src/fclist.c - third_party/fontconfig - Git at Google

 /*
  * $RCSId: xc/lib/fontconfig/src/fclist.c,v 1.11tsi Exp $
  *
  * Copyright © 2000 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
  * 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 <stdlib.h>
 #include "fcint.h"

 FcObjectSet *
 FcObjectSetCreate (void)
 {
     FcObjectSet    *os;

     os = (FcObjectSet *) malloc (sizeof (FcObjectSet));
     if (!os)
 	return 0;
     FcMemAlloc (FC_MEM_OBJECTSET, sizeof (FcObjectSet));
     os->nobject = 0;
     os->sobject = 0;
     os->objects = 0;
     return os;
 }

 FcBool
 FcObjectSetAdd (FcObjectSet *os, const char *object)
 {
     int		s;
     const char	**objects;
     int		high, low, mid, c;

     if (os->nobject == os->sobject)
     {
 	s = os->sobject + 4;
 	if (os->objects)
 	    objects = (const char **) realloc ((void *) os->objects,
 					       s * sizeof (const char *));
 	else
 	    objects = (const char **) malloc (s * sizeof (const char *));
 	if (!objects)
 	    return FcFalse;
 	if (os->sobject)
 	    FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *));
 	FcMemAlloc (FC_MEM_OBJECTPTR, s * sizeof (const char *));
 	os->objects = objects;
 	os->sobject = s;
     }
     high = os->nobject - 1;
     low = 0;
     mid = 0;
     c = 1;
     while (low <= high)
     {
 	mid = (low + high) >> 1;
 	c = strcmp (os->objects[mid], object);
 	if (c == 0)
 	    return FcTrue;
 	if (c < 0)
 	    low = mid + 1;
 	else
 	    high = mid - 1;
     }
     if (c < 0)
 	mid++;
     memmove (os->objects + mid + 1, os->objects + mid,
 	     (os->nobject - mid) * sizeof (const char *));
     os->objects[mid] = object;
     os->nobject++;
     return FcTrue;
 }

 void
 FcObjectSetDestroy (FcObjectSet *os)
 {
     if (os->objects)
     {
 	FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *));
 	free ((void *) os->objects);
     }
     FcMemFree (FC_MEM_OBJECTSET, sizeof (FcObjectSet));
     free (os);
 }

 FcObjectSet *
 FcObjectSetVaBuild (const char *first, va_list va)
 {
     FcObjectSet    *ret;

     FcObjectSetVapBuild (ret, first, va);
     return ret;
 }

 FcObjectSet *
 FcObjectSetBuild (const char *first, ...)
 {
     va_list	    va;
     FcObjectSet    *os;

     va_start (va, first);
     FcObjectSetVapBuild (os, first, va);
     va_end (va);
     return os;
 }

 static FcBool
 FcListValueListMatchAny (FcValueList *v1orig,
 			 FcValueList *v2orig)
 {
     FcValueList	    *v1, *v2;

     for (v1 = v1orig; v1; v1 = v1->next)
 	for (v2 = v2orig; v2; v2 = v2->next)
 	    if (FcConfigCompareValue (v1->value, FcOpContains, v2->value))
 		return FcTrue;
     return FcFalse;
 }

 static FcBool
 FcListValueListEqual (FcValueList   *v1orig,
 		      FcValueList   *v2orig)
 {
     FcValueList	    *v1, *v2;

     for (v1 = v1orig; v1; v1 = v1->next)
     {
 	for (v2 = v2orig; v2; v2 = v2->next)
 	    if (FcValueEqual (v1->value, v2->value))
 		break;
 	if (!v2)
 	    return FcFalse;
     }
     for (v2 = v2orig; v2; v2 = v2->next)
     {
 	for (v1 = v1orig; v1; v1 = v1->next)
 	    if (FcValueEqual (v1->value, v2->value))
 		break;
 	if (!v1)
 	    return FcFalse;
     }
     return FcTrue;
 }

 static FcBool
 FcListPatternEqual (FcPattern	*p1,
 		    FcPattern	*p2,
 		    FcObjectSet	*os)
 {
     int		    i;
     FcPatternElt    *e1, *e2;

     for (i = 0; i < os->nobject; i++)
     {
 	e1 = FcPatternFindElt (p1, os->objects[i]);
 	e2 = FcPatternFindElt (p2, os->objects[i]);
 	if (!e1 && !e2)
 	    continue;
 	if (!e1 || !e2)
 	    return FcFalse;
 	if (!FcListValueListEqual (e1->values, e2->values))
 	    return FcFalse;
     }
     return FcTrue;
 }

