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/*
* upb - a minimalist implementation of protocol buffers.
*
* Copyright (c) 2009 Joshua Haberman. See LICENSE for details.
*/
#ifndef UPB_H_
#define UPB_H_
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h> /* for size_t. */
#ifdef __cplusplus
extern "C" {
#endif
/* The maximum that any submessages can be nested. Matches proto2's limit. */
#define UPB_MAX_NESTING 64
/* A list of types as they are encoded on-the-wire. */
typedef enum upb_wire_type {
UPB_WIRE_TYPE_VARINT = 0,
UPB_WIRE_TYPE_64BIT = 1,
UPB_WIRE_TYPE_DELIMITED = 2,
UPB_WIRE_TYPE_START_GROUP = 3,
UPB_WIRE_TYPE_END_GROUP = 4,
UPB_WIRE_TYPE_32BIT = 5,
} upb_wire_type_t;
struct upb_delimited {
size_t offset; /* relative to the beginning of the stream. */
uint32_t len;
};
/* A value as it is encoded on-the-wire. */
union upb_wire_value {
uint64_t varint;
uint64_t _64bit;
uint32_t _32bit;
struct upb_delimited delimited;
};
/* A value as described in a .proto file. */
union upb_value {
double _double;
float _float;
int32_t int32;
int64_t int64;
uint32_t uint32;
uint64_t uint64;
bool _bool;
struct upb_delimited delimited;
};
typedef int32_t upb_field_number_t;
/* A tag occurs before each value on-the-wire. */
struct upb_tag {
upb_field_number_t field_number;
upb_wire_type_t wire_type;
};
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* UPB_H_ */
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