Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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77 lines
3.0 KiB
77 lines
3.0 KiB
/* |
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** upb's core components like upb_decoder and upb_msg are carefully designed to |
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** avoid depending on each other for maximum orthogonality. In other words, |
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** you can use a upb_decoder to decode into *any* kind of structure; upb_msg is |
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** just one such structure. A upb_msg can be serialized/deserialized into any |
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** format, protobuf binary format is just one such format. |
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** |
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** However, for convenience we provide functions here for doing common |
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** operations like deserializing protobuf binary format into a upb_msg. The |
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** compromise is that this file drags in almost all of upb as a dependency, |
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** which could be undesirable if you're trying to use a trimmed-down build of |
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** upb. |
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** |
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** While these routines are convenient, they do not reuse any encoding/decoding |
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** state. For example, if a decoder is JIT-based, it will be re-JITted every |
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** time these functions are called. For this reason, if you are parsing lots |
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** of data and efficiency is an issue, these may not be the best functions to |
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** use (though they are useful for prototyping, before optimizing). |
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*/ |
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#ifndef UPB_GLUE_H |
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#define UPB_GLUE_H |
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#include <stdbool.h> |
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#include "upb/symtab.h" |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* Loads all defs from the given protobuf binary descriptor, setting default |
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* accessors and a default layout on all messages. The caller owns the |
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* returned array of defs, which will be of length *n. On error NULL is |
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* returned and status is set (if non-NULL). */ |
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upb_def **upb_load_defs_from_descriptor(const char *str, size_t len, int *n, |
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void *owner, upb_status *status); |
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/* Like the previous but also adds the loaded defs to the given symtab. */ |
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bool upb_load_descriptor_into_symtab(upb_symtab *symtab, const char *str, |
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size_t len, upb_status *status); |
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/* Like the previous but also reads the descriptor from the given filename. */ |
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bool upb_load_descriptor_file_into_symtab(upb_symtab *symtab, const char *fname, |
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upb_status *status); |
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/* Reads the given filename into a character string, returning NULL if there |
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* was an error. */ |
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char *upb_readfile(const char *filename, size_t *len); |
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#ifdef __cplusplus |
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} /* extern "C" */ |
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namespace upb { |
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/* All routines that load descriptors expect the descriptor to be a |
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* FileDescriptorSet. */ |
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inline bool LoadDescriptorFileIntoSymtab(SymbolTable* s, const char *fname, |
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Status* status) { |
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return upb_load_descriptor_file_into_symtab(s, fname, status); |
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} |
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inline bool LoadDescriptorIntoSymtab(SymbolTable* s, const char* str, |
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size_t len, Status* status) { |
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return upb_load_descriptor_into_symtab(s, str, len, status); |
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} |
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/* Templated so it can accept both string and std::string. */ |
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template <typename T> |
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bool LoadDescriptorIntoSymtab(SymbolTable* s, const T& desc, Status* status) { |
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return upb_load_descriptor_into_symtab(s, desc.c_str(), desc.size(), status); |
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} |
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} /* namespace upb */ |
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#endif |
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#endif /* UPB_GLUE_H */
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