/*
- * $XFree86: xc/lib/fontconfig/src/fclang.c,v 1.7 2002/08/26 23:34:31 keithp Exp $
+ * $RCSId: xc/lib/fontconfig/src/fclang.c,v 1.7 2002/08/26 23:34:31 keithp Exp $
*
- * Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
+ * Copyright © 2002 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
FcCharSet charset;
} FcLangCharSet;
+typedef struct {
+ int begin;
+ int end;
+} FcLangCharSetRange;
+
#include "../fc-lang/fclang.h"
struct _FcLangSet {
}
}
+/*
+ * Return FcTrue when s1 contains s2.
+ *
+ * s1 contains s2 if s1 equals s2 or if s1 is a
+ * language with a country and s2 is just a language
+ */
+
+static FcBool
+FcLangContains (const FcChar8 *s1, const FcChar8 *s2)
+{
+ FcChar8 c1, c2;
+
+ for (;;)
+ {
+ c1 = *s1++;
+ c2 = *s2++;
+
+ c1 = FcToLower (c1);
+ c2 = FcToLower (c2);
+ if (c1 != c2)
+ {
+ /* see if s1 has a country while s2 is mising one */
+ if (c1 == '-' && c2 == '\0')
+ return FcTrue;
+ return FcFalse;
+ }
+ else if (!c1)
+ return FcTrue;
+ }
+}
+
const FcCharSet *
FcCharSetForLang (const FcChar8 *lang)
{
{
int low, high, mid;
int cmp;
+ FcChar8 firstChar = FcToLower(lang[0]);
+
+ if (firstChar < 'a')
+ {
+ low = 0;
+ high = fcLangCharSetRanges[0].begin;
+ }
+ else if(firstChar > 'z')
+ {
+ low = fcLangCharSetRanges[25].begin;
+ high = NUM_LANG_CHAR_SET - 1;
+ }
+ else
+ {
+ low = fcLangCharSetRanges[firstChar - 'a'].begin;
+ high = fcLangCharSetRanges[firstChar - 'a'].end;
+ /* no matches */
+ if (low > high)
+ return -low; /* next entry after where it would be */
+ }
- low = 0;
- high = NUM_LANG_CHAR_SET - 1;
while (low <= high)
{
mid = (high + low) >> 1;
- cmp = FcStrCmpIgnoreCase (fcLangCharSets[mid].lang, lang);
- if (cmp == 0)
+ if(fcLangCharSets[mid].lang[0] != firstChar)
+ cmp = FcStrCmpIgnoreCase(fcLangCharSets[mid].lang, lang);
+ else
+ { /* fast path for resolving 2-letter languages (by far the most common) after
+ * finding the first char (probably already true because of the hash table) */
+ FcChar8 secondChar = FcToLower(lang[1]);
+ if (fcLangCharSets[mid].lang[1] > secondChar) // check second chars
+ {
+ high = mid - 1;
+ continue;
+ }
+ else if (fcLangCharSets[mid].lang[1] < secondChar)
+ {
+ low = mid + 1;
+ continue;
+ }
+ else if (fcLangCharSets[mid].lang[2] == '\0' && lang[2] == '\0')
+ return mid;
+
+ else /* identical through the first two charcters, but at least one string didn't end there */
+ cmp = FcStrCmpIgnoreCase(fcLangCharSets[mid].lang+2, lang+2);
+ }
+ if (cmp == 0)
return mid;
if (cmp < 0)
low = mid + 1;
FcLangSet *
FcNameParseLangSet (const FcChar8 *string)
{
- FcChar8 lang[32];
- const FcChar8 *end, *next;
+ FcChar8 lang[32],c;
+ int i;
FcLangSet *ls;
ls = FcLangSetCreate ();
if (!ls)
goto bail0;
- while (string && *string)
+ for(;;)
{
- end = (FcChar8 *) strchr ((char *) string, '|');
- if (!end)
- {
- end = string + strlen ((char *) string);
- next = end;
- }
- else
