Bug 57114 - regression on FcFontMatch with namelang

After 7587d1c99d applied, family,
style, and fullname is localized against current locale or lang
if any though, the string in other languages were dropped from
the pattern. this caused unexpected mismatch on the target="font"
rules.

This fix adds other strings at the end of the list.

src/fcint.h

@@ -923,15 +923,37 @@ FcObjectFini (void);
 FcPrivate FcValue
 FcValueCanonicalize (const FcValue *v);
 
+FcPrivate FcValueListPtr
+FcValueListCreate (void);
+
 FcPrivate void
 FcValueListDestroy (FcValueListPtr l);
 
+FcPrivate FcValueListPtr
+FcValueListPrepend (FcValueListPtr vallist,
+		    FcValue        value,
+		    FcValueBinding binding);
+
+FcPrivate FcValueListPtr
+FcValueListAppend (FcValueListPtr vallist,
+		   FcValue        value,
+		   FcValueBinding binding);
+
+FcPrivate FcValueListPtr
+FcValueListDuplicate(FcValueListPtr orig);
+
 FcPrivate FcPatternElt *
 FcPatternObjectFindElt (const FcPattern *p, FcObject object);
 
 FcPrivate FcPatternElt *
 FcPatternObjectInsertElt (FcPattern *p, FcObject object);
 
+FcPrivate FcBool
+FcPatternObjectListAdd (FcPattern	*p,
+			FcObject	object,
+			FcValueListPtr	list,
+			FcBool		append);
+
 FcPrivate FcBool
 FcPatternObjectAddWithBinding  (FcPattern	*p,
 				FcObject	object,

src/fcmatch.c

@@ -432,7 +432,7 @@ FcFontRenderPrepare (FcConfig	    *config,
     FcPattern	    *new;
     int		    i;
     FcPatternElt    *fe, *pe, *fel, *pel;
-    FcValue	    v, vl;
+    FcValue	    v;
     FcResult	    result;
 
     assert (pat != NULL);
@@ -440,7 +440,7 @@ FcFontRenderPrepare (FcConfig	    *config,
 
     new = FcPatternCreate ();
     if (!new)
-	return 0;
+	return NULL;
     for (i = 0; i < font->num; i++)
     {
 	fe = &FcPatternElts(font)[i];
@@ -478,47 +478,74 @@ FcFontRenderPrepare (FcConfig	    *config,
 				     FcPatternEltValues(fe), &v, NULL, NULL, &result))
 	    {
 		FcPatternDestroy (new);
-		return 0;
+		return NULL;
 	    }
 	    if (fel && pel)
 	    {
 		int n = 1, j;
+		FcValueListPtr l1, l2, ln = NULL, ll = NULL;
 
 		match = FcObjectToMatcher (pel->object, FcTrue);
 		if (!FcCompareValueList (pel->object, match,
 					 FcPatternEltValues (pel),
-					 FcPatternEltValues (fel), &vl, NULL, &n, &result))
+					 FcPatternEltValues (fel), NULL, NULL, &n, &result))
 		{
 		    FcPatternDestroy (new);
 		    return NULL;
 		}
-		else
-		{
-		    FcValueListPtr l;
 
-		    for (j = 0, l = FcPatternEltValues (fe);
-			 j < n && l != NULL;
-			 j++, l = FcValueListNext (l));
-		    if (l)
-			v = FcValueCanonicalize (&l->value);
+		for (j = 0, l1 = FcPatternEltValues (fe), l2 = FcPatternEltValues (fel);
+		     l1 != NULL || l2 != NULL;
+		     j++, l1 = l1 ? FcValueListNext (l1) : NULL, l2 = l2 ? FcValueListNext (l2) : NULL)
+		{
+		    if (j == n)
+		    {
+			if (l1)
+			    ln = FcValueListPrepend (ln,
+						     FcValueCanonicalize (&l1->value),
+						     FcValueBindingStrong);
+			if (l2)
+			    ll = FcValueListPrepend (ll,
+						     FcValueCanonicalize (&l2->value),
+						     FcValueBindingStrong);
+		    }
 		    else
-			v = FcValueCanonicalize (&FcPatternEltValues (fe)->value);
+		    {
+			if (l1)
+			    ln = FcValueListAppend (ln,
+						    FcValueCanonicalize (&l1->value),
+						    FcValueBindingStrong);
+			if (l2)
+			    ll = FcValueListAppend (ll,
+						    FcValueCanonicalize (&l2->value),
+						    FcValueBindingStrong);
+		    }
 		}
+		FcPatternObjectListAdd (new, fe->object, ln, FcFalse);
+		FcPatternObjectListAdd (new, fel->object, ll, FcFalse);
+
+		continue;
 	    }
 	    else if (fel)
 	    {
-		vl = FcValueCanonicalize (&FcPatternEltValues (fel)->value);
+		FcValueListPtr l1, l2;
+
+	    copy_lang:
+		l1 = FcValueListDuplicate (FcPatternEltValues (fe));
+		l2 = FcValueListDuplicate (FcPatternEltValues (fel));
+		FcPatternObjectListAdd (new, fe->object, l1, FcFalse);
+		FcPatternObjectListAdd (new, fel->object, l2, FcFalse);
+
+		continue;
 	    }
 	}
 	else
 	{
-	    v = FcValueCanonicalize(&FcPatternEltValues (fe)->value);
 	    if (fel)
-		vl = FcValueCanonicalize (&FcPatternEltValues (fel)->value);
+		goto copy_lang;
+	    v = FcValueCanonicalize(&FcPatternEltValues (fe)->value);
 	}
 	FcPatternObjectAdd (new, fe->object, v, FcFalse);
-	if (fel)
-	    FcPatternObjectAdd (new, fel->object, vl, FcFalse);
     }
     for (i = 0; i < pat->num; i++)
     {

