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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.
+//
+// Contains methods defined in extension_set.h which cannot be part of the
+// lite library because they use descriptors or reflection.
+
+#include <stubs/casts.h>
+#include <descriptor.pb.h>
+#include <extension_set_inl.h>
+#include <parse_context.h>
+#include <io/coded_stream.h>
+#include <arena.h>
+#include <descriptor.h>
+#include <extension_set.h>
+#include <message.h>
+#include <message_lite.h>
+#include <repeated_field.h>
+#include <unknown_field_set.h>
+#include <wire_format.h>
+#include <wire_format_lite.h>
+
+
+#include <port_def.inc>
+
+namespace google {
+namespace protobuf {
+namespace internal {
+
+// A FieldSkipper used to store unknown MessageSet fields into UnknownFieldSet.
+class MessageSetFieldSkipper : public UnknownFieldSetFieldSkipper {
+ public:
+ explicit MessageSetFieldSkipper(UnknownFieldSet* unknown_fields)
+ : UnknownFieldSetFieldSkipper(unknown_fields) {}
+ ~MessageSetFieldSkipper() override {}
+
+ virtual bool SkipMessageSetField(io::CodedInputStream* input,
+ int field_number);
+};
+bool MessageSetFieldSkipper::SkipMessageSetField(io::CodedInputStream* input,
+ int field_number) {
+ uint32_t length;
+ if (!input->ReadVarint32(&length)) return false;
+ if (unknown_fields_ == nullptr) {
+ return input->Skip(length);
+ } else {
+ return input->ReadString(unknown_fields_->AddLengthDelimited(field_number),
+ length);
+ }
+}
+
+
+// Implementation of ExtensionFinder which finds extensions in a given
+// DescriptorPool, using the given MessageFactory to construct sub-objects.
+// This class is implemented in extension_set_heavy.cc.
+class DescriptorPoolExtensionFinder : public ExtensionFinder {
+ public:
+ DescriptorPoolExtensionFinder(const DescriptorPool* pool,
+ MessageFactory* factory,
+ const Descriptor* containing_type)
+ : pool_(pool), factory_(factory), containing_type_(containing_type) {}
+ ~DescriptorPoolExtensionFinder() override {}
+
+ bool Find(int number, ExtensionInfo* output) override;
+
+ private:
+ const DescriptorPool* pool_;
+ MessageFactory* factory_;
+ const Descriptor* containing_type_;
+};
+
+void ExtensionSet::AppendToList(
+ const Descriptor* containing_type, const DescriptorPool* pool,
+ std::vector<const FieldDescriptor*>* output) const {
+ ForEach([containing_type, pool, &output](int number, const Extension& ext) {
+ bool has = false;
+ if (ext.is_repeated) {
+ has = ext.GetSize() > 0;
+ } else {
+ has = !ext.is_cleared;
+ }
+
+ if (has) {
+ // TODO(kenton): Looking up each field by number is somewhat unfortunate.
+ // Is there a better way? The problem is that descriptors are lazily-
+ // initialized, so they might not even be constructed until
+ // AppendToList() is called.
+
+ if (ext.descriptor == nullptr) {
+ output->push_back(pool->FindExtensionByNumber(containing_type, number));
+ } else {
+ output->push_back(ext.descriptor);
+ }
+ }
+ });
+}
+
+inline FieldDescriptor::Type real_type(FieldType type) {
+ GOOGLE_DCHECK(type > 0 && type <= FieldDescriptor::MAX_TYPE);
+ return static_cast<FieldDescriptor::Type>(type);
+}
+
+inline FieldDescriptor::CppType cpp_type(FieldType type) {
+ return FieldDescriptor::TypeToCppType(
+ static_cast<FieldDescriptor::Type>(type));
+}
+
+inline WireFormatLite::FieldType field_type(FieldType type) {
+ GOOGLE_DCHECK(type > 0 && type <= WireFormatLite::MAX_FIELD_TYPE);
+ return static_cast<WireFormatLite::FieldType>(type);
+}
+
+#define GOOGLE_DCHECK_TYPE(EXTENSION, LABEL, CPPTYPE) \
+ GOOGLE_DCHECK_EQ((EXTENSION).is_repeated ? FieldDescriptor::LABEL_REPEATED \
+ : FieldDescriptor::LABEL_OPTIONAL, \
+ FieldDescriptor::LABEL_##LABEL); \
+ GOOGLE_DCHECK_EQ(cpp_type((EXTENSION).type), FieldDescriptor::CPPTYPE_##CPPTYPE)
+
+const MessageLite& ExtensionSet::GetMessage(int number,
+ const Descriptor* message_type,
+ MessageFactory* factory) const {
+ const Extension* extension = FindOrNull(number);
+ if (extension == nullptr || extension->is_cleared) {
+ // Not present. Return the default value.