 /*
  * FcTrue iff all objects in "p" match "font"
  */

 static FcBool
 FcListPatternMatchAny (FcPattern *p,
 		       FcPattern *font)
 {
     int		    i;
     FcPatternElt   *e;

     for (i = 0; i < p->num; i++)
     {
 	e = FcPatternFindElt (font, p->elts[i].object);
 	if (!e)
 	    return FcFalse;
 	if (!FcListValueListMatchAny (p->elts[i].values, e->values))
 	    return FcFalse;
     }
     return FcTrue;
 }

 static FcChar32
 FcListStringHash (const FcChar8	*s)
 {
     FcChar32	h = 0;
     FcChar8	c;

     while ((c = *s++))
     {
 	c = FcToLower (c);
 	h = ((h << 3) ^ (h >> 3)) ^ c;
     }
     return h;
 }

 static FcChar32
 FcListMatrixHash (const FcMatrix *m)
 {
     int	    xx = (int) (m->xx * 100),
 	    xy = (int) (m->xy * 100),
 	    yx = (int) (m->yx * 100),
 	    yy = (int) (m->yy * 100);

     return ((FcChar32) xx) ^ ((FcChar32) xy) ^ ((FcChar32) yx) ^ ((FcChar32) yy);
 }

 static FcChar32
 FcListValueHash (FcValue    v)
 {
     switch (v.type) {
     case FcTypeVoid:
 	return 0;
     case FcTypeInteger:
 	return (FcChar32) v.u.i;
     case FcTypeDouble:
 	return (FcChar32) (int) v.u.d;
     case FcTypeString:
 	return FcListStringHash (v.u.s);
     case FcTypeBool:
 	return (FcChar32) v.u.b;
     case FcTypeMatrix:
 	return FcListMatrixHash (v.u.m);
     case FcTypeCharSet:
 	return FcCharSetCount (v.u.c);
     case FcTypeFTFace:
 	return (long) v.u.f;
     case FcTypeLangSet:
 	return FcLangSetHash (v.u.l);
     }
     return 0;
 }

 static FcChar32
 FcListValueListHash (FcValueList    *list)
 {
     FcChar32	h = 0;

     while (list)
     {
 	h = h ^ FcListValueHash (list->value);
 	list = list->next;
     }
     return h;
 }

 static FcChar32
 FcListPatternHash (FcPattern	*font,
 		   FcObjectSet	*os)
 {
     int		    n;
     FcPatternElt    *e;
     FcChar32	    h = 0;

     for (n = 0; n < os->nobject; n++)
     {
 	e = FcPatternFindElt (font, os->objects[n]);
 	if (e)
 	    h = h ^ FcListValueListHash (e->values);
     }
     return h;
 }

 typedef struct _FcListBucket {
     struct _FcListBucket    *next;
     FcChar32		    hash;
     FcPattern		    *pattern;
 } FcListBucket;

 #define FC_LIST_HASH_SIZE   4099

 typedef struct _FcListHashTable {
     int		    entries;
     FcListBucket    *buckets[FC_LIST_HASH_SIZE];
 } FcListHashTable;

 static void
 FcListHashTableInit (FcListHashTable *table)
 {
     table->entries = 0;
     memset (table->buckets, '\0', sizeof (table->buckets));
 }

 static void
 FcListHashTableCleanup (FcListHashTable *table)
 {
     int	i;
     FcListBucket    *bucket, *next;

     for (i = 0; i < FC_LIST_HASH_SIZE; i++)
     {
 	for (bucket = table->buckets[i]; bucket; bucket = next)
 	{
 	    next = bucket->next;
 	    FcPatternDestroy (bucket->pattern);
 	    FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
 	    free (bucket);
 	}
 	table->buckets[i] = 0;
     }
     table->entries = 0;
 }

