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diffcore-break: micro-optimize by avoiding delta between identical files. 

We did not check if we have the same file on both sides when
computing break score.  This is usually not a problem, but if
the user said --find-copies-harde with -B, we ended up trying a
delta between the same data even when we know the SHA1 hash of
both sides match.

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-02-28 20:19:47 -08:00
parent e3601e8bb7
commit aeecd23ae2
1 changed files with 4 additions and 0 deletions
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diffcore-break.c
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@ -58,6 +58,10 @@ static int should_break(struct diff_filespec *src,
if (!S_ISREG(src->mode) || !S_ISREG(dst->mode))
return 0; /* leave symlink rename alone */
if (src->sha1_valid && dst->sha1_valid &&
!memcmp(src->sha1, dst->sha1, 20))
return 0; /* they are the same */
if (diff_populate_filespec(src, 0) || diff_populate_filespec(dst, 0))
return 0; /* error but caught downstream */