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transmission/libtransmission/utils.c

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/******************************************************************************
* $Id$
*
* Copyright (c) 2005-2008 Transmission authors and contributors
*
* 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.
*****************************************************************************/
#include <assert.h>
#include <ctype.h> /* isalpha, tolower */
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h> /* strerror, memset */
#include <libgen.h> /* basename */
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h> /* usleep, stat, getcwd */
#include "event.h"
#ifdef WIN32
#include <direct.h> /* _getcwd */
#include <windows.h> /* Sleep */
#endif
#include "transmission.h"
#include "list.h"
#include "utils.h"
#include "platform.h"
static tr_lock * messageLock = NULL;
static int messageLevel = 0;
static tr_bool messageQueuing = FALSE;
static tr_msg_list * messageQueue = NULL;
static tr_msg_list ** messageQueueTail = &messageQueue;
#ifndef WIN32
/* make null versions of these win32 functions */
static int IsDebuggerPresent( void ) { return FALSE; }
static void OutputDebugString( const void * unused UNUSED ) { }
#endif
static void
tr_msgInit( void )
{
static tr_bool initialized = FALSE;
if( !initialized )
{
char * env = getenv( "TR_DEBUG" );
messageLevel = ( env ? atoi( env ) : 0 ) + 1;
messageLevel = MAX( 1, messageLevel );
messageLock = tr_lockNew( );
initialized = TRUE;
}
}
FILE*
tr_getLog( void )
{
static int initialized = FALSE;
static FILE * file = NULL;
if( !initialized )
{
const char * str = getenv( "TR_DEBUG_FD" );
int fd = 0;
if( str && *str )
fd = atoi( str );
switch( fd )
{
case 1:
file = stdout; break;
case 2:
file = stderr; break;
default:
file = NULL; break;
}
initialized = TRUE;
}
return file;
}
void
tr_setMessageLevel( int level )
{
tr_msgInit( );
tr_lockLock( messageLock );
messageLevel = MAX( 0, level );
tr_lockUnlock( messageLock );
}
int
tr_getMessageLevel( void )
{
int ret;
tr_msgInit( );
tr_lockLock( messageLock );
ret = messageLevel;
tr_lockUnlock( messageLock );
return ret;
}
void
tr_setMessageQueuing( tr_bool enabled )
{
tr_msgInit( );
tr_lockLock( messageLock );
messageQueuing = enabled;
tr_lockUnlock( messageLock );
}
tr_bool
tr_getMessageQueuing( void )
{
int ret;
tr_msgInit( );
tr_lockLock( messageLock );
ret = messageQueuing;
tr_lockUnlock( messageLock );
return ret;
}
tr_msg_list *
tr_getQueuedMessages( void )
{
tr_msg_list * ret;
tr_msgInit( );
tr_lockLock( messageLock );
ret = messageQueue;
messageQueue = NULL;
messageQueueTail = &messageQueue;
tr_lockUnlock( messageLock );
return ret;
}
void
tr_freeMessageList( tr_msg_list * list )
{
tr_msg_list * next;
while( NULL != list )
{
next = list->next;
free( list->message );
free( list->name );
free( list );
list = next;
}
}
/**
***
**/
static struct tm *
tr_localtime_r( time_t *_clock, struct tm *_result )
{
#ifdef HAVE_LOCALTIME_R
return localtime_r( _clock, _result );
#else
struct tm *p = localtime( _clock );
if( p )
*(_result) = *p;
return p;
#endif
}
char*
tr_getLogTimeStr( char * buf,
int buflen )
{
char tmp[64];
time_t now;
struct tm now_tm;
struct timeval tv;
int milliseconds;
now = time( NULL );
gettimeofday( &tv, NULL );
tr_localtime_r( &now, &now_tm );
strftime( tmp, sizeof( tmp ), "%H:%M:%S", &now_tm );
milliseconds = (int)( tv.tv_usec / 1000 );
