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fontconfig/src/fclist.c

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/*
* fontconfig/src/fclist.c
*
* 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 the author(s) not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. The authors make no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE AUTHOR(S) 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"
#include <stdlib.h>
FcObjectSet *
FcObjectSetCreate (void)
{
FcObjectSet *os;
os = (FcObjectSet *) malloc (sizeof (FcObjectSet));
if (!os)
return 0;
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;
os->objects = objects;
os->sobject = s;
}
high = os->nobject - 1;
low = 0;
mid = 0;
c = 1;
object = strdup (object);
while (low <= high)
{
mid = (low + high) >> 1;
c = os->objects[mid] - object;
if (c == 0)
{
FcFree (object);
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)
{
int i;
if (os->objects)
{
for (i = 0; i < os->nobject; i++)
FcFree (os->objects[i]);
free ((void *) os->objects);
}
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;
}
/*
* Font must have a containing value for every value in the pattern
*/
static FcBool
FcListValueListMatchAny (FcValueListPtr patOrig, /* pattern */
FcValueListPtr fntOrig) /* font */
{
FcValueListPtr pat, fnt;
for (pat = patOrig; pat != NULL; pat = FcValueListNext(pat))
{
for (fnt = fntOrig; fnt != NULL; fnt = FcValueListNext(fnt))
{
/*
* make sure the font 'contains' the pattern.
* (OpListing is OpContains except for strings
* where it requires an exact match)
*/
if (FcConfigCompareValue (&fnt->value,
FC_OP (FcOpListing, FcOpFlagIgnoreBlanks),
&pat->value))
break;
}
if (fnt == NULL)
return FcFalse;
}
return FcTrue;
}
static FcBool
FcListValueListEqual (FcValueListPtr v1orig,
FcValueListPtr v2orig)
{
FcValueListPtr v1, v2;
for (v1 = v1orig; v1 != NULL; v1 = FcValueListNext(v1))
{
for (v2 = v2orig; v2 != NULL; v2 = FcValueListNext(v2))
if (FcValueEqual (FcValueCanonicalize(&(v1)->value),
FcValueCanonicalize(&(v2)->value)))
break;
if (v2 == NULL)
return FcFalse;
}
for (v2 = v2orig; v2 != NULL; v2 = FcValueListNext(v2))
{
for (v1 = v1orig; v1 != NULL; v1 = FcValueListNext(v1))
if (FcValueEqual (FcValueCanonicalize(&v1->value),
FcValueCanonicalize(&v2->value)))
break;
if (v1 == NULL)
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 = FcPatternObjectFindElt (p1, FcObjectFromName (os->objects[i]));
e2 = FcPatternObjectFindElt (p2, FcObjectFromName (os->objects[i]));
if (!e1 && !e2)
continue;
if (!e1 || !e2)
return FcFalse;
if (!FcListValueListEqual (FcPatternEltValues(e1),
FcPatternEltValues(e2)))
return FcFalse;
}
return FcTrue;
}
/*
* FcTrue iff all objects in "p" match "font"
*/
FcBool
FcListPatternMatchAny (const FcPattern *p,
const FcPattern *font)
{
int i;
if (!p)
return FcFalse;
for (i = 0; i < p->num; i++)
{
FcPatternElt *pe = &FcPatternElts(p)[i];
FcPatternElt *fe;
if (pe->object == FC_NAMELANG_OBJECT)
{
/* "namelang" object is the alias object to change "familylang",
* "stylelang" and "fullnamelang" object alltogether. it won't be
* available on the font pattern. so checking its availability
* causes no results. we should ignore it here.
