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path: root/fontconfig/src/fccharset.c
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Diffstat (limited to 'fontconfig/src/fccharset.c')
-rw-r--r--fontconfig/src/fccharset.c175
1 files changed, 103 insertions, 72 deletions
diff --git a/fontconfig/src/fccharset.c b/fontconfig/src/fccharset.c
index df1d2b538..8c1d85819 100644
--- a/fontconfig/src/fccharset.c
+++ b/fontconfig/src/fccharset.c
@@ -54,28 +54,31 @@ FcCharSetDestroy (FcCharSet *fcs)
{
int i;
- if (fcs->ref == FC_REF_CONSTANT)
+ if (fcs)
{
- FcCacheObjectDereference (fcs);
- return;
- }
- if (--fcs->ref > 0)
- return;
- for (i = 0; i < fcs->num; i++)
- {
- FcMemFree (FC_MEM_CHARLEAF, sizeof (FcCharLeaf));
- free (FcCharSetLeaf (fcs, i));
- }
- if (fcs->num)
- {
- /* the numbers here are estimates */
- FcMemFree (FC_MEM_CHARSET, fcs->num * sizeof (intptr_t));
- free (FcCharSetLeaves (fcs));
- FcMemFree (FC_MEM_CHARSET, fcs->num * sizeof (FcChar16));
- free (FcCharSetNumbers (fcs));
+ if (fcs->ref == FC_REF_CONSTANT)
+ {
+ FcCacheObjectDereference (fcs);
+ return;
+ }
+ if (--fcs->ref > 0)
+ return;
+ for (i = 0; i < fcs->num; i++)
+ {
+ FcMemFree (FC_MEM_CHARLEAF, sizeof (FcCharLeaf));
+ free (FcCharSetLeaf (fcs, i));
+ }
+ if (fcs->num)
+ {
+ /* the numbers here are estimates */
+ FcMemFree (FC_MEM_CHARSET, fcs->num * sizeof (intptr_t));
+ free (FcCharSetLeaves (fcs));
+ FcMemFree (FC_MEM_CHARSET, fcs->num * sizeof (FcChar16));
+ free (FcCharSetNumbers (fcs));
+ }
+ FcMemFree (FC_MEM_CHARSET, sizeof (FcCharSet));
+ free (fcs);
}
- FcMemFree (FC_MEM_CHARSET, sizeof (FcCharSet));
- free (fcs);
}
/*
@@ -252,7 +255,7 @@ FcCharSetAddChar (FcCharSet *fcs, FcChar32 ucs4)
FcCharLeaf *leaf;
FcChar32 *b;
- if (fcs->ref == FC_REF_CONSTANT)
+ if (fcs == NULL || fcs->ref == FC_REF_CONSTANT)
return FcFalse;
leaf = FcCharSetFindLeafCreate (fcs, ucs4);
if (!leaf)
@@ -268,7 +271,7 @@ FcCharSetDelChar (FcCharSet *fcs, FcChar32 ucs4)
FcCharLeaf *leaf;
FcChar32 *b;
- if (fcs->ref == FC_REF_CONSTANT)
+ if (fcs == NULL || fcs->ref == FC_REF_CONSTANT)
return FcFalse;
leaf = FcCharSetFindLeaf (fcs, ucs4);
if (!leaf)
@@ -342,10 +345,13 @@ FcCharSetIterStart (const FcCharSet *fcs, FcCharSetIter *iter)
FcCharSet *
FcCharSetCopy (FcCharSet *src)
{
- if (src->ref != FC_REF_CONSTANT)
- src->ref++;
- else
- FcCacheObjectReference (src);
+ if (src)
+ {
+ if (src->ref != FC_REF_CONSTANT)
+ src->ref++;
+ else
+ FcCacheObjectReference (src);
+ }
return src;
}
@@ -357,6 +363,8 @@ FcCharSetEqual (const FcCharSet *a, const FcCharSet *b)
if (a == b)
return FcTrue;
+ if (!a || !b)
+ return FcFalse;
for (FcCharSetIterStart (a, &ai), FcCharSetIterStart (b, &bi);
ai.leaf && bi.leaf;
FcCharSetIterNext (a, &ai), FcCharSetIterNext (b, &bi))
@@ -394,6 +402,8 @@ FcCharSetOperate (const FcCharSet *a,
FcCharSet *fcs;
FcCharSetIter ai, bi;
+ if (!a || !b)
+ goto bail0;
fcs = FcCharSetCreate ();
if (!fcs)
goto bail0;
@@ -493,6 +503,9 @@ FcCharSetMerge (FcCharSet *a, const FcCharSet *b, FcBool *changed)
int ai = 0, bi = 0;
FcChar16 an, bn;
+ if (!a || !b)
+ return FcFalse;
+
if (a->ref == FC_REF_CONSTANT) {
if (changed)
*changed = FcFalse;
@@ -561,7 +574,11 @@ FcCharSetSubtract (const FcCharSet *a, const FcCharSet *b)
FcBool
FcCharSetHasChar (const FcCharSet *fcs, FcChar32 ucs4)
{
- FcCharLeaf *leaf = FcCharSetFindLeaf (fcs, ucs4);
