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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.
#ifndef GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__
#define GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__
#include <string>
#include <google/protobuf/io/coded_stream.h>
#include <google/protobuf/arena.h>
#include <google/protobuf/message_lite.h>
#include <google/protobuf/port_def.inc>
#ifdef SWIG
#error "You cannot SWIG proto headers"
#endif
// This file is logically internal-only and should only be used by protobuf
// generated code.
namespace google {
namespace protobuf {
namespace internal {
// An implementation of MessageLite that treats all data as unknown. This type
// acts as a placeholder for an implicit weak field in the case where the true
// message type does not get linked into the binary.
class PROTOBUF_EXPORT ImplicitWeakMessage : public MessageLite {
public:
ImplicitWeakMessage() : arena_(NULL) {}
explicit ImplicitWeakMessage(Arena* arena) : arena_(arena) {}
static const ImplicitWeakMessage* default_instance();
std::string GetTypeName() const override { return ""; }
MessageLite* New() const override { return new ImplicitWeakMessage; }
MessageLite* New(Arena* arena) const override {
return Arena::CreateMessage<ImplicitWeakMessage>(arena);
}
Arena* GetArena() const override { return arena_; }
void Clear() override { data_.clear(); }
bool IsInitialized() const override { return true; }
void CheckTypeAndMergeFrom(const MessageLite& other) override {
data_.append(static_cast<const ImplicitWeakMessage&>(other).data_);
}
bool MergePartialFromCodedStream(io::CodedInputStream* input) override;
#if GOOGLE_PROTOBUF_ENABLE_EXPERIMENTAL_PARSER
ParseFunc _ParseFunc() const override { return _InternalParse; }
static const char* _InternalParse(const char* begin, const char* end,
void* object, ParseContext* ctx);
#endif
size_t ByteSizeLong() const override { return data_.size(); }
void SerializeWithCachedSizes(io::CodedOutputStream* output) const override {
output->WriteString(data_);
}
int GetCachedSize() const override { return static_cast<int>(data_.size()); }
typedef void InternalArenaConstructable_;
private:
Arena* const arena_;
std::string data_;
GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ImplicitWeakMessage);
};
// A type handler for use with implicit weak repeated message fields.
template <typename ImplicitWeakType>
class ImplicitWeakTypeHandler {
public:
typedef ImplicitWeakType Type;
typedef MessageLite WeakType;
static const bool Moveable = false;
// With implicit weak fields, we need separate NewFromPrototype and
// NewFromPrototypeWeak functions. The former is used when we want to create a
// strong dependency on the message type, and it just delegates to the
// GenericTypeHandler. The latter avoids creating a strong dependency, by
// simply calling MessageLite::New.
static inline MessageLite* NewFromPrototype(const MessageLite* prototype,
Arena* arena = NULL) {
return prototype->New(arena);
}
static inline void Delete(MessageLite* value, Arena* arena) {
if (arena == NULL) {
delete value;
}
}
static inline Arena* GetArena(MessageLite* value) {
return value->GetArena();
}
static inline void* GetMaybeArenaPointer(MessageLite* value) {
return value->GetArena();
}
static inline void Clear(MessageLite* value) { value->Clear(); }
static void Merge(const MessageLite& from, MessageLite* to) {
to->CheckTypeAndMergeFrom(from);
}
static inline size_t SpaceUsedLong(const Type& value) {
return value.SpaceUsedLong();
}
};
} // namespace internal
} // namespace protobuf
} // namespace google
#include <google/protobuf/port_undef.inc>
#endif // GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__
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