forked from protocolbuffers/protobuf
/
wire_format.cc
1761 lines (1578 loc) · 67.2 KB
/
wire_format.cc
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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Author: kenton@google.com (Kenton Varda)
// Based on original Protocol Buffers design by
// Sanjay Ghemawat, Jeff Dean, and others.
#include <google/protobuf/wire_format.h>
#include <stack>
#include <string>
#include <vector>
#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/stringprintf.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/parse_context.h>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/io/zero_copy_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/dynamic_message.h>
#include <google/protobuf/map_field.h>
#include <google/protobuf/map_field_inl.h>
#include <google/protobuf/message.h>
#include <google/protobuf/message_lite.h>
#include <google/protobuf/unknown_field_set.h>
#include <google/protobuf/port_def.inc>
const size_t kMapEntryTagByteSize = 2;
namespace google {
namespace protobuf {
namespace internal {
// Forward declare static functions
static size_t MapValueRefDataOnlyByteSize(const FieldDescriptor* field,
const MapValueConstRef& value);
// ===================================================================
bool UnknownFieldSetFieldSkipper::SkipField(io::CodedInputStream* input,
uint32_t tag) {
return WireFormat::SkipField(input, tag, unknown_fields_);
}
bool UnknownFieldSetFieldSkipper::SkipMessage(io::CodedInputStream* input) {
return WireFormat::SkipMessage(input, unknown_fields_);
}
void UnknownFieldSetFieldSkipper::SkipUnknownEnum(int field_number, int value) {
unknown_fields_->AddVarint(field_number, value);
}
bool WireFormat::SkipField(io::CodedInputStream* input, uint32_t tag,
UnknownFieldSet* unknown_fields) {
int number = WireFormatLite::GetTagFieldNumber(tag);
// Field number 0 is illegal.
if (number == 0) return false;
switch (WireFormatLite::GetTagWireType(tag)) {
case WireFormatLite::WIRETYPE_VARINT: {
uint64_t value;
if (!input->ReadVarint64(&value)) return false;
if (unknown_fields != nullptr) unknown_fields->AddVarint(number, value);
return true;
}
case WireFormatLite::WIRETYPE_FIXED64: {
uint64_t value;
if (!input->ReadLittleEndian64(&value)) return false;
if (unknown_fields != nullptr) unknown_fields->AddFixed64(number, value);
return true;
}
case WireFormatLite::WIRETYPE_LENGTH_DELIMITED: {
uint32_t length;
if (!input->ReadVarint32(&length)) return false;
if (unknown_fields == nullptr) {
if (!input->Skip(length)) return false;
} else {
if (!input->ReadString(unknown_fields->AddLengthDelimited(number),
length)) {
return false;
}
}
return true;
}
case WireFormatLite::WIRETYPE_START_GROUP: {
if (!input->IncrementRecursionDepth()) return false;
if (!SkipMessage(input, (unknown_fields == nullptr)
? nullptr
: unknown_fields->AddGroup(number))) {
return false;
}
input->DecrementRecursionDepth();
// Check that the ending tag matched the starting tag.
if (!input->LastTagWas(
WireFormatLite::MakeTag(WireFormatLite::GetTagFieldNumber(tag),
WireFormatLite::WIRETYPE_END_GROUP))) {
return false;
}
return true;
}
case WireFormatLite::WIRETYPE_END_GROUP: {
return false;
}
case WireFormatLite::WIRETYPE_FIXED32: {
uint32_t value;
if (!input->ReadLittleEndian32(&value)) return false;
if (unknown_fields != nullptr) unknown_fields->AddFixed32(number, value);
return true;
}
default: {
return false;
}
}
}
bool WireFormat::SkipMessage(io::CodedInputStream* input,
UnknownFieldSet* unknown_fields) {
while (true) {
uint32_t tag = input->ReadTag();
if (tag == 0) {
// End of input. This is a valid place to end, so return true.
return true;
}
WireFormatLite::WireType wire_type = WireFormatLite::GetTagWireType(tag);
if (wire_type == WireFormatLite::WIRETYPE_END_GROUP) {
// Must be the end of the message.