tr_snprintf( buf, buflen, "%s.%03d", tmp, milliseconds );
return buf;
}
tr_bool
tr_deepLoggingIsActive( void )
{
static int8_t deepLoggingIsActive = -1;
if( deepLoggingIsActive < 0 )
deepLoggingIsActive = IsDebuggerPresent() || (tr_getLog()!=NULL);
return deepLoggingIsActive != 0;
}
void
tr_deepLog( const char * file,
int line,
const char * name,
const char * fmt,
... )
{
FILE * fp = tr_getLog( );
if( fp || IsDebuggerPresent( ) )
{
va_list args;
char timestr[64];
struct evbuffer * buf = tr_getBuffer( );
char * base = tr_basename( file );
evbuffer_add_printf( buf, "[%s] ",
tr_getLogTimeStr( timestr, sizeof( timestr ) ) );
if( name )
evbuffer_add_printf( buf, "%s ", name );
va_start( args, fmt );
evbuffer_add_vprintf( buf, fmt, args );
va_end( args );
evbuffer_add_printf( buf, " (%s:%d)\n", base, line );
OutputDebugString( EVBUFFER_DATA( buf ) );
if(fp)
(void) fwrite( EVBUFFER_DATA( buf ), 1, EVBUFFER_LENGTH( buf ), fp );
tr_free( base );
tr_releaseBuffer( buf );
}
}
/***
****
***/
int
tr_msgLoggingIsActive( int level )
{
tr_msgInit( );
return messageLevel >= level;
}
void
tr_msg( const char * file,
int line,
int level,
const char * name,
const char * fmt,
... )
{
FILE * fp;
tr_msgInit( );
tr_lockLock( messageLock );
fp = tr_getLog( );
if( messageLevel >= level )
{
char buf[MAX_STACK_ARRAY_SIZE];
va_list ap;
/* build the text message */
*buf = '\0';
va_start( ap, fmt );
evutil_vsnprintf( buf, sizeof( buf ), fmt, ap );
va_end( ap );
OutputDebugString( buf );
if( *buf )
{
if( messageQueuing )
{
tr_msg_list * newmsg;
newmsg = tr_new0( tr_msg_list, 1 );
newmsg->level = level;
newmsg->when = time( NULL );
newmsg->message = tr_strdup( buf );
newmsg->file = file;
newmsg->line = line;
newmsg->name = tr_strdup( name );
*messageQueueTail = newmsg;
messageQueueTail = &newmsg->next;
}
else
{
if( fp == NULL )
fp = stderr;
if( name )
fprintf( fp, "%s: %s\n", name, buf );
else
fprintf( fp, "%s\n", buf );
fflush( fp );
}
}
}
tr_lockUnlock( messageLock );
}
/***
****
***/
void
tr_set_compare( const void * va,
size_t aCount,
const void * vb,
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 )
{
const uint8_t * a = (const uint8_t *) va;
const uint8_t * b = (const uint8_t *) vb;
const uint8_t * aend = a + elementSize * aCount;
const uint8_t * bend = b + elementSize * bCount;
while( a != aend || b != bend )
{
if( a == aend )
{
( *in_b_cb )( (void*)b, userData );
b += elementSize;
}
else if( b == bend )
{
( *in_a_cb )( (void*)a, userData );
a += elementSize;
}
else
{
const int val = ( *compare )( a, b );
if( !val )
{
( *in_both_cb )( (void*)a, userData );
a += elementSize;
b += elementSize;
}
else if( val < 0 )
{
( *in_a_cb )( (void*)a, userData );
a += elementSize;
}
else if( val > 0 )
{
( *in_b_cb )( (void*)b, userData );
b += elementSize;
}
}
}
}
/***
****
***/
#ifdef DISABLE_GETTEXT
const char*
tr_strip_positional_args( const char* str )
{
static size_t bufsize = 0;
static char * buf = NULL;
const size_t len = strlen( str );
char * out;
if( bufsize < len )
{
bufsize = len * 2;
buf = tr_renew( char, buf, bufsize );
}
for( out = buf; *str; ++str )
{
*out++ = *str;
if( ( *str == '%' ) && isdigit( str[1] ) )
{
const char * tmp = str + 1;
while( isdigit( *tmp ) )
++tmp;
if( *tmp == '$' )
str = tmp;
}
}
*out = '\0';
return buf;
}
#endif
/**
***
**/
void
tr_timevalMsec( uint64_t milliseconds, struct timeval * setme )
{
const uint64_t microseconds = milliseconds * 1000;
assert( setme != NULL );
