mirror of
https://github.com/transmission/transmission
synced 2024-12-25 01:03:01 +00:00
240 lines
7.9 KiB
C
240 lines
7.9 KiB
C
/******************************************************************************
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* $Id$
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*
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* Copyright (c) 2005-2007 Transmission authors and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*****************************************************************************/
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#ifndef TR_UTILS_H
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#define TR_UTILS_H 1
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void tr_msgInit( void );
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#define tr_err( a... ) tr_msg( TR_MSG_ERR, ## a )
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#define tr_inf( a... ) tr_msg( TR_MSG_INF, ## a )
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#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 );
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void * tr_memmem( const void *, size_t, const void *, size_t );
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/***********************************************************************
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* tr_mkdir
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***********************************************************************
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* Create a directory and any needed parent directories.
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* Note that the string passed in must be writable!
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**********************************************************************/
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int tr_mkdir( char * path );
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/***********************************************************************
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* tr_strcasecmp
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***********************************************************************
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* A case-insensitive strncmp()
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**********************************************************************/
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#define tr_strcasecmp( ff, ss ) ( tr_strncasecmp( (ff), (ss), -1 ) )
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int tr_strncasecmp( const char * first, const char * second, int len );
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/***********************************************************************
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* tr_sprintf
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***********************************************************************
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* Appends to the end of a buffer using printf formatting,
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* growing the buffer if needed
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**********************************************************************/
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int tr_sprintf( char ** buf, int * used, int * max,
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const char * format, ... ) PRINTF( 4, 5 );
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/* gee, it sure would be nice if BeOS had va_copy() */
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int tr_vsprintf( char **, int *, int *, const char *, va_list, va_list );
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/* this concatenates some binary data onto the end of a buffer */
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int tr_concat( char ** buf, int * used, int * max,
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const char * data, int len );
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/***********************************************************************
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* tr_dupstr
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***********************************************************************
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* Creates a nul-terminated string
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**********************************************************************/
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char * tr_dupstr( const char * base, int len );
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int tr_ioErrorFromErrno( void );
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char * tr_errorString( int code );
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/***********************************************************************
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* tr_date
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***********************************************************************
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* Returns the current date in milliseconds
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**********************************************************************/
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static inline uint64_t tr_date()
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{
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struct timeval tv;
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gettimeofday( &tv, NULL );
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return (uint64_t) tv.tv_sec * 1000 + ( tv.tv_usec / 1000 );
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}
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/***********************************************************************
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* tr_wait
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***********************************************************************
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* Wait 'delay' milliseconds
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**********************************************************************/
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static inline void tr_wait( uint64_t delay )
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{
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#ifdef SYS_BEOS
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snooze( 1000 * delay );
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#else
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usleep( 1000 * delay );
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#endif
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}
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struct tr_bitfield_s
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{
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uint8_t * bits;
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int len;
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};
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/* note that the argument is how many bits are needed, not bytes */
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static inline tr_bitfield_t * tr_bitfieldNew( int bitcount )
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{
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tr_bitfield_t * ret;
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ret = calloc( 1, sizeof *ret );
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if( NULL == ret )
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{
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return NULL;
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}
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ret->len = ( bitcount + 7 ) / 8;
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ret->bits = calloc( ret->len, 1 );
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if( NULL == ret->bits )
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{
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free( ret );
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return NULL;
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}
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return ret;
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}
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static inline void tr_bitfieldFree( tr_bitfield_t * bitfield )
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{
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if( bitfield )
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{
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free( bitfield->bits );
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free( bitfield );
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}
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}
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static inline void tr_bitfieldClear( tr_bitfield_t * bitfield )
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{
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memset( bitfield->bits, 0, bitfield->len );
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}
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/***********************************************************************
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* tr_bitfieldHas
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**********************************************************************/
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static inline int tr_bitfieldHas( tr_bitfield_t * bitfield, int piece )
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{
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assert( piece / 8 < bitfield->len );
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return ( bitfield->bits[ piece / 8 ] & ( 1 << ( 7 - ( piece % 8 ) ) ) );
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}
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/***********************************************************************
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* tr_bitfieldAdd
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**********************************************************************/
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static inline void tr_bitfieldAdd( tr_bitfield_t * bitfield, int piece )
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{
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assert( piece / 8 < bitfield->len );
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bitfield->bits[ piece / 8 ] |= ( 1 << ( 7 - ( piece % 8 ) ) );
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}
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static inline void tr_bitfieldRem( tr_bitfield_t * bitfield, int piece )
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{
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assert( piece / 8 < bitfield->len );
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bitfield->bits[ piece / 8 ] &= ~( 1 << ( 7 - ( piece % 8 ) ) );
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}
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#define tr_blockPiece(a) _tr_blockPiece(tor,a)
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static inline int _tr_blockPiece( tr_torrent_t * tor, int block )
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{
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tr_info_t * inf = &tor->info;
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return block / ( inf->pieceSize / tor->blockSize );
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}
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#define tr_blockSize(a) _tr_blockSize(tor,a)
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static inline int _tr_blockSize( tr_torrent_t * tor, int block )
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{
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tr_info_t * inf = &tor->info;
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int dummy;
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if( block != tor->blockCount - 1 ||
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!( dummy = inf->totalSize % tor->blockSize ) )
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{
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return tor->blockSize;
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}
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return dummy;
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}
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#define tr_blockPosInPiece(a) _tr_blockPosInPiece(tor,a)
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static inline int _tr_blockPosInPiece( tr_torrent_t * tor, int block )
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{
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tr_info_t * inf = &tor->info;
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return tor->blockSize *
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( block % ( inf->pieceSize / tor->blockSize ) );
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}
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#define tr_pieceCountBlocks(a) _tr_pieceCountBlocks(tor,a)
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static inline int _tr_pieceCountBlocks( tr_torrent_t * tor, int piece )
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{
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tr_info_t * inf = &tor->info;
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if( piece < inf->pieceCount - 1 ||
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!( tor->blockCount % ( inf->pieceSize / tor->blockSize ) ) )
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{
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return inf->pieceSize / tor->blockSize;
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}
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return tor->blockCount % ( inf->pieceSize / tor->blockSize );
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}
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#define tr_pieceStartBlock(a) _tr_pieceStartBlock(tor,a)
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static inline int _tr_pieceStartBlock( tr_torrent_t * tor, int piece )
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{
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tr_info_t * inf = &tor->info;
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return piece * ( inf->pieceSize / tor->blockSize );
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}
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#define tr_pieceSize(a) _tr_pieceSize(tor,a)
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static inline int _tr_pieceSize( tr_torrent_t * tor, int piece )
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{
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tr_info_t * inf = &tor->info;
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if( piece < inf->pieceCount - 1 ||
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!( inf->totalSize % inf->pieceSize ) )
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{
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return inf->pieceSize;
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}
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return inf->totalSize % inf->pieceSize;
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}
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#define tr_block(a,b) _tr_block(tor,a,b)
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static inline int _tr_block( tr_torrent_t * tor, int index, int begin )
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{
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tr_info_t * inf = &tor->info;
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return index * ( inf->pieceSize / tor->blockSize ) +
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begin / tor->blockSize;
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}
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#endif
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