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Author: Manoj Gupta <manojgupta@google.com>
Use unsigned 1 for shifting instead of signed 1.
This fixed an issue with shift caught by undefined behavior
sanitizer in clang.
bzip2-1.0.6/blocksort.c:255:7
runtime error: left shift of 1 by 31 places cannot be represented in type 'int'
--- a/blocksort.c
+++ b/blocksort.c
@@ -202,9 +202,9 @@ void fallbackQSort3 ( UInt32* fmap,
bhtab [ 0 .. 2+(nblock/32) ] destroyed
*/
-#define SET_BH(zz) bhtab[(zz) >> 5] |= (1 << ((zz) & 31))
-#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1 << ((zz) & 31))
-#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1 << ((zz) & 31)))
+#define SET_BH(zz) bhtab[(zz) >> 5] |= (1u << ((zz) & 31))
+#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~(1u << ((zz) & 31))
+#define ISSET_BH(zz) (bhtab[(zz) >> 5] & (1u << ((zz) & 31)))
#define WORD_BH(zz) bhtab[(zz) >> 5]
#define UNALIGNED_BH(zz) ((zz) & 0x01f)
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