return true;
}
if (!SkipField(input, tag, unknown_fields)) return false;
}
}
bool WireFormat::ReadPackedEnumPreserveUnknowns(io::CodedInputStream* input,
uint32_t field_number,
bool (*is_valid)(int),
UnknownFieldSet* unknown_fields,
RepeatedField<int>* values) {
uint32_t length;
if (!input->ReadVarint32(&length)) return false;
io::CodedInputStream::Limit limit = input->PushLimit(length);
while (input->BytesUntilLimit() > 0) {
int value;
if (!WireFormatLite::ReadPrimitive<int, WireFormatLite::TYPE_ENUM>(
input, &value)) {
return false;
}
if (is_valid == nullptr || is_valid(value)) {
values->Add(value);
} else {
unknown_fields->AddVarint(field_number, value);
}
}
input->PopLimit(limit);
return true;
}
uint8_t* WireFormat::InternalSerializeUnknownFieldsToArray(
const UnknownFieldSet& unknown_fields, uint8_t* target,
io::EpsCopyOutputStream* stream) {
for (int i = 0; i < unknown_fields.field_count(); i++) {
const UnknownField& field = unknown_fields.field(i);
target = stream->EnsureSpace(target);
switch (field.type()) {
case UnknownField::TYPE_VARINT:
target = WireFormatLite::WriteUInt64ToArray(field.number(),
field.varint(), target);
break;
case UnknownField::TYPE_FIXED32:
target = WireFormatLite::WriteFixed32ToArray(field.number(),
field.fixed32(), target);
break;
case UnknownField::TYPE_FIXED64:
target = WireFormatLite::WriteFixed64ToArray(field.number(),
field.fixed64(), target);
break;
case UnknownField::TYPE_LENGTH_DELIMITED:
target = stream->WriteString(field.number(), field.length_delimited(),
target);
break;
case UnknownField::TYPE_GROUP:
target = WireFormatLite::WriteTagToArray(
field.number(), WireFormatLite::WIRETYPE_START_GROUP, target);
target = InternalSerializeUnknownFieldsToArray(field.group(), target,
stream);
target = stream->EnsureSpace(target);
target = WireFormatLite::WriteTagToArray(
field.number(), WireFormatLite::WIRETYPE_END_GROUP, target);
break;
}
}
return target;
}
uint8_t* WireFormat::InternalSerializeUnknownMessageSetItemsToArray(
const UnknownFieldSet& unknown_fields, uint8_t* target,
io::EpsCopyOutputStream* stream) {
for (int i = 0; i < unknown_fields.field_count(); i++) {
const UnknownField& field = unknown_fields.field(i);
// The only unknown fields that are allowed to exist in a MessageSet are
// messages, which are length-delimited.
if (field.type() == UnknownField::TYPE_LENGTH_DELIMITED) {
target = stream->EnsureSpace(target);
// Start group.
target = io::CodedOutputStream::WriteTagToArray(
WireFormatLite::kMessageSetItemStartTag, target);
// Write type ID.
target = io::CodedOutputStream::WriteTagToArray(
WireFormatLite::kMessageSetTypeIdTag, target);
target =
io::CodedOutputStream::WriteVarint32ToArray(field.number(), target);
// Write message.
target = io::CodedOutputStream::WriteTagToArray(
WireFormatLite::kMessageSetMessageTag, target);
target = field.InternalSerializeLengthDelimitedNoTag(target, stream);
target = stream->EnsureSpace(target);
// End group.
target = io::CodedOutputStream::WriteTagToArray(
WireFormatLite::kMessageSetItemEndTag, target);
}
}
return target;
}
size_t WireFormat::ComputeUnknownFieldsSize(
const UnknownFieldSet& unknown_fields) {
size_t size = 0;
for (int i = 0; i < unknown_fields.field_count(); i++) {
const UnknownField& field = unknown_fields.field(i);
switch (field.type()) {
case UnknownField::TYPE_VARINT:
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_VARINT));
size += io::CodedOutputStream::VarintSize64(field.varint());
break;
case UnknownField::TYPE_FIXED32:
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_FIXED32));
size += sizeof(int32_t);
break;
case UnknownField::TYPE_FIXED64:
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_FIXED64));
size += sizeof(int64_t);
break;
case UnknownField::TYPE_LENGTH_DELIMITED:
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_LENGTH_DELIMITED));
size += io::CodedOutputStream::VarintSize32(
field.length_delimited().size());
size += field.length_delimited().size();
break;
case UnknownField::TYPE_GROUP:
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_START_GROUP));
size += ComputeUnknownFieldsSize(field.group());
size += io::CodedOutputStream::VarintSize32(WireFormatLite::MakeTag(
field.number(), WireFormatLite::WIRETYPE_END_GROUP));
break;
}
}
return size;
}
size_t WireFormat::ComputeUnknownMessageSetItemsSize(
const UnknownFieldSet& unknown_fields) {
size_t size = 0;
for (int i = 0; i < unknown_fields.field_count(); i++) {
const UnknownField& field = unknown_fields.field(i);
// The only unknown fields that are allowed to exist in a MessageSet are
// messages, which are length-delimited.
