Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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89 lines
2.7 KiB
89 lines
2.7 KiB
/* |
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* upb - a minimalist implementation of protocol buffers. |
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* |
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* Copyright (c) 2011 Google Inc. See LICENSE for details. |
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* Author: Josh Haberman <jhaberman@gmail.com> |
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* |
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* upb::descriptor::Reader provides a way of building upb::Defs from |
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* data in descriptor.proto format. |
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*/ |
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#ifndef UPB_DESCRIPTOR_H |
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#define UPB_DESCRIPTOR_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 descriptor { |
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class Reader; |
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} /* namespace descriptor */ |
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} /* namespace upb */ |
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#endif |
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UPB_DECLARE_TYPE(upb::descriptor::Reader, upb_descreader) |
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#ifdef __cplusplus |
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/* Class that receives descriptor data according to the descriptor.proto schema |
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* and use it to build upb::Defs corresponding to that schema. */ |
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class upb::descriptor::Reader { |
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public: |
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/* These handlers must have come from NewHandlers() and must outlive the |
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* Reader. |
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* |
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* TODO: generate the handlers statically (like we do with the |
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* descriptor.proto defs) so that there is no need to pass this parameter (or |
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* to build/memory-manage the handlers at runtime at all). Unfortunately this |
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* is a bit tricky to implement for Handlers, but necessary to simplify this |
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* interface. */ |
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static Reader* Create(Environment* env, const Handlers* handlers); |
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/* The reader's input; this is where descriptor.proto data should be sent. */ |
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Sink* input(); |
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/* Returns an array of all defs that have been parsed, and transfers ownership |
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* of them to "owner". The number of defs is stored in *n. Ownership of the |
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* returned array is retained and is invalidated by any other call into |
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* Reader. |
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* |
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* These defs are not frozen or resolved; they are ready to be added to a |
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* symtab. */ |
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upb::Def** GetDefs(void* owner, int* n); |
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/* Builds and returns handlers for the reader, owned by "owner." */ |
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static Handlers* NewHandlers(const void* owner); |
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private: |
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UPB_DISALLOW_POD_OPS(Reader, upb::descriptor::Reader) |
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}; |
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#endif |
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UPB_BEGIN_EXTERN_C |
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/* C API. */ |
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upb_descreader *upb_descreader_create(upb_env *e, const upb_handlers *h); |
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upb_sink *upb_descreader_input(upb_descreader *r); |
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upb_def **upb_descreader_getdefs(upb_descreader *r, void *owner, int *n); |
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const upb_handlers *upb_descreader_newhandlers(const void *owner); |
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UPB_END_EXTERN_C |
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#ifdef __cplusplus |
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/* C++ implementation details. ************************************************/ |
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namespace upb { |
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namespace descriptor { |
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inline Reader* Reader::Create(Environment* e, const Handlers *h) { |
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return upb_descreader_create(e, h); |
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} |
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inline Sink* Reader::input() { return upb_descreader_input(this); } |
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inline upb::Def** Reader::GetDefs(void* owner, int* n) { |
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return upb_descreader_getdefs(this, owner, n); |
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} |
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} /* namespace descriptor */ |
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} /* namespace upb */ |
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#endif |
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#endif /* UPB_DESCRIPTOR_H */
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