVERY_N` is thread-safe.
+// Example:
+//
+//   LOG_EVERY_N(WARNING, 1000) << "Got a packet with a bad CRC (" << COUNTER
+//                              << " total)";
+#define LOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_N_IMPL(_##severity, n)
+
+// LOG_FIRST_N
+//
+// `LOG_FIRST_N` behaves like `LOG_EVERY_N` except that the specified message is
+// logged when the counter's value is less than `n`.  `LOG_FIRST_N` is
+// thread-safe.
+#define LOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_LOG_FIRST_N_IMPL(_##severity, n)
+
+// LOG_EVERY_POW_2
+//
+// `LOG_EVERY_POW_2` behaves like `LOG_EVERY_N` except that the specified
+// message is logged when the counter's value is a power of 2.
+// `LOG_EVERY_POW_2` is thread-safe.
+#define LOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_POW_2_IMPL(_##severity)
+
+// LOG_EVERY_N_SEC
+//
+// An instance of `LOG_EVERY_N_SEC` uses a hidden state variable to log the
+// specified message at most once every `n_seconds`.  A hidden counter of
+// executions (whether a message is logged or not) is also maintained and can be
+// logged by streaming the symbol `COUNTER`.  `LOG_EVERY_N_SEC` is thread-safe.
+// Example:
+//
+//   LOG_EVERY_N_SEC(INFO, 2.5) << "Got " << COUNTER << " cookies so far";
+#define LOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_LOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define PLOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_N_IMPL(_##severity, n)
+#define PLOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_PLOG_FIRST_N_IMPL(_##severity, n)
+#define PLOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_POW_2_IMPL(_##severity)
+#define PLOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_PLOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define DLOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_N_IMPL(_##severity, n)
+#define DLOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_DLOG_FIRST_N_IMPL(_##severity, n)
+#define DLOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_POW_2_IMPL(_##severity)
+#define DLOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_DLOG_EVERY_N_SEC_IMPL(_##severity, n_seconds)
+
+#define VLOG_EVERY_N(severity, n) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_N_IMPL(severity, n)
+#define VLOG_FIRST_N(severity, n) \
+  ABSL_LOG_INTERNAL_VLOG_FIRST_N_IMPL(severity, n)
+#define VLOG_EVERY_POW_2(severity) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_POW_2_IMPL(severity)
+#define VLOG_EVERY_N_SEC(severity, n_seconds) \
+  ABSL_LOG_INTERNAL_VLOG_EVERY_N_SEC_IMPL(severity, n_seconds)
+
+// `LOG_IF_EVERY_N` and friends behave as the corresponding `LOG_EVERY_N`
+// but neither increment a counter nor log a message if condition is false (as
+// `LOG_IF`).
+// Example:
+//
+//   LOG_IF_EVERY_N(INFO, (size > 1024), 10) << "Got the " << COUNTER
+//                                           << "th big cookie";
+#define LOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define LOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_LOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define LOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define LOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_LOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#define PLOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define PLOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_PLOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define PLOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define PLOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_PLOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#define DLOG_IF_EVERY_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_IMPL(_##severity, condition, n)
+#define DLOG_IF_FIRST_N(severity, condition, n) \
+  ABSL_LOG_INTERNAL_DLOG_IF_FIRST_N_IMPL(_##severity, condition, n)
+#define DLOG_IF_EVERY_POW_2(severity, condition) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_POW_2_IMPL(_##severity, condition)
+#define DLOG_IF_EVERY_N_SEC(severity, condition, n_seconds) \
+  ABSL_LOG_INTERNAL_DLOG_IF_EVERY_N_SEC_IMPL(_##severity, condition, n_seconds)
+
+#endif  // ABSL_LOG_LOG_H_

Pods/abseil/absl/log/log_entry.cc

@@ -0,0 +1,41 @@
+//
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_entry.h"
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+#ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
+constexpr int LogEntry::kNoVerbosityLevel;
+constexpr int LogEntry::kNoVerboseLevel;
+#endif
+
+// https://github.com/abseil/abseil-cpp/issues/1465
+// CMake builds on Apple platforms error when libraries are empty.
+// Our CMake configuration can avoid this error on header-only libraries,
+// but since this library is conditionally empty, including a single
+// variable is an easy workaround.
+#ifdef __APPLE__
+namespace log_internal {
+extern const char kAvoidEmptyLogEntryLibraryWarning;
+const char kAvoidEmptyLogEntryLibraryWarning = 0;
+}  // namespace log_internal
+#endif  // __APPLE__
+
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/log_entry.h

