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
#include <inttypes.h>
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#include <stdarg.h>
#include <stddef.h> /* for size_t */
#include <stdio.h> /* FILE* */
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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 )
void tr_msg ( int level, char * msg, ... );
FILE* tr_getLog( void );
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int tr_rand ( int );
void * tr_memmem( const void *, size_t, const void *, size_t );
/***********************************************************************
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* tr_mkdirp
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***********************************************************************
* Create a directory and any needed parent directories.
* Note that the string passed in must be writable!
**********************************************************************/
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int tr_mkdirp( char * path, int permissions );
int tr_mkdir( const char * path, int permissions );
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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, ... );
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/* 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, ... );
struct timeval timevalSec ( int seconds );
struct timeval timevalMsec ( int milliseconds );
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int tr_ioErrorFromErrno( void );
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char * tr_errorString( int code );
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/* return the current date in milliseconds */
uint64_t tr_date( void );
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/* wait the specified number of milliseconds */
void tr_wait( uint64_t delay_milliseconds );
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/***********************************************************************
* strlcat_utf8
***********************************************************************
* According to the official specification, all strings in the torrent
* file are supposed to be UTF-8 encoded. However, there are
* non-compliant torrents around... If we encounter an invalid UTF-8
* character, we assume it is ISO 8859-1 and convert it to UTF-8.
**********************************************************************/
void strlcat_utf8( void *, const void *, size_t, char );
size_t bufsize_utf8( const void *, int * );
/***
****
***/
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/* Sometimes the system defines MAX/MIN, sometimes not. In the latter
case, define those here since we will use them */
#ifndef MAX
#define MAX(a,b) ((a)>(b)?(a):(b))
#endif
#ifndef MIN
#define MIN(a,b) ((a)>(b)?(b):(a))
#endif
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/***
****
***/
#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 );
/***
****
***/
typedef void (tr_set_func)(void * element, void * userData );
void tr_set_compare( const void * a, size_t aCount,
const void * b, size_t bCount,
int compare( const void * a, const void * b ),
size_t elementSize,
tr_set_func in_a_cb,
tr_set_func in_b_cb,
tr_set_func in_both_cb,
void * userData );
int tr_compareUint8 ( uint8_t a, uint8_t b );
int tr_compareUint16( uint16_t a, uint16_t b );
int tr_compareUint32( uint32_t a, uint32_t b );
int tr_compareUint64( uint64_t a, uint64_t b );
/***
****
***/
struct tr_bitfield
{
uint8_t * bits;
size_t len;
};
typedef struct tr_bitfield tr_bitfield;
typedef struct tr_bitfield tr_bitfield_t;
tr_bitfield* tr_bitfieldNew( size_t bitcount );
tr_bitfield* tr_bitfieldDup( const tr_bitfield* );
void tr_bitfieldFree( tr_bitfield*);
void tr_bitfieldClear( tr_bitfield* );
void tr_bitfieldAdd( tr_bitfield*, size_t bit );
void tr_bitfieldRem( tr_bitfield*, size_t bit );
void tr_bitfieldAddRange( tr_bitfield *, size_t begin, size_t end );
void tr_bitfieldRemRange ( tr_bitfield*, size_t begin, size_t end );
int tr_bitfieldIsEmpty( const tr_bitfield* );
size_t tr_bitfieldCountTrueBits( const tr_bitfield* );
tr_bitfield* tr_bitfieldNegate( tr_bitfield* );
tr_bitfield* tr_bitfieldAnd( tr_bitfield*, const tr_bitfield* );
#define tr_bitfieldHas(bitfield,nth) \
( ( bitfield ) && ( (bitfield)->bits[(nth)>>3] & 128 >>( (nth) & 7 ) ) )
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#endif