transmission/libtransmission/utils.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_UTILS_H
#define TR_UTILS_H 1
void tr_msgInit( void );
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#define tr_err( a... ) tr_msg( TR_MSG_ERR, ## a )
#define tr_inf( a... ) tr_msg( TR_MSG_INF, ## a )
#define tr_dbg( a... ) tr_msg( TR_MSG_DBG, ## a )
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void tr_msg ( int level, char * msg, ... ) PRINTF( 2, 3 );
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int tr_rand ( int );
void * tr_memmem( const void *, size_t, const void *, size_t );
/***********************************************************************
* tr_mkdir
***********************************************************************
* Create a directory and any needed parent directories.
* Note that the string passed in must be writable!
**********************************************************************/
int tr_mkdir( char * path );
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/***********************************************************************
* tr_strcasecmp
***********************************************************************
* A case-insensitive strncmp()
**********************************************************************/
#define tr_strcasecmp( ff, ss ) ( tr_strncasecmp( (ff), (ss), ULONG_MAX ) )
int tr_strncasecmp( const char * first, const char * second, size_t len );
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/***********************************************************************
* tr_sprintf
***********************************************************************
* Appends to the end of a buffer using printf formatting,
* growing the buffer if needed
**********************************************************************/
int tr_sprintf( char ** buf, int * used, int * max,
const char * format, ... ) PRINTF( 4, 5 );
/* gee, it sure would be nice if BeOS had va_copy() */
int tr_vsprintf( char **, int *, int *, const char *, va_list, va_list );
/* this concatenates some binary data onto the end of a buffer */
int tr_concat( char ** buf, int * used, int * max,
const char * data, int len );
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/* creates a filename from a series of elements using the
correct separator for filenames. */
void tr_buildPath ( char* buf, size_t buflen,
const char * first_element, ... );
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int tr_ioErrorFromErrno( void );
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char * tr_errorString( int code );
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/***********************************************************************
* tr_date
***********************************************************************
* Returns the current date in milliseconds
**********************************************************************/
static inline uint64_t tr_date()
{
struct timeval tv;
gettimeofday( &tv, NULL );
return (uint64_t) tv.tv_sec * 1000 + ( tv.tv_usec / 1000 );
}
/***********************************************************************
* tr_wait
***********************************************************************
* Wait 'delay' milliseconds
**********************************************************************/
static inline void tr_wait( uint64_t delay )
{
#ifdef SYS_BEOS
snooze( 1000 * delay );
#else
usleep( 1000 * delay );
#endif
}
#define tr_blockPiece(a) _tr_blockPiece(tor,a)
static inline int _tr_blockPiece( const tr_torrent_t * tor, int block )
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{
const tr_info_t * inf = &tor->info;
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return block / ( inf->pieceSize / tor->blockSize );
}
#define tr_blockSize(a) _tr_blockSize(tor,a)
static inline int _tr_blockSize( const tr_torrent_t * tor, int block )
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{
const tr_info_t * inf = &tor->info;
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int dummy;
if( block != tor->blockCount - 1 ||
!( dummy = inf->totalSize % tor->blockSize ) )
{
return tor->blockSize;
}
return dummy;
}
#define tr_blockPosInPiece(a) _tr_blockPosInPiece(tor,a)
static inline int _tr_blockPosInPiece( const tr_torrent_t * tor, int block )
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{
const tr_info_t * inf = &tor->info;
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return tor->blockSize *
( block % ( inf->pieceSize / tor->blockSize ) );
}
#define tr_pieceCountBlocks(a) _tr_pieceCountBlocks(tor,a)
static inline int _tr_pieceCountBlocks( const tr_torrent_t * tor, int piece )
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{
const tr_info_t * inf = &tor->info;
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if( piece < inf->pieceCount - 1 ||
!( tor->blockCount % ( inf->pieceSize / tor->blockSize ) ) )
{
return inf->pieceSize / tor->blockSize;
}
return tor->blockCount % ( inf->pieceSize / tor->blockSize );
}
#define tr_pieceStartBlock(a) _tr_pieceStartBlock(tor,a)
static inline int _tr_pieceStartBlock( const tr_torrent_t * tor, int piece )
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{
const tr_info_t * inf = &tor->info;
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return piece * ( inf->pieceSize / tor->blockSize );
}
#define tr_pieceSize(a) _tr_pieceSize(tor,a)
static inline int _tr_pieceSize( const tr_torrent_t * tor, int piece )
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{
const tr_info_t * inf = &tor->info;
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if( piece < inf->pieceCount - 1 ||
!( inf->totalSize % inf->pieceSize ) )
{
return inf->pieceSize;
}
return inf->totalSize % inf->pieceSize;
}
#define tr_block(a,b) _tr_block(tor,a,b)
static inline int _tr_block( const tr_torrent_t * tor, int index, int begin )
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{
const tr_info_t * inf = &tor->info;
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return index * ( inf->pieceSize / tor->blockSize ) +
begin / tor->blockSize;
}
/***
****
***/
#define tr_new(struct_type, n_structs) \
((struct_type *) tr_malloc (((size_t) sizeof (struct_type)) * ((size_t) (n_structs))))
#define tr_new0(struct_type, n_structs) \
((struct_type *) tr_malloc0 (((size_t) sizeof (struct_type)) * ((size_t) (n_structs))))
#define tr_renew(struct_type, mem, n_structs) \
((struct_type *) realloc ((mem), ((size_t) sizeof (struct_type)) * ((size_t) (n_structs))))
void* tr_malloc ( size_t );
void* tr_malloc0 ( size_t );
void* tr_calloc ( size_t nmemb, size_t size );
void tr_free ( void* );
char* tr_strdup( const char * str );
char* tr_strndup( const char * str, int len );
/***
****
***/
struct tr_bitfield_s
{
uint8_t * bits;
size_t len;
};
tr_bitfield_t* tr_bitfieldNew( size_t bitcount );
tr_bitfield_t* tr_bitfieldDup( const tr_bitfield_t* );
void tr_bitfieldFree( tr_bitfield_t*);
void tr_bitfieldClear( tr_bitfield_t* );
void tr_bitfieldAdd( tr_bitfield_t*, size_t bit );
void tr_bitfieldRem( tr_bitfield_t*, size_t bit );
void tr_bitfieldAddRange( tr_bitfield_t *, size_t first, size_t last );
void tr_bitfieldRemRange ( tr_bitfield_t*, size_t first, size_t last );
int tr_bitfieldIsEmpty( const tr_bitfield_t* );
int tr_bitfieldHas( const tr_bitfield_t *, size_t bit );
size_t tr_bitfieldCountTrueBits( const tr_bitfield_t* );
tr_bitfield_t* tr_bitfieldNegate( tr_bitfield_t* );
tr_bitfield_t* tr_bitfieldAnd( tr_bitfield_t*, const tr_bitfield_t* );
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#endif