@@ -0,0 +1,221 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_entry.h
+// -----------------------------------------------------------------------------
+//
+// This header declares `class absl::LogEntry`, which represents a log record as
+// passed to `LogSink::Send`. Data returned by pointer or by reference or by
+// `absl::string_view` must be copied if they are needed after the lifetime of
+// the `absl::LogEntry`.
+
+#ifndef ABSL_LOG_LOG_ENTRY_H_
+#define ABSL_LOG_LOG_ENTRY_H_
+
+#include <cstddef>
+#include <string>
+
+#include "absl/base/attributes.h"
+#include "absl/base/config.h"
+#include "absl/base/log_severity.h"
+#include "absl/log/internal/config.h"
+#include "absl/strings/string_view.h"
+#include "absl/time/time.h"
+#include "absl/types/span.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+namespace log_internal {
+// Test only friend.
+class LogEntryTestPeer;
+class LogMessage;
+}  // namespace log_internal
+
+// LogEntry
+//
+// Represents a single entry in a log, i.e., one `LOG` statement or failed
+// `CHECK`.
+//
+// `LogEntry` is thread-compatible.
+class LogEntry final {
+ public:
+  using tid_t = log_internal::Tid;
+
+  // For non-verbose log entries, `verbosity()` returns `kNoVerbosityLevel`.
+  static constexpr int kNoVerbosityLevel = -1;
+  static constexpr int kNoVerboseLevel = -1;  // TO BE removed
+
+  // Pass `LogEntry` by reference, and do not store it as its state does not
+  // outlive the call to `LogSink::Send()`.
+  LogEntry(const LogEntry&) = delete;
+  LogEntry& operator=(const LogEntry&) = delete;
+
+  // Source file and line where the log message occurred.  Taken from `__FILE__`
+  // and `__LINE__` unless overridden by `LOG(...).AtLocation(...)`.
+  //
+  // Take special care not to use the values returned by `source_filename()` and
+  // `source_basename()` after the lifetime of the entry.  This is always
+  // incorrect, but it will often work in practice because they usually point
+  // into a statically allocated character array obtained from `__FILE__`.
+  // Statements like `LOG(INFO).AtLocation(std::string(...), ...)` will expose
+  // the bug.  If you need the data later, you must copy them.
+  absl::string_view source_filename() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return full_filename_;
+  }
+  absl::string_view source_basename() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return base_filename_;
+  }
+  int source_line() const { return line_; }
+
+  // LogEntry::prefix()
+  //
+  // True unless the metadata prefix was suppressed once by
+  // `LOG(...).NoPrefix()` or globally by `absl::EnableLogPrefix(false)`.
+  // Implies `text_message_with_prefix() == text_message()`.
+  bool prefix() const { return prefix_; }
+
+  // LogEntry::log_severity()
+  //
+  // Returns this entry's severity.  For `LOG`, taken from the first argument;
+  // for `CHECK`, always `absl::LogSeverity::kFatal`.
+  absl::LogSeverity log_severity() const { return severity_; }
+
+  // LogEntry::verbosity()
+  //
+  // Returns this entry's verbosity, or `kNoVerbosityLevel` for a non-verbose
+  // entry. Taken from the argument to `VLOG` or from
+  // `LOG(...).WithVerbosity(...)`.
+  int verbosity() const { return verbose_level_; }
+
+  // LogEntry::timestamp()
+  //
+  // Returns the time at which this entry was written.  Captured during
+  // evaluation of `LOG`, but can be overridden by
+  // `LOG(...).WithTimestamp(...)`.
+  //
+  // Take care not to rely on timestamps increasing monotonically, or even to
+  // rely on timestamps having any particular relationship with reality (since
+  // they can be overridden).
+  absl::Time timestamp() const { return timestamp_; }
+
+  // LogEntry::tid()
+  //
+  // Returns the ID of the thread that wrote this entry.  Captured during
+  // evaluation of `LOG`, but can be overridden by `LOG(...).WithThreadID(...)`.
+  //
+  // Take care not to *rely* on reported thread IDs as they can be overridden as
+  // specified above.
+  tid_t tid() const { return tid_; }
+
+  // Text-formatted version of the log message.  An underlying buffer holds
+  // these contiguous data:
+  //
+  // * A prefix formed by formatting metadata (timestamp, filename, line number,
+  //   etc.)
+  //   The prefix may be empty - see `LogEntry::prefix()` - and may rarely be
+  //   truncated if the metadata are very long.
+  // * The streamed data
+  //   The data may be empty if nothing was streamed, or may be truncated to fit
+  //   the buffer.
+  // * A newline
+  // * A nul terminator
+  //
+  // The newline and nul terminator will be present even if the prefix and/or
+  // data are truncated.
+  //
+  // These methods give access to the most commonly useful substrings of the
+  // buffer's contents.  Other combinations can be obtained with substring
+  // arithmetic.
+  //
+  // The buffer does not outlive the entry; if you need the data later, you must
+  // copy them.
+  absl::string_view text_message_with_prefix_and_newline() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data(),
+        text_message_with_prefix_and_newline_and_nul_.size() - 1);
+  }
+  absl::string_view text_message_with_prefix() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data(),
+        text_message_with_prefix_and_newline_and_nul_.size() - 2);
+  }
+  absl::string_view text_message_with_newline() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data() + prefix_len_,
+        text_message_with_prefix_and_newline_and_nul_.size() - prefix_len_ - 1);
+  }
+  absl::string_view text_message() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return absl::string_view(
+        text_message_with_prefix_and_newline_and_nul_.data() + prefix_len_,
+        text_message_with_prefix_and_newline_and_nul_.size() - prefix_len_ - 2);
+  }
+  const char* text_message_with_prefix_and_newline_c_str() const
+      ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return text_message_with_prefix_and_newline_and_nul_.data();
+  }
+
+  // Returns a serialized protobuf holding the operands streamed into this
+  // log message.  The message definition is not yet published.
+  //
+  // The buffer does not outlive the entry; if you need the data later, you must
+  // copy them.
+  absl::string_view encoded_message() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return encoding_;
+  }
+
+  // LogEntry::stacktrace()
+  //
+  // Optional stacktrace, e.g. for `FATAL` logs and failed `CHECK`s.
+  //
+  // Fatal entries are dispatched to each sink twice: first with all data and
+  // metadata but no stacktrace, and then with the stacktrace.  This is done
+  // because stacktrace collection is sometimes slow and fallible, and it's
+  // critical to log enough information to diagnose the failure even if the
+  // stacktrace collection hangs.
+  //
+  // The buffer does not outlive the entry; if you need the data later, you must
+  // copy them.
+  absl::string_view stacktrace() const ABSL_ATTRIBUTE_LIFETIME_BOUND {
+    return stacktrace_;
+  }
+
+ private:
+  LogEntry() = default;
+
+  absl::string_view full_filename_;
+  absl::string_view base_filename_;
+  int line_;
+  bool prefix_;
+  absl::LogSeverity severity_;
+  int verbose_level_;  // >=0 for `VLOG`, etc.; otherwise `kNoVerbosityLevel`.
+  absl::Time timestamp_;
+  tid_t tid_;
+  absl::Span<const char> text_message_with_prefix_and_newline_and_nul_;
+  size_t prefix_len_;
+  absl::string_view encoding_;
+  std::string stacktrace_;
+
+  friend class log_internal::LogEntryTestPeer;
+  friend class log_internal::LogMessage;
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_ENTRY_H_

