blob: d4e383da234a0c55b88d5b3b6b29726d4fa3a9bd [file] [log] [blame]
// 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/unknown_field_set.h>
#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/stubs/common.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/wire_format.h>
#include <google/protobuf/stubs/stl_util.h>
namespace google {
namespace protobuf {
namespace {
// This global instance is returned by unknown_fields() on any message class
// when the object has no unknown fields. This is necessary because we now
// instantiate the UnknownFieldSet dynamically only when required.
UnknownFieldSet* default_unknown_field_set_instance_ = NULL;
void DeleteDefaultUnknownFieldSet() {
delete default_unknown_field_set_instance_;
}
void InitDefaultUnknownFieldSet() {
default_unknown_field_set_instance_ = new UnknownFieldSet();
internal::OnShutdown(&DeleteDefaultUnknownFieldSet);
}
GOOGLE_PROTOBUF_DECLARE_ONCE(default_unknown_field_set_once_init_);
}
const UnknownFieldSet* UnknownFieldSet::default_instance() {
::google::protobuf::GoogleOnceInit(&default_unknown_field_set_once_init_,
&InitDefaultUnknownFieldSet);
return default_unknown_field_set_instance_;
}
UnknownFieldSet::UnknownFieldSet()
: fields_(NULL) {}
UnknownFieldSet::~UnknownFieldSet() {
Clear();
delete fields_;
}
void UnknownFieldSet::ClearFallback() {
if (fields_ != NULL) {
for (int i = 0; i < fields_->size(); i++) {
(*fields_)[i].Delete();
}
delete fields_;
fields_ = NULL;
}
}
void UnknownFieldSet::ClearAndFreeMemory() {
if (fields_ != NULL) {
Clear();
}
}
void UnknownFieldSet::InternalMergeFrom(const UnknownFieldSet& other) {
int other_field_count = other.field_count();
if (other_field_count > 0) {
fields_ = new vector<UnknownField>();
for (int i = 0; i < other_field_count; i++) {
fields_->push_back((*other.fields_)[i]);
fields_->back().DeepCopy((*other.fields_)[i]);
}
}
}
void UnknownFieldSet::MergeFrom(const UnknownFieldSet& other) {
int other_field_count = other.field_count();
if (other_field_count > 0) {
if (fields_ == NULL) fields_ = new vector<UnknownField>();
for (int i = 0; i < other_field_count; i++) {
fields_->push_back((*other.fields_)[i]);
fields_->back().DeepCopy((*other.fields_)[i]);
}
}
}
// A specialized MergeFrom for performance when we are merging from an UFS that
// is temporary and can be destroyed in the process.
void UnknownFieldSet::MergeFromAndDestroy(UnknownFieldSet* other) {
int other_field_count = other->field_count();
if (other_field_count > 0) {
if (fields_ == NULL) fields_ = new vector<UnknownField>();
for (int i = 0; i < other_field_count; i++) {
fields_->push_back((*other->fields_)[i]);
(*other->fields_)[i].Reset();
}
}
delete other->fields_;
other->fields_ = NULL;
}
int UnknownFieldSet::SpaceUsedExcludingSelf() const {
if (fields_ == NULL) return 0;
int total_size = sizeof(*fields_) + sizeof(UnknownField) * fields_->size();
for (int i = 0; i < fields_->size(); i++) {
const UnknownField& field = (*fields_)[i];
switch (field.type()) {
case UnknownField::TYPE_LENGTH_DELIMITED:
total_size += sizeof(*field.length_delimited_.string_value_) +
internal::StringSpaceUsedExcludingSelf(
*field.length_delimited_.string_value_);
break;
case UnknownField::TYPE_GROUP:
total_size += field.group_->SpaceUsed();
break;
default:
break;
}
}
return total_size;
}
int UnknownFieldSet::SpaceUsed() const {
return sizeof(*this) + SpaceUsedExcludingSelf();
}
void UnknownFieldSet::AddVarint(int number, uint64 value) {
UnknownField field;
field.number_ = number;
field.SetType(UnknownField::TYPE_VARINT);
field.varint_ = value;
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
}
void UnknownFieldSet::AddFixed32(int number, uint32 value) {
UnknownField field;
field.number_ = number;
field.SetType(UnknownField::TYPE_FIXED32);
field.fixed32_ = value;
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
}
void UnknownFieldSet::AddFixed64(int number, uint64 value) {
UnknownField field;
field.number_ = number;
field.SetType(UnknownField::TYPE_FIXED64);
field.fixed64_ = value;
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
}
string* UnknownFieldSet::AddLengthDelimited(int number) {
UnknownField field;
field.number_ = number;
field.SetType(UnknownField::TYPE_LENGTH_DELIMITED);
field.length_delimited_.string_value_ = new string;
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
return field.length_delimited_.string_value_;
}
UnknownFieldSet* UnknownFieldSet::AddGroup(int number) {
UnknownField field;
field.number_ = number;
field.SetType(UnknownField::TYPE_GROUP);
field.group_ = new UnknownFieldSet;
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
return field.group_;
}
void UnknownFieldSet::AddField(const UnknownField& field) {
if (fields_ == NULL) fields_ = new vector<UnknownField>();
fields_->push_back(field);
fields_->back().DeepCopy(field);
}
void UnknownFieldSet::DeleteSubrange(int start, int num) {
// Delete the specified fields.
