When fc-cache is run without --force, use directory cache files to speed up

fc-cache run time.

src/fccache.c

@@ -46,7 +46,7 @@ FcDirCacheProduce (FcFontSet *set, FcCache * metadata);
 static FcBool
 FcDirCacheConsume (int fd, FcFontSet *set);
 
-static FcBool
+FcBool
 FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);
 
 static int
@@ -690,7 +690,7 @@ FcCacheRead (FcConfig *config, FcGlobalCache * cache)
 }
 
 /* read serialized state from the cache file */
-static FcBool
+FcBool
 FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir)
 {
     char *cache_file = (char *)FcStrPlus (dir, (FcChar8 *) "/" FC_DIR_CACHE_FILE);

src/fcdir.c

@@ -138,6 +138,9 @@ FcDirScanConfig (FcFontSet	*set,
 	 */
 	if (cache && FcGlobalCacheReadDir (set, dirs, cache, (char *)dir, config))
 	    return FcTrue;
+
+	if (FcDirCacheRead (set, dirs, dir))
+	    return FcTrue;
     }
     
     /* freed below */

src/fcint.h

@@ -445,6 +445,9 @@ FcCacheRead (FcConfig *config, FcGlobalCache * cache);
 FcBool
 FcDirCacheWrite (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir);
 
+FcBool
+FcDirCacheRead (FcFontSet * set, FcStrSet * dirs, const FcChar8 *dir);
+
 int
 FcCacheBankToIndex (int bank);