| // 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 <google/protobuf/io/coded_stream.h> |
| #include <google/protobuf/arena.h> |
| #include <google/protobuf/message_lite.h> |
| |
| // 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 LIBPROTOBUF_EXPORT ImplicitWeakMessage : public MessageLite { |
| public: |
| ImplicitWeakMessage() : arena_(NULL) {} |
| explicit ImplicitWeakMessage(Arena* arena) : arena_(arena) {} |
| |
| static const ImplicitWeakMessage* default_instance(); |
| |
| string GetTypeName() const { return ""; } |
| |
| MessageLite* New() const { return new ImplicitWeakMessage; } |
| MessageLite* New(Arena* arena) const { |
| return Arena::CreateMessage<ImplicitWeakMessage>(arena); |
| } |
| |
| Arena* GetArena() const { return arena_; } |
| |
| void Clear() { data_.clear(); } |
| |
| bool IsInitialized() const { return true; } |
| |
| void CheckTypeAndMergeFrom(const MessageLite& other) { |
| data_.append(static_cast<const ImplicitWeakMessage&>(other).data_); |
| } |
| |
| bool MergePartialFromCodedStream(io::CodedInputStream* input); |
| |
| size_t ByteSizeLong() const { return data_.size(); } |
| |
| void SerializeWithCachedSizes(io::CodedOutputStream* output) const { |
| output->WriteString(data_); |
| } |
| |
| int GetCachedSize() const { return static_cast<int>(data_.size()); } |
| |
| typedef void InternalArenaConstructable_; |
| |
| private: |
| Arena* const arena_; |
| 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 ::google::protobuf::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 ::google::protobuf::MessageLite* NewFromPrototype( |
| const ::google::protobuf::MessageLite* prototype, ::google::protobuf::Arena* arena = NULL) { |
| return prototype->New(arena); |
| } |
| |
| static inline void Delete(::google::protobuf::MessageLite* value, Arena* arena) { |
| if (arena == NULL) { |
| delete value; |
| } |
| } |
| static inline ::google::protobuf::Arena* GetArena(::google::protobuf::MessageLite* value) { |
| return value->GetArena(); |
| } |
| static inline void* GetMaybeArenaPointer(::google::protobuf::MessageLite* value) { |
| return value->GetArena(); |
| } |
| static inline void Clear(::google::protobuf::MessageLite* value) { |
| value->Clear(); |
| } |
| static void Merge(const ::google::protobuf::MessageLite& from, |
| ::google::protobuf::MessageLite* to) { |
| to->CheckTypeAndMergeFrom(from); |
| } |
| static inline size_t SpaceUsedLong(const Type& value) { |
| return value.SpaceUsedLong(); |
| } |
| }; |
| |
| } // namespace internal |
| } // namespace protobuf |
| |
| } // namespace google |
| #endif // GOOGLE_PROTOBUF_IMPLICIT_WEAK_MESSAGE_H__ |