[cff] internal API is changed incompatibly for 16bit & ILP64 systems.

bias calculation is expected to be ILP32, LP64 or LLP64 systems (int = 32bit).
Some internal variables and internal APIs are extended to use 32bit type for 16bit systems.
Using long type is too large on LP64 systems,
and induces the incompatible change of the internal API for 32bit systems,
it should be avoided.

src/cff/cffgload.c

@@ -342,11 +342,11 @@
   /*                                                                       */
   /* <Return>                                                              */
   /*    The bias value.                                                    */
-  static FT_Int
+  static FT_Int32
   cff_compute_bias( FT_Int   in_charstring_type,
                     FT_UInt  num_subrs )
   {
-    FT_Int  result;
+    FT_Int32  result;
 
 
     if ( in_charstring_type == 1 )
@@ -2326,7 +2326,7 @@
               end = FT_MIN( idx + count, CFF_MAX_TRANS_ELEMENTS );
 
               if ( idx < end )
-                decoder->buildchar[idx] = 1 << 16;
+                decoder->buildchar[idx] = (FT_Fixed)1 << 16;
 
               for ( i = idx + 1; i < end; i++ )
                 decoder->buildchar[i] = 0;
@@ -2526,7 +2526,7 @@
 
         case cff_op_callsubr:
           {
-            FT_UInt  idx = (FT_UInt)( ( args[0] >> 16 ) +
+            FT_UInt32  idx = (FT_UInt32)( ( args[0] >> 16 ) +
                                       decoder->locals_bias );
 
 
@@ -2570,7 +2570,7 @@
 
         case cff_op_callgsubr:
           {
-            FT_UInt  idx = (FT_UInt)( ( args[0] >> 16 ) +
+            FT_UInt32  idx = (FT_UInt32)( ( args[0] >> 16 ) +
                                       decoder->globals_bias );
 
 

src/cff/cffgload.h

@@ -183,8 +183,8 @@ FT_BEGIN_HEADER
     FT_UInt            num_locals;
     FT_UInt            num_globals;
 
-    FT_Int             locals_bias;
-    FT_Int             globals_bias;
+    FT_Int32           locals_bias;
+    FT_Int32           globals_bias;
 
     FT_Byte**          locals;
     FT_Byte**          globals;