Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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95 lines
2.6 KiB
95 lines
2.6 KiB
/* |
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* upb - a minimalist implementation of protocol buffers. |
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* |
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* Copyright (c) 2009-2010 Google Inc. See LICENSE for details. |
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* Author: Josh Haberman <jhaberman@gmail.com> |
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* |
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* Implements a set of upb_handlers that write protobuf data to the binary wire |
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* format. |
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* |
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* This encoder implementation does not have any access to any out-of-band or |
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* precomputed lengths for submessages, so it must buffer submessages internally |
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* before it can emit the first byte. |
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*/ |
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#ifndef UPB_ENCODER_H_ |
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#define UPB_ENCODER_H_ |
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#include "upb/env.h" |
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#include "upb/sink.h" |
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#ifdef __cplusplus |
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namespace upb { |
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namespace pb { |
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class Encoder; |
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} /* namespace pb */ |
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} /* namespace upb */ |
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#endif |
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UPB_DECLARE_TYPE(upb::pb::Encoder, upb_pb_encoder) |
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#define UPB_PBENCODER_MAX_NESTING 100 |
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/* upb::pb::Encoder ***********************************************************/ |
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/* Preallocation hint: decoder won't allocate more bytes than this when first |
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* constructed. This hint may be an overestimate for some build configurations. |
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* But if the decoder library is upgraded without recompiling the application, |
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* it may be an underestimate. */ |
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#define UPB_PB_ENCODER_SIZE 768 |
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#ifdef __cplusplus |
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class upb::pb::Encoder { |
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public: |
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/* Creates a new encoder in the given environment. The Handlers must have |
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* come from NewHandlers() below. */ |
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static Encoder* Create(Environment* env, const Handlers* handlers, |
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BytesSink* output); |
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/* The input to the encoder. */ |
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Sink* input(); |
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/* Creates a new set of handlers for this MessageDef. */ |
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static reffed_ptr<const Handlers> NewHandlers(const MessageDef* msg); |
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static const size_t kSize = UPB_PB_ENCODER_SIZE; |
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private: |
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UPB_DISALLOW_POD_OPS(Encoder, upb::pb::Encoder) |
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}; |
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#endif |
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UPB_BEGIN_EXTERN_C |
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const upb_handlers *upb_pb_encoder_newhandlers(const upb_msgdef *m, |
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const void *owner); |
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upb_sink *upb_pb_encoder_input(upb_pb_encoder *p); |
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upb_pb_encoder* upb_pb_encoder_create(upb_env* e, const upb_handlers* h, |
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upb_bytessink* output); |
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UPB_END_EXTERN_C |
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#ifdef __cplusplus |
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namespace upb { |
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namespace pb { |
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inline Encoder* Encoder::Create(Environment* env, const Handlers* handlers, |
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BytesSink* output) { |
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return upb_pb_encoder_create(env, handlers, output); |
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} |
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inline Sink* Encoder::input() { |
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return upb_pb_encoder_input(this); |
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} |
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inline reffed_ptr<const Handlers> Encoder::NewHandlers( |
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const upb::MessageDef *md) { |
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const Handlers* h = upb_pb_encoder_newhandlers(md, &h); |
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return reffed_ptr<const Handlers>(h, &h); |
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} |
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} /* namespace pb */ |
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} /* namespace upb */ |
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#endif |
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#endif /* UPB_ENCODER_H_ */
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