*/
continue;
}
fe = FcPatternObjectFindElt (font, pe->object);
if (!fe)
return FcFalse;
if (!FcListValueListMatchAny (FcPatternEltValues(pe), /* pat elts */
FcPatternEltValues(fe))) /* font elts */
return FcFalse;
}
return FcTrue;
}
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 *value)
{
FcValue v = FcValueCanonicalize(value);
switch (v.type) {
case FcTypeUnknown:
case FcTypeVoid:
return 0;
case FcTypeInteger:
return (FcChar32) v.u.i;
case FcTypeDouble:
return (FcChar32) (int) v.u.d;
case FcTypeString:
return FcStrHashIgnoreCase (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 (FcValueListPtr list)
{
FcChar32 h = 0;
while (list != NULL)
{
h = h ^ FcListValueHash (&list->value);
list = FcValueListNext(list);
}
return h;
}
static FcChar32
FcListPatternHash (FcPattern *font,
FcObjectSet *os)
{
int n;
FcPatternElt *e;
FcChar32 h = 0;
for (n = 0; n < os->nobject; n++)
{
e = FcPatternObjectFindElt (font, FcObjectFromName (os->objects[n]));
if (e)
h = h ^ FcListValueListHash (FcPatternEltValues(e));
}
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);
free (bucket);
}
table->buckets[i] = 0;
}
table->entries = 0;
}
static int
FcGetDefaultObjectLangIndex (FcPattern *font, FcObject object, const FcChar8 *lang)
{
FcPatternElt *e = FcPatternObjectFindElt (font, object);
FcValueListPtr v;
FcValue value;
int idx = -1;
int defidx = -1;
int i;
if (e)
{
for (v = FcPatternEltValues(e), i = 0; v; v = FcValueListNext(v), ++i)
{
value = FcValueCanonicalize (&v->value);
if (value.type == FcTypeString)
{
FcLangResult res = FcLangCompare (value.u.s, lang);
if (res == FcLangEqual)
return i;
if (res == FcLangDifferentCountry && idx < 0)
idx = i;
if (defidx < 0)
{
/* workaround for fonts that has non-English value
* at the head of values.
*/
res = FcLangCompare (value.u.s, (FcChar8 *)"en");
if (res == FcLangEqual)
defidx = i;
}
}
}
}
return (idx > 0) ? idx : (defidx > 0) ? defidx : 0;
}
static FcBool
FcListAppend (FcListHashTable *table,
FcPattern *font,
FcObjectSet *os,
const FcChar8 *lang)
{
int o;
FcPatternElt *e;
FcValueListPtr v;
FcChar32 hash;
FcListBucket **prev, *bucket;
int familyidx = -1;
int fullnameidx = -1;
int styleidx = -1;
int defidx = 0;
int idx;
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;
bucket->next = 0;
bucket->hash = hash;
bucket->pattern = FcPatternCreate ();
if (!bucket->pattern)
goto bail1;
for (o = 0; o < os->nobject; o++)
{
if (!strcmp (os->objects[o], FC_FAMILY) || !strcmp (os->objects[o], FC_FAMILYLANG))
{
if (familyidx < 0)
familyidx = FcGetDefaultObjectLangIndex (font, FC_FAMILYLANG_OBJECT, lang);
defidx = familyidx;
}
else if (!strcmp (os->objects[o], FC_FULLNAME) || !strcmp (os->objects[o], FC_FULLNAMELANG))
{
if (fullnameidx < 0)
fullnameidx = FcGetDefaultObjectLangIndex (font, FC_FULLNAMELANG_OBJECT, lang);
defidx = fullnameidx;
}
else if (!strcmp (os->objects[o], FC_STYLE) || !strcmp (os->objects[o], FC_STYLELANG))
{
if (styleidx < 0)
styleidx = FcGetDefaultObjectLangIndex (font, FC_STYLELANG_OBJECT, lang);
defidx = styleidx;
}
else
defidx = 0;
e = FcPatternObjectFindElt (font, FcObjectFromName (os->objects[o]));
if (e)
{
for (v = FcPatternEltValues(e), idx = 0; v;
v = FcValueListNext(v), ++idx)
{
if (!FcPatternAdd (bucket->pattern,
os->objects[o],
FcValueCanonicalize(&v->value), defidx != idx))
goto bail2;
}
}
}
*prev = bucket;
++table->entries;
return FcTrue;
bail2:
FcPatternDestroy (bucket->pattern);
bail1:
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;
int destroy_os = 0;
if (!config)
{
if (!FcInitBringUptoDate ())
goto bail0;
config = FcConfigGetCurrent ();
if (!config)
goto bail0;
}
FcListHashTableInit (&table);
if (!os)
{
os = FcObjectGetSet ();
destroy_os = 1;
}
/*
* 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, /* pattern */
s->fonts[f])) /* font */
{
FcChar8 *lang;
if (FcPatternObjectGetString (p, FC_NAMELANG_OBJECT, 0, &lang) != FcResultMatch)
{
lang = FcGetDefaultLang ();
}
if (!FcListAppend (&table, s->fonts[f], os, lang))
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;
free (bucket);
}
return ret;
bail2:
FcFontSetDestroy (ret);
bail1:
FcListHashTableCleanup (&table);
bail0:
if (destroy_os)
FcObjectSetDestroy (os);
return 0;
}
FcFontSet *
FcFontList (FcConfig *config,
FcPattern *p,
FcObjectSet *os)
{
FcFontSet *sets[2];
int nsets;
if (!config)
{
if (!FcInitBringUptoDate ())
return 0;
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);
}
#define __fclist__
#include "fcaliastail.h"
#undef __fclist__
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