src/text/charset.c

   1 /*****************************************************************************
   2  * charset.c: Locale's character encoding stuff.
   3  *****************************************************************************
   4  * See also unicode.c for Unicode to locale conversion helpers.
   5  *
   6  * Copyright (C) 2003-2008 VLC authors and VideoLAN
   7  *
   8  * Authors: Christophe Massiot
   9  *          Rémi Denis-Courmont
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU Lesser General Public License as published by
  13  * the Free Software Foundation; either version 2.1 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public License
  22  * along with this program; if not, write to the Free Software Foundation,
  23  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <vlc_common.h>
  31
  32 #if !defined _WIN32
  33 # include <locale.h>
  34 #else
  35 # include <windows.h>
  36 #endif
  37
  38 #ifdef __APPLE__
  39 #   include <string.h>
  40 #   include <xlocale.h>
  41 #endif
  42
  43 #include "libvlc.h"
  44 #include <vlc_charset.h>
  45
  46 /**
  47  * us_strtod() has the same prototype as ANSI C strtod() but it uses the
  48  * POSIX/C decimal format, regardless of the current numeric locale.
  49  */
  50 double us_strtod( const char *str, char **end )
  51 {
  52     locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
  53     locale_t oldloc = uselocale (loc);
  54     double res = strtod (str, end);
  55
  56     if (loc != (locale_t)0)
  57     {
  58         uselocale (oldloc);
  59         freelocale (loc);
  60     }
  61     return res;
  62 }
  63
  64
  65 /**
  66  * us_strtof() has the same prototype as ANSI C strtof() but it uses the
  67  * POSIX/C decimal format, regardless of the current numeric locale.
  68  */
  69 float us_strtof( const char *str, char **end )
  70 {
  71     locale_t loc = newlocale (LC_NUMERIC_MASK, "C", NULL);
  72     locale_t oldloc = uselocale (loc);
  73     float res = strtof (str, end);
  74
  75     if (loc != (locale_t)0)
  76     {
  77         uselocale (oldloc);
  78         freelocale (loc);
  79     }
  80     return res;
  81 }
  82
  83
  84 /**
  85  * us_atof() has the same prototype as ANSI C atof() but it expects a dot
  86  * as decimal separator, regardless of the system locale.
  87  */
  88 double us_atof( const char *str )
  89 {
  90     return us_strtod( str, NULL );
  91 }
  92
  93
  94 /**
  95  * us_vasprintf() has the same prototype as vasprintf(), but doesn't use
  96  * the system locale.
  97  */
  98 int us_vasprintf( char **ret, const char *format, va_list ap )
  99 {
 100     locale_t loc = newlocale( LC_NUMERIC_MASK, "C", NULL );
 101     locale_t oldloc = uselocale( loc );
 102
 103     int i_rc = vasprintf( ret, format, ap );
 104
 105     if ( loc != (locale_t)0 )
 106     {
 107         uselocale( oldloc );
 108         freelocale( loc );
 109     }
 110
 111     return i_rc;
 112 }
 113
 114
 115 /**
 116  * us_asprintf() has the same prototype as asprintf(), but doesn't use
 117  * the system locale.
 118  */
 119 int us_asprintf( char **ret, const char *format, ... )
 120 {
 121     va_list ap;
 122     int i_rc;
 123
 124     va_start( ap, format );
 125     i_rc = us_vasprintf( ret, format, ap );
 126     va_end( ap );
 127
 128     return i_rc;
 129 }