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diff: fix a double off-by-one with --ignore-space-at-eol

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When comparing two lines, ignoring any whitespace at the end, we first
try to match as many bytes as possible and break out of the loop only
upon mismatch, to let the remainder be handled by the code shared with
the other whitespace-ignoring code paths.

When comparing the bytes, however, we incremented the counters always,
even if the bytes did not match. And because we fall through to  the
space-at-eol handling at that point, it is as if that mismatch never
happened.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2016-07-09 09:23:55 +02:00
committed by Junio C Hamano
parent a5229cc951
commit 044fb190f7
3 changed files with 6 additions and 4 deletions
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6
xdiff/xutils.c
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@ -200,8 +200,10 @@ int xdl_recmatch(const char *l1, long s1, const char *l2, long s2, long flags)
return 0;
}
} else if (flags & XDF_IGNORE_WHITESPACE_AT_EOL) {
while (i1 < s1 && i2 < s2 && l1[i1++] == l2[i2++])
; /* keep going */
while (i1 < s1 && i2 < s2 && l1[i1] == l2[i2]) {
i1++;
i2++;
}
}
/*