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VLC Source 0.5.3.dmg
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src
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extras
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libc.c
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C/C++ Source or Header
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2003-04-07
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7KB
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226 lines
/*****************************************************************************
* libc.c: Extra libc function for some systems.
*****************************************************************************
* Copyright (C) 2002 VideoLAN
* $Id: libc.c,v 1.7 2003/02/08 22:20:28 massiot Exp $
*
* Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
* Samuel Hocevar <sam@zoy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include <string.h> /* strdup() */
#include <stdlib.h>
#include <vlc/vlc.h>
/*****************************************************************************
* getenv: just in case, but it should never be called
*****************************************************************************/
#if !defined( HAVE_GETENV )
char *vlc_getenv( const char *name )
{
return NULL;
}
#endif
/*****************************************************************************
* strdup: returns a malloc'd copy of a string
*****************************************************************************/
#if !defined( HAVE_STRDUP )
char *vlc_strdup( const char *string )
{
return strndup( string, strlen( string ) );
}
#endif
/*****************************************************************************
* strndup: returns a malloc'd copy of at most n bytes of string
* Does anyone know whether or not it will be present in Jaguar?
*****************************************************************************/
#if !defined( HAVE_STRNDUP )
char *vlc_strndup( const char *string, size_t n )
{
char *psz;
size_t len = strlen( string );
len = __MIN( len, n );
psz = (char*)malloc( len + 1 );
if( psz != NULL )
{
memcpy( (void*)psz, (const void*)string, len );
psz[ len ] = 0;
}
return psz;
}
#endif
/*****************************************************************************
* strcasecmp: compare two strings ignoring case
*****************************************************************************/
#if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
int vlc_strcasecmp( const char *s1, const char *s2 )
{
int i_delta = 0;
while( !i_delta && *s1 && *s2 )
{
i_delta = *s1 - *s2;
if( *s1 >= 'A' && *s1 <= 'Z' )
{
i_delta -= 'A' - 'a';
}
if( *s2 >= 'A' && *s2 <= 'Z' )
{
i_delta += 'A' - 'a';
}
s1++; s2++;
}
return i_delta;
}
#endif
/*****************************************************************************
* strncasecmp: compare n chars from two strings ignoring case
*****************************************************************************/
#if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
{
int i_delta = 0;
while( n-- && !i_delta && *s1 )
{
i_delta = *s1 - *s2;
if( *s1 >= 'A' && *s1 <= 'Z' )
{
i_delta -= 'A' - 'a';
}
if( *s2 >= 'A' && *s2 <= 'Z' )
{
i_delta += 'A' - 'a';
}
s1++; s2++;
}
return i_delta;
}
#endif
/*****************************************************************************
* atof: convert a string to a double.
*****************************************************************************/
#if !defined( HAVE_ATOF )
double vlc_atof( const char *nptr )
{
double f_result;
wchar_t *psz_tmp;
int i_len = strlen( nptr ) + 1;
psz_tmp = malloc( i_len * sizeof(wchar_t) );
MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
f_result = wcstod( psz_tmp, NULL );
free( psz_tmp );
return f_result;
}
#endif
/*****************************************************************************
* lseek: reposition read/write file offset.
*****************************************************************************
* FIXME: this cast sucks!
*****************************************************************************/
#if !defined( HAVE_LSEEK )
off_t vlc_lseek( int fildes, off_t offset, int whence )
{
return SetFilePointer( (HANDLE)fildes, (long)offset, NULL, whence );
}
#endif
/*****************************************************************************
* dgettext: gettext for plugins.
*****************************************************************************/
char *vlc_dgettext( const char *package, const char *msgid )
{
#if defined( ENABLE_NLS ) \
&& ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
return dgettext( package, msgid );
#else
return (char *)msgid;
#endif
}
/*****************************************************************************
* wraptext: insert \n at convenient places. CAUTION: modifies its argument
*****************************************************************************/
char *vlc_wraptext( char *psz_text, size_t i_line )
{
size_t i_len = strlen(psz_text);
char * psz_line = psz_text;
while ( i_len > i_line )
{
/* Look if there is a newline somewhere. */
char * psz_parser = psz_line;
while ( psz_parser <= psz_line + i_line && *psz_parser != '\n' )
{
psz_parser++;
}
if ( *psz_parser == '\n' )
{
i_len -= psz_parser + 1 - psz_line;
psz_line = psz_parser + 1;
continue;
}
/* Find the furthest space. */
psz_parser = psz_line + i_line;
while ( psz_parser > psz_line && *psz_parser != ' ' )
{
psz_parser--;
}
if ( *psz_parser == ' ' )
{
*psz_parser = '\n';
i_len -= psz_parser + 1 - psz_line;
psz_line = psz_parser + 1;
continue;
}
/* Wrapping has failed. Find the first space or newline after i_line. */
psz_parser = psz_line + i_line + 1;
while ( psz_parser < psz_line + i_len
&& *psz_parser != ' ' && *psz_parser != '\n' )
{
psz_parser++;
}
if ( psz_parser < psz_line + i_len ) *psz_parser = '\n';
i_len -= psz_parser + 1 - psz_line;
psz_line = psz_parser + 1;
}
return psz_text;
}