src/fcpat.c

@@ -120,6 +120,20 @@ FcValueSave (FcValue v)
     return v;
 }
 
+FcValueListPtr
+FcValueListCreate (void)
+{
+    FcValueListPtr ret;
+
+    ret = calloc (1, sizeof (FcValueList));
+    if (ret)
+    {
+	FcMemAlloc(FC_MEM_VALLIST, sizeof (FcValueList));
+    }
+
+    return ret;
+}
+
 void
 FcValueListDestroy (FcValueListPtr l)
 {
@@ -151,6 +165,81 @@ FcValueListDestroy (FcValueListPtr l)
     }
 }
 
+FcValueListPtr
+FcValueListPrepend (FcValueListPtr vallist,
+		    FcValue        value,
+		    FcValueBinding binding)
+{
+    FcValueListPtr new;
+
+    if (value.type == FcTypeVoid)
+	return vallist;
+    new = FcValueListCreate ();
+    if (!new)
+	return vallist;
+
+    new->value = FcValueSave (value);
+    new->binding = binding;
+    new->next = vallist;
+
+    return new;
+}
+
+FcValueListPtr
+FcValueListAppend (FcValueListPtr vallist,
+		   FcValue        value,
+		   FcValueBinding binding)
+{
+    FcValueListPtr new, last;
+
+    if (value.type == FcTypeVoid)
+	return vallist;
+    new = FcValueListCreate ();
+    if (!new)
+	return vallist;
+
+    new->value = FcValueSave (value);
+    new->binding = binding;
+    new->next = NULL;
+
+    if (vallist)
+    {
+	for (last = vallist; FcValueListNext (last); last = FcValueListNext (last));
+
+	last->next = new;
+    }
+    else
+	vallist = new;
+
+    return vallist;
+}
+
+FcValueListPtr
+FcValueListDuplicate(FcValueListPtr orig)
+{
+    FcValueListPtr new = NULL, l, t = NULL;
+    FcValue v;
+
+    for (l = orig; l != NULL; l = FcValueListNext (l))
+    {
+	if (!new)
+	{
+	    t = new = FcValueListCreate();
+	}
+	else
+	{
+	    t->next = FcValueListCreate();
+	    t = FcValueListNext (t);
+	}
+	v = FcValueCanonicalize (&l->value);
+	t->value = FcValueSave (v);
+	t->binding = l->binding;
+	t->next = NULL;
+    }
+
+    return new;
+}
+
 FcBool
 FcValueEqual (FcValue va, FcValue vb)
 {
@@ -460,6 +549,59 @@ FcPatternEqualSubset (const FcPattern *pai, const FcPattern *pbi, const FcObject
     return FcTrue;
 }
 
+FcBool
+FcPatternObjectListAdd (FcPattern	*p,
+			FcObject	object,
+			FcValueListPtr	list,
+			FcBool		append)
+{
+    FcPatternElt   *e;
+    FcValueListPtr l, *prev;
+
+    if (p->ref == FC_REF_CONSTANT)
+	goto bail0;
+
+    /*
+     * Make sure the stored type is valid for built-in objects
+     */
+    for (l = list; l != NULL; l = FcValueListNext (l))
+    {
+	if (!FcObjectValidType (object, l->value.type))
+	{
+	    if (FcDebug() & FC_DBG_OBJTYPES)
+	    {
+		printf ("FcPattern object %s does not accept value ",
+			FcObjectName (object));
+		FcValuePrint (l->value);
+	    }
+	    goto bail0;
+	}
+    }
+
+    e = FcPatternObjectInsertElt (p, object);
+    if (!e)
+	goto bail0;
+
+    if (append)
+    {
+	for (prev = &e->values; *prev; prev = &(*prev)->next)
+	    ;
+	*prev = list;
+    }
+    else
+    {
+	for (prev = &list; *prev; prev = &(*prev)->next)
+	    ;
+	*prev = e->values;
+	e->values = list;
+    }
+
+    return FcTrue;
+
+bail0:
+    return FcFalse;
+}
+
 FcBool
 FcPatternObjectAddWithBinding  (FcPattern	*p,
 				FcObject	object,
@@ -473,12 +615,10 @@ FcPatternObjectAddWithBinding  (FcPattern	*p,
     if (p->ref == FC_REF_CONSTANT)
 	goto bail0;
 
-    new = malloc (sizeof (FcValueList));
+    new = FcValueListCreate ();
     if (!new)
 	goto bail0;
 
-    memset(new, 0, sizeof (FcValueList));
-    FcMemAlloc (FC_MEM_VALLIST, sizeof (FcValueList));
     value = FcValueSave (value);
     if (value.type == FcTypeVoid)
 	goto bail1;