if (field.type() == UnknownField::TYPE_LENGTH_DELIMITED) {
size += WireFormatLite::kMessageSetItemTagsSize;
size += io::CodedOutputStream::VarintSize32(field.number());
int field_size = field.GetLengthDelimitedSize();
size += io::CodedOutputStream::VarintSize32(field_size);
size += field_size;
}
}
return size;
}
// ===================================================================
bool WireFormat::ParseAndMergePartial(io::CodedInputStream* input,
Message* message) {
const Descriptor* descriptor = message->GetDescriptor();
const Reflection* message_reflection = message->GetReflection();
while (true) {
uint32_t tag = input->ReadTag();
if (tag == 0) {
// End of input. This is a valid place to end, so return true.
return true;
}
if (WireFormatLite::GetTagWireType(tag) ==
WireFormatLite::WIRETYPE_END_GROUP) {
// Must be the end of the message.
return true;
}
const FieldDescriptor* field = nullptr;
if (descriptor != nullptr) {
int field_number = WireFormatLite::GetTagFieldNumber(tag);
field = descriptor->FindFieldByNumber(field_number);
// If that failed, check if the field is an extension.
if (field == nullptr && descriptor->IsExtensionNumber(field_number)) {
if (input->GetExtensionPool() == nullptr) {
field = message_reflection->FindKnownExtensionByNumber(field_number);
} else {
field = input->GetExtensionPool()->FindExtensionByNumber(
descriptor, field_number);
}
}
// If that failed, but we're a MessageSet, and this is the tag for a
// MessageSet item, then parse that.
if (field == nullptr && descriptor->options().message_set_wire_format() &&
tag == WireFormatLite::kMessageSetItemStartTag) {
if (!ParseAndMergeMessageSetItem(input, message)) {
return false;
}
continue; // Skip ParseAndMergeField(); already taken care of.
}
}
if (!ParseAndMergeField(tag, field, message, input)) {
return false;
}
}
}
bool WireFormat::SkipMessageSetField(io::CodedInputStream* input,
uint32_t field_number,
UnknownFieldSet* unknown_fields) {
uint32_t length;
if (!input->ReadVarint32(&length)) return false;
return input->ReadString(unknown_fields->AddLengthDelimited(field_number),
length);
}
bool WireFormat::ParseAndMergeMessageSetField(uint32_t field_number,
const FieldDescriptor* field,
Message* message,
io::CodedInputStream* input) {
const Reflection* message_reflection = message->GetReflection();
if (field == nullptr) {
// We store unknown MessageSet extensions as groups.
return SkipMessageSetField(
input, field_number, message_reflection->MutableUnknownFields(message));
} else if (field->is_repeated() ||
field->type() != FieldDescriptor::TYPE_MESSAGE) {
// This shouldn't happen as we only allow optional message extensions to
// MessageSet.
GOOGLE_LOG(ERROR) << "Extensions of MessageSets must be optional messages.";
return false;
} else {
Message* sub_message = message_reflection->MutableMessage(
message, field, input->GetExtensionFactory());
return WireFormatLite::ReadMessage(input, sub_message);
}
}
static bool StrictUtf8Check(const FieldDescriptor* field) {
return field->file()->syntax() == FileDescriptor::SYNTAX_PROTO3;
}
bool WireFormat::ParseAndMergeField(
uint32_t tag,
const FieldDescriptor* field, // May be nullptr for unknown
Message* message, io::CodedInputStream* input) {
const Reflection* message_reflection = message->GetReflection();
enum { UNKNOWN, NORMAL_FORMAT, PACKED_FORMAT } value_format;
if (field == nullptr) {
value_format = UNKNOWN;
} else if (WireFormatLite::GetTagWireType(tag) ==
WireTypeForFieldType(field->type())) {
value_format = NORMAL_FORMAT;
} else if (field->is_packable() &&
WireFormatLite::GetTagWireType(tag) ==
WireFormatLite::WIRETYPE_LENGTH_DELIMITED) {
value_format = PACKED_FORMAT;
} else {
// We don't recognize this field. Either the field number is unknown
// or the wire type doesn't match. Put it in our unknown field set.