 static FcBool
 FcListAppend (FcListHashTable	*table,
 	      FcPattern		*font,
 	      FcObjectSet	*os)
 {
     int		    o;
     FcPatternElt    *e;
     FcValueList	    *v;
     FcChar32	    hash;
     FcListBucket    **prev, *bucket;

     hash = FcListPatternHash (font, os);
     for (prev = &table->buckets[hash % FC_LIST_HASH_SIZE];
 	 (bucket = *prev); prev = &(bucket->next))
     {
 	if (bucket->hash == hash &&
 	    FcListPatternEqual (bucket->pattern, font, os))
 	    return FcTrue;
     }
     bucket = (FcListBucket *) malloc (sizeof (FcListBucket));
     if (!bucket)
 	goto bail0;
     FcMemAlloc (FC_MEM_LISTBUCK, sizeof (FcListBucket));
     bucket->next = 0;
     bucket->hash = hash;
     bucket->pattern = FcPatternCreate ();
     if (!bucket->pattern)
 	goto bail1;

     for (o = 0; o < os->nobject; o++)
     {
 	e = FcPatternFindElt (font, os->objects[o]);
 	if (e)
 	{
 	    for (v = e->values; v; v = v->next)
 	    {
 		if (!FcPatternAdd (bucket->pattern,
 				   os->objects[o],
 				   v->value, FcTrue))
 		    goto bail2;
 	    }
 	}
     }
     *prev = bucket;
     ++table->entries;

     return FcTrue;

 bail2:
     FcPatternDestroy (bucket->pattern);
 bail1:
     FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
     free (bucket);
 bail0:
     return FcFalse;
 }

 FcFontSet *
 FcFontSetList (FcConfig	    *config,
 	       FcFontSet    **sets,
 	       int	    nsets,
 	       FcPattern    *p,
 	       FcObjectSet  *os)
 {
     FcFontSet	    *ret;
     FcFontSet	    *s;
     int		    f;
     int		    set;
     FcListHashTable table;
     int		    i;
     FcListBucket    *bucket;

     if (!config)
     {
 	if (!FcInitBringUptoDate ())
 	    goto bail0;

 	config = FcConfigGetCurrent ();
 	if (!config)
 	    goto bail0;
     }
     FcListHashTableInit (&table);
     /*
      * Walk all available fonts adding those that
      * match to the hash table
      */
     for (set = 0; set < nsets; set++)
     {
 	s = sets[set];
 	if (!s)
 	    continue;
 	for (f = 0; f < s->nfont; f++)
 	    if (FcListPatternMatchAny (p, s->fonts[f]))
 		if (!FcListAppend (&table, s->fonts[f], os))
 		    goto bail1;
     }
 #if 0
     {
 	int	max = 0;
 	int	full = 0;
 	int	ents = 0;
 	int	len;
 	for (i = 0; i < FC_LIST_HASH_SIZE; i++)
 	{
 	    if ((bucket = table.buckets[i]))
 	    {
 		len = 0;
 		for (; bucket; bucket = bucket->next)
 		{
 		    ents++;
 		    len++;
 		}
 		if (len > max)
 		    max = len;
 		full++;
 	    }
 	}
 	printf ("used: %d max: %d avg: %g\n", full, max,
 		(double) ents / FC_LIST_HASH_SIZE);
     }
 #endif
     /*
      * Walk the hash table and build
      * a font set
      */
     ret = FcFontSetCreate ();
     if (!ret)
 	goto bail0;
     for (i = 0; i < FC_LIST_HASH_SIZE; i++)
 	while ((bucket = table.buckets[i]))
 	{
 	    if (!FcFontSetAdd (ret, bucket->pattern))
 		goto bail2;
 	    table.buckets[i] = bucket->next;
 	    FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
 	    free (bucket);
 	}

     return ret;

 bail2:
     FcFontSetDestroy (ret);
 bail1:
     FcListHashTableCleanup (&table);
 bail0:
     return 0;
 }

