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xdiff: avoid compiler warnings with XDL_FAST_HASH on 32-bit machines

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Import macro REPEAT_BYTE from Linux (arch/x86/include/asm/word-at-a-time.h)
to avoid 64-bit integer literals, which cause some 32-bit compilers to
print warnings.

Reported-by: Øyvind A. Holm <sunny@sunbase.org>
Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2012-05-22 22:36:25 +02:00 committed by Junio C Hamano
parent 6f1af028ce
commit 9322ce21ee
1 changed files with 5 additions and 3 deletions
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8
xdiff/xutils.c
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@ -280,9 +280,11 @@ static unsigned long xdl_hash_record_with_whitespace(char const **data,
#ifdef XDL_FAST_HASH
#define ONEBYTES 0x0101010101010101ul
#define NEWLINEBYTES 0x0a0a0a0a0a0a0a0aul
#define HIGHBITS 0x8080808080808080ul
#define REPEAT_BYTE(x) ((~0ul / 0xff) * (x))
#define ONEBYTES REPEAT_BYTE(0x01)
#define NEWLINEBYTES REPEAT_BYTE(0x0a)
#define HIGHBITS REPEAT_BYTE(0x80)
/* Return the high bit set in the first byte that is a zero */
static inline unsigned long has_zero(unsigned long a)