value_format = UNKNOWN;
}
if (value_format == UNKNOWN) {
return SkipField(input, tag,
message_reflection->MutableUnknownFields(message));
} else if (value_format == PACKED_FORMAT) {
uint32_t length;
if (!input->ReadVarint32(&length)) return false;
io::CodedInputStream::Limit limit = input->PushLimit(length);
switch (field->type()) {
#define HANDLE_PACKED_TYPE(TYPE, CPPTYPE, CPPTYPE_METHOD) \
case FieldDescriptor::TYPE_##TYPE: { \
while (input->BytesUntilLimit() > 0) { \
CPPTYPE value; \
if (!WireFormatLite::ReadPrimitive<CPPTYPE, \
WireFormatLite::TYPE_##TYPE>(input, \
&value)) \
return false; \
message_reflection->Add##CPPTYPE_METHOD(message, field, value); \
} \
break; \
}
HANDLE_PACKED_TYPE(INT32, int32_t, Int32)
HANDLE_PACKED_TYPE(INT64, int64_t, Int64)
HANDLE_PACKED_TYPE(SINT32, int32_t, Int32)
HANDLE_PACKED_TYPE(SINT64, int64_t, Int64)
HANDLE_PACKED_TYPE(UINT32, uint32_t, UInt32)
HANDLE_PACKED_TYPE(UINT64, uint64_t, UInt64)
HANDLE_PACKED_TYPE(FIXED32, uint32_t, UInt32)
HANDLE_PACKED_TYPE(FIXED64, uint64_t, UInt64)
HANDLE_PACKED_TYPE(SFIXED32, int32_t, Int32)
HANDLE_PACKED_TYPE(SFIXED64, int64_t, Int64)
HANDLE_PACKED_TYPE(FLOAT, float, Float)
HANDLE_PACKED_TYPE(DOUBLE, double, Double)
HANDLE_PACKED_TYPE(BOOL, bool, Bool)
#undef HANDLE_PACKED_TYPE
case FieldDescriptor::TYPE_ENUM: {
while (input->BytesUntilLimit() > 0) {
int value;
if (!WireFormatLite::ReadPrimitive<int, WireFormatLite::TYPE_ENUM>(
input, &value))
return false;
if (message->GetDescriptor()->file()->syntax() ==
FileDescriptor::SYNTAX_PROTO3) {
message_reflection->AddEnumValue(message, field, value);
} else {
const EnumValueDescriptor* enum_value =
field->enum_type()->FindValueByNumber(value);
if (enum_value != nullptr) {
message_reflection->AddEnum(message, field, enum_value);
} else {
// The enum value is not one of the known values. Add it to the
// UnknownFieldSet.
int64_t sign_extended_value = static_cast<int64_t>(value);
message_reflection->MutableUnknownFields(message)->AddVarint(
WireFormatLite::GetTagFieldNumber(tag), sign_extended_value);
}
}
}
break;
}
case FieldDescriptor::TYPE_STRING:
case FieldDescriptor::TYPE_GROUP:
case FieldDescriptor::TYPE_MESSAGE:
case FieldDescriptor::TYPE_BYTES:
// Can't have packed fields of these types: these should be caught by
// the protocol compiler.
