transmission/libtransmission/bencode.h

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/******************************************************************************
* $Id$
*
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* Copyright (c) 2005-2007 Transmission authors and contributors
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*
* 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
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#include <inttypes.h> /* for int64_t */
#include <string.h> /* for memset */
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typedef struct benc_val_s
{
char * begin;
char * end;
#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;
char * s;
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int nofree;
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} s;
struct
{
int alloc;
int count;
struct benc_val_s * vals;
} l;
} val;
} benc_val_t;
#define tr_bencLoad(b,l,v,e) _tr_bencLoad((char*)(b),(l),(v),(char**)(e))
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int _tr_bencLoad( char * buf, int len, benc_val_t * val,
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char ** end );
void tr_bencPrint( benc_val_t * val );
void tr_bencFree( benc_val_t * val );
benc_val_t * tr_bencDictFind( benc_val_t * val, const char * key );
benc_val_t * tr_bencDictFindFirst( benc_val_t * val, ... );
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/* marks a string as 'do not free' and returns it */
char * tr_bencStealStr( benc_val_t * val );
/* convenience functions for building benc_val_t structures */
static inline void tr_bencInit( benc_val_t * 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( benc_val_t * val, char * str, int len, int nofree );
int tr_bencInitStrDup( benc_val_t * val, const char * str );
void tr_bencInitInt( benc_val_t * val, int64_t num );
int tr_bencListReserve( benc_val_t * list, int count );
/* note that for one key-value pair, count should be 1, not 2 */
int tr_bencDictReserve( benc_val_t * dict, int count );
benc_val_t * tr_bencListAdd( benc_val_t * list );
/* note: key must not be freed or modified while val is in use */
benc_val_t * tr_bencDictAdd( benc_val_t * dict, const char * key );
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char * tr_bencSaveMalloc( benc_val_t * val, int * len );
int tr_bencSave( benc_val_t * val, char ** buf,
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int * used, int * max );
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int tr_bencIsStr ( const benc_val_t * val );
int tr_bencIsInt ( const benc_val_t * val );
int tr_bencIsList ( const benc_val_t * val );
int tr_bencIsDict ( const benc_val_t * val );
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#endif