dfhack/depends/protobuf/google/protobuf/descriptor_database.cc

542 lines
18 KiB
C++

// 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/descriptor_database.h>
#include <set>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/wire_format_lite_inl.h>
#include <google/protobuf/stubs/strutil.h>
#include <google/protobuf/stubs/stl_util-inl.h>
#include <google/protobuf/stubs/map-util.h>
namespace google {
namespace protobuf {
DescriptorDatabase::~DescriptorDatabase() {}
// ===================================================================
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::AddFile(
const FileDescriptorProto& file,
Value value) {
if (!InsertIfNotPresent(&by_name_, file.name(), value)) {
GOOGLE_LOG(ERROR) << "File already exists in database: " << file.name();
return false;
}
// We must be careful here -- calling file.package() if file.has_package() is
// false could access an uninitialized static-storage variable if we are being
// run at startup time.
string path = file.has_package() ? file.package() : string();
if (!path.empty()) path += '.';
for (int i = 0; i < file.message_type_size(); i++) {
if (!AddSymbol(path + file.message_type(i).name(), value)) return false;
if (!AddNestedExtensions(file.message_type(i), value)) return false;
}
for (int i = 0; i < file.enum_type_size(); i++) {
if (!AddSymbol(path + file.enum_type(i).name(), value)) return false;
}
for (int i = 0; i < file.extension_size(); i++) {
if (!AddSymbol(path + file.extension(i).name(), value)) return false;
if (!AddExtension(file.extension(i), value)) return false;
}
for (int i = 0; i < file.service_size(); i++) {
if (!AddSymbol(path + file.service(i).name(), value)) return false;
}
return true;
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::AddSymbol(
const string& name, Value value) {
// We need to make sure not to violate our map invariant.
// If the symbol name is invalid it could break our lookup algorithm (which
// relies on the fact that '.' sorts before all other characters that are
// valid in symbol names).
if (!ValidateSymbolName(name)) {
GOOGLE_LOG(ERROR) << "Invalid symbol name: " << name;
return false;
}
// Try to look up the symbol to make sure a super-symbol doesn't already
// exist.
typename map<string, Value>::iterator iter = FindLastLessOrEqual(name);
if (iter == by_symbol_.end()) {
// Apparently the map is currently empty. Just insert and be done with it.
by_symbol_.insert(typename map<string, Value>::value_type(name, value));
return true;
}
if (IsSubSymbol(iter->first, name)) {
GOOGLE_LOG(ERROR) << "Symbol name \"" << name << "\" conflicts with the existing "
"symbol \"" << iter->first << "\".";
return false;
}
// OK, that worked. Now we have to make sure that no symbol in the map is
// a sub-symbol of the one we are inserting. The only symbol which could
// be so is the first symbol that is greater than the new symbol. Since
// |iter| points at the last symbol that is less than or equal, we just have
// to increment it.
++iter;
if (iter != by_symbol_.end() && IsSubSymbol(name, iter->first)) {
GOOGLE_LOG(ERROR) << "Symbol name \"" << name << "\" conflicts with the existing "
"symbol \"" << iter->first << "\".";
return false;
}
// OK, no conflicts.
// Insert the new symbol using the iterator as a hint, the new entry will
// appear immediately before the one the iterator is pointing at.
by_symbol_.insert(iter, typename map<string, Value>::value_type(name, value));
return true;
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::AddNestedExtensions(
const DescriptorProto& message_type,
Value value) {
for (int i = 0; i < message_type.nested_type_size(); i++) {
if (!AddNestedExtensions(message_type.nested_type(i), value)) return false;
}
for (int i = 0; i < message_type.extension_size(); i++) {
if (!AddExtension(message_type.extension(i), value)) return false;
}
return true;
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::AddExtension(
const FieldDescriptorProto& field,
Value value) {
if (!field.extendee().empty() && field.extendee()[0] == '.') {
// The extension is fully-qualified. We can use it as a lookup key in
// the by_symbol_ table.
if (!InsertIfNotPresent(&by_extension_,
make_pair(field.extendee().substr(1),
field.number()),
value)) {
GOOGLE_LOG(ERROR) << "Extension conflicts with extension already in database: "
"extend " << field.extendee() << " { "
<< field.name() << " = " << field.number() << " }";
return false;
}
} else {
// Not fully-qualified. We can't really do anything here, unfortunately.