+ return *factory->GetPrototype(message_type);
+ } else {
+ GOOGLE_DCHECK_TYPE(*extension, OPTIONAL, MESSAGE);
+ if (extension->is_lazy) {
+ return extension->lazymessage_value->GetMessage(
+ *factory->GetPrototype(message_type), arena_);
+ } else {
+ return *extension->message_value;
+ }
+ }
+}
+
+MessageLite* ExtensionSet::MutableMessage(const FieldDescriptor* descriptor,
+ MessageFactory* factory) {
+ Extension* extension;
+ if (MaybeNewExtension(descriptor->number(), descriptor, &extension)) {
+ extension->type = descriptor->type();
+ GOOGLE_DCHECK_EQ(cpp_type(extension->type), FieldDescriptor::CPPTYPE_MESSAGE);
+ extension->is_repeated = false;
+ extension->is_packed = false;
+ const MessageLite* prototype =
+ factory->GetPrototype(descriptor->message_type());
+ extension->is_lazy = false;
+ extension->message_value = prototype->New(arena_);
+ extension->is_cleared = false;
+ return extension->message_value;
+ } else {
+ GOOGLE_DCHECK_TYPE(*extension, OPTIONAL, MESSAGE);
+ extension->is_cleared = false;
+ if (extension->is_lazy) {
+ return extension->lazymessage_value->MutableMessage(
+ *factory->GetPrototype(descriptor->message_type()), arena_);
+ } else {
+ return extension->message_value;
+ }
+ }
+}
+
+MessageLite* ExtensionSet::ReleaseMessage(const FieldDescriptor* descriptor,
+ MessageFactory* factory) {
+ Extension* extension = FindOrNull(descriptor->number());
+ if (extension == nullptr) {
+ // Not present. Return nullptr.
+ return nullptr;
+ } else {
+ GOOGLE_DCHECK_TYPE(*extension, OPTIONAL, MESSAGE);
+ MessageLite* ret = nullptr;
+ if (extension->is_lazy) {
+ ret = extension->lazymessage_value->ReleaseMessage(
+ *factory->GetPrototype(descriptor->message_type()), arena_);
+ if (arena_ == nullptr) {
+ delete extension->lazymessage_value;
+ }
+ } else {
+ if (arena_ != nullptr) {
+ ret = extension->message_value->New();
+ ret->CheckTypeAndMergeFrom(*extension->message_value);
+ } else {
+ ret = extension->message_value;
+ }
+ }
+ Erase(descriptor->number());
+ return ret;
+ }
+}
+
+MessageLite* ExtensionSet::UnsafeArenaReleaseMessage(
+ const FieldDescriptor* descriptor, MessageFactory* factory) {
+ Extension* extension = FindOrNull(descriptor->number());
+ if (extension == nullptr) {
+ // Not present. Return nullptr.
