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dfhack/depends/protobuf/google/protobuf/wire_format_lite.cc

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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// http://code.google.com/p/protobuf/
//
// 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_lite_inl.h>
#include <stack>
#include <string>
#include <vector>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/io/coded_stream_inl.h>
#include <google/protobuf/io/zero_copy_stream.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
namespace google {
namespace protobuf {
namespace internal {
#ifndef _MSC_VER // MSVC doesn't like definitions of inline constants, GCC
// requires them.
const int WireFormatLite::kMessageSetItemStartTag;
const int WireFormatLite::kMessageSetItemEndTag;
const int WireFormatLite::kMessageSetTypeIdTag;
const int WireFormatLite::kMessageSetMessageTag;
#endif
const int WireFormatLite::kMessageSetItemTagsSize =
io::CodedOutputStream::VarintSize32(kMessageSetItemStartTag) +
io::CodedOutputStream::VarintSize32(kMessageSetItemEndTag) +
io::CodedOutputStream::VarintSize32(kMessageSetTypeIdTag) +
io::CodedOutputStream::VarintSize32(kMessageSetMessageTag);
const WireFormatLite::CppType
WireFormatLite::kFieldTypeToCppTypeMap[MAX_FIELD_TYPE + 1] = {
static_cast<CppType>(0), // 0 is reserved for errors
CPPTYPE_DOUBLE, // TYPE_DOUBLE
CPPTYPE_FLOAT, // TYPE_FLOAT
CPPTYPE_INT64, // TYPE_INT64
CPPTYPE_UINT64, // TYPE_UINT64
CPPTYPE_INT32, // TYPE_INT32
CPPTYPE_UINT64, // TYPE_FIXED64
CPPTYPE_UINT32, // TYPE_FIXED32
CPPTYPE_BOOL, // TYPE_BOOL
CPPTYPE_STRING, // TYPE_STRING
CPPTYPE_MESSAGE, // TYPE_GROUP
CPPTYPE_MESSAGE, // TYPE_MESSAGE
CPPTYPE_STRING, // TYPE_BYTES
CPPTYPE_UINT32, // TYPE_UINT32
CPPTYPE_ENUM, // TYPE_ENUM
CPPTYPE_INT32, // TYPE_SFIXED32
CPPTYPE_INT64, // TYPE_SFIXED64
CPPTYPE_INT32, // TYPE_SINT32
CPPTYPE_INT64, // TYPE_SINT64
};
const WireFormatLite::WireType
WireFormatLite::kWireTypeForFieldType[MAX_FIELD_TYPE + 1] = {
static_cast<WireFormatLite::WireType>(-1), // invalid
WireFormatLite::WIRETYPE_FIXED64, // TYPE_DOUBLE
WireFormatLite::WIRETYPE_FIXED32, // TYPE_FLOAT
WireFormatLite::WIRETYPE_VARINT, // TYPE_INT64
WireFormatLite::WIRETYPE_VARINT, // TYPE_UINT64
WireFormatLite::WIRETYPE_VARINT, // TYPE_INT32
WireFormatLite::WIRETYPE_FIXED64, // TYPE_FIXED64
WireFormatLite::WIRETYPE_FIXED32, // TYPE_FIXED32
WireFormatLite::WIRETYPE_VARINT, // TYPE_BOOL
WireFormatLite::WIRETYPE_LENGTH_DELIMITED, // TYPE_STRING
WireFormatLite::WIRETYPE_START_GROUP, // TYPE_GROUP
WireFormatLite::WIRETYPE_LENGTH_DELIMITED, // TYPE_MESSAGE
WireFormatLite::WIRETYPE_LENGTH_DELIMITED, // TYPE_BYTES
WireFormatLite::WIRETYPE_VARINT, // TYPE_UINT32
WireFormatLite::WIRETYPE_VARINT, // TYPE_ENUM
WireFormatLite::WIRETYPE_FIXED32, // TYPE_SFIXED32
WireFormatLite::WIRETYPE_FIXED64, // TYPE_SFIXED64
WireFormatLite::WIRETYPE_VARINT, // TYPE_SINT32
WireFormatLite::WIRETYPE_VARINT, // TYPE_SINT64
};
bool WireFormatLite::SkipField(
io::CodedInputStream* input, uint32 tag) {
switch (WireFormatLite::GetTagWireType(tag)) {
case WireFormatLite::WIRETYPE_VARINT: {
uint64 value;
if (!input->ReadVarint64(&value)) return false;
return true;
}
case WireFormatLite::WIRETYPE_FIXED64: {
uint64 value;
if (!input->ReadLittleEndian64(&value)) return false;
return true;
}
case WireFormatLite::WIRETYPE_LENGTH_DELIMITED: {
uint32 length;
if (!input->ReadVarint32(&length)) return false;
if (!input->Skip(length)) return false;
return true;
}
case WireFormatLite::WIRETYPE_START_GROUP: {
if (!input->IncrementRecursionDepth()) return false;
if (!SkipMessage(input)) 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 value;
if (!input->ReadLittleEndian32(&value)) return false;
return true;
}
default: {
return false;
}
}
}
bool WireFormatLite::SkipMessage(io::CodedInputStream* input) {
while(true) {
uint32 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)) return false;
}
}
bool FieldSkipper::SkipField(
io::CodedInputStream* input, uint32 tag) {
return WireFormatLite::SkipField(input, tag);
}
bool FieldSkipper::SkipMessage(io::CodedInputStream* input) {
return WireFormatLite::SkipMessage(input);
}
void FieldSkipper::SkipUnknownEnum(
int field_number, int value) {
// Nothing.