- next = end + 1;
- if (end - string < sizeof (lang) - 1)
+ for(i = 0; i < 31;i++)
{
- strncpy ((char *) lang, (char *) string, end - string);
- lang[end-string] = '\0';
- if (!FcLangSetAdd (ls, lang))
- goto bail1;
+ c = *string++;
+ if(c == '\0' || c == '|')
+ break; /* end of this code */
+ lang[i] = c;
}
- string = next;
+ lang[i] = '\0';
+ if (!FcLangSetAdd (ls, lang))
+ goto bail1;
+ if(c == '\0')
+ break;
}
return ls;
bail1:
if (!first)
if (!FcStrBufChar (buf, '|'))
return FcFalse;
- if (!FcStrBufString (buf, extra));
+ if (!FcStrBufString (buf, extra))
return FcFalse;
first = FcFalse;
}
return FcStrSetEqual (lsa->extra, lsb->extra);
return FcFalse;
}
+
+static FcBool
+FcLangSetContainsLang (const FcLangSet *ls, const FcChar8 *lang)
+{
+ int id;
+ FcLangResult r;
+ int i;
+
+ id = FcLangSetIndex (lang);
+ if (id < 0)
+ id = -id - 1;
+ else if (FcLangSetBitGet (ls, id))
+ return FcTrue;
+ /*
+ * search up and down among equal languages for a match
+ */
+ for (i = id - 1; i >= 0; i--)
+ {
+ if (FcLangCompare (fcLangCharSets[i].lang, lang) == FcLangDifferentLang)
+ break;
+ if (FcLangSetBitGet (ls, i) &&
+ FcLangContains (fcLangCharSets[i].lang, lang))
+ return FcTrue;
+ }
+ for (i = id; i < NUM_LANG_CHAR_SET; i++)
+ {
+ if (FcLangCompare (fcLangCharSets[i].lang, lang) == FcLangDifferentLang)
+ break;
+ if (FcLangSetBitGet (ls, i) &&
+ FcLangContains (fcLangCharSets[i].lang, lang))
+ return FcTrue;
+ }
+ if (ls->extra)
+ {
+ FcStrList *list = FcStrListCreate (ls->extra);
+ FcChar8 *extra;
+ FcLangResult r;
+
+ if (list)
+ {
+ while ((extra = FcStrListNext (list)))
+ {
+ if (FcLangContains (extra, lang))
+ break;
+ }
+ FcStrListDone (list);
+ if (extra)
+ return FcTrue;
+ }
+ }
+ return FcFalse;
+}
+
+/*
+ * return FcTrue if lsa contains every language in lsb
+ */
+FcBool
+FcLangSetContains (const FcLangSet *lsa, const FcLangSet *lsb)
+{
+ int i, j;
+ FcChar32 missing;
+
+ if (FcDebug() & FC_DBG_MATCHV)
+ {
+ printf ("FcLangSet "); FcLangSetPrint (lsa);
+ printf (" contains "); FcLangSetPrint (lsb);
+ printf ("\n");
+ }
+ /*
+ * check bitmaps for missing language support
+ */
+ for (i = 0; i < NUM_LANG_SET_MAP; i++)
+ {
+ missing = lsb->map[i] & ~lsa->map[i];
+ if (missing)
+ {
+ for (j = 0; j < 32; j++)
+ if (missing & (1 << j))
+ {
+ if (!FcLangSetContainsLang (lsa,
+ fcLangCharSets[i*32 + j].lang))
+ {
+ if (FcDebug() & FC_DBG_MATCHV)
+ printf ("\tMissing bitmap %s\n", fcLangCharSets[i*32+j].lang);
+ return FcFalse;
+ }
+ }
+ }
+ }
+ if (lsb->extra)
+ {
+ FcStrList *list = FcStrListCreate (lsb->extra);
+ FcChar8 *extra;
+
+ if (list)
+ {
+ while ((extra = FcStrListNext (list)))
+ {
+ if (!FcLangSetContainsLang (lsa, extra))
+ {
+ if (FcDebug() & FC_DBG_MATCHV)
+ printf ("\tMissing string %s\n", extra);
+ break;
+ }
+ }
+ FcStrListDone (list);
+ if (extra)
+ return FcFalse;
+ }
+ }
+ return FcTrue;
+}
projects / fontconfig.git / commitdiff