Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
77 lines
2.2 KiB
77 lines
2.2 KiB
/* |
|
** Data structures for message tables, used for parsing and serialization. |
|
** This are much lighter-weight than full reflection, but they are do not |
|
** have enough information to convert to text format, JSON, etc. |
|
** |
|
** The definitions in this file are internal to upb. |
|
**/ |
|
|
|
#ifndef UPB_MSG_H_ |
|
#define UPB_MSG_H_ |
|
|
|
#include <stdint.h> |
|
#include <string.h> |
|
|
|
#include "upb/table.int.h" |
|
#include "upb/upb.h" |
|
|
|
#ifdef __cplusplus |
|
extern "C" { |
|
#endif |
|
|
|
typedef void upb_msg; |
|
|
|
/** upb_msglayout *************************************************************/ |
|
|
|
/* upb_msglayout represents the memory layout of a given upb_msgdef. The |
|
* members are public so generated code can initialize them, but users MUST NOT |
|
* read or write any of its members. */ |
|
|
|
typedef struct { |
|
uint32_t number; |
|
uint16_t offset; |
|
int16_t presence; /* If >0, hasbit_index+1. If <0, oneof_index+1. */ |
|
uint16_t submsg_index; /* undefined if descriptortype != MESSAGE or GROUP. */ |
|
uint8_t descriptortype; |
|
uint8_t label; |
|
} upb_msglayout_field; |
|
|
|
typedef struct upb_msglayout { |
|
const struct upb_msglayout *const* submsgs; |
|
const upb_msglayout_field *fields; |
|
/* Must be aligned to sizeof(void*). Doesn't include internal members like |
|
* unknown fields, extension dict, pointer to msglayout, etc. */ |
|
uint16_t size; |
|
uint16_t field_count; |
|
bool extendable; |
|
} upb_msglayout; |
|
|
|
/** Message internal representation *******************************************/ |
|
|
|
/* Our internal representation for repeated fields. */ |
|
typedef struct { |
|
void *data; /* Each element is element_size. */ |
|
size_t len; /* Measured in elements. */ |
|
size_t size; /* Measured in elements. */ |
|
} upb_array; |
|
|
|
/* Our internal representation for maps. Right now we use strmaps for |
|
* everything. We'll likely want to use integer-specific maps for |
|
* integer-keyed maps.*/ |
|
typedef struct { |
|
upb_strtable table; |
|
} upb_map; |
|
|
|
upb_msg *upb_msg_new(const upb_msglayout *l, upb_arena *a); |
|
upb_array *upb_array_new(upb_arena *a); |
|
upb_map *upb_map_new(upb_arena *a); |
|
|
|
void upb_msg_addunknown(upb_msg *msg, const char *data, size_t len, |
|
upb_arena *arena); |
|
const char *upb_msg_getunknown(const upb_msg *msg, size_t *len); |
|
|
|
#ifdef __cplusplus |
|
} /* extern "C" */ |
|
#endif |
|
|
|
#endif /* UPB_MSG_H_ */
|
|
|