return false;
break;
}
input->PopLimit(limit);
} else {
// Non-packed value (value_format == NORMAL_FORMAT)
switch (field->type()) {
#define HANDLE_TYPE(TYPE, CPPTYPE, CPPTYPE_METHOD) \
case FieldDescriptor::TYPE_##TYPE: { \
CPPTYPE value; \
if (!WireFormatLite::ReadPrimitive<CPPTYPE, WireFormatLite::TYPE_##TYPE>( \
input, &value)) \
return false; \
if (field->is_repeated()) { \
message_reflection->Add##CPPTYPE_METHOD(message, field, value); \
} else { \
message_reflection->Set##CPPTYPE_METHOD(message, field, value); \
} \
break; \
}
HANDLE_TYPE(INT32, int32_t, Int32)
HANDLE_TYPE(INT64, int64_t, Int64)
HANDLE_TYPE(SINT32, int32_t, Int32)
HANDLE_TYPE(SINT64, int64_t, Int64)
HANDLE_TYPE(UINT32, uint32_t, UInt32)
HANDLE_TYPE(UINT64, uint64_t, UInt64)
HANDLE_TYPE(FIXED32, uint32_t, UInt32)
HANDLE_TYPE(FIXED64, uint64_t, UInt64)
HANDLE_TYPE(SFIXED32, int32_t, Int32)
HANDLE_TYPE(SFIXED64, int64_t, Int64)
HANDLE_TYPE(FLOAT, float, Float)
HANDLE_TYPE(DOUBLE, double, Double)
HANDLE_TYPE(BOOL, bool, Bool)
#undef HANDLE_TYPE
case FieldDescriptor::TYPE_ENUM: {
int value;
if (!WireFormatLite::ReadPrimitive<int, WireFormatLite::TYPE_ENUM>(
input, &value))
return false;
if (field->is_repeated()) {
message_reflection->AddEnumValue(message, field, value);
} else {
message_reflection->SetEnumValue(message, field, value);
}
break;
}
// Handle strings separately so that we can optimize the ctype=CORD case.
case FieldDescriptor::TYPE_STRING: {
bool strict_utf8_check = StrictUtf8Check(field);
std::string value;
if (!WireFormatLite::ReadString(input, &value)) return false;
if (strict_utf8_check) {
if (!WireFormatLite::VerifyUtf8String(value.data(), value.length(),
WireFormatLite::PARSE,
field->full_name().c_str())) {
return false;
}
} else {
VerifyUTF8StringNamedField(value.data(), value.length(), PARSE,
field->full_name().c_str());
}
if (field->is_repeated()) {
message_reflection->AddString(message, field, value);
} else {
message_reflection->SetString(message, field, value);
}
break;
}
case FieldDescriptor::TYPE_BYTES: {
std::string value;
if (!WireFormatLite::ReadBytes(input, &value)) return false;
if (field->is_repeated()) {
message_reflection->AddString(message, field, value);
} else {
message_reflection->SetString(message, field, value);
}
break;
}
case FieldDescriptor::TYPE_GROUP: {
Message* sub_message;
if (field->is_repeated()) {
sub_message = message_reflection->AddMessage(
message, field, input->GetExtensionFactory());
} else {
sub_message = message_reflection->MutableMessage(
message, field, input->GetExtensionFactory());
}
if (!WireFormatLite::ReadGroup(WireFormatLite::GetTagFieldNumber(tag),
input, sub_message))
return false;
break;
}
case FieldDescriptor::TYPE_MESSAGE: {
Message* sub_message;
if (field->is_repeated()) {
sub_message = message_reflection->AddMessage(
message, field, input->GetExtensionFactory());
} else {
sub_message = message_reflection->MutableMessage(
message, field, input->GetExtensionFactory());
}
if (!WireFormatLite::ReadMessage(input, sub_message)) return false;
break;
}
}
}
return true;
}
bool WireFormat::ParseAndMergeMessageSetItem(io::CodedInputStream* input,
Message* message) {
struct MSReflective {
bool ParseField(int type_id, io::CodedInputStream* input) {
const FieldDescriptor* field =
message_reflection->FindKnownExtensionByNumber(type_id);
return ParseAndMergeMessageSetField(type_id, field, message, input);
}
bool SkipField(uint32_t tag, io::CodedInputStream* input) {
return WireFormat::SkipField(input, tag, nullptr);
}
const Reflection* message_reflection;
Message* message;
};
return ParseMessageSetItemImpl(
input, MSReflective{message->GetReflection(), message});
}
struct WireFormat::MessageSetParser {
const char* _InternalParse(const char* ptr, internal::ParseContext* ctx) {
// Parse a MessageSetItem
auto metadata = reflection->MutableInternalMetadata(msg);
enum class State { kNoTag, kHasType, kHasPayload, kDone };
State state = State::kNoTag;
std::string payload;
uint32_t type_id = 0;
while (!ctx->Done(&ptr)) {
// We use 64 bit tags in order to allow typeid's that span the whole
// range of 32 bit numbers.
