[sfnt] Avoid left shift of negative value (#48980).

* src/sfnt/ttsbit.c (tt_sbit_decoder_load_bit_aligned): Use unsigned constant.
8 years ago · d8ef726611
parent 16583ccde9
commit d8ef726611
2 changed files with 9 additions and 2 deletions
--- a/9
+++ b/9
@ -1,4 +1,11 @@
-2016-09-02  Werner Lemberg  <wl@gnu.org>.
+2016-09-02  Werner Lemberg  <wl@gnu.org>
+
+	[sfnt] Avoid left shift of negative value (#48980).
+
+	* src/sfnt/ttsbit.c (tt_sbit_decoder_load_bit_aligned): Use unsigned
+	constant.
+
+2016-09-02  Werner Lemberg  <wl@gnu.org>

 	* src/smooth/ftgrays.c (gray_hline): Fix clang compiler warnings.

--- a/src/sfnt/ttsbit.c
+++ b/src/sfnt/ttsbit.c
@ -881,7 +881,7 @@
        }

        *pwrite++ |= ( ( rval >> nbits ) & 0xFF ) &
-                     ( ~( 0xFF << w ) << ( 8 - w - x_pos ) );
+                     ( ~( 0xFFU << w ) << ( 8 - w - x_pos ) );
        rval     <<= 8;

        w = line_bits - w;