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/*
* pbstream - a stream-oriented implementation of protocol buffers.
*
* Copyright (c) 2008 Joshua Haberman. See LICENSE for details.
*
* The structures and functions in this file offer more control than what is
* offered in pbstream.h. These can be used for more specialized/optimized
* parsing applications. */
#ifndef PBSTREAM_LOWLEVEL_H_
#define PBSTREAM_LOWLEVEL_H_
#include "pbstream.h"
#ifdef __cplusplus
extern "C" {
#endif
/* A tag occurs before each value on-the-wire. */
struct pbstream_tag {
pbstream_field_number_t field_number;
pbstream_wire_type_t wire_type;
};
/* Parses a single tag from the character data starting at buf, and updates
* buf to point one past the bytes that were consumed. */
pbstream_status_t parse_tag(uint8_t **buf, struct pbstream_tag *tag);
/* Parses a wire value with the given type (which must have been obtained from
* a tag that was just parsed) and updates buf to point to one past the bytes
* that were consumed. */
pbstream_status_t parse_wire_value(uint8_t **buf, size_t offset,
pbstream_wire_type_t wt,
union pbstream_wire_value *wv);
/* Like the above, but discards the wire value instead of saving it. */
pbstream_status_t skip_wire_value(uint8_t **buf, pbstream_wire_type_t wt);
/* Looks the given field number up in the fieldset, and returns the
* corresponding pbstream_field definition (or NULL if this field number
* does not exist in this fieldset). */
struct pbstream_field *pbstream_find_field(struct pbstream_fieldset *fs,
pbstream_field_number_t num);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* PBSTREAM_LOWLEVEL_H_ */
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