uint32_t tag = static_cast<uint8_t>(*ptr++);
if (tag == WireFormatLite::kMessageSetTypeIdTag) {
uint64_t tmp;
ptr = ParseBigVarint(ptr, &tmp);
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
if (state == State::kNoTag) {
type_id = tmp;
state = State::kHasType;
} else if (state == State::kHasPayload) {
type_id = tmp;
const FieldDescriptor* field;
if (ctx->data().pool == nullptr) {
field = reflection->FindKnownExtensionByNumber(type_id);
} else {
field =
ctx->data().pool->FindExtensionByNumber(descriptor, type_id);
}
if (field == nullptr || field->message_type() == nullptr) {
WriteLengthDelimited(
type_id, payload,
metadata->mutable_unknown_fields<UnknownFieldSet>());
} else {
Message* value =
field->is_repeated()
? reflection->AddMessage(msg, field, ctx->data().factory)
: reflection->MutableMessage(msg, field,
ctx->data().factory);
const char* p;
// We can't use regular parse from string as we have to track
// proper recursion depth and descriptor pools.
ParseContext tmp_ctx(ctx->depth(), false, &p, payload);
tmp_ctx.data().pool = ctx->data().pool;
tmp_ctx.data().factory = ctx->data().factory;
GOOGLE_PROTOBUF_PARSER_ASSERT(value->_InternalParse(p, &tmp_ctx) &&
tmp_ctx.EndedAtLimit());
}
state = State::kDone;
}
continue;
} else if (tag == WireFormatLite::kMessageSetMessageTag) {
if (state == State::kNoTag) {
int32_t size = ReadSize(&ptr);
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
ptr = ctx->ReadString(ptr, size, &payload);
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
state = State::kHasPayload;
} else if (state == State::kHasType) {
// We're now parsing the payload
const FieldDescriptor* field = nullptr;
if (descriptor->IsExtensionNumber(type_id)) {
if (ctx->data().pool == nullptr) {
field = reflection->FindKnownExtensionByNumber(type_id);
} else {
field =
ctx->data().pool->FindExtensionByNumber(descriptor, type_id);
}
}
ptr = WireFormat::_InternalParseAndMergeField(
msg, ptr, ctx, static_cast<uint64_t>(type_id) * 8 + 2, reflection,
field);
state = State::kDone;
} else {
int32_t size = ReadSize(&ptr);
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
ptr = ctx->Skip(ptr, size);
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
}
} else {
// An unknown field in MessageSetItem.
ptr = ReadTag(ptr - 1, &tag);
if (tag == 0 || (tag & 7) == WireFormatLite::WIRETYPE_END_GROUP) {
ctx->SetLastTag(tag);
return ptr;
}
// Skip field.
ptr = internal::UnknownFieldParse(
tag, static_cast<std::string*>(nullptr), ptr, ctx);
}
GOOGLE_PROTOBUF_PARSER_ASSERT(ptr);
}
return ptr;
}
const char* ParseMessageSet(const char* ptr, internal::ParseContext* ctx) {
while (!ctx->Done(&ptr)) {
uint32_t tag;
ptr = ReadTag(ptr, &tag);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) return nullptr;
if (tag == 0 || (tag & 7) == WireFormatLite::WIRETYPE_END_GROUP) {
ctx->SetLastTag(tag);
break;
}
if (tag == WireFormatLite::kMessageSetItemStartTag) {
// A message set item starts
ptr = ctx->ParseGroup(this, ptr, tag);
} else {
// Parse other fields as normal extensions.