+ return nullptr;
+ } else {
+ GOOGLE_DCHECK_TYPE(*extension, OPTIONAL, MESSAGE);
+ MessageLite* ret = nullptr;
+ if (extension->is_lazy) {
+ ret = extension->lazymessage_value->UnsafeArenaReleaseMessage(
+ *factory->GetPrototype(descriptor->message_type()), arena_);
+ if (arena_ == nullptr) {
+ delete extension->lazymessage_value;
+ }
+ } else {
+ ret = extension->message_value;
+ }
+ Erase(descriptor->number());
+ return ret;
+ }
+}
+
+ExtensionSet::Extension* ExtensionSet::MaybeNewRepeatedExtension(
+ const FieldDescriptor* descriptor) {
+ Extension* extension;
+ if (MaybeNewExtension(descriptor->number(), descriptor, &extension)) {
+ extension->type = descriptor->type();
+ GOOGLE_DCHECK_EQ(cpp_type(extension->type), FieldDescriptor::CPPTYPE_MESSAGE);
+ extension->is_repeated = true;
+ extension->repeated_message_value =
+ Arena::CreateMessage<RepeatedPtrField<MessageLite> >(arena_);
+ } else {
+ GOOGLE_DCHECK_TYPE(*extension, REPEATED, MESSAGE);
+ }
+ return extension;
+}
+
+MessageLite* ExtensionSet::AddMessage(const FieldDescriptor* descriptor,
+ MessageFactory* factory) {
+ Extension* extension = MaybeNewRepeatedExtension(descriptor);
+
+ // RepeatedPtrField<Message> does not know how to Add() since it cannot
+ // allocate an abstract object, so we have to be tricky.
+ MessageLite* result =
+ reinterpret_cast<internal::RepeatedPtrFieldBase*>(
+ extension->repeated_message_value)
+ ->AddFromCleared<GenericTypeHandler<MessageLite> >();
+ if (result == nullptr) {
+ const MessageLite* prototype;
+ if (extension->repeated_message_value->empty()) {
+ prototype = factory->GetPrototype(descriptor->message_type());
+ GOOGLE_CHECK(prototype != nullptr);
+ } else {
+ prototype = &extension->repeated_message_value->Get(0);
+ }
+ result = prototype->New(arena_);
+ extension->repeated_message_value->AddAllocated(result);
+ }
+ return result;
+}
+
+void ExtensionSet::AddAllocatedMessage(const FieldDescriptor* descriptor,
+ MessageLite* new_entry) {
+ Extension* extension = MaybeNewRepeatedExtension(descriptor);
+
+ extension->repeated_message_value->AddAllocated(new_entry);
+}
+
+void ExtensionSet::UnsafeArenaAddAllocatedMessage(
+ const FieldDescriptor* descriptor, MessageLite* new_entry) {
+ Extension* extension = MaybeNewRepeatedExtension(descriptor);
+
+ extension->repeated_message_value->UnsafeArenaAddAllocated(new_entry);
+}
+
+static bool ValidateEnumUsingDescriptor(const void* arg, int number) {
+ return reinterpret_cast<const EnumDescriptor*>(arg)->FindValueByNumber(
+ number) != nullptr;
+}
+
+bool DescriptorPoolExtensionFinder::Find(int number, ExtensionInfo* output) {
+ const FieldDescriptor* extension =
+ pool_->FindExtensionByNumber(containing_type_, number);
+ if (extension == nullptr) {
+ return false;
+ } else {
+ output->type = extension->type();
+ output->is_repeated = extension->is_repeated();
+ output->is_packed = extension->options().packed();
+ output->descriptor = extension;
+ if (extension->cpp_type() == FieldDescriptor::CPPTYPE_MESSAGE) {
+ output->message_info.prototype =
+ factory_->GetPrototype(extension->message_type());
+ GOOGLE_CHECK(output->message_info.prototype != nullptr)
+ << "Extension factory's GetPrototype() returned nullptr; extension: "
+ << extension->full_name();
+ } else if (extension->cpp_type() == FieldDescriptor::CPPTYPE_ENUM) {
+ output->enum_validity_check.func = ValidateEnumUsingDescriptor;
+ output->enum_validity_check.arg = extension->enum_type();
+ }
+
+ return true;
+ }
+}
+
+
+bool ExtensionSet::FindExtension(int wire_type, uint32_t field,
+ const Message* containing_type,
+ const internal::ParseContext* ctx,
+ ExtensionInfo* extension,
+ bool* was_packed_on_wire) {
+ if (ctx->data().pool == nullptr) {
+ GeneratedExtensionFinder finder(containing_type);
+ if (!FindExtensionInfoFromFieldNumber(wire_type, field, &finder, extension,
+ was_packed_on_wire)) {
+ return false;
+ }
+ } else {