 FcFontSet *
 FcFontList (FcConfig	*config,
 	    FcPattern	*p,
 	    FcObjectSet *os)
 {
     FcFontSet	*sets[2];
     int		nsets;

     if (!config)
     {
 	config = FcConfigGetCurrent ();
 	if (!config)
 	    return 0;
     }
     nsets = 0;
     if (config->fonts[FcSetSystem])
 	sets[nsets++] = config->fonts[FcSetSystem];
     if (config->fonts[FcSetApplication])
 	sets[nsets++] = config->fonts[FcSetApplication];
     return FcFontSetList (config, sets, nsets, p, os);
 }
	/*
	* $RCSId: xc/lib/fontconfig/src/fclist.c,v 1.11tsi Exp $
	*
	* Copyright © 2000 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
	* 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 <stdlib.h>
	#include "fcint.h"

	FcObjectSet *
	FcObjectSetCreate (void)
	{
	FcObjectSet *os;

	os = (FcObjectSet *) malloc (sizeof (FcObjectSet));
	if (!os)
	return 0;
	FcMemAlloc (FC_MEM_OBJECTSET, sizeof (FcObjectSet));
	os->nobject = 0;
	os->sobject = 0;
	os->objects = 0;
	return os;
	}

	FcBool
	FcObjectSetAdd (FcObjectSet os, const char object)
	{
	int s;
	const char **objects;
	int high, low, mid, c;

	if (os->nobject == os->sobject)
	{
	s = os->sobject + 4;
	if (os->objects)
	objects = (const char *) realloc ((void ) os->objects,
	s * sizeof (const char *));
	else
	objects = (const char *) malloc (s sizeof (const char *));
	if (!objects)
	return FcFalse;
	if (os->sobject)
	FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *));
	FcMemAlloc (FC_MEM_OBJECTPTR, s * sizeof (const char *));
	os->objects = objects;
	os->sobject = s;
	}
	high = os->nobject - 1;
	low = 0;
	mid = 0;
	c = 1;
	while (low <= high)
	{
	mid = (low + high) >> 1;
	c = strcmp (os->objects[mid], object);
	if (c == 0)
	return FcTrue;
	if (c < 0)
	low = mid + 1;
	else
	high = mid - 1;
	}
	if (c < 0)
	mid++;
	memmove (os->objects + mid + 1, os->objects + mid,
	(os->nobject - mid) * sizeof (const char *));
	os->objects[mid] = object;
	os->nobject++;
	return FcTrue;
	}

	void
	FcObjectSetDestroy (FcObjectSet *os)
	{
	if (os->objects)
	{
	FcMemFree (FC_MEM_OBJECTPTR, os->sobject * sizeof (const char *));
	free ((void *) os->objects);
	}
	FcMemFree (FC_MEM_OBJECTSET, sizeof (FcObjectSet));
	free (os);
	}

	FcObjectSet *
	FcObjectSetVaBuild (const char *first, va_list va)
	{
	FcObjectSet *ret;

	FcObjectSetVapBuild (ret, first, va);
	return ret;
	}

	FcObjectSet *
	FcObjectSetBuild (const char *first, ...)
	{
	va_list va;
	FcObjectSet *os;

	va_start (va, first);
	FcObjectSetVapBuild (os, first, va);
	va_end (va);
	return os;
	}

	static FcBool
	FcListValueListMatchAny (FcValueList *v1orig,
	FcValueList *v2orig)
	{
	FcValueList v1, v2;

	for (v1 = v1orig; v1; v1 = v1->next)
	for (v2 = v2orig; v2; v2 = v2->next)
	if (FcConfigCompareValue (v1->value, FcOpContains, v2->value))
	return FcTrue;
	return FcFalse;
	}

	static FcBool
	FcListValueListEqual (FcValueList *v1orig,
	FcValueList *v2orig)
	{
	FcValueList v1, v2;

	for (v1 = v1orig; v1; v1 = v1->next)
	{
	for (v2 = v2orig; v2; v2 = v2->next)
	if (FcValueEqual (v1->value, v2->value))
	break;
	if (!v2)
	return FcFalse;
	}
	for (v2 = v2orig; v2; v2 = v2->next)
	{
	for (v1 = v1orig; v1; v1 = v1->next)
	if (FcValueEqual (v1->value, v2->value))
	break;
	if (!v1)
	return FcFalse;
	}
	return FcTrue;
	}

	static FcBool
	FcListPatternEqual (FcPattern *p1,
	FcPattern *p2,
	FcObjectSet *os)
	{
	int i;
	FcPatternElt e1, e2;

	for (i = 0; i < os->nobject; i++)
	{
	e1 = FcPatternFindElt (p1, os->objects[i]);
	e2 = FcPatternFindElt (p2, os->objects[i]);
	if (!e1 && !e2)
	continue;
	if (!e1 \|\| !e2)
	return FcFalse;
	if (!FcListValueListEqual (e1->values, e2->values))
	return FcFalse;
	}
	return FcTrue;
	}

