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/*
* upb - a minimalist implementation of protocol buffers.
*
* upb_parse implements a high performance, callback-based, stream-oriented
* parser (comparable to the SAX model in XML parsers). For parsing protobufs
* into in-memory messages (a more DOM-like model), see the routines in
* upb_msg.h, which are layered on top of this parser.
*
* TODO: the parser currently does not support returning unknown values. This
* can easily be added when it is needed.
*
* Copyright (c) 2009 Joshua Haberman. See LICENSE for details.
*/
#ifndef UPB_PARSE_H_
#define UPB_PARSE_H_
#include <stdbool.h>
#include <stdint.h>
#include "upb.h"
#include "descriptor.h"
#ifdef __cplusplus
extern "C" {
#endif
/* upb_parser *****************************************************************/
// A upb_parser parses the binary protocol buffer format, writing the data it
// parses to a upb_sink.
struct upb_parser;
typedef struct upb_parser upb_parser;
// Allocates and frees a upb_parser, respectively.
upb_parser *upb_parser_new(struct upb_msgdef *md);
void upb_parser_free(upb_parser *p);
// Resets the internal state of an already-allocated parser. This puts it in a
// state where it has not seen any data, and expects the next data to be from
// the beginning of a new protobuf. Parsers must be reset before they can be
// used. A parser can be reset multiple times.
void upb_parser_reset(upb_parser *p, upb_sink *sink);
// Parses protobuf data out of str, returning how much data was parsed. The
// next call to upb_parser_parse should begin with the first byte that was
// not parsed. "status" indicates whether an error occurred.
//
// TODO: provide the following guarantee:
// retval will always be >= len. */
size_t upb_parser_parse(upb_parser *p, upb_strptr str,
struct upb_status *status);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* UPB_PARSE_H_ */
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