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/*
** 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/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 {
upb_fieldtype_t type;
void *data; /* Each element is element_size. */
size_t len; /* Measured in elements. */
size_t size; /* Measured in elements. */
upb_arena *arena;
} upb_array;
upb_msg *upb_msg_new(const upb_msglayout *l, upb_arena *a);
upb_msg *upb_msg_new(const upb_msglayout *l, upb_arena *a);
/* Returns the arena for the given message. */
upb_arena *upb_msg_arena(const upb_msg *msg);
void upb_msg_addunknown(upb_msg *msg, const char *data, size_t len);
const char *upb_msg_getunknown(const upb_msg *msg, size_t *len);
upb_array *upb_array_new(upb_fieldtype_t type, upb_arena *a);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* UPB_MSG_H_ */
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