transmission/libtransmission/bencode.h

129 lines
4.2 KiB
C

/******************************************************************************
* $Id$
*
* Copyright (c) 2005-2008 Transmission authors and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#ifndef TR_BENCODE_H
#define TR_BENCODE_H 1
#include <inttypes.h> /* for int64_t */
#include <string.h> /* for memset */
typedef struct tr_benc
{
#define TYPE_INT 1
#define TYPE_STR 2
#define TYPE_LIST 4
#define TYPE_DICT 8
char type;
union
{
int64_t i;
struct
{
int i;
int nofree;
char * s;
} s;
struct
{
int alloc;
int count;
struct tr_benc * vals;
} l;
} val;
} tr_benc;
/* backwards compatability */
typedef tr_benc benc_val_t;
int tr_bencParse( const void * buf,
const void * bufend,
tr_benc * setme_benc,
const uint8_t ** setme_end );
int tr_bencLoad( const void * buf,
int buflen,
tr_benc * setme_benc,
char ** setme_end );
void tr_bencPrint( const tr_benc * );
void tr_bencFree( tr_benc * );
tr_benc * tr_bencDictFind( tr_benc * dict, const char * key );
tr_benc * tr_bencDictFindType( tr_benc * dict, const char * key, int type );
tr_benc * tr_bencDictFindFirst( tr_benc * dict, ... );
/* marks a string as 'do not free' and returns it */
char * tr_bencStealStr( tr_benc * val );
/* convenience functions for building tr_benc structures */
static inline void tr_bencInit( tr_benc * val, int type )
{
memset( val, 0, sizeof( *val ) );
val->type = type;
}
#define tr_bencInitStr( a, b, c, d ) \
_tr_bencInitStr( (a), ( char * )(b), (c), (d) )
void _tr_bencInitStr( tr_benc * val, char * str, int len, int nofree );
int tr_bencInitStrDup( tr_benc * val, const char * str );
void tr_bencInitInt( tr_benc * val, int64_t num );
int tr_bencListReserve( tr_benc * list, int count );
/* note that for one key-value pair, count should be 1, not 2 */
int tr_bencDictReserve( tr_benc * dict, int count );
tr_benc * tr_bencListAdd( tr_benc * list );
/* note: key must not be freed or modified while val is in use */
tr_benc * tr_bencDictAdd( tr_benc * dict, const char * key );
char* tr_bencSave( const tr_benc * val, int * len );
char* tr_bencSaveAsSerializedPHP( const tr_benc * top, int * len );
int64_t tr_bencGetInt( const tr_benc * val );
/**
*** Treat these as private -- they're only made public here
*** so that the unit tests can find them
**/
int tr_bencParseInt( const uint8_t * buf,
const uint8_t * bufend,
const uint8_t ** setme_end,
int64_t * setme_val );
int tr_bencParseStr( const uint8_t * buf,
const uint8_t * bufend,
const uint8_t ** setme_end,
uint8_t ** setme_str,
size_t * setme_strlen );
/**
***
**/
tr_benc * tr_bencListGetNthChild( tr_benc * list, int n );
#endif