+ DescriptorPoolExtensionFinder finder(ctx->data().pool, ctx->data().factory,
+ containing_type->GetDescriptor());
+ if (!FindExtensionInfoFromFieldNumber(wire_type, field, &finder, extension,
+ was_packed_on_wire)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+const char* ExtensionSet::ParseField(uint64_t tag, const char* ptr,
+ const Message* containing_type,
+ internal::InternalMetadata* metadata,
+ internal::ParseContext* ctx) {
+ int number = tag >> 3;
+ bool was_packed_on_wire;
+ ExtensionInfo extension;
+ if (!FindExtension(tag & 7, number, containing_type, ctx, &extension,
+ &was_packed_on_wire)) {
+ return UnknownFieldParse(
+ tag, metadata->mutable_unknown_fields<UnknownFieldSet>(), ptr, ctx);
+ }
+ return ParseFieldWithExtensionInfo<UnknownFieldSet>(
+ number, was_packed_on_wire, extension, metadata, ptr, ctx);
+}
+
+const char* ExtensionSet::ParseFieldMaybeLazily(
+ uint64_t tag, const char* ptr, const Message* containing_type,
+ internal::InternalMetadata* metadata, internal::ParseContext* ctx) {
+ return ParseField(tag, ptr, containing_type, metadata, ctx);
+}
+
+const char* ExtensionSet::ParseMessageSetItem(
+ const char* ptr, const Message* containing_type,
+ internal::InternalMetadata* metadata, internal::ParseContext* ctx) {
+ return ParseMessageSetItemTmpl<Message, UnknownFieldSet>(ptr, containing_type,
+ metadata, ctx);
+}
+
+bool ExtensionSet::ParseField(uint32_t tag, io::CodedInputStream* input,
+ const Message* containing_type,
+ UnknownFieldSet* unknown_fields) {
+ UnknownFieldSetFieldSkipper skipper(unknown_fields);
+ if (input->GetExtensionPool() == nullptr) {
+ GeneratedExtensionFinder finder(containing_type);
+ return ParseField(tag, input, &finder, &skipper);
+ } else {
+ DescriptorPoolExtensionFinder finder(input->GetExtensionPool(),
+ input->GetExtensionFactory(),
+ containing_type->GetDescriptor());
+ return ParseField(tag, input, &finder, &skipper);
+ }
+}
+
+bool ExtensionSet::ParseMessageSet(io::CodedInputStream* input,
+ const Message* containing_type,
+ UnknownFieldSet* unknown_fields) {
+ MessageSetFieldSkipper skipper(unknown_fields);
+ if (input->GetExtensionPool() == nullptr) {
+ GeneratedExtensionFinder finder(containing_type);
+ return ParseMessageSet(input, &finder, &skipper);
+ } else {
+ DescriptorPoolExtensionFinder finder(input->GetExtensionPool(),
+ input->GetExtensionFactory(),
+ containing_type->GetDescriptor());
+ return ParseMessageSet(input, &finder, &skipper);
+ }
+}
+
+int ExtensionSet::SpaceUsedExcludingSelf() const {
+ return internal::FromIntSize(SpaceUsedExcludingSelfLong());
+}
+
+size_t ExtensionSet::SpaceUsedExcludingSelfLong() const {
+ size_t total_size = Size() * sizeof(KeyValue);
+ ForEach([&total_size](int /* number */, const Extension& ext) {
+ total_size += ext.SpaceUsedExcludingSelfLong();
+ });
+ return total_size;
+}
+
+inline size_t ExtensionSet::RepeatedMessage_SpaceUsedExcludingSelfLong(
+ RepeatedPtrFieldBase* field) {
+ return field->SpaceUsedExcludingSelfLong<GenericTypeHandler<Message> >();
+}
+
+size_t ExtensionSet::Extension::SpaceUsedExcludingSelfLong() const {
+ size_t total_size = 0;
+ if (is_repeated) {
+ switch (cpp_type(type)) {
+#define HANDLE_TYPE(UPPERCASE, LOWERCASE) \
+ case FieldDescriptor::CPPTYPE_##UPPERCASE: \
+ total_size += sizeof(*repeated_##LOWERCASE##_value) + \
+ repeated_##LOWERCASE##_value->SpaceUsedExcludingSelfLong(); \
+ break
+
+ HANDLE_TYPE(INT32, int32_t);
+ HANDLE_TYPE(INT64, int64_t);
+ HANDLE_TYPE(UINT32, uint32_t);
+ HANDLE_TYPE(UINT64, uint64_t);
+ HANDLE_TYPE(FLOAT, float);
+ HANDLE_TYPE(DOUBLE, double);
+ HANDLE_TYPE(BOOL, bool);
+ HANDLE_TYPE(ENUM, enum);
+ HANDLE_TYPE(STRING, string);
+#undef HANDLE_TYPE
+
+ case FieldDescriptor::CPPTYPE_MESSAGE:
+ // repeated_message_value is actually a RepeatedPtrField<MessageLite>,
+ // but MessageLite has no SpaceUsedLong(), so we must directly call
+ // RepeatedPtrFieldBase::SpaceUsedExcludingSelfLong() with a different
+ // type handler.