int field_number = WireFormatLite::GetTagFieldNumber(tag);
const FieldDescriptor* field = nullptr;
if (descriptor->IsExtensionNumber(field_number)) {
if (ctx->data().pool == nullptr) {
field = reflection->FindKnownExtensionByNumber(field_number);
} else {
field = ctx->data().pool->FindExtensionByNumber(descriptor,
field_number);
}
}
ptr = WireFormat::_InternalParseAndMergeField(msg, ptr, ctx, tag,
reflection, field);
}
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) return nullptr;
}
return ptr;
}
Message* msg;
const Descriptor* descriptor;
const Reflection* reflection;
};
const char* WireFormat::_InternalParse(Message* msg, const char* ptr,
internal::ParseContext* ctx) {
const Descriptor* descriptor = msg->GetDescriptor();
const Reflection* reflection = msg->GetReflection();
GOOGLE_DCHECK(descriptor);
GOOGLE_DCHECK(reflection);
if (descriptor->options().message_set_wire_format()) {
MessageSetParser message_set{msg, descriptor, reflection};
return message_set.ParseMessageSet(ptr, ctx);
}
while (!ctx->Done(&ptr)) {
uint32_t tag;
ptr = ReadTag(ptr, &tag);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) return nullptr;
if (tag == 0 || (tag & 7) == WireFormatLite::WIRETYPE_END_GROUP) {
ctx->SetLastTag(tag);
break;
}
const FieldDescriptor* field = nullptr;
int field_number = WireFormatLite::GetTagFieldNumber(tag);
field = descriptor->FindFieldByNumber(field_number);
// If that failed, check if the field is an extension.
if (field == nullptr && descriptor->IsExtensionNumber(field_number)) {
if (ctx->data().pool == nullptr) {
field = reflection->FindKnownExtensionByNumber(field_number);
} else {
field =
ctx->data().pool->FindExtensionByNumber(descriptor, field_number);
}
}
ptr = _InternalParseAndMergeField(msg, ptr, ctx, tag, reflection, field);
if (PROTOBUF_PREDICT_FALSE(ptr == nullptr)) return nullptr;
}
return ptr;
}
const char* WireFormat::_InternalParseAndMergeField(
Message* msg, const char* ptr, internal::ParseContext* ctx, uint64_t tag,
const Reflection* reflection, const FieldDescriptor* field) {
if (field == nullptr) {
// unknown field set parser takes 64bit tags, because message set type ids
// span the full 32 bit range making the tag span [0, 2^35) range.
return internal::UnknownFieldParse(
tag, reflection->MutableUnknownFields(msg), ptr, ctx);
}
if (WireFormatLite::GetTagWireType(tag) !=
WireTypeForFieldType(field->type())) {
if (field->is_packable() && WireFormatLite::GetTagWireType(tag) ==
WireFormatLite::WIRETYPE_LENGTH_DELIMITED) {
switch (field->type()) {
#define HANDLE_PACKED_TYPE(TYPE, CPPTYPE, CPPTYPE_METHOD) \
case FieldDescriptor::TYPE_##TYPE: { \
ptr = internal::Packed##CPPTYPE_METHOD##Parser( \
reflection->MutableRepeatedFieldInternal<CPPTYPE>(msg, field), ptr, \
ctx); \
return ptr; \
}
HANDLE_PACKED_TYPE(INT32, int32_t, Int32)
HANDLE_PACKED_TYPE(INT64, int64_t, Int64)
HANDLE_PACKED_TYPE(SINT32, int32_t, SInt32)
HANDLE_PACKED_TYPE(SINT64, int64_t, SInt64)
HANDLE_PACKED_TYPE(UINT32, uint32_t, UInt32)
HANDLE_PACKED_TYPE(UINT64, uint64_t, UInt64)
HANDLE_PACKED_TYPE(FIXED32, uint32_t, Fixed32)
HANDLE_PACKED_TYPE(FIXED64, uint64_t, Fixed64)
HANDLE_PACKED_TYPE(SFIXED32, int32_t, SFixed32)
HANDLE_PACKED_TYPE(SFIXED64, int64_t, SFixed64)
HANDLE_PACKED_TYPE(FLOAT, float, Float)
HANDLE_PACKED_TYPE(DOUBLE, double, Double)
HANDLE_PACKED_TYPE(BOOL, bool, Bool)
#undef HANDLE_PACKED_TYPE
case FieldDescriptor::TYPE_ENUM: {
auto rep_enum =
