charset.c

uclinux 下的vlc播放器源代码

    if( !strcasecmp(psz_codeset, "UTF8") || !strcasecmp(psz_codeset, "UTF-8") )
        return VLC_TRUE;

    return VLC_FALSE;
}

char *__vlc_fix_readdir_charset( vlc_object_t *p_this, const char *psz_string )
{
#ifdef __APPLE__
    if ( p_this->p_libvlc->iconv_macosx != (vlc_iconv_t)-1 )
    {
        const char *psz_in = psz_string;
        size_t i_in = strlen(psz_in);
        size_t i_out = i_in * 2;
        char *psz_utf8 = malloc(i_out + 1);
        char *psz_out = psz_utf8;

        vlc_mutex_lock( &p_this->p_libvlc->iconv_lock );
        size_t i_ret = vlc_iconv( p_this->p_libvlc->iconv_macosx,
                                  &psz_in, &i_in, &psz_out, &i_out );
        vlc_mutex_unlock( &p_this->p_libvlc->iconv_lock );
        if( i_ret == (size_t)-1 || i_in )
        {
            msg_Warn( p_this,
                      "failed to convert \"%s\" from HFS+ charset (%s)",
                      psz_string, strerror(errno) );
            free( psz_utf8 );
            return strdup( psz_string );
        }

        *psz_out = '\0';
        return psz_utf8;
    }
#endif

    (void)p_this;
    return strdup( psz_string );
}

/**
 * @return a fallback characters encoding to be used, given a locale.
 */
const char *FindFallbackEncoding( const char *locale )
{
    if( ( locale == NULL ) || ( strlen( locale ) < 2 ) )
        return "ASCII";

    switch( U16_AT( locale ) )
    {
        /*** The ISO-8859 series (anything but Asia) ***/
        /* Latin-1 Western-European languages (ISO-8859-1) */
        case 'aa':
        case 'af':
        case 'an':
        case 'br':
        case 'ca':
        case 'da':
        case 'de':
        case 'en':
        case 'es':
        case 'et':
        case 'eu':
        case 'fi':
        case 'fo':
        case 'fr':
        case 'ga':
        case 'gd':
        case 'gl':
        case 'gv':
        case 'id':
        case 'is':
        case 'it':
        case 'kl':
        case 'kw':
        case 'mg':
        case 'ms':
        case 'nb':
        case 'nl':
        case 'nn':
        case 'no':
        case 'oc':
        case 'om':
        case 'pt':
        case 'so':
        case 'sq':
        case 'st':
        case 'sv':
        case 'tl':
        case 'uz':
        case 'wa':
        case 'xh':
        case 'zu':
            /* Compatible Microsoft superset */
            return "CP1252";

        /* Latin-2 Slavic languages (ISO-8859-2) */
        case 'bs':
        case 'cs':
        case 'hr':
        case 'hu':
        case 'pl':
        case 'ro':
        case 'sk':
        case 'sl':
            /* CP1250 is more common, but incompatible */
            return "CP1250";

        /* Latin-3 Southern European languages (ISO-8859-3) */
        case 'eo':
        case 'mt':
        /*case 'tr': Turkish uses ISO-8859-9 instead */
            return "ISO-8859-3";

        /* Latin-4 North-European languages (ISO-8859-4) */
        /* All use Latin-1 or Latin-6 instead */

        /* Cyrillic alphabet languages (ISO-8859-5) */
        case 'be':
        case 'bg':
        case 'mk':
        case 'ru':
        case 'sr':
            /* KOI8, ISO-8859-5 and CP1251 are supposedly incompatible */
            return "CP1251";

        /* Arabic (ISO-8859-6) */
        case 'ar':
            /* FIXME: someone check if we should return CP1256
             * or ISO-8859-6 */
            /* CP1256 is(?) more common, but incompatible(?) */
            return "CP1256";

        /* Greek (ISO-8859-7) */
        case 'el':
            /* FIXME: someone check if we should return CP1253
            * or ISO-8859-7 */
            /* CP1253 is(?) more common and partially compatible */
            return "CP1253";

        /* Hebrew (ISO-8859-8) */
        case 'he':
        case 'iw':
        case 'yi':
            /* Compatible Microsoft superset */
            return "CP1255";

        /* Latin-5 Turkish (ISO-8859-9) */
        case 'tr':
        case 'ku':
            /* Compatible Microsoft superset */
            return "CP1254";

        /* Latin-6 “North-European” languages (ISO-8859-10) */
        /* It is so much north European that glibc only uses that for Luganda
         * which is spoken in Uganda... unless someone complains, I'm not
         * using this one; let's fallback to CP1252 here. */
        /* ISO-8859-11 does arguably not exist. Thai is handled below. */
        /* ISO-8859-12 really doesn't exist. */

        /* Latin-7 Baltic languages (ISO-8859-13) */
        case 'lt':
        case 'lv':
        case 'mi': /* FIXME: ??? that's in New Zealand, doesn't sound baltic */
            /* Compatible Microsoft superset */
            return "CP1257";