Pods/abseil/absl/log/log_sink.cc

@@ -0,0 +1,23 @@
+// Copyright 2022 The Abseil Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "absl/log/log_sink.h"
+
+#include "absl/base/config.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+void LogSink::KeyFunction() const {}
+ABSL_NAMESPACE_END
+}  // namespace absl

Pods/abseil/absl/log/log_sink.h

@@ -0,0 +1,71 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_sink.h
+// -----------------------------------------------------------------------------
+//
+// This header declares the interface class `absl::LogSink`.
+
+#ifndef ABSL_LOG_LOG_SINK_H_
+#define ABSL_LOG_LOG_SINK_H_
+
+#include "absl/base/config.h"
+#include "absl/log/log_entry.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// absl::LogSink
+//
+// `absl::LogSink` is an interface which can be extended to intercept and
+// process particular messages (with `LOG.ToSinkOnly()` or
+// `LOG.ToSinkAlso()`) or all messages (if registered with
+// `absl::AddLogSink`).  Implementations must not take any locks that might be
+// held by the `LOG` caller.
+class LogSink {
+ public:
+  virtual ~LogSink() = default;
+
+  // LogSink::Send()
+  //
+  // `Send` is called synchronously during the log statement.  `Send` must be
+  // thread-safe.
+  //
+  // It is safe to use `LOG` within an implementation of `Send`.  `ToSinkOnly`
+  // and `ToSinkAlso` are safe in general but can be used to create an infinite
+  // loop if you try.
+  virtual void Send(const absl::LogEntry& entry) = 0;
+
+  // LogSink::Flush()
+  //
+  // Sinks that buffer messages should override this method to flush the buffer
+  // and return.  `Flush` must be thread-safe.
+  virtual void Flush() {}
+
+ protected:
+  LogSink() = default;
+  // Implementations may be copyable and/or movable.
+  LogSink(const LogSink&) = default;
+  LogSink& operator=(const LogSink&) = default;
+
+ private:
+  // https://lld.llvm.org/missingkeyfunction.html#missing-key-function
+  virtual void KeyFunction() const final;  // NOLINT(readability/inheritance)
+};
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_SINK_H_