reflection->MutableRepeatedFieldInternal<int>(msg, field);
bool open_enum = false;
if (field->file()->syntax() == FileDescriptor::SYNTAX_PROTO3 ||
open_enum) {
ptr = internal::PackedEnumParser(rep_enum, ptr, ctx);
} else {
return ctx->ReadPackedVarint(
ptr, [rep_enum, field, reflection, msg](uint64_t val) {
if (field->enum_type()->FindValueByNumber(val) != nullptr) {
rep_enum->Add(val);
} else {
WriteVarint(field->number(), val,
reflection->MutableUnknownFields(msg));
}
});
}
return ptr;
}
case FieldDescriptor::TYPE_STRING:
case FieldDescriptor::TYPE_GROUP:
case FieldDescriptor::TYPE_MESSAGE:
case FieldDescriptor::TYPE_BYTES:
GOOGLE_LOG(FATAL) << "Can't reach";
return nullptr;
}
} else {
// mismatched wiretype;
return internal::UnknownFieldParse(
tag, reflection->MutableUnknownFields(msg), ptr, ctx);
}
}
// Non-packed value
bool utf8_check = false;
bool strict_utf8_check = false;
switch (field->type()) {
#define HANDLE_TYPE(TYPE, CPPTYPE, CPPTYPE_METHOD) \
case FieldDescriptor::TYPE_##TYPE: { \
CPPTYPE value; \
ptr = VarintParse(ptr, &value); \
if (ptr == nullptr) return nullptr; \
if (field->is_repeated()) { \
reflection->Add##CPPTYPE_METHOD(msg, field, value); \
} else { \
reflection->Set##CPPTYPE_METHOD(msg, field, value); \
} \
return ptr; \
}
HANDLE_TYPE(BOOL, uint64_t, Bool)
HANDLE_TYPE(INT32, uint32_t, Int32)
HANDLE_TYPE(INT64, uint64_t, Int64)
HANDLE_TYPE(UINT32, uint32_t, UInt32)
HANDLE_TYPE(UINT64, uint64_t, UInt64)
case FieldDescriptor::TYPE_SINT32: {
int32_t value = ReadVarintZigZag32(&ptr);
if (ptr == nullptr) return nullptr;
if (field->is_repeated()) {
reflection->AddInt32(msg, field, value);
} else {
reflection->SetInt32(msg, field, value);
}
return ptr;
}
case FieldDescriptor::TYPE_SINT64: {
int64_t value = ReadVarintZigZag64(&ptr);
if (ptr == nullptr) return nullptr;
if (field->is_repeated()) {
reflection->AddInt64(msg, field, value);
} else {
reflection->SetInt64(msg, field, value);
}
return ptr;
}
#undef HANDLE_TYPE
#define HANDLE_TYPE(TYPE, CPPTYPE, CPPTYPE_METHOD) \
case FieldDescriptor::TYPE_##TYPE: { \
CPPTYPE value; \
value = UnalignedLoad<CPPTYPE>(ptr); \
ptr += sizeof(CPPTYPE); \
if (field->is_repeated()) { \
reflection->Add##CPPTYPE_METHOD(msg, field, value); \
} else { \
reflection->Set##CPPTYPE_METHOD(msg, field, value); \
} \
return ptr; \
}
HANDLE_TYPE(FIXED32, uint32_t, UInt32)
HANDLE_TYPE(FIXED64, uint64_t, UInt64)
HANDLE_TYPE(SFIXED32, int32_t, Int32)
HANDLE_TYPE(SFIXED64, int64_t, Int64)
HANDLE_TYPE(FLOAT, float, Float)
HANDLE_TYPE(DOUBLE, double, Double)
#undef HANDLE_TYPE
case FieldDescriptor::TYPE_ENUM: {
uint32_t value;
ptr = VarintParse(ptr, &value);
if (ptr == nullptr) return nullptr;
if (field->is_repeated()) {
reflection->AddEnumValue(msg, field, value);
} else {
reflection->SetEnumValue(msg, field, value);
}
return ptr;
}
// Handle strings separately so that we can optimize the ctype=CORD case.
case FieldDescriptor::TYPE_STRING:
utf8_check = true;
strict_utf8_check = StrictUtf8Check(field);
PROTOBUF_FALLTHROUGH_INTENDED;
case FieldDescriptor::TYPE_BYTES: {
int size = ReadSize(&ptr);
if (ptr == nullptr) return nullptr;
std::string value;
ptr = ctx->ReadString(ptr, size, &value);
if (ptr == nullptr) return nullptr;
if (utf8_check) {
if (strict_utf8_check) {
if (!WireFormatLite::VerifyUtf8String(value.data(), value.length(),
WireFormatLite::PARSE,
field->full_name().c_str())) {
return nullptr;
}
} else {
VerifyUTF8StringNamedField(value.data(), value.length(), PARSE,