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Fix bug when clients use FcNameRegisterObjectTypes; fontconfig was 

returning bogus (i.e. duplicate) FcObjectPtr values. Now use negative
    values for dynamic object strings and positive values for built-in and
    FcNameRegisterObjectType strings. Thanks to Matthias Clasen for
    pinpointing this bus!
This commit is contained in:
Patrick Lam 2005-09-22 20:49:24 +00:00
parent 9fe2bd7ab0
commit 141432505a
1 changed files with 28 additions and 9 deletions
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33
src/fcname.c
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@ -30,6 +30,7 @@
/* Please do not revoke any of these bindings. */ /* Please do not revoke any of these bindings. */
static const FcObjectType _FcBaseObjectTypes[] = { static const FcObjectType _FcBaseObjectTypes[] = {
{ "__DUMMY__", FcTypeVoid, },
{ FC_FAMILY, FcTypeString, }, { FC_FAMILY, FcTypeString, },
{ FC_FAMILYLANG, FcTypeString, }, { FC_FAMILYLANG, FcTypeString, },
{ FC_STYLE, FcTypeString, }, { FC_STYLE, FcTypeString, },
@ -77,6 +78,7 @@ static const FcObjectType _FcBaseObjectTypes[] = {
static FcObjectType * _FcUserObjectNames = 0; static FcObjectType * _FcUserObjectNames = 0;
static int user_obj_alloc = 0; static int user_obj_alloc = 0;
static int next_basic_offset = NUM_OBJECT_TYPES;
typedef struct _FcObjectTypeList FcObjectTypeList; typedef struct _FcObjectTypeList FcObjectTypeList;
@ -84,6 +86,7 @@ struct _FcObjectTypeList {
const FcObjectTypeList *next; const FcObjectTypeList *next;
const FcObjectType *types; const FcObjectType *types;
int ntypes; int ntypes;
int basic_offset;
}; };
static const FcObjectTypeList _FcBaseObjectTypesList = { static const FcObjectTypeList _FcBaseObjectTypesList = {
@ -106,6 +109,8 @@ FcNameRegisterObjectTypes (const FcObjectType *types, int ntypes)
l->types = types; l->types = types;
l->ntypes = ntypes; l->ntypes = ntypes;
l->next = _FcObjectTypes; l->next = _FcObjectTypes;
l->basic_offset = next_basic_offset;
next_basic_offset += ntypes;
_FcObjectTypes = l; _FcObjectTypes = l;
return FcTrue; return FcTrue;
} }
@ -166,6 +171,8 @@ struct objectBucket {
}; };
static struct objectBucket *FcObjectBuckets[OBJECT_HASH_SIZE]; static struct objectBucket *FcObjectBuckets[OBJECT_HASH_SIZE];
/* Design constraint: biggest_known_ntypes must never change
* after any call to FcNameRegisterObjectTypes. */
static const FcObjectType *biggest_known_types = _FcBaseObjectTypes; static const FcObjectType *biggest_known_types = _FcBaseObjectTypes;
static FcBool allocated_biggest_known_types; static FcBool allocated_biggest_known_types;
static int biggest_known_ntypes = NUM_OBJECT_TYPES; static int biggest_known_ntypes = NUM_OBJECT_TYPES;
@ -188,9 +195,9 @@ FcObjectToPtrLookup (const char * object)
if (!strcmp (object, t->object)) if (!strcmp (object, t->object))
{ {
if (l == (FcObjectTypeList*)_FcUserObjectNames) if (l == (FcObjectTypeList*)_FcUserObjectNames)
return i + biggest_known_ntypes; return -i;
else else
return i; return l->basic_offset + i;
} }
} }
} }
@ -210,7 +217,7 @@ FcObjectToPtrLookup (const char * object)
FcObjectType * t = realloc (_FcUserObjectNames, FcObjectType * t = realloc (_FcUserObjectNames,
nt * sizeof (FcObjectType)); nt * sizeof (FcObjectType));
if (!t) if (!t)
return -1; return 0;
_FcUserObjectNames = t; _FcUserObjectNames = t;
user_obj_alloc = nt; user_obj_alloc = nt;
} }
@ -240,7 +247,7 @@ FcObjectToPtrLookup (const char * object)
t[n].object = object; t[n].object = object;
t[n].type = FcTypeVoid; t[n].type = FcTypeVoid;
return n+biggest_known_ntypes; return -n;
} }
FcObjectPtr FcObjectPtr
@ -259,7 +266,7 @@ FcObjectToPtr (const char * name)
b = malloc (size); b = malloc (size);
FcMemAlloc (FC_MEM_STATICSTR, size); FcMemAlloc (FC_MEM_STATICSTR, size);
if (!b) if (!b)
return -1; return 0;
b->next = 0; b->next = 0;
b->hash = hash; b->hash = hash;
b->id = FcObjectToPtrLookup (name); b->id = FcObjectToPtrLookup (name);
@ -291,11 +298,23 @@ FcObjectStaticNameFini (void)
const char * const char *
FcObjectPtrU (FcObjectPtr si) FcObjectPtrU (FcObjectPtr si)
{
const FcObjectTypeList *l;
int i, j;
if (si > 0)
{ {
if (si < biggest_known_ntypes) if (si < biggest_known_ntypes)
return biggest_known_types[si].object; return biggest_known_types[si].object;
else
return _FcUserObjectNames[si-biggest_known_ntypes].object; j = 0;
for (l = _FcObjectTypes; l; l = l->next)
for (i = 0; i < l->ntypes; i++, j++)
if (j == si)
return l->types[i].object;
}
return _FcUserObjectNames[-si].object;
} }
int int