        /* Latin-8 Celtic languages (ISO-8859-14) */
        case 'cy':
            return "ISO-8859-14";

        /* Latin-9 (ISO-8859-15) -> see Latin-1 */
        /* Latin-10 (ISO-8859-16) does not seem to be used */

        /* KOI series */
        /* For Russian, we use CP1251 */
        case 'uk':
            return "KOI8-U";
        case 'tg':
            return "KOI8-T";

        /*** Asia ***/
        case 'jp': /* Japanese */
            /* Shift-JIS is way more common than EUC-JP */
            return "SHIFT-JIS";
        case 'ko': /* Korean */
            return "EUC-KR";
        case 'th': /* Thai */
            return "TIS-620";
        case 'vt': /* Vietnamese FIXME: infos needed */
            /* VISCII is probably a bad idea as it is not extended ASCII */
            /* glibc has TCVN5712-1, but I could find no infos on this one */
            return "CP1258";

        case 'kk': /* Kazakh FIXME: infos needed */
            return "PT154";

        case 'zh': /* Chinese, charset is country dependant */
            if( ( strlen( locale ) >= 5 ) && ( locale[2] != '_' ) )
                switch( U16_AT( locale + 3 ) )
                {
                    case 'HK': /* Hong Kong */
                        /* FIXME: use something else? */
                        return "BIG5-HKSCS";

                    case 'TW': /* Taiwan */
                        return "BIG5";
                }
            /* People's Republic of China */
            /* Singapore */
            /*
             * GB18030 can represent any Unicode code point
             * (like UTF-8), while remaining compatible with GBK
             * FIXME: is it compatible with GB2312? if not, should we
             * use GB2312 instead?
             */
            return "GB18030";
    }

    return "ASCII";
}

/**
 * GetFallbackEncoding() suggests an encoding to be used for non UTF-8
 * text files accord to the system's local settings. It is only a best
 * guess.
 */
const char *GetFallbackEncoding( void )
{
#ifndef WIN32
    const char *psz_lang = NULL;

    /* Some systems (like Darwin, SunOS 4 or DJGPP) have only the C locale.
     * Therefore we don't use setlocale here; it would return "C". */
#  if defined (HAVE_SETLOCALE) && !defined ( __APPLE__)
    psz_lang = setlocale( LC_ALL, NULL );
#  endif
    if( psz_lang == NULL || psz_lang[0] == '\0' )
    {
        psz_lang = getenv( "LC_ALL" );
        if( psz_lang == NULL || psz_lang == '\0' )
        {
            psz_lang = getenv( "LC_CTYPE" );
            if( psz_lang == NULL || psz_lang[0] == '\0')
                psz_lang = getenv( "LANG" );
        }
    }

    return FindFallbackEncoding( psz_lang );
#else
    /*
     * This should be thread-safe given GetACP() should always return
     * the same result.
     */
    static char buf[2 + 10 + 1] = "";

    if( buf[0] == 0 )
        snprintf( buf, sizeof( buf ), "CP%u", GetACP() );
    return buf;
#endif
}

/**
 * There are two decimal separators in the computer world-wide locales:
 * dot (which is the american default), and comma (which is used in France,
 * the country with the most VLC developers, among others).
 *
 * i18n_strtod() has the same prototype as ANSI C strtod() but it accepts
 * either decimal separator when deserializing the string to a float number,
 * independant of the local computer setting.
 */
double i18n_strtod( const char *str, char **end )
{
    char *end_buf, e;
    double d;

    if( end == NULL )
        end = &end_buf;
    d = strtod( str, end );

    e = **end;
    if(( e == ',' ) || ( e == '.' ))
    {
        char dup[strlen( str ) + 1];
        strcpy( dup, str );

        if( dup == NULL )
            return d;

        dup[*end - str] = ( e == ',' ) ? '.' : ',';
        d = strtod( dup, end );
    }
    return d;
}

/**
 * i18n_atof() has the same prototype as ANSI C atof() but it accepts
 * either decimal separator when deserializing the string to a float number,
 * independant of the local computer setting.
 */
double i18n_atof( const char *str )
{
    return i18n_strtod( str, NULL );
}


/**
 * us_strtod() has the same prototype as ANSI C strtod() but it expects
 * a dot as decimal separator regardless of the system locale.
 */
double us_strtod( const char *str, char **end )
{
    char dup[strlen( str ) + 1], *ptr;
    double d;
    strcpy( dup, str );

    ptr = strchr( dup, ',' );
    if( ptr != NULL )
        *ptr = '\0';

    d = strtod( dup, &ptr );
    if( end != NULL )
        *end = (char *)&str[ptr - dup];

    return d;
}

/**
 * us_atof() has the same prototype as ANSI C atof() but it expects a dot
 * as decimal separator, regardless of the system locale.
 */
double us_atof( const char *str )
{
    return us_strtod( str, NULL );
}