setme->tv_sec = microseconds / 1000000;
setme->tv_usec = microseconds % 1000000;
}
uint8_t *
tr_loadFile( const char * path,
size_t * size )
{
uint8_t * buf;
struct stat sb;
FILE * file;
const char * err_fmt = _( "Couldn't read \"%1$s\": %2$s" );
/* try to stat the file */
errno = 0;
if( stat( path, &sb ) )
{
const int err = errno;
tr_dbg( err_fmt, path, tr_strerror( errno ) );
errno = err;
return NULL;
}
if( ( sb.st_mode & S_IFMT ) != S_IFREG )
{
tr_err( err_fmt, path, _( "Not a regular file" ) );
errno = EISDIR;
return NULL;
}
/* Load the torrent file into our buffer */
file = fopen( path, "rb" );
if( !file )
{
const int err = errno;
tr_err( err_fmt, path, tr_strerror( errno ) );
errno = err;
return NULL;
}
buf = malloc( sb.st_size );
if( !buf )
{
const int err = errno;
tr_err( err_fmt, path, _( "Memory allocation failed" ) );
fclose( file );
errno = err;
return NULL;
}
if( fread( buf, sb.st_size, 1, file ) != 1 )
{
const int err = errno;
tr_err( err_fmt, path, tr_strerror( errno ) );
fclose( file );
free( buf );
errno = err;
return NULL;
}
fclose( file );
*size = sb.st_size;
return buf;
}
char*
tr_basename( const char * path )
{
char * tmp = tr_strdup( path );
char * ret = tr_strdup( basename( tmp ) );
tr_free( tmp );
return ret;
}
char*
tr_dirname( const char * path )
{
char * tmp = tr_strdup( path );
char * ret = tr_strdup( dirname( tmp ) );
tr_free( tmp );
return ret;
}
int
tr_mkdir( const char * path,
int permissions
#ifdef WIN32
UNUSED
#endif
)
{
#ifdef WIN32
if( path && isalpha( path[0] ) && path[1] == ':' && !path[2] )
return 0;
return mkdir( path );
#else
return mkdir( path, permissions );
#endif
}
int
tr_mkdirp( const char * path_in,
int permissions )
{
char * path = tr_strdup( path_in );
char * p, * pp;
struct stat sb;
int done;
/* walk past the root */
p = path;
while( *p == TR_PATH_DELIMITER )
++p;
pp = p;
done = 0;
while( ( p =
strchr( pp, TR_PATH_DELIMITER ) ) || ( p = strchr( pp, '\0' ) ) )
{
if( !*p )
done = 1;
else
*p = '\0';
if( stat( path, &sb ) )
{
/* Folder doesn't exist yet */
if( tr_mkdir( path, permissions ) )
{
const int err = errno;
tr_err( _(
"Couldn't create \"%1$s\": %2$s" ), path,
tr_strerror( err ) );
tr_free( path );
errno = err;
return -1;
}
}
else if( ( sb.st_mode & S_IFMT ) != S_IFDIR )
{
/* Node exists but isn't a folder */
char * buf = tr_strdup_printf( _( "File \"%s\" is in the way" ), path );
tr_err( _( "Couldn't create \"%1$s\": %2$s" ), path_in, buf );
tr_free( buf );
tr_free( path );
errno = ENOTDIR;
return -1;
}
if( done )
break;
*p = TR_PATH_DELIMITER;
p++;
pp = p;
}
tr_free( path );
return 0;
}
char*
tr_buildPath( const char *first_element, ... )
{
size_t bufLen = 0;
const char * element;
char * buf;
char * pch;
va_list vl;
/* pass 1: allocate enough space for the string */
va_start( vl, first_element );
element = first_element;
while( element ) {
bufLen += strlen( element ) + 1;
element = (const char*) va_arg( vl, const char* );
}
pch = buf = tr_new( char, bufLen );
va_end( vl );
/* pass 2: build the string piece by piece */
va_start( vl, first_element );
element = first_element;
while( element ) {
const size_t elementLen = strlen( element );
memcpy( pch, element, elementLen );
pch += elementLen;
*pch++ = TR_PATH_DELIMITER;
element = (const char*) va_arg( vl, const char* );
}
va_end( vl );
/* terminate the string. if nonempty, eat the unwanted trailing slash */
if( pch != buf )
--pch;
*pch++ = '\0';
/* sanity checks & return */
