fc-lang/fclang.tmpl.c

   1 /*
   2  * $XFree86$
   3  *
   4  * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26
  27 typedef struct {
  28     FcChar8     *lang;
  29     FcCharSet   charset;
  30 } FcLangCharSet;
  31
  32 @@@
  33
  34 #define NUM_LANG_CHAR_SET       (sizeof (fcLangCharSets) / sizeof (fcLangCharSets[0]))
  35
  36 FcBool
  37 FcFreeTypeSetLang (FcPattern *pattern, FcCharSet *charset)
  38 {
  39     int         i;
  40     FcChar32    missing;
  41
  42     for (i = 0; i < NUM_LANG_CHAR_SET; i++)
  43     {
  44         missing = FcCharSetSubtractCount (&fcLangCharSets[i].charset, charset);
  45         if (FcDebug() & FC_DBG_SCANV)
  46             printf ("%s(%d) ", fcLangCharSets[i].lang, missing);
  47         if (!missing && !FcFreeTypeHasLang (pattern, fcLangCharSets[i].lang))
  48             if (!FcPatternAddString (pattern, FC_LANG, fcLangCharSets[i].lang))
  49                 return FcFalse;
  50     }
  51     if (FcDebug() & FC_DBG_SCANV)
  52         printf ("\n");
  53     return FcTrue;
  54 }
  55
  56
  57 FcLangResult
  58 FcLangCompare (const FcChar8 *s1, const FcChar8 *s2)
  59 {
  60     const FcChar8   *orig_s1 = s1;
  61     FcChar8         c1, c2;
  62     FcLangResult    result;
  63     /*
  64      * Compare ISO 639 language codes
  65      */
  66     for (;;)
  67     {
  68         c1 = *s1++;
  69         c2 = *s2++;
  70         if (c1 == '\0' || c1 == '-')
  71             break;
  72         if (c2 == '\0' || c2 == '-')
  73             break;
  74         c1 = FcToLower (c1);
  75         c2 = FcToLower (c2);
  76         if (c1 != c2)
  77             return FcLangDifferentLang;     /* mismatching lang code */
  78     }
  79     if (!c1 && !c2)
  80         return FcLangEqual;
  81     /*
  82      * Make x-* mismatch as if the lang part didn't match
  83      */
  84     result = FcLangDifferentCountry;
  85     if (orig_s1[0] == 'x' && (orig_s1[1] == '\0' || orig_s1[1] == '-'))
  86         result = FcLangDifferentLang;
  87
  88     if (c1 == '\0' || c2 == '\0')
  89         return result;
  90     /*
  91      * Compare ISO 3166 country codes
  92      */
  93     for (;;)
  94     {
  95         c1 = *s1++;
  96         c2 = *s2++;
  97         if (!c1 || !c2)
  98             break;
  99         c1 = FcToLower (c1);
 100         c2 = FcToLower (c2);
 101         if (c1 != c2)
 102             break;
 103     }
 104     if (c1 == c2)
 105         return FcLangEqual;
 106     else
 107         return result;
 108 }
 109
 110 const FcCharSet *
 111 FcCharSetForLang (const FcChar8 *lang)
 112 {
 113     int         i;
 114     int         country = -1;
 115     for (i = 0; i < NUM_LANG_CHAR_SET; i++)
 116     {
 117         switch (FcLangCompare (lang, fcLangCharSets[i].lang)) {
 118         case FcLangEqual:
 119             return &fcLangCharSets[i].charset;
 120         case FcLangDifferentCountry:
 121             if (country == -1)
 122                 country = i;
 123         default:
 124             break;
 125         }
 126     }
 127     if (country == -1)
 128         return 0;
 129     return &fcLangCharSets[i].charset;
 130 }