bdf: Fix some data types mismatching with their sources.

ChangeLog

@@ -1,3 +1,14 @@
+2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
+
+	bdf: Fix some data types mismatching with their sources.
+
+	* src/bdf/bdrdrivr.c (bdf_cmap_char_index): The type
+	of `code' is matched with BDF_encoding_el->enc.
+	(bdf_cmap_char_next): The type of `charcode' is
+	matched with BDF_encoding_el->enc.  When *acharcode
+	is set by charcode, an overflow is checked and
+	casted to unsigned 32-bit integer.
+
 2009-07-31  suzuki toshiya <mpsuzuki@hiroshima-u.ac.jp>
 
 	autofit: Improve Unicode range definitions.

src/bdf/bdfdrivr.c

@@ -101,7 +101,7 @@ THE SOFTWARE.
 
     while ( min < max )
     {
-      FT_UInt32  code;
+      FT_ULong  code;
 
 
       mid  = ( min + max ) >> 1;
@@ -133,7 +133,7 @@ THE SOFTWARE.
     BDF_encoding_el*  encodings = cmap->encodings;
     FT_ULong          min, max, mid; /* num_encodings */
     FT_UShort         result   = 0;  /* encodings->glyph */
-    FT_UInt32         charcode = *acharcode + 1;
+    FT_ULong          charcode = *acharcode + 1;
 
 
     min = 0;
@@ -169,7 +169,14 @@ THE SOFTWARE.
     }
 
   Exit:
-    *acharcode = charcode;
+    if ( charcode > 0xFFFFFFFFUL )
+    {
+      FT_TRACE1(( "bdf_cmap_char_next: charcode 0x%x > 32bit API" ));
+      *acharcode = 0;
+      /* XXX: result should be changed to indicate an overflow error */
+    }
+    else
+      *acharcode = (FT_UInt32)charcode;
     return result;
   }