transmission/libtransmission/utils.c

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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.
*****************************************************************************/
#include "transmission.h"
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#define SPRINTF_BUFSIZE 100
static tr_lock_t * messageLock = NULL;
static int messageLevel = 0;
static int messageQueuing = 0;
static tr_msg_list_t * messageQueue = NULL;
static tr_msg_list_t ** messageQueueTail = &messageQueue;
void tr_msgInit( void )
{
if( NULL == messageLock )
{
messageLock = calloc( 1, sizeof( *messageLock ) );
tr_lockInit( messageLock );
}
}
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( int enabled )
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{
tr_msgInit();
tr_lockLock( messageLock );
messageQueuing = enabled;
tr_lockUnlock( messageLock );
}
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tr_msg_list_t * tr_getQueuedMessages( void )
{
tr_msg_list_t * ret;
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assert( NULL != messageLock );
tr_lockLock( messageLock );
ret = messageQueue;
messageQueue = NULL;
messageQueueTail = &messageQueue;
tr_lockUnlock( messageLock );
return ret;
}
void tr_freeMessageList( tr_msg_list_t * list )
{
tr_msg_list_t * next;
while( NULL != list )
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{
next = list->next;
free( list->message );
free( list );
list = next;
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}
}
void tr_msg( int level, char * msg, ... )
{
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va_list args1, args2;
tr_msg_list_t * newmsg;
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int len1, len2;
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assert( NULL != messageLock );
tr_lockLock( messageLock );
if( !messageLevel )
{
char * env;
env = getenv( "TR_DEBUG" );
messageLevel = ( env ? atoi( env ) : 0 ) + 1;
messageLevel = MAX( 1, messageLevel );
}
if( messageLevel >= level )
{
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va_start( args1, msg );
if( messageQueuing )
{
newmsg = calloc( 1, sizeof( *newmsg ) );
if( NULL != newmsg )
{
newmsg->level = level;
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newmsg->when = time( NULL );
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len1 = len2 = 0;
va_start( args2, msg );
tr_vsprintf( &newmsg->message, &len1, &len2, msg,
args1, args2 );
va_end( args2 );
if( NULL == newmsg->message )
{
free( newmsg );
}
else
{
*messageQueueTail = newmsg;
messageQueueTail = &newmsg->next;
}
}
}
else
{
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vfprintf( stderr, msg, args1 );
fputc( '\n', stderr );
}
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va_end( args1 );
}
tr_lockUnlock( messageLock );
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}
int tr_rand( int sup )
{
static int init = 0;
if( !init )
{
srand( tr_date() );
init = 1;
}
return rand() % sup;
}
void * tr_memmem( const void *vbig, size_t big_len,
const void *vlittle, size_t little_len )
{
const char *big = vbig;
const char *little = vlittle;
size_t ii, jj;
if( 0 == big_len || 0 == little_len )
{
return NULL;
}
for( ii = 0; ii + little_len <= big_len; ii++ )
{
for( jj = 0; jj < little_len; jj++ )
{
if( big[ii + jj] != little[jj] )
{
break;
}
}
if( jj == little_len )
{
return (char*)big + ii;
}
}
return NULL;
}
int tr_mkdir( char * path )
{
char * p, * pp;
struct stat sb;
int done;
p = path;
while( '/' == *p )
p++;
pp = p;
done = 0;
while( ( p = strchr( pp, '/' ) ) || ( p = strchr( pp, '\0' ) ) )
{
if( '\0' == *p)
{
done = 1;
}
else
{
*p = '\0';
}
if( stat( path, &sb ) )
{
/* Folder doesn't exist yet */
if( mkdir( path, 0777 ) )
{
tr_err( "Could not create directory %s (%s)", path,
strerror( errno ) );
*p = '/';
return 1;
}
}
else if( ( sb.st_mode & S_IFMT ) != S_IFDIR )
{
/* Node exists but isn't a folder */
tr_err( "Remove %s, it's in the way.", path );
*p = '/';
return 1;
}
if( done )
{
break;
}
*p = '/';
p++;
pp = p;
}
return 0;
}
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#define UPPER( cc ) \
( 'a' <= (cc) && 'z' >= (cc) ? (cc) - ( 'a' - 'A' ) : (cc) )
int tr_strncasecmp( const char * first, const char * second, int len )
{
int ii;
char firstchar, secondchar;
if( 0 > len )
{
len = strlen( first );
ii = strlen( second );
len = MIN( len, ii );
}
for( ii = 0; ii < len; ii++ )
{
if( first[ii] != second[ii] )
{
firstchar = UPPER( first[ii] );
secondchar = UPPER( second[ii] );
if( firstchar > secondchar )
{
return 1;
}
else if( firstchar < secondchar )
{
return -1;
}
}
if( '\0' == first[ii] )
{
/* if first[ii] is '\0' then second[ii] is too */
return 0;
}
}
return 0;
}
int tr_sprintf( char ** buf, int * used, int * max, const char * format, ... )
{
va_list ap1, ap2;
int ret;
va_start( ap1, format );
va_start( ap2, format );
ret = tr_vsprintf( buf, used, max, format, ap1, ap2 );
va_end( ap2 );
va_end( ap1 );
return ret;
}
int tr_vsprintf( char ** buf, int * used, int * max, const char * fmt,
va_list ap1, va_list ap2 )
{
int want;
want = vsnprintf( NULL, 0, fmt, ap1 );
if( tr_concat( buf, used, max, NULL, want ) )
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{
return 1;
}
assert( *used + want + 1 <= *max );
*used += vsnprintf( *buf + *used, *max - *used, fmt, ap2 );
return 0;
}
int tr_concat( char ** buf, int * used, int * max, const char * data, int len )
{
int newmax;
char * newbuf;
newmax = *max;
while( *used + len + 1 > newmax )
{
newmax += SPRINTF_BUFSIZE;
}
if( newmax > *max )
{
newbuf = realloc( *buf, newmax );
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if( NULL == newbuf )
{
return 1;
}
*buf = newbuf;
*max = newmax;
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}
if( NULL != data )
{
memcpy( *buf + *used, data, len );
*used += len;
}
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return 0;
}
char *
tr_dupstr( const char * base, int len )
{
char * ret;
ret = malloc( len + 1 );
if( NULL != ret )
{
memcpy( ret, base, len );
ret[len] = '\0';
}
return ret;
}
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char *
tr_errorString( int code )
{
switch( code )
{
case TR_OK:
return "No error";
case TR_ERROR:
return "Generic error";
case TR_ERROR_ASSERT:
return "Assert error";
case TR_ERROR_IO_PARENT:
return "Download folder does not exist";
case TR_ERROR_IO_PERMISSIONS:
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return "Insufficient permissions";
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case TR_ERROR_IO_OTHER:
return "Generic I/O error";
}
return "Unknown error";
}