	/*
	* FcTrue iff all objects in "p" match "font"
	*/

	static FcBool
	FcListPatternMatchAny (FcPattern *p,
	FcPattern *font)
	{
	int i;
	FcPatternElt *e;

	for (i = 0; i < p->num; i++)
	{
	e = FcPatternFindElt (font, p->elts[i].object);
	if (!e)
	return FcFalse;
	if (!FcListValueListMatchAny (p->elts[i].values, e->values))
	return FcFalse;
	}
	return FcTrue;
	}

	static FcChar32
	FcListStringHash (const FcChar8 *s)
	{
	FcChar32 h = 0;
	FcChar8 c;

	while ((c = *s++))
	{
	c = FcToLower (c);
	h = ((h << 3) ^ (h >> 3)) ^ c;
	}
	return h;
	}

	static FcChar32
	FcListMatrixHash (const FcMatrix *m)
	{
	int xx = (int) (m->xx * 100),
	xy = (int) (m->xy * 100),
	yx = (int) (m->yx * 100),
	yy = (int) (m->yy * 100);

	return ((FcChar32) xx) ^ ((FcChar32) xy) ^ ((FcChar32) yx) ^ ((FcChar32) yy);
	}

	static FcChar32
	FcListValueHash (FcValue v)
	{
	switch (v.type) {
	case FcTypeVoid:
	return 0;
	case FcTypeInteger:
	return (FcChar32) v.u.i;
	case FcTypeDouble:
	return (FcChar32) (int) v.u.d;
	case FcTypeString:
	return FcListStringHash (v.u.s);
	case FcTypeBool:
	return (FcChar32) v.u.b;
	case FcTypeMatrix:
	return FcListMatrixHash (v.u.m);
	case FcTypeCharSet:
	return FcCharSetCount (v.u.c);
	case FcTypeFTFace:
	return (long) v.u.f;
	case FcTypeLangSet:
	return FcLangSetHash (v.u.l);
	}
	return 0;
	}

	static FcChar32
	FcListValueListHash (FcValueList *list)
	{
	FcChar32 h = 0;

	while (list)
	{
	h = h ^ FcListValueHash (list->value);
	list = list->next;
	}
	return h;
	}

	static FcChar32
	FcListPatternHash (FcPattern *font,
	FcObjectSet *os)
	{
	int n;
	FcPatternElt *e;
	FcChar32 h = 0;

	for (n = 0; n < os->nobject; n++)
	{
	e = FcPatternFindElt (font, os->objects[n]);
	if (e)
	h = h ^ FcListValueListHash (e->values);
	}
	return h;
	}

	typedef struct _FcListBucket {
	struct _FcListBucket *next;
	FcChar32 hash;
	FcPattern *pattern;
	} FcListBucket;

	#define FC_LIST_HASH_SIZE 4099

	typedef struct _FcListHashTable {
	int entries;
	FcListBucket *buckets[FC_LIST_HASH_SIZE];
	} FcListHashTable;

	static void
	FcListHashTableInit (FcListHashTable *table)
	{
	table->entries = 0;
	memset (table->buckets, '\0', sizeof (table->buckets));
	}

	static void
	FcListHashTableCleanup (FcListHashTable *table)
	{
	int i;
	FcListBucket bucket, next;

	for (i = 0; i < FC_LIST_HASH_SIZE; i++)
	{
	for (bucket = table->buckets[i]; bucket; bucket = next)
	{
	next = bucket->next;
	FcPatternDestroy (bucket->pattern);
	FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
	free (bucket);
	}
	table->buckets[i] = 0;
	}
	table->entries = 0;
	}