assert( pch - buf == (off_t)bufLen );
return buf;
}
/****
*****
****/
char*
tr_strndup( const void * in,
int len )
{
char * out = NULL;
if( len < 0 )
{
out = tr_strdup( in );
}
else if( in )
{
out = tr_malloc( len + 1 );
memcpy( out, in, len );
out[len] = '\0';
}
return out;
}
char*
tr_strdup_printf( const char * fmt, ... )
{
char * ret = NULL;
struct evbuffer * buf;
va_list ap;
buf = tr_getBuffer( );
va_start( ap, fmt );
if( evbuffer_add_vprintf( buf, fmt, ap ) != -1 )
ret = tr_strdup( EVBUFFER_DATA( buf ) );
va_end( ap );
tr_releaseBuffer( buf );
return ret;
}
const char*
tr_strerror( int i )
{
const char * ret = strerror( i );
if( ret == NULL )
ret = "Unknown Error";
return ret;
}
/****
*****
****/
char*
tr_strstrip( char * str )
{
if( str != NULL )
{
size_t pos;
size_t len = strlen( str );
while( len && isspace( str[len - 1] ) )
--len;
str[len] = '\0';
for( pos = 0; pos < len && isspace( str[pos] ); )
++pos;
len -= pos;
memmove( str, str + pos, len );
str[len] = '\0';
}
return str;
}
/****
*****
****/
tr_bitfield*
tr_bitfieldConstruct( tr_bitfield * b, size_t bitCount )
{
b->bitCount = bitCount;
b->byteCount = ( bitCount + 7u ) / 8u;
b->bits = tr_new0( uint8_t, b->byteCount );
return b;
}
tr_bitfield*
tr_bitfieldDestruct( tr_bitfield * b )
{
if( b )
tr_free( b->bits );
return b;
}
tr_bitfield*
tr_bitfieldDup( const tr_bitfield * in )
{
tr_bitfield * ret = tr_new0( tr_bitfield, 1 );
ret->bitCount = in->bitCount;
ret->byteCount = in->byteCount;
ret->bits = tr_memdup( in->bits, in->byteCount );
return ret;
}
void
tr_bitfieldClear( tr_bitfield * bitfield )
{
memset( bitfield->bits, 0, bitfield->byteCount );
}
int
tr_bitfieldIsEmpty( const tr_bitfield * bitfield )
{
size_t i;
for( i = 0; i < bitfield->byteCount; ++i )
if( bitfield->bits[i] )
return 0;
return 1;
}
int
tr_bitfieldAdd( tr_bitfield * bitfield,
size_t nth )
{
assert( bitfield );
assert( bitfield->bits );
if( nth >= bitfield->bitCount )
return -1;
bitfield->bits[nth >> 3u] |= ( 0x80 >> ( nth & 7u ) );
return 0;
}
/* Sets bit range [begin, end) to 1 */
int
tr_bitfieldAddRange( tr_bitfield * b,
size_t begin,
size_t end )
{
size_t sb, eb;
unsigned char sm, em;
end--;
if( ( end >= b->bitCount ) || ( begin > end ) )
return -1;
sb = begin >> 3;
sm = ~( 0xff << ( 8 - ( begin & 7 ) ) );
eb = end >> 3;
em = 0xff << ( 7 - ( end & 7 ) );
if( sb == eb )
{
b->bits[sb] |= ( sm & em );
}
else
{
b->bits[sb] |= sm;
b->bits[eb] |= em;
if( ++sb < eb )
memset ( b->bits + sb, 0xff, eb - sb );
}
return 0;
}
int
tr_bitfieldRem( tr_bitfield * bitfield,
size_t nth )
{
assert( bitfield );
assert( bitfield->bits );
if( nth >= bitfield->bitCount )
return -1;
bitfield->bits[nth >> 3u] &= ( 0xff7f >> ( nth & 7u ) );
return 0;
}
/* Clears bit range [begin, end) to 0 */
int
tr_bitfieldRemRange( tr_bitfield * b,
size_t begin,
size_t end )
{
size_t sb, eb;
unsigned char sm, em;
end--;
if( ( end >= b->bitCount ) || ( begin > end ) )
return -1;
sb = begin >> 3;
sm = 0xff << ( 8 - ( begin & 7 ) );
eb = end >> 3;
em = ~( 0xff << ( 7 - ( end & 7 ) ) );
if( sb == eb )
{
b->bits[sb] &= ( sm | em );
}
else
{
b->bits[sb] &= sm;
b->bits[eb] &= em;
if( ++sb < eb )
memset ( b->bits + sb, 0, eb - sb );
}
return 0;
}
tr_bitfield*
tr_bitfieldOr( tr_bitfield * a,
const tr_bitfield * b )
{
uint8_t * ait;
const uint8_t *aend, *bit;
assert( a->bitCount == b->bitCount );
for( ait = a->bits, bit = b->bits, aend = ait + a->byteCount;
ait != aend; )
*ait++ |= *bit++;
return a;
}
