chromium/third_party/protobuf/src/google/protobuf/arenastring.cc

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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#include <google/protobuf/arenastring.h>

#include <cstddef>
#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/stubs/mutex.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/message_lite.h>
#include <google/protobuf/parse_context.h>
#include <google/protobuf/stubs/stl_util.h>

// clang-format off
#include <google/protobuf/port_def.inc>
// clang-format on

namespace google {
namespace protobuf {
namespace internal {

namespace  {

// TaggedStringPtr::Flags uses the lower 2 bits as tags.
// Enforce that allocated data aligns to at least 4 bytes, and that
// the alignment of the global const string value does as well.
// The alignment guaranteed by `new std::string` depends on both:
// - new align = __STDCPP_DEFAULT_NEW_ALIGNMENT__ / max_align_t
// - alignof(std::string)
#ifdef __STDCPP_DEFAULT_NEW_ALIGNMENT__
constexpr size_t kNewAlign = …;
#elif (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) < 40900
constexpr size_t kNewAlign = alignof(::max_align_t);
#else
constexpr size_t kNewAlign = alignof(std::max_align_t);
#endif
constexpr size_t kStringAlign = …;

static_assert …;
static_assert …;

}  // namespace

const std::string& LazyString::Init() const { … }

namespace {


#if defined(NDEBUG) || !GOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL

class ScopedCheckPtrInvariants { … };

#endif  // NDEBUG || !GOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL

// Creates a heap allocated std::string value.
inline TaggedStringPtr CreateString(ConstStringParam value) { … }

#if !GOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL

// Creates an arena allocated std::string value.
TaggedStringPtr CreateArenaString(Arena& arena, ConstStringParam s) { … }

#endif  // !GOOGLE_PROTOBUF_INTERNAL_DONATE_STEAL

}  // namespace

void ArenaStringPtr::Set(ConstStringParam value, Arena* arena) { … }

void ArenaStringPtr::Set(std::string&& value, Arena* arena) { … }

std::string* ArenaStringPtr::Mutable(Arena* arena) { … }

std::string* ArenaStringPtr::Mutable(const LazyString& default_value,
                                     Arena* arena) { … }

std::string* ArenaStringPtr::MutableNoCopy(Arena* arena) { … }

template <typename... Lazy>
std::string* ArenaStringPtr::MutableSlow(::google::protobuf::Arena* arena,
                                         const Lazy&... lazy_default) { … }

std::string* ArenaStringPtr::Release() { … }

void ArenaStringPtr::SetAllocated(std::string* value, Arena* arena) { … }

void ArenaStringPtr::Destroy() { … }

void ArenaStringPtr::ClearToEmpty() { … }

void ArenaStringPtr::ClearToDefault(const LazyString& default_value,
                                    ::google::protobuf::Arena* arena) { … }

const char* EpsCopyInputStream::ReadArenaString(const char* ptr,
                                                ArenaStringPtr* s,
                                                Arena* arena) { … }

}  // namespace internal
}  // namespace protobuf
}  // namespace google

#include <google/protobuf/port_undef.inc>