// We don't consider this an error, though, because the descriptor is
// valid.
}
return true;
}
template <typename Value>
Value SimpleDescriptorDatabase::DescriptorIndex<Value>::FindFile(
const string& filename) {
return FindWithDefault(by_name_, filename, Value());
}
template <typename Value>
Value SimpleDescriptorDatabase::DescriptorIndex<Value>::FindSymbol(
const string& name) {
typename map<string, Value>::iterator iter = FindLastLessOrEqual(name);
return (iter != by_symbol_.end() && IsSubSymbol(iter->first, name)) ?
iter->second : Value();
}
template <typename Value>
Value SimpleDescriptorDatabase::DescriptorIndex<Value>::FindExtension(
const string& containing_type,
int field_number) {
return FindWithDefault(by_extension_,
make_pair(containing_type, field_number),
Value());
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::FindAllExtensionNumbers(
const string& containing_type,
vector<int>* output) {
typename map<pair<string, int>, Value >::const_iterator it =
by_extension_.lower_bound(make_pair(containing_type, 0));
bool success = false;
for (; it != by_extension_.end() && it->first.first == containing_type;
++it) {
output->push_back(it->first.second);
success = true;
}
return success;
}
template <typename Value>
typename map<string, Value>::iterator
SimpleDescriptorDatabase::DescriptorIndex<Value>::FindLastLessOrEqual(
const string& name) {
// Find the last key in the map which sorts less than or equal to the
// symbol name. Since upper_bound() returns the *first* key that sorts
// *greater* than the input, we want the element immediately before that.
typename map<string, Value>::iterator iter = by_symbol_.upper_bound(name);
if (iter != by_symbol_.begin()) --iter;
return iter;
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::IsSubSymbol(
const string& sub_symbol, const string& super_symbol) {
return sub_symbol == super_symbol ||
(HasPrefixString(super_symbol, sub_symbol) &&
super_symbol[sub_symbol.size()] == '.');
}
template <typename Value>
bool SimpleDescriptorDatabase::DescriptorIndex<Value>::ValidateSymbolName(
const string& name) {
for (int i = 0; i < name.size(); i++) {
// I don't trust ctype.h due to locales. :(
if (name[i] != '.' && name[i] != '_' &&
(name[i] < '0' || name[i] > '9') &&
(name[i] < 'A' || name[i] > 'Z') &&
(name[i] < 'a' || name[i] > 'z')) {
return false;
}
}
return true;
}
// -------------------------------------------------------------------
SimpleDescriptorDatabase::SimpleDescriptorDatabase() {}
SimpleDescriptorDatabase::~SimpleDescriptorDatabase() {
STLDeleteElements(&files_to_delete_);
}
bool SimpleDescriptorDatabase::Add(const FileDescriptorProto& file) {
FileDescriptorProto* new_file = new FileDescriptorProto;
new_file->CopyFrom(file);
return AddAndOwn(new_file);
}
bool SimpleDescriptorDatabase::AddAndOwn(const FileDescriptorProto* file) {
files_to_delete_.push_back(file);
return index_.AddFile(*file, file);
}
bool SimpleDescriptorDatabase::FindFileByName(
const string& filename,
FileDescriptorProto* output) {
return MaybeCopy(index_.FindFile(filename), output);
}
bool SimpleDescriptorDatabase::FindFileContainingSymbol(
const string& symbol_name,
FileDescriptorProto* output) {
return MaybeCopy(index_.FindSymbol(symbol_name), output);
}
bool SimpleDescriptorDatabase::FindFileContainingExtension(
const string& containing_type,
int field_number,
FileDescriptorProto* output) {
return MaybeCopy(index_.FindExtension(containing_type, field_number), output);
}
bool SimpleDescriptorDatabase::FindAllExtensionNumbers(
const string& extendee_type,
vector<int>* output) {
return index_.FindAllExtensionNumbers(extendee_type, output);