for (int i = 0; i < num; ++i) {
(*fields_)[i + start].Delete();
}
// Slide down the remaining fields.
for (int i = start + num; i < fields_->size(); ++i) {
(*fields_)[i - num] = (*fields_)[i];
}
// Pop off the # of deleted fields.
for (int i = 0; i < num; ++i) {
fields_->pop_back();
}
if (fields_ && fields_->size() == 0) {
// maintain invariant: never hold fields_ if empty.
delete fields_;
fields_ = NULL;
}
}
void UnknownFieldSet::DeleteByNumber(int number) {
if (fields_ == NULL) return;
int left = 0; // The number of fields left after deletion.
for (int i = 0; i < fields_->size(); ++i) {
UnknownField* field = &(*fields_)[i];
if (field->number() == number) {
field->Delete();
} else {
if (i != left) {
(*fields_)[left] = (*fields_)[i];
}
++left;
}
}
fields_->resize(left);
if (left == 0) {
// maintain invariant: never hold fields_ if empty.
delete fields_;
fields_ = NULL;
}
}
bool UnknownFieldSet::MergeFromCodedStream(io::CodedInputStream* input) {
UnknownFieldSet other;
if (internal::WireFormat::SkipMessage(input, &other) &&
input->ConsumedEntireMessage()) {
MergeFromAndDestroy(&other);
return true;
} else {
return false;
}
}
bool UnknownFieldSet::ParseFromCodedStream(io::CodedInputStream* input) {
Clear();
return MergeFromCodedStream(input);
}
bool UnknownFieldSet::ParseFromZeroCopyStream(io::ZeroCopyInputStream* input) {
io::CodedInputStream coded_input(input);
return (ParseFromCodedStream(&coded_input) &&
coded_input.ConsumedEntireMessage());
}
bool UnknownFieldSet::ParseFromArray(const void* data, int size) {
io::ArrayInputStream input(data, size);
return ParseFromZeroCopyStream(&input);
}
void UnknownField::Delete() {
switch (type()) {
case UnknownField::TYPE_LENGTH_DELIMITED:
delete length_delimited_.string_value_;
break;
case UnknownField::TYPE_GROUP:
delete group_;
break;
default:
break;
}
}
// Reset all owned ptrs, a special function for performance, to avoid double
// owning the ptrs, when we merge from a temporary UnknownFieldSet objects.
void UnknownField::Reset() {
switch (type()) {
case UnknownField::TYPE_LENGTH_DELIMITED:
length_delimited_.string_value_ = NULL;
break;
case UnknownField::TYPE_GROUP: {
group_ = NULL;
break;
}
default:
break;
}
}
void UnknownField::DeepCopy(const UnknownField& other) {
switch (type()) {
case UnknownField::TYPE_LENGTH_DELIMITED:
length_delimited_.string_value_ = new string(
*length_delimited_.string_value_);
break;
case UnknownField::TYPE_GROUP: {
UnknownFieldSet* group = new UnknownFieldSet();
group->InternalMergeFrom(*group_);
group_ = group;
break;
}
default:
break;
}
}
void UnknownField::SerializeLengthDelimitedNoTag(
io::CodedOutputStream* output) const {
GOOGLE_DCHECK_EQ(TYPE_LENGTH_DELIMITED, type());
const string& data = *length_delimited_.string_value_;
output->WriteVarint32(data.size());
output->WriteRawMaybeAliased(data.data(), data.size());
}
uint8* UnknownField::SerializeLengthDelimitedNoTagToArray(uint8* target) const {
GOOGLE_DCHECK_EQ(TYPE_LENGTH_DELIMITED, type());
const string& data = *length_delimited_.string_value_;
target = io::CodedOutputStream::WriteVarint32ToArray(data.size(), target);
target = io::CodedOutputStream::WriteStringToArray(data, target);
return target;
}
} // namespace protobuf
} // namespace google