/* set 'a' to all the flags that were in 'a' but not 'b' */
void
tr_bitfieldDifference( tr_bitfield * a,
const tr_bitfield * b )
{
uint8_t * ait;
const uint8_t *aend, *bit;
assert( a->bitCount == b->bitCount );
for( ait = a->bits, bit = b->bits, aend = ait + a->byteCount;
ait != aend; )
*ait++ &= ~( *bit++ );
}
size_t
tr_bitfieldCountTrueBits( const tr_bitfield* b )
{
size_t ret = 0;
const uint8_t * it, *end;
static const int trueBitCount[512] = {
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3,
4, 2, 3, 3, 4, 3, 4, 4, 5,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6,
7, 5, 6, 6, 7, 6, 7, 7, 8,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4,
5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6,
7, 5, 6, 6, 7, 6, 7, 7, 8,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5,
6, 4, 5, 5, 6, 5, 6, 6, 7,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6,
7, 5, 6, 6, 7, 6, 7, 7, 8,
3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6,
7, 5, 6, 6, 7, 6, 7, 7, 8,
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8, 5, 6, 6, 7, 6, 7, 7,
8, 6, 7, 7, 8, 7, 8, 8, 9
};
if( !b )
return 0;
for( it = b->bits, end = it + b->byteCount; it != end; ++it )
ret += trueBitCount[*it];
return ret;
}
/***
****
***/
uint64_t
tr_date( void )
{
struct timeval tv;
gettimeofday( &tv, NULL );
return (uint64_t) tv.tv_sec * 1000 + ( tv.tv_usec / 1000 );
}
void
tr_wait( uint64_t delay_milliseconds )
{
#ifdef WIN32
Sleep( (DWORD)delay_milliseconds );
#else
usleep( 1000 * delay_milliseconds );
#endif
}
/***
****
***/
int
tr_snprintf( char * buf,
size_t buflen,
const char * fmt,
... )
{
int len;
va_list args;
va_start( args, fmt );
len = evutil_vsnprintf( buf, buflen, fmt, args );
va_end( args );
return len;
}
/*
* Copy src to string dst of size siz. At most siz-1 characters
* will be copied. Always NUL terminates (unless siz == 0).
* Returns strlen(src); if retval >= siz, truncation occurred.
*/
size_t
tr_strlcpy( char * dst,
const void * src,
size_t siz )
{
#ifdef HAVE_STRLCPY
return strlcpy( dst, src, siz );
#else
char * d = dst;
const char *s = src;
size_t n = siz;
assert( s );
assert( d );
/* Copy as many bytes as will fit */
if( n != 0 )
{
while( --n != 0 )
{
if( ( *d++ = *s++ ) == '\0' )
break;
}
}
/* Not enough room in dst, add NUL and traverse rest of src */
if( n == 0 )
{
if( siz != 0 )
*d = '\0'; /* NUL-terminate dst */
while( *s++ )
;
}
return s - (char*)src - 1; /* count does not include NUL */
#endif
}
/***
****
***/
double
tr_getRatio( double numerator,
double denominator )
{
double ratio;
if( denominator )
ratio = numerator / denominator;
else if( numerator )
ratio = TR_RATIO_INF;
else
ratio = TR_RATIO_NA;
return ratio;
}
void
tr_sha1_to_hex( char * out,
const uint8_t * sha1 )
{
static const char hex[] = "0123456789abcdef";
int i;
for( i = 0; i < 20; i++ )
{
unsigned int val = *sha1++;
*out++ = hex[val >> 4];
*out++ = hex[val & 0xf];
}
*out = '\0';
}
/***
****
***/
int
tr_httpIsValidURL( const char * url )
{
const char * c;
static const char * rfc2396_valid_chars =
"abcdefghijklmnopqrstuvwxyz" /* lowalpha */
"ABCDEFGHIJKLMNOPQRSTUVWXYZ" /* upalpha */
"0123456789" /* digit */
"-_.!~*'()" /* mark */
";/?:@&=+$," /* reserved */
"<>#%<\"" /* delims */
"{}|\\^[]`"; /* unwise */
if( url == NULL )
return FALSE;
for( c = url; c && *c; ++c )
if( !strchr( rfc2396_valid_chars, *c ) )
return FALSE;
return !tr_httpParseURL( url, -1, NULL, NULL, NULL );
}
int
tr_httpParseURL( const char * url_in,