}
bool SimpleDescriptorDatabase::MaybeCopy(const FileDescriptorProto* file,
FileDescriptorProto* output) {
if (file == NULL) return false;
output->CopyFrom(*file);
return true;
}
// -------------------------------------------------------------------
EncodedDescriptorDatabase::EncodedDescriptorDatabase() {}
EncodedDescriptorDatabase::~EncodedDescriptorDatabase() {
for (int i = 0; i < files_to_delete_.size(); i++) {
operator delete(files_to_delete_[i]);
}
}
bool EncodedDescriptorDatabase::Add(
const void* encoded_file_descriptor, int size) {
FileDescriptorProto file;
if (file.ParseFromArray(encoded_file_descriptor, size)) {
return index_.AddFile(file, make_pair(encoded_file_descriptor, size));
} else {
GOOGLE_LOG(ERROR) << "Invalid file descriptor data passed to "
"EncodedDescriptorDatabase::Add().";
return false;
}
}
bool EncodedDescriptorDatabase::AddCopy(
const void* encoded_file_descriptor, int size) {
void* copy = operator new(size);
memcpy(copy, encoded_file_descriptor, size);
files_to_delete_.push_back(copy);
return Add(copy, size);
}
bool EncodedDescriptorDatabase::FindFileByName(
const string& filename,
FileDescriptorProto* output) {
return MaybeParse(index_.FindFile(filename), output);
}
bool EncodedDescriptorDatabase::FindFileContainingSymbol(
const string& symbol_name,
FileDescriptorProto* output) {
return MaybeParse(index_.FindSymbol(symbol_name), output);
}
bool EncodedDescriptorDatabase::FindNameOfFileContainingSymbol(
const string& symbol_name,
string* output) {
pair<const void*, int> encoded_file = index_.FindSymbol(symbol_name);
if (encoded_file.first == NULL) return false;
// Optimization: The name should be the first field in the encoded message.
// Try to just read it directly.
io::CodedInputStream input(reinterpret_cast<const uint8*>(encoded_file.first),
encoded_file.second);
const uint32 kNameTag = internal::WireFormatLite::MakeTag(
FileDescriptorProto::kNameFieldNumber,
internal::WireFormatLite::WIRETYPE_LENGTH_DELIMITED);
if (input.ReadTag() == kNameTag) {
// Success!
return internal::WireFormatLite::ReadString(&input, output);
} else {
// Slow path. Parse whole message.
FileDescriptorProto file_proto;
if (!file_proto.ParseFromArray(encoded_file.first, encoded_file.second)) {
return false;
}
*output = file_proto.name();
return true;
}
}
bool EncodedDescriptorDatabase::FindFileContainingExtension(
const string& containing_type,
int field_number,
FileDescriptorProto* output) {
return MaybeParse(index_.FindExtension(containing_type, field_number),
output);
}
bool EncodedDescriptorDatabase::FindAllExtensionNumbers(
const string& extendee_type,
vector<int>* output) {
return index_.FindAllExtensionNumbers(extendee_type, output);
}
bool EncodedDescriptorDatabase::MaybeParse(
pair<const void*, int> encoded_file,
FileDescriptorProto* output) {
if (encoded_file.first == NULL) return false;
return output->ParseFromArray(encoded_file.first, encoded_file.second);
}
// ===================================================================
DescriptorPoolDatabase::DescriptorPoolDatabase(const DescriptorPool& pool)
: pool_(pool) {}
DescriptorPoolDatabase::~DescriptorPoolDatabase() {}
bool DescriptorPoolDatabase::FindFileByName(
const string& filename,
FileDescriptorProto* output) {
const FileDescriptor* file = pool_.FindFileByName(filename);
if (file == NULL) return false;
output->Clear();
file->CopyTo(output);
return true;
}
bool DescriptorPoolDatabase::FindFileContainingSymbol(
const string& symbol_name,
FileDescriptorProto* output) {
const FileDescriptor* file = pool_.FindFileContainingSymbol(symbol_name);
