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transmission/libtransmission/utils.h

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/*
* This file Copyright (C) 2009 Charles Kerr <charles@transmissionbt.com>
*
* 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.
*
* $Id$
*/
#ifndef TR_UTILS_H
#define TR_UTILS_H 1
#include <inttypes.h>
#include <stdarg.h>
#include <stddef.h> /* size_t */
#include <stdio.h> /* FILE* */
#include <string.h> /* memcpy()* */
#include <stdlib.h> /* malloc() */
#include <time.h> /* time_t* */
#include "transmission.h"
#ifdef __cplusplus
extern "C" {
#endif
/***
****
***/
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef UNUSED
#ifdef __GNUC__
#define UNUSED __attribute__ ( ( unused ) )
#else
#define UNUSED
#endif
#endif
#ifndef TR_GNUC_PRINTF
#ifdef __GNUC__
#define TR_GNUC_PRINTF( fmt,\
args ) __attribute__ ( ( format ( printf, fmt,\
args ) ) )
#else
#define TR_GNUC_PRINTF( fmt, args )
#endif
#endif
#ifndef TR_GNUC_NULL_TERMINATED
#if __GNUC__ >= 4
#define TR_GNUC_NULL_TERMINATED __attribute__ ( ( __sentinel__ ) )
#else
#define TR_GNUC_NULL_TERMINATED
#endif
#endif
#if __GNUC__ > 2 || ( __GNUC__ == 2 && __GNUC_MINOR__ >= 96 )
#define TR_GNUC_PURE __attribute__ ( ( __pure__ ) )
#define TR_GNUC_MALLOC __attribute__ ( ( __malloc__ ) )
#else
#define TR_GNUC_PURE
#define TR_GNUC_MALLOC
#endif
/***
****
***/
#if !defined( _ )
#if defined( SYS_DARWIN )
#define _( a ) ( a )
#elif defined( HAVE_LIBINTL_H )
#include <libintl.h>
#define _( a ) gettext ( a )
#else
#define _( a ) ( a )
#endif
#endif
/* #define DISABLE_GETTEXT */
#if defined(TR_EMBEDDED) && !defined(DISABLE_GETTEXT)
#define DISABLE_GETTEXT
#endif
#ifdef DISABLE_GETTEXT
const char * tr_strip_positional_args( const char * fmt );
#undef _
#define _( a ) tr_strip_positional_args( a )
#endif
/****
*****
****/
int tr_msgLoggingIsActive( int level );
void tr_msg( const char * file,
int line,
int level,
const char * torrent,
const char * fmt,
... ) TR_GNUC_PRINTF( 5, 6 );
#define tr_nerr( n, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_ERR ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_ERR, n, __VA_ARGS__ ); \
} while( 0 )
#define tr_ninf( n, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_INF) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_INF, n, __VA_ARGS__ ); \
} while( 0 )
#define tr_ndbg( n, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_DBG) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_DBG, n, __VA_ARGS__ ); \
} while( 0 )
#define tr_torerr( tor, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_ERR ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_ERR, tor->info.name, __VA_ARGS__ ); \
} while( 0 )
#define tr_torinf( tor, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_INF ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_INF, tor->info.name, __VA_ARGS__ ); \
} while( 0 )
#define tr_tordbg( tor, ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_DBG ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_DBG, tor->info.name, __VA_ARGS__ ); \
} while( 0 )
#define tr_err( ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_ERR ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_ERR, NULL, __VA_ARGS__ ); \
} while( 0 )
#define tr_inf( ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_INF ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_INF, NULL, __VA_ARGS__ ); \
} while( 0 )
#define tr_dbg( ... ) \
do { \
if( tr_msgLoggingIsActive( TR_MSG_DBG ) ) \
tr_msg( __FILE__, __LINE__, TR_MSG_DBG, NULL, __VA_ARGS__ ); \
} while( 0 )
FILE* tr_getLog( void );
tr_bool tr_deepLoggingIsActive( void );
void tr_deepLog( const char * file,
int line,
const char * name,
const char * fmt,
... ) TR_GNUC_PRINTF( 4, 5 );
char* tr_getLogTimeStr( char * buf,
int buflen );
int tr_wildmat( const char * text,
const char * pattern );
/** a portability wrapper for basename(). */
char* tr_basename( const char * path ) TR_GNUC_MALLOC;
/** a portability wrapper for dirname(). */
char* tr_dirname( const char * path ) TR_GNUC_MALLOC;
/**
* a portability wrapper around mkdir().
* On WIN32, the `permissions' argument is unused.
*
* @return zero on success, or -1 if an error occurred
* (in which case errno is set appropriately).
*/
int tr_mkdir( const char * path,
int permissions );
/**
* Like mkdir, but makes parent directories as needed.
*
* @return zero on success, or -1 if an error occurred
* (in which case errno is set appropriately).
*/
int tr_mkdirp( const char * path,
int permissions );
/**
* Loads a file and returns its contents.
* On failure, NULL is returned and errno is set.