int len,
char ** setme_host,
int * setme_port,
char ** setme_path )
{
int err;
int port = 0;
int n;
char * tmp;
char * pch;
const char * protocol = NULL;
const char * host = NULL;
const char * path = NULL;
tmp = tr_strndup( url_in, len );
if( ( pch = strstr( tmp, "://" ) ) )
{
*pch = '\0';
protocol = tmp;
pch += 3;
/*fprintf( stderr, "protocol is [%s]... what's left is [%s]\n", protocol, pch
);*/
if( ( n = strcspn( pch, ":/" ) ) )
{
const int havePort = pch[n] == ':';
host = pch;
pch += n;
*pch++ = '\0';
/*fprintf( stderr, "host is [%s]... what's left is [%s]\n", host, pch );*/
if( havePort )
{
char * end;
port = strtol( pch, &end, 10 );
pch = end;
/*fprintf( stderr, "port is [%d]... what's left is [%s]\n", port, pch );*/
}
path = pch;
/*fprintf( stderr, "path is [%s]\n", path );*/
}
}
err = !host || !path || !protocol
|| ( strcmp( protocol, "http" ) && strcmp( protocol, "https" ) );
if( !err && !port )
{
if( !strcmp( protocol, "http" ) ) port = 80;
if( !strcmp( protocol, "https" ) ) port = 443;
}
if( !err )
{
if( setme_host ){ ( (char*)host )[-3] = ':'; *setme_host =
tr_strdup( protocol ); }
if( setme_path ){ ( (char*)path )[-1] = '/'; *setme_path =
tr_strdup( path - 1 ); }
if( setme_port ) *setme_port = port;
}
tr_free( tmp );
return err;
}
#include <string.h>
#include <openssl/sha.h>
#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <openssl/bio.h>
#include <openssl/buffer.h>
char *
tr_base64_encode( const void * input,
int length,
int * setme_len )
{
char * ret;
BIO * b64;
BIO * bmem;
BUF_MEM * bptr;
if( length < 1 )
length = strlen( input );
bmem = BIO_new( BIO_s_mem( ) );
b64 = BIO_new( BIO_f_base64( ) );
b64 = BIO_push( b64, bmem );
BIO_write( b64, input, length );
(void) BIO_flush( b64 );
BIO_get_mem_ptr( b64, &bptr );
ret = tr_strndup( bptr->data, bptr->length );
if( setme_len )
*setme_len = bptr->length;
BIO_free_all( b64 );
return ret;
}
char *
tr_base64_decode( const void * input,
int length,
int * setme_len )
{
char * ret;
BIO * b64;
BIO * bmem;
int retlen;
if( length < 1 )
length = strlen( input );
ret = tr_new0( char, length );
b64 = BIO_new( BIO_f_base64( ) );
bmem = BIO_new_mem_buf( (unsigned char*)input, length );
bmem = BIO_push( b64, bmem );
retlen = BIO_read( bmem, ret, length );
if( !retlen )
{
/* try again, but with the BIO_FLAGS_BASE64_NO_NL flag */
BIO_free_all( bmem );
b64 = BIO_new( BIO_f_base64( ) );
BIO_set_flags( b64, BIO_FLAGS_BASE64_NO_NL );
bmem = BIO_new_mem_buf( (unsigned char*)input, length );
bmem = BIO_push( b64, bmem );
retlen = BIO_read( bmem, ret, length );
}
if( setme_len )
*setme_len = retlen;
BIO_free_all( bmem );
return ret;
}
int
tr_ptr2int( void* v )
{
return (intptr_t)v;
}
void*
tr_int2ptr( int i )
{
return (void*)(intptr_t)i;
}
/***
****
***/
static tr_list * _bufferList = NULL;
static tr_lock *
getBufferLock( void )
{
static tr_lock * lock = NULL;
if( lock == NULL )
lock = tr_lockNew( );
return lock;
}
struct evbuffer*
tr_getBuffer( void )
{
struct evbuffer * buf;
tr_lock * l = getBufferLock( );
tr_lockLock( l );
buf = tr_list_pop_front( &_bufferList );
if( buf == NULL )
buf = evbuffer_new( );
tr_lockUnlock( l );
return buf;
}
void
tr_releaseBuffer( struct evbuffer * buf )
{
tr_lock * l = getBufferLock( );
tr_lockLock( l );
evbuffer_drain( buf, EVBUFFER_LENGTH( buf ) );
assert( EVBUFFER_LENGTH( buf ) == 0 );
tr_list_prepend( &_bufferList, buf );
tr_lockUnlock( l );
}
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