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git-svn-id: https://svn.kapsi.fi/jpa/nanopb@951 e3a754e5-d11d-0410-8d38-ebb782a927b9
This commit is contained in:
Petteri Aimonen
2011-08-04 16:49:32 +00:00
parent 3959290bc7
commit a8d0172507
10 changed files with 583 additions and 104 deletions
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36
pb_decode.h
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@@ -1,18 +1,32 @@
#ifndef _PB_DECODE_H_
#define _PB_DECODE_H_
/* pb_decode.h: Functions to decode protocol buffers. Depends on pb_decode.c.
* The main function is pb_decode. You will also need to create an input
* stream, which is easiest to do with pb_istream_t.
*
* You also need structures and their corresponding pb_field_t descriptions.
* These are usually generated from .proto-files with a script.
*/
#include <stdbool.h>
#include "pb.h"
/* Lightweight input stream.
* If buf is NULL, read but don't store bytes.
* You can to provide a callback function for reading or use
* You can provide a callback function for reading or use
* pb_istream_from_buffer.
*
* You can use state to store your own data (e.g. buffer pointer),
* Rules for callback:
* 1) Return false on IO errors. This will cause decoding to abort.
*
* 2) If buf is NULL, read but don't store bytes ("skip input").
*
* 3) You can use state to store your own data (e.g. buffer pointer),
* and rely on pb_read to verify that no-body reads past bytes_left.
* However, substreams may change bytes_left so don't use that to
* compute any pointers.
*
* 4) Your callback may be used with substreams, in which case bytes_left
* is different than from the main stream. Don't use bytes_left to compute
* any pointers.
*/
struct _pb_istream_t
{
@@ -25,6 +39,7 @@ pb_istream_t pb_istream_from_buffer(uint8_t *buf, size_t bufsize);
bool pb_read(pb_istream_t *stream, uint8_t *buf, size_t count);
/* Decode from stream to destination struct.
* Returns true on success, false on any failure.
* The actual struct pointed to by dest must match the description in fields.
*/
bool pb_decode(pb_istream_t *stream, const pb_field_t fields[], void *dest_struct);
@@ -49,15 +64,8 @@ bool pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest);
bool pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest);
bool pb_dec_fixed(pb_istream_t *stream, const pb_field_t *field, void *dest);
bool pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, uint8_t *dest);
bool pb_dec_string(pb_istream_t *stream, const pb_field_t *field, uint8_t *dest);
bool pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest);
bool pb_dec_string(pb_istream_t *stream, const pb_field_t *field, void *dest);
bool pb_dec_submessage(pb_istream_t *stream, const pb_field_t *field, void *dest);
typedef bool (*pb_decoder_t)(pb_istream_t *stream, const pb_field_t *field, void *dest);
/* --- Function pointers to field decoders ---
* Order in the array must match pb_action_t LTYPE numbering.
*/
const pb_decoder_t PB_DECODERS[PB_LTYPES_COUNT];
#endif