+ total_size += sizeof(*repeated_message_value) +
+ RepeatedMessage_SpaceUsedExcludingSelfLong(
+ reinterpret_cast<internal::RepeatedPtrFieldBase*>(
+ repeated_message_value));
+ break;
+ }
+ } else {
+ switch (cpp_type(type)) {
+ case FieldDescriptor::CPPTYPE_STRING:
+ total_size += sizeof(*string_value) +
+ StringSpaceUsedExcludingSelfLong(*string_value);
+ break;
+ case FieldDescriptor::CPPTYPE_MESSAGE:
+ if (is_lazy) {
+ total_size += lazymessage_value->SpaceUsedLong();
+ } else {
+ total_size += down_cast<Message*>(message_value)->SpaceUsedLong();
+ }
+ break;
+ default:
+ // No extra storage costs for primitive types.
+ break;
+ }
+ }
+ return total_size;
+}
+
+uint8_t* ExtensionSet::SerializeMessageSetWithCachedSizesToArray(
+ const MessageLite* extendee, uint8_t* target) const {
+ io::EpsCopyOutputStream stream(
+ target, MessageSetByteSize(),
+ io::CodedOutputStream::IsDefaultSerializationDeterministic());
+ return InternalSerializeMessageSetWithCachedSizesToArray(extendee, target,
+ &stream);
+}
+
+bool ExtensionSet::ParseFieldMaybeLazily(
+ int wire_type, int field_number, io::CodedInputStream* input,
+ ExtensionFinder* extension_finder, MessageSetFieldSkipper* field_skipper) {
+ return ParseField(
+ WireFormatLite::MakeTag(field_number,
+ static_cast<WireFormatLite::WireType>(wire_type)),
+ input, extension_finder, field_skipper);
+}
+
+bool ExtensionSet::ParseMessageSet(io::CodedInputStream* input,
+ ExtensionFinder* extension_finder,
+ MessageSetFieldSkipper* field_skipper) {
+ while (true) {
+ const uint32_t tag = input->ReadTag();
+ switch (tag) {
+ case 0:
+ return true;
+ case WireFormatLite::kMessageSetItemStartTag:
+ if (!ParseMessageSetItem(input, extension_finder, field_skipper)) {
+ return false;
+ }
+ break;
+ default:
+ if (!ParseField(tag, input, extension_finder, field_skipper)) {
+ return false;
+ }
+ break;
+ }
+ }
+}
+
+bool ExtensionSet::ParseMessageSetItem(io::CodedInputStream* input,
+ ExtensionFinder* extension_finder,
+ MessageSetFieldSkipper* field_skipper) {
+ struct MSFull {
+ bool ParseField(int type_id, io::CodedInputStream* input) {
+ return me->ParseFieldMaybeLazily(
+ WireFormatLite::WIRETYPE_LENGTH_DELIMITED, type_id, input,
+ extension_finder, field_skipper);
+ }
+
+ bool SkipField(uint32_t tag, io::CodedInputStream* input) {
+ return field_skipper->SkipField(input, tag);
+ }
+
+ ExtensionSet* me;
+ ExtensionFinder* extension_finder;
+ MessageSetFieldSkipper* field_skipper;
+ };
+
+ return ParseMessageSetItemImpl(input,
+ MSFull{this, extension_finder, field_skipper});
+}
+
+} // namespace internal
+} // namespace protobuf
+} // namespace google
+
+#include <port_undef.inc>