+ FcCharLeaf *leaf;
+
+ if (!fcs)
+ return FcFalse;
+ leaf = FcCharSetFindLeaf (fcs, ucs4);
if (!leaf)
return FcFalse;
return (leaf->map[(ucs4 & 0xff) >> 5] & (1 << (ucs4 & 0x1f))) != 0;
@@ -586,28 +603,31 @@ FcCharSetIntersectCount (const FcCharSet *a, const FcCharSet *b)
FcCharSetIter ai, bi;
FcChar32 count = 0;
- FcCharSetIterStart (a, &ai);
- FcCharSetIterStart (b, &bi);
- while (ai.leaf && bi.leaf)
+ if (a && b)
{
- if (ai.ucs4 == bi.ucs4)
- {
- FcChar32 *am = ai.leaf->map;
- FcChar32 *bm = bi.leaf->map;
- int i = 256/32;
- while (i--)
- count += FcCharSetPopCount (*am++ & *bm++);
- FcCharSetIterNext (a, &ai);
- }
- else if (ai.ucs4 < bi.ucs4)
- {
- ai.ucs4 = bi.ucs4;
- FcCharSetIterSet (a, &ai);
- }
- if (bi.ucs4 < ai.ucs4)
+ FcCharSetIterStart (a, &ai);
+ FcCharSetIterStart (b, &bi);
+ while (ai.leaf && bi.leaf)
{
- bi.ucs4 = ai.ucs4;
- FcCharSetIterSet (b, &bi);
+ if (ai.ucs4 == bi.ucs4)
+ {
+ FcChar32 *am = ai.leaf->map;
+ FcChar32 *bm = bi.leaf->map;
+ int i = 256/32;
+ while (i--)
+ count += FcCharSetPopCount (*am++ & *bm++);
+ FcCharSetIterNext (a, &ai);
+ }
+ else if (ai.ucs4 < bi.ucs4)
+ {
+ ai.ucs4 = bi.ucs4;
+ FcCharSetIterSet (a, &ai);
+ }
+ if (bi.ucs4 < ai.ucs4)
+ {
+ bi.ucs4 = ai.ucs4;
+ FcCharSetIterSet (b, &bi);
+ }
}
}
return count;
@@ -619,13 +639,16 @@ FcCharSetCount (const FcCharSet *a)
FcCharSetIter ai;
FcChar32 count = 0;
- for (FcCharSetIterStart (a, &ai); ai.leaf; FcCharSetIterNext (a, &ai))
+ if (a)
{
- int i = 256/32;
- FcChar32 *am = ai.leaf->map;
+ for (FcCharSetIterStart (a, &ai); ai.leaf; FcCharSetIterNext (a, &ai))
+ {
+ int i = 256/32;
+ FcChar32 *am = ai.leaf->map;
- while (i--)
- count += FcCharSetPopCount (*am++);
+ while (i--)
+ count += FcCharSetPopCount (*am++);
+ }
}
return count;
}
@@ -636,31 +659,34 @@ FcCharSetSubtractCount (const FcCharSet *a, const FcCharSet *b)
FcCharSetIter ai, bi;
FcChar32 count = 0;
- FcCharSetIterStart (a, &ai);
- FcCharSetIterStart (b, &bi);
- while (ai.leaf)
+ if (a && b)
{
- if (ai.ucs4 <= bi.ucs4)
+ FcCharSetIterStart (a, &ai);
+ FcCharSetIterStart (b, &bi);
+ while (ai.leaf)
{
- FcChar32 *am = ai.leaf->map;
- int i = 256/32;
- if (ai.ucs4 == bi.ucs4)
+ if (ai.ucs4 <= bi.ucs4)
{
- FcChar32 *bm = bi.leaf->map;
- while (i--)
- count += FcCharSetPopCount (*am++ & ~*bm++);
+ FcChar32 *am = ai.leaf->map;
+ int i = 256/32;
+ if (ai.ucs4 == bi.ucs4)
+ {
+ FcChar32 *bm = bi.leaf->map;
+ while (i--)
+ count += FcCharSetPopCount (*am++ & ~*bm++);
+ }
+ else
+ {
+ while (i--)
+ count += FcCharSetPopCount (*am++);
+ }
+ FcCharSetIterNext (a, &ai);
}
- else
+ else if (bi.leaf)
{
- while (i--)
- count += FcCharSetPopCount (*am++);
+ bi.ucs4 = ai.ucs4;
+ FcCharSetIterSet (b, &bi);
}
- FcCharSetIterNext (a, &ai);
- }
- else if (bi.leaf)
- {
- bi.ucs4 = ai.ucs4;
- FcCharSetIterSet (b, &bi);
}
}
return count;
@@ -675,7 +701,10 @@ FcCharSetIsSubset (const FcCharSet *a, const FcCharSet *b)
int ai, bi;
FcChar16 an, bn;
- if (a == b) return FcTrue;
+ if (a == b)
+ return FcTrue;
+ if (!a || !b)
+ return FcFalse;
bi = 0;
ai = 0;
while (ai < a->num && bi < b->num)
@@ -734,6 +763,8 @@ FcCharSetNextPage (const FcCharSet *a,
FcCharSetIter ai;
FcChar32 page;
+ if (!a)
+ return FC_CHARSET_DONE;
ai.ucs4 = *next;
FcCharSetIterSet (a, &ai);
if (!ai.leaf)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 03:05:10 +0000