Pods/abseil/absl/log/log_sink_registry.h

@@ -0,0 +1,61 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/log_sink_registry.h
+// -----------------------------------------------------------------------------
+//
+// This header declares APIs to operate on global set of registered log sinks.
+
+#ifndef ABSL_LOG_LOG_SINK_REGISTRY_H_
+#define ABSL_LOG_LOG_SINK_REGISTRY_H_
+
+#include "absl/base/config.h"
+#include "absl/log/internal/log_sink_set.h"
+#include "absl/log/log_sink.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+
+// AddLogSink(), RemoveLogSink()
+//
+// Adds or removes a `absl::LogSink` as a consumer of logging data.
+//
+// These functions are thread-safe.
+//
+// It is an error to attempt to add a sink that's already registered or to
+// attempt to remove one that isn't.
+//
+// To avoid unbounded recursion, dispatch to registered `absl::LogSink`s is
+// disabled per-thread while running the `Send()` method of registered
+// `absl::LogSink`s.  Affected messages are dispatched to a special internal
+// sink instead which writes them to `stderr`.
+//
+// Do not call these inside `absl::LogSink::Send`.
+inline void AddLogSink(absl::LogSink* sink) { log_internal::AddLogSink(sink); }
+inline void RemoveLogSink(absl::LogSink* sink) {
+  log_internal::RemoveLogSink(sink);
+}
+
+// FlushLogSinks()
+//
+// Calls `absl::LogSink::Flush` on all registered sinks.
+//
+// Do not call this inside `absl::LogSink::Send`.
+inline void FlushLogSinks() { log_internal::FlushLogSinks(); }
+
+ABSL_NAMESPACE_END
+}  // namespace absl
+
+#endif  // ABSL_LOG_LOG_SINK_REGISTRY_H_

Pods/abseil/absl/log/vlog_is_on.h

@@ -0,0 +1,72 @@
+// Copyright 2022 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// -----------------------------------------------------------------------------
+// File: log/vlog_is_on.h
+// -----------------------------------------------------------------------------
+//
+// This header defines the `VLOG_IS_ON()` macro that controls the
+// variable-verbosity conditional logging.
+//
+// It's used by `VLOG` in log.h, or it can also be used directly like this:
+//
+//   if (VLOG_IS_ON(2)) {
+//     foo_server.RecomputeStatisticsExpensive();
+//     LOG(INFO) << foo_server.LastStatisticsAsString();
+//   }
+//
+// Each source file has an effective verbosity level that's a non-negative
+// integer computed from the `--vmodule` and `--v` flags.
+// `VLOG_IS_ON(n)` is true, and `VLOG(n)` logs, if that effective verbosity
+// level is greater than or equal to `n`.
+//
+// `--vmodule` takes a comma-delimited list of key=value pairs.  Each key is a
+// pattern matched against filenames, and the values give the effective severity
+// level applied to matching files.  '?' and '*' characters in patterns are
+// interpreted as single-character and zero-or-more-character wildcards.
+// Patterns including a slash character are matched against full pathnames,
+// while those without are matched against basenames only.  One suffix (i.e. the
+// last . and everything after it) is stripped from each filename prior to
+// matching, as is the special suffix "-inl".
+//
+// Files are matched against globs in `--vmodule` in order, and the first match
+// determines the verbosity level.
+//
+// Files which do not match any pattern in `--vmodule` use the value of `--v` as
+// their effective verbosity level.  The default is 0.
+//
+// SetVLogLevel helper function is provided to do limited dynamic control over
+// V-logging by appending to `--vmodule`. Because these go at the beginning of
+// the list, they take priority over any globs previously added.
+//
+// Resetting --vmodule will override all previous modifications to `--vmodule`,
+// including via SetVLogLevel.
+
+#ifndef ABSL_LOG_VLOG_IS_ON_H_
+#define ABSL_LOG_VLOG_IS_ON_H_
+
+#include "absl/log/absl_vlog_is_on.h"  // IWYU pragma: export
+
+// IWYU pragma: private, include "absl/log/log.h"
+
+// Each VLOG_IS_ON call site gets its own VLogSite that registers with the
+// global linked list of sites to asynchronously update its verbosity level on
+// changes to --v or --vmodule. The verbosity can also be set by manually
+// calling SetVLogLevel.
+//
+// VLOG_IS_ON is not async signal safe, but it is guaranteed not to allocate
+// new memory.
+#define VLOG_IS_ON(verbose_level) ABSL_VLOG_IS_ON(verbose_level)
+
+#endif  // ABSL_LOG_VLOG_IS_ON_H_