fontconfig/src/fclang.c

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/*
* $XFree86: xc/lib/fontconfig/fc-lang/fclang.tmpl.c,v 1.1 2002/07/06 23:21:36 keithp Exp $
*
* Copyright <EFBFBD> 2002 Keith Packard, member of The XFree86 Project, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "fcint.h"
typedef struct {
FcChar8 *lang;
FcCharSet charset;
} FcLangCharSet;
#include "../fc-lang/fclang.h"
#define NUM_LANG_CHAR_SET (sizeof (fcLangCharSets) / sizeof (fcLangCharSets[0]))
FcBool
FcFreeTypeSetLang (FcPattern *pattern,
FcCharSet *charset,
const FcChar8 *exclusiveLang)
{
int i;
FcChar32 missing;
FcBool hasLang = FcFalse;
const FcCharSet *exclusiveCharset = 0;
if (exclusiveLang)
exclusiveCharset = FcCharSetForLang (exclusiveLang);
for (i = 0; i < NUM_LANG_CHAR_SET; i++)
{
/*
* Check for Han charsets to make fonts
* which advertise support for a single language
* not support other Han languages
*/
if (exclusiveCharset &&
FcFreeTypeIsExclusiveLang (fcLangCharSets[i].lang) &&
fcLangCharSets[i].charset.leaves != exclusiveCharset->leaves)
{
continue;
}
missing = FcCharSetSubtractCount (&fcLangCharSets[i].charset, charset);
if (FcDebug() & FC_DBG_SCANV)
printf ("%s(%d) ", fcLangCharSets[i].lang, missing);
if (!missing)
{
if (!FcPatternAddString (pattern, FC_LANG, fcLangCharSets[i].lang))
return FcFalse;
hasLang = FcTrue;
}
}
/*
* Make sure it has a lang entry
*/
if (!hasLang)
if (!FcPatternAddString (pattern, FC_LANG, (FcChar8 *) "x-unknown"))
return FcFalse;
if (FcDebug() & FC_DBG_SCANV)
printf ("\n");
return FcTrue;
}
FcLangResult
FcLangCompare (const FcChar8 *s1, const FcChar8 *s2)
{
const FcChar8 *orig_s1 = s1;
FcChar8 c1, c2;
FcLangResult result;
/*
* Compare ISO 639 language codes
*/
for (;;)
{
c1 = *s1++;
c2 = *s2++;
if (c1 == '\0' || c1 == '-')
break;
if (c2 == '\0' || c2 == '-')
break;
c1 = FcToLower (c1);
c2 = FcToLower (c2);
if (c1 != c2)
return FcLangDifferentLang; /* mismatching lang code */
}
if (!c1 && !c2)
return FcLangEqual;
/*
* Make x-* mismatch as if the lang part didn't match
*/
result = FcLangDifferentCountry;
if (orig_s1[0] == 'x' && (orig_s1[1] == '\0' || orig_s1[1] == '-'))
result = FcLangDifferentLang;
if (c1 == '\0' || c2 == '\0')
return result;
/*
* Compare ISO 3166 country codes
*/
for (;;)
{
c1 = *s1++;
c2 = *s2++;
if (!c1 || !c2)
break;
c1 = FcToLower (c1);
c2 = FcToLower (c2);
if (c1 != c2)
break;
}
if (c1 == c2)
return FcLangEqual;
else
return result;
}
const FcCharSet *
FcCharSetForLang (const FcChar8 *lang)
{
int i;
int country = -1;
for (i = 0; i < NUM_LANG_CHAR_SET; i++)
{
switch (FcLangCompare (lang, fcLangCharSets[i].lang)) {
case FcLangEqual:
return &fcLangCharSets[i].charset;
case FcLangDifferentCountry:
if (country == -1)
country = i;
default:
break;
}
}
if (country == -1)
return 0;
return &fcLangCharSets[i].charset;
}