}
bool WireFormatLite::ReadPackedEnumNoInline(io::CodedInputStream* input,
bool (*is_valid)(int),
RepeatedField<int>* values) {
uint32 length;
if (!input->ReadVarint32(&length)) return false;
io::CodedInputStream::Limit limit = input->PushLimit(length);
while (input->BytesUntilLimit() > 0) {
int value;
if (!google::protobuf::internal::WireFormatLite::ReadPrimitive<
int, WireFormatLite::TYPE_ENUM>(input, &value)) {
return false;
}
if (is_valid(value)) {
values->Add(value);
}
}
input->PopLimit(limit);
return true;
}
void WireFormatLite::WriteInt32(int field_number, int32 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteInt32NoTag(value, output);
}
void WireFormatLite::WriteInt64(int field_number, int64 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteInt64NoTag(value, output);
}
void WireFormatLite::WriteUInt32(int field_number, uint32 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteUInt32NoTag(value, output);
}
void WireFormatLite::WriteUInt64(int field_number, uint64 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteUInt64NoTag(value, output);
}
void WireFormatLite::WriteSInt32(int field_number, int32 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteSInt32NoTag(value, output);
}
void WireFormatLite::WriteSInt64(int field_number, int64 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteSInt64NoTag(value, output);
}
void WireFormatLite::WriteFixed32(int field_number, uint32 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED32, output);
WriteFixed32NoTag(value, output);
}
void WireFormatLite::WriteFixed64(int field_number, uint64 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED64, output);
WriteFixed64NoTag(value, output);
}
void WireFormatLite::WriteSFixed32(int field_number, int32 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED32, output);
WriteSFixed32NoTag(value, output);
}
void WireFormatLite::WriteSFixed64(int field_number, int64 value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED64, output);
WriteSFixed64NoTag(value, output);
}
void WireFormatLite::WriteFloat(int field_number, float value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED32, output);
WriteFloatNoTag(value, output);
}
void WireFormatLite::WriteDouble(int field_number, double value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_FIXED64, output);
WriteDoubleNoTag(value, output);
}
void WireFormatLite::WriteBool(int field_number, bool value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteBoolNoTag(value, output);
}
void WireFormatLite::WriteEnum(int field_number, int value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_VARINT, output);
WriteEnumNoTag(value, output);
}
void WireFormatLite::WriteString(int field_number, const string& value,
io::CodedOutputStream* output) {
// String is for UTF-8 text only
WriteTag(field_number, WIRETYPE_LENGTH_DELIMITED, output);
output->WriteVarint32(value.size());
output->WriteString(value);
}
void WireFormatLite::WriteBytes(int field_number, const string& value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_LENGTH_DELIMITED, output);
output->WriteVarint32(value.size());
output->WriteString(value);
}
void WireFormatLite::WriteGroup(int field_number,
const MessageLite& value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_START_GROUP, output);
value.SerializeWithCachedSizes(output);
WriteTag(field_number, WIRETYPE_END_GROUP, output);
}
void WireFormatLite::WriteMessage(int field_number,
const MessageLite& value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_LENGTH_DELIMITED, output);
const int size = value.GetCachedSize();
output->WriteVarint32(size);
value.SerializeWithCachedSizes(output);
}
void WireFormatLite::WriteGroupMaybeToArray(int field_number,
const MessageLite& value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_START_GROUP, output);
const int size = value.GetCachedSize();
uint8* target = output->GetDirectBufferForNBytesAndAdvance(size);
if (target != NULL) {
uint8* end = value.SerializeWithCachedSizesToArray(target);
GOOGLE_DCHECK_EQ(end - target, size);
} else {
value.SerializeWithCachedSizes(output);
}
WriteTag(field_number, WIRETYPE_END_GROUP, output);
}
void WireFormatLite::WriteMessageMaybeToArray(int field_number,
const MessageLite& value,
io::CodedOutputStream* output) {
WriteTag(field_number, WIRETYPE_LENGTH_DELIMITED, output);
const int size = value.GetCachedSize();
output->WriteVarint32(size);
uint8* target = output->GetDirectBufferForNBytesAndAdvance(size);
if (target != NULL) {
uint8* end = value.SerializeWithCachedSizesToArray(target);
GOOGLE_DCHECK_EQ(end - target, size);
} else {
value.SerializeWithCachedSizes(output);
}
}
bool WireFormatLite::ReadString(io::CodedInputStream* input,
string* value) {
// String is for UTF-8 text only
uint32 length;
if (!input->ReadVarint32(&length)) return false;
if (!input->InternalReadStringInline(value, length)) return false;
return true;
}
bool WireFormatLite::ReadBytes(io::CodedInputStream* input,
string* value) {
uint32 length;
if (!input->ReadVarint32(&length)) return false;
return input->InternalReadStringInline(value, length);
}
} // namespace internal
} // namespace protobuf
} // namespace google
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