if (file == NULL) return false;
output->Clear();
file->CopyTo(output);
return true;
}
bool DescriptorPoolDatabase::FindFileContainingExtension(
const string& containing_type,
int field_number,
FileDescriptorProto* output) {
const Descriptor* extendee = pool_.FindMessageTypeByName(containing_type);
if (extendee == NULL) return false;
const FieldDescriptor* extension =
pool_.FindExtensionByNumber(extendee, field_number);
if (extension == NULL) return false;
output->Clear();
extension->file()->CopyTo(output);
return true;
}
bool DescriptorPoolDatabase::FindAllExtensionNumbers(
const string& extendee_type,
vector<int>* output) {
const Descriptor* extendee = pool_.FindMessageTypeByName(extendee_type);
if (extendee == NULL) return false;
vector<const FieldDescriptor*> extensions;
pool_.FindAllExtensions(extendee, &extensions);
for (int i = 0; i < extensions.size(); ++i) {
output->push_back(extensions[i]->number());
}
return true;
}
// ===================================================================
MergedDescriptorDatabase::MergedDescriptorDatabase(
DescriptorDatabase* source1,
DescriptorDatabase* source2) {
sources_.push_back(source1);
sources_.push_back(source2);
}
MergedDescriptorDatabase::MergedDescriptorDatabase(
const vector<DescriptorDatabase*>& sources)
: sources_(sources) {}
MergedDescriptorDatabase::~MergedDescriptorDatabase() {}
bool MergedDescriptorDatabase::FindFileByName(
const string& filename,
FileDescriptorProto* output) {
for (int i = 0; i < sources_.size(); i++) {
if (sources_[i]->FindFileByName(filename, output)) {
return true;
}
}
return false;
}
bool MergedDescriptorDatabase::FindFileContainingSymbol(
const string& symbol_name,
FileDescriptorProto* output) {
for (int i = 0; i < sources_.size(); i++) {
if (sources_[i]->FindFileContainingSymbol(symbol_name, output)) {
// The symbol was found in source i. However, if one of the previous
// sources defines a file with the same name (which presumably doesn't
// contain the symbol, since it wasn't found in that source), then we
// must hide it from the caller.
FileDescriptorProto temp;
for (int j = 0; j < i; j++) {
if (sources_[j]->FindFileByName(output->name(), &temp)) {
// Found conflicting file in a previous source.
return false;
}
}
return true;
}
}
return false;
}
bool MergedDescriptorDatabase::FindFileContainingExtension(
const string& containing_type,
int field_number,
FileDescriptorProto* output) {
for (int i = 0; i < sources_.size(); i++) {
if (sources_[i]->FindFileContainingExtension(
containing_type, field_number, output)) {
// The symbol was found in source i. However, if one of the previous
// sources defines a file with the same name (which presumably doesn't
// contain the symbol, since it wasn't found in that source), then we
// must hide it from the caller.
FileDescriptorProto temp;
for (int j = 0; j < i; j++) {
if (sources_[j]->FindFileByName(output->name(), &temp)) {
// Found conflicting file in a previous source.
return false;
}
}
return true;
}
}
return false;
}
bool MergedDescriptorDatabase::FindAllExtensionNumbers(
const string& extendee_type,
vector<int>* output) {
set<int> merged_results;
vector<int> results;
bool success = false;
for (int i = 0; i < sources_.size(); i++) {
if (sources_[i]->FindAllExtensionNumbers(extendee_type, &results)) {
copy(results.begin(), results.end(),
insert_iterator<set<int> >(merged_results, merged_results.begin()));
success = true;
}
results.clear();
}
copy(merged_results.begin(), merged_results.end(),
insert_iterator<vector<int> >(*output, output->end()));
return success;
}
} // namespace protobuf
} // namespace google