transmission/libtransmission/bencode.h

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/*
* This file Copyright (C) 2008-2009 Charles Kerr <charles@transmissionbt.com>
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*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
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*
* $Id$
*/
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#ifndef TR_BENCODE_H
#define TR_BENCODE_H 1
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#include <inttypes.h> /* for int64_t */
struct evbuffer;
enum
{
TYPE_INT = 1,
TYPE_STR = 2,
TYPE_LIST = 4,
TYPE_DICT = 8
};
typedef struct tr_benc
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{
char type;
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union
{
int64_t i;
struct
{
size_t i;
char * s;
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} s;
struct
{
size_t alloc;
size_t count;
struct tr_benc * vals;
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} l;
} val;
} tr_benc;
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#ifdef __cplusplus
extern "C" {
#endif
/***
****
***/
int tr_bencParse( const void * buf,
const void * bufend,
tr_benc * setme_benc,
const uint8_t ** setme_end );
int tr_bencLoad( const void * buf,
size_t buflen,
tr_benc * setme_benc,
char ** setme_end );
int tr_bencLoadFile( const char * filename,
tr_benc * );
int tr_bencLoadJSONFile( const char * filename,
tr_benc * );
#if 0
void tr_bencPrint( const tr_benc * );
#endif
void tr_bencFree( tr_benc * );
char* tr_bencSave( const tr_benc * val, int * len );
char* tr_bencSaveAsJSON( const tr_benc * top, struct evbuffer * out );
char* tr_bencToJSON( const tr_benc * top );
int tr_bencSaveFile( const char * filename, const tr_benc * );
int tr_bencSaveJSONFile( const char * filename, const tr_benc * );
void tr_bencInitStr( tr_benc *, const void * str, int str_len );
void tr_bencInitRaw( tr_benc *, const void * raw, size_t raw_len );
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void tr_bencInitInt( tr_benc *, int64_t num );
int tr_bencInitDict( tr_benc *, size_t reserveCount );
int tr_bencInitList( tr_benc *, size_t reserveCount );
/***
****
***/
int tr_bencListReserve( tr_benc *, size_t reserveCount );
tr_benc * tr_bencListAdd( tr_benc * );
tr_benc * tr_bencListAddInt( tr_benc *, int64_t val );
tr_benc * tr_bencListAddStr( tr_benc *, const char * val );
tr_benc * tr_bencListAddList( tr_benc *, size_t reserveCount );
tr_benc * tr_bencListAddDict( tr_benc *, size_t reserveCount );
size_t tr_bencListSize( const tr_benc * list );
tr_benc * tr_bencListChild( tr_benc * list, size_t n );
/***
****
***/
int tr_bencDictReserve( tr_benc *, size_t reserveCount );
int tr_bencDictRemove( tr_benc *, const char * key );
tr_benc * tr_bencDictAdd( tr_benc *, const char * key );
tr_benc * tr_bencDictAddReal( tr_benc *, const char * key, double );
tr_benc * tr_bencDictAddInt( tr_benc *, const char * key, int64_t );
tr_benc * tr_bencDictAddBool( tr_benc *, const char * key, tr_bool );
tr_benc * tr_bencDictAddStr( tr_benc *, const char * key, const char * );
tr_benc * tr_bencDictAddList( tr_benc *, const char * key, size_t reserve );
tr_benc * tr_bencDictAddDict( tr_benc *, const char * key, size_t reserve );
tr_benc * tr_bencDictAddRaw( tr_benc *, const char * key,
const void * raw, size_t rawlen );
tr_benc* tr_bencDictFind( tr_benc *, const char * key );
tr_bool tr_bencDictFindList( tr_benc *, const char * key, tr_benc ** setme );
tr_bool tr_bencDictFindDict( tr_benc *, const char * key, tr_benc ** setme );
tr_bool tr_bencDictFindInt( tr_benc *, const char * key, int64_t * setme );
tr_bool tr_bencDictFindReal( tr_benc *, const char * key, double * setme );
tr_bool tr_bencDictFindBool( tr_benc *, const char * key, tr_bool * setme );
tr_bool tr_bencDictFindStr( tr_benc *, const char * key, const char ** setme );
tr_bool tr_bencDictFindRaw( tr_benc *, const char * key,
const uint8_t ** setme_raw, size_t * setme_len );
/***
****
***/
tr_bool tr_bencGetInt( const tr_benc * val, int64_t * setme );
tr_bool tr_bencGetStr( const tr_benc * val, const char ** setme );
tr_bool tr_bencGetBool( const tr_benc * val, tr_bool * setme );
tr_bool tr_bencGetReal( const tr_benc * val, double * setme );
static TR_INLINE tr_bool tr_bencIsType ( const tr_benc * b, int type ) { return ( b != NULL ) && ( b->type == type ); }
static TR_INLINE tr_bool tr_bencIsInt ( const tr_benc * b ) { return tr_bencIsType( b, TYPE_INT ); }
static TR_INLINE tr_bool tr_bencIsDict ( const tr_benc * b ) { return tr_bencIsType( b, TYPE_DICT ); }
static TR_INLINE tr_bool tr_bencIsList ( const tr_benc * b ) { return tr_bencIsType( b, TYPE_LIST ); }
static TR_INLINE tr_bool tr_bencIsString( const tr_benc * b ) { return tr_bencIsType( b, TYPE_STR ); }
/**
*** 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,
const uint8_t ** setme_str,
size_t * setme_strlen );
/**
***
**/
void tr_bencMergeDicts( tr_benc * target, const tr_benc * source );
#ifdef __cplusplus
}
#endif
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#endif