source: trunk/libtransmission/utils.h @ 1444

Last change on this file since 1444 was 1444, checked in by joshe, 16 years ago

Correctly bencode strings containing nul characters.

  • Property svn:keywords set to Date Rev Author Id
File size: 6.9 KB
Line 
1/******************************************************************************
2 * $Id: utils.h 1444 2007-01-28 23:26:57Z joshe $
3 *
4 * Copyright (c) 2005-2006 Transmission authors and contributors
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *****************************************************************************/
24
25#ifndef TR_UTILS_H
26#define TR_UTILS_H 1
27
28void tr_msgInit( void );
29
30#define tr_err( a... ) tr_msg( TR_MSG_ERR, ## a )
31#define tr_inf( a... ) tr_msg( TR_MSG_INF, ## a )
32#define tr_dbg( a... ) tr_msg( TR_MSG_DBG, ## a )
33void tr_msg  ( int level, char * msg, ... ) PRINTF( 2, 3 );
34
35int  tr_rand ( int );
36
37void * tr_memmem( const void *, size_t, const void *, size_t );
38
39/***********************************************************************
40 * tr_mkdir
41 ***********************************************************************
42 * Create a directory and any needed parent directories.
43 * Note that the string passed in must be writable!
44 **********************************************************************/
45int tr_mkdir( char * path );
46
47/***********************************************************************
48 * tr_strcasecmp
49 ***********************************************************************
50 * A case-insensitive strncmp()
51 **********************************************************************/
52#define tr_strcasecmp( ff, ss ) ( tr_strncasecmp( (ff), (ss), -1 ) )
53int tr_strncasecmp( const char * first, const char * second, int len );
54
55/***********************************************************************
56 * tr_sprintf
57 ***********************************************************************
58 * Appends to the end of a buffer using printf formatting,
59 * growing the buffer if needed
60 **********************************************************************/
61int tr_sprintf( char ** buf, int * used, int * max,
62                const char * format, ... ) PRINTF( 4, 5 );
63/* gee, it sure would be nice if BeOS had va_copy() */
64int tr_vsprintf( char **, int *, int *, const char *, va_list, va_list );
65/* this concatenates some binary data onto the end of a buffer */
66int tr_concat( char ** buf, int * used, int * max,
67               const char * data, int len );
68
69/***********************************************************************
70 * tr_dupstr
71 ***********************************************************************
72 * Creates a nul-terminated string
73 **********************************************************************/
74char * tr_dupstr( const char * base, int len );
75
76char * tr_errorString( int code );
77
78/***********************************************************************
79 * tr_date
80 ***********************************************************************
81 * Returns the current date in milliseconds
82 **********************************************************************/
83static inline uint64_t tr_date()
84{
85    struct timeval tv;
86    gettimeofday( &tv, NULL );
87    return (uint64_t) tv.tv_sec * 1000 + ( tv.tv_usec / 1000 );
88}
89
90/***********************************************************************
91 * tr_wait
92 ***********************************************************************
93 * Wait 'delay' milliseconds
94 **********************************************************************/
95static inline void tr_wait( uint64_t delay )
96{
97#ifdef SYS_BEOS
98    snooze( 1000 * delay );
99#else
100    usleep( 1000 * delay );
101#endif
102}
103
104/***********************************************************************
105 * tr_bitfieldHas
106 **********************************************************************/
107static inline int tr_bitfieldHas( uint8_t * bitfield, int piece )
108{
109    return ( bitfield[ piece / 8 ] & ( 1 << ( 7 - ( piece % 8 ) ) ) );
110}
111
112/***********************************************************************
113 * tr_bitfieldAdd
114 **********************************************************************/
115static inline void tr_bitfieldAdd( uint8_t * bitfield, int piece )
116{
117    bitfield[ piece / 8 ] |= ( 1 << ( 7 - ( piece % 8 ) ) );
118}
119
120static inline void tr_bitfieldRem( uint8_t * bitfield, int piece )
121{
122    bitfield[ piece / 8 ] &= ~( 1 << ( 7 - ( piece % 8 ) ) );
123}
124
125#define tr_blockPiece(a) _tr_blockPiece(tor,a)
126static inline int _tr_blockPiece( tr_torrent_t * tor, int block )
127{
128    tr_info_t * inf = &tor->info;
129    return block / ( inf->pieceSize / tor->blockSize );
130}
131
132#define tr_blockSize(a) _tr_blockSize(tor,a)
133static inline int _tr_blockSize( tr_torrent_t * tor, int block )
134{
135    tr_info_t * inf = &tor->info;
136    int dummy;
137
138    if( block != tor->blockCount - 1 ||
139        !( dummy = inf->totalSize % tor->blockSize ) )
140    {
141        return tor->blockSize;
142    }
143
144    return dummy;
145}
146
147#define tr_blockPosInPiece(a) _tr_blockPosInPiece(tor,a)
148static inline int _tr_blockPosInPiece( tr_torrent_t * tor, int block )
149{
150    tr_info_t * inf = &tor->info;
151    return tor->blockSize *
152        ( block % ( inf->pieceSize / tor->blockSize ) );
153}
154
155#define tr_pieceCountBlocks(a) _tr_pieceCountBlocks(tor,a)
156static inline int _tr_pieceCountBlocks( tr_torrent_t * tor, int piece )
157{
158    tr_info_t * inf = &tor->info;
159    if( piece < inf->pieceCount - 1 ||
160        !( tor->blockCount % ( inf->pieceSize / tor->blockSize ) ) )
161    {
162        return inf->pieceSize / tor->blockSize;
163    }
164    return tor->blockCount % ( inf->pieceSize / tor->blockSize );
165}
166
167#define tr_pieceStartBlock(a) _tr_pieceStartBlock(tor,a)
168static inline int _tr_pieceStartBlock( tr_torrent_t * tor, int piece )
169{
170    tr_info_t * inf = &tor->info;
171    return piece * ( inf->pieceSize / tor->blockSize );
172}
173
174#define tr_pieceSize(a) _tr_pieceSize(tor,a)
175static inline int _tr_pieceSize( tr_torrent_t * tor, int piece )
176{
177    tr_info_t * inf = &tor->info;
178    if( piece < inf->pieceCount - 1 ||
179        !( inf->totalSize % inf->pieceSize ) )
180    {
181        return inf->pieceSize;
182    }
183    return inf->totalSize % inf->pieceSize;
184}
185
186#define tr_block(a,b) _tr_block(tor,a,b)
187static inline int _tr_block( tr_torrent_t * tor, int index, int begin )
188{
189    tr_info_t * inf = &tor->info;
190    return index * ( inf->pieceSize / tor->blockSize ) +
191        begin / tor->blockSize;
192}
193
194#endif
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