	static FcBool
	FcListAppend (FcListHashTable *table,
	FcPattern *font,
	FcObjectSet *os)
	{
	int o;
	FcPatternElt *e;
	FcValueList *v;
	FcChar32 hash;
	FcListBucket *prev, bucket;

	hash = FcListPatternHash (font, os);
	for (prev = &table->buckets[hash % FC_LIST_HASH_SIZE];
	(bucket = *prev); prev = &(bucket->next))
	{
	if (bucket->hash == hash &&
	FcListPatternEqual (bucket->pattern, font, os))
	return FcTrue;
	}
	bucket = (FcListBucket *) malloc (sizeof (FcListBucket));
	if (!bucket)
	goto bail0;
	FcMemAlloc (FC_MEM_LISTBUCK, sizeof (FcListBucket));
	bucket->next = 0;
	bucket->hash = hash;
	bucket->pattern = FcPatternCreate ();
	if (!bucket->pattern)
	goto bail1;

	for (o = 0; o < os->nobject; o++)
	{
	e = FcPatternFindElt (font, os->objects[o]);
	if (e)
	{
	for (v = e->values; v; v = v->next)
	{
	if (!FcPatternAdd (bucket->pattern,
	os->objects[o],
	v->value, FcTrue))
	goto bail2;
	}
	}
	}
	*prev = bucket;
	++table->entries;

	return FcTrue;

	bail2:
	FcPatternDestroy (bucket->pattern);
	bail1:
	FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
	free (bucket);
	bail0:
	return FcFalse;
	}

	FcFontSet *
	FcFontSetList (FcConfig *config,
	FcFontSet **sets,
	int nsets,
	FcPattern *p,
	FcObjectSet *os)
	{
	FcFontSet *ret;
	FcFontSet *s;
	int f;
	int set;
	FcListHashTable table;
	int i;
	FcListBucket *bucket;

	if (!config)
	{
	if (!FcInitBringUptoDate ())
	goto bail0;

	config = FcConfigGetCurrent ();
	if (!config)
	goto bail0;
	}
	FcListHashTableInit (&table);
	/*
	* Walk all available fonts adding those that
	* match to the hash table
	*/
	for (set = 0; set < nsets; set++)
	{
	s = sets[set];
	if (!s)
	continue;
	for (f = 0; f < s->nfont; f++)
	if (FcListPatternMatchAny (p, s->fonts[f]))
	if (!FcListAppend (&table, s->fonts[f], os))
	goto bail1;
	}
	#if 0
	{
	int max = 0;
	int full = 0;
	int ents = 0;
	int len;
	for (i = 0; i < FC_LIST_HASH_SIZE; i++)
	{
	if ((bucket = table.buckets[i]))
	{
	len = 0;
	for (; bucket; bucket = bucket->next)
	{
	ents++;
	len++;
	}
	if (len > max)
	max = len;
	full++;
	}
	}
	printf ("used: %d max: %d avg: %g\n", full, max,
	(double) ents / FC_LIST_HASH_SIZE);
	}
	#endif
	/*
	* Walk the hash table and build
	* a font set
	*/
	ret = FcFontSetCreate ();
	if (!ret)
	goto bail0;
	for (i = 0; i < FC_LIST_HASH_SIZE; i++)
	while ((bucket = table.buckets[i]))
	{
	if (!FcFontSetAdd (ret, bucket->pattern))
	goto bail2;
	table.buckets[i] = bucket->next;
	FcMemFree (FC_MEM_LISTBUCK, sizeof (FcListBucket));
	free (bucket);
	}

	return ret;

	bail2:
	FcFontSetDestroy (ret);
	bail1:
	FcListHashTableCleanup (&table);
	bail0:
	return 0;
	}

	FcFontSet *
	FcFontList (FcConfig *config,
	FcPattern *p,
	FcObjectSet *os)
	{
	FcFontSet *sets[2];
	int nsets;

	if (!config)
	{
	config = FcConfigGetCurrent ();
	if (!config)
	return 0;
	}
	nsets = 0;
	if (config->fonts[FcSetSystem])
	sets[nsets++] = config->fonts[FcSetSystem];
	if (config->fonts[FcSetApplication])
	sets[nsets++] = config->fonts[FcSetApplication];
	return FcFontSetList (config, sets, nsets, p, os);
	}