*/
uint8_t* tr_loadFile( const char * filename,
size_t * size ) TR_GNUC_MALLOC;
/* creates a filename from a series of elements using the
correct separator for filenames. */
char* tr_buildPath( const char * first_element, ... )
TR_GNUC_NULL_TERMINATED
TR_GNUC_MALLOC;
struct timeval;
void tr_timevalMsec( uint64_t milliseconds,
struct timeval * setme );
/* return the current date in milliseconds */
uint64_t tr_date( void );
/* wait the specified number of milliseconds */
void tr_wait( uint64_t delay_milliseconds );
char* tr_utf8clean( const char * str,
int max_len,
tr_bool * err );
/***
****
***/
struct evbuffer;
/** @brief pool of reusable buffers
@see tr_releaseBuffer() */
struct evbuffer * tr_getBuffer( void );
/** @brief return a buffer to the pool
@see tr_getBuffer() */
void tr_releaseBuffer( struct evbuffer * buf );
/***
****
***/
/* 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
/***
****
***/
static TR_INLINE void* tr_malloc( size_t size )
{
return size ? malloc( size ) : NULL;
}
static TR_INLINE void* tr_malloc0( size_t size )
{
return size ? calloc( 1, size ) : NULL;
}
static TR_INLINE void tr_free( void * p )
{
if( p != NULL )
free( p );
}
static TR_INLINE void* tr_memdup( const void * src, int byteCount )
{
return memcpy( tr_malloc( byteCount ), src, byteCount );
}
#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 ) ) ) )
/** @param in is a void* so that callers can pass in both signed & unsigned without a cast */
char* tr_strndup( const void * in, int len ) TR_GNUC_MALLOC;
/** @param in is a void* so that callers can pass in both signed & unsigned without a cast */
static TR_INLINE char* tr_strdup( const void * in )
{
return tr_strndup( in, in ? strlen( (const char *) in ) : 0 );
}
/* @brief same argument list as bsearch() */
int tr_lowerBound( const void * key,
const void * base,
size_t nmemb,
size_t size,
int (* compar)(const void* key, const void* arrayMember),
tr_bool * exact_match );
char* tr_strdup_printf( const char * fmt,
... ) TR_GNUC_PRINTF( 1, 2 ) TR_GNUC_MALLOC;
char* tr_base64_encode( const void * input,
int inlen,
int * outlen ) TR_GNUC_MALLOC;
char* tr_base64_decode( const void * input,
int inlen,
int * outlen ) TR_GNUC_MALLOC;
size_t tr_strlcpy( char * dst,
const void * src,
size_t siz );
int tr_snprintf( char * buf,
size_t buflen,
const char * fmt,
... ) TR_GNUC_PRINTF( 3, 4 );
const char* tr_strerror( int );
char* tr_strstrip( char * str );
/***
****
***/
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 );
void tr_sha1_to_hex( char * out,
const uint8_t * sha1 );
int tr_httpIsValidURL( const char * url );
int tr_httpParseURL( const char * url,
int url_len,
char ** setme_host,
int * setme_port,
char ** setme_path );
/***
****
***/
typedef struct tr_bitfield
{
uint8_t * bits;
size_t bitCount;
size_t byteCount;
}
tr_bitfield;
tr_bitfield* tr_bitfieldConstruct( tr_bitfield*, size_t bitcount );
tr_bitfield* tr_bitfieldDestruct( tr_bitfield* );
static TR_INLINE tr_bitfield* tr_bitfieldNew( size_t bitcount )
{
return tr_bitfieldConstruct( tr_new0( tr_bitfield, 1 ), bitcount );
}
static TR_INLINE void tr_bitfieldFree( tr_bitfield * b )
{
tr_free( tr_bitfieldDestruct( b ) );
}
tr_bitfield* tr_bitfieldDup( const tr_bitfield* ) TR_GNUC_MALLOC;
void tr_bitfieldClear( tr_bitfield* );
int tr_bitfieldAdd( tr_bitfield*, size_t bit );
int tr_bitfieldRem( tr_bitfield*, size_t bit );
int tr_bitfieldAddRange( tr_bitfield *, size_t begin, size_t end );
int tr_bitfieldRemRange( tr_bitfield*, size_t begin, size_t end );
void tr_bitfieldDifference( tr_bitfield *, const tr_bitfield * );
int tr_bitfieldIsEmpty( const tr_bitfield* );
size_t tr_bitfieldCountTrueBits( const tr_bitfield* );
tr_bitfield* tr_bitfieldOr( tr_bitfield*, const tr_bitfield* );
/** A stripped-down version of bitfieldHas to be used
for speed when you're looping quickly. This version
has none of tr_bitfieldHas()'s safety checks, so you
need to call tr_bitfieldTestFast() first before you
start looping. */
static TR_INLINE tr_bool tr_bitfieldHasFast( const tr_bitfield * b, const size_t nth )
{
return ( b->bits[nth>>3u] << ( nth & 7u ) & 0x80 ) != 0;
}
/** @param high the highest nth bit you're going to access */
static TR_INLINE tr_bool tr_bitfieldTestFast( const tr_bitfield * b, const size_t high )
{
return ( b != NULL )
&& ( b->bits != NULL )
&& ( high < b->bitCount );
}
static TR_INLINE tr_bool tr_bitfieldHas( const tr_bitfield * b, size_t nth )
{
return tr_bitfieldTestFast( b, nth ) && tr_bitfieldHasFast( b, nth );
}
double tr_getRatio( double numerator, double denominator );
int tr_ptr2int( void* );
void* tr_int2ptr( int );
#ifdef __cplusplus
}
#endif
#endif
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