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diff.c: move diffcore_skip_stat_unmatch core logic out for reuse later 

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Nguyễn Thái Ngọc Duy 2014-01-25 13:46:49 +07:00 committed by Junio C Hamano
parent 2f93541d88
commit fceb907225
1 changed files with 28 additions and 21 deletions
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49
diff.c
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@ -4592,6 +4592,33 @@ static int diff_filespec_is_identical(struct diff_filespec *one,
return !memcmp(one->data, two->data, one->size);
}

static int diff_filespec_check_stat_unmatch(struct diff_filepair *p)
{
/*
* 1. Entries that come from stat info dirtiness
* always have both sides (iow, not create/delete),
* one side of the object name is unknown, with
* the same mode and size. Keep the ones that
* do not match these criteria. They have real
* differences.
*
* 2. At this point, the file is known to be modified,
* with the same mode and size, and the object
* name of one side is unknown. Need to inspect
* the identical contents.
*/
if (!DIFF_FILE_VALID(p->one) || /* (1) */
!DIFF_FILE_VALID(p->two) ||
(p->one->sha1_valid && p->two->sha1_valid) ||
(p->one->mode != p->two->mode) ||
diff_populate_filespec(p->one, 1) ||
diff_populate_filespec(p->two, 1) ||
(p->one->size != p->two->size) ||
!diff_filespec_is_identical(p->one, p->two)) /* (2) */
return 1;
return 0;
}

static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
{
int i;
@ -4602,27 +4629,7 @@ static void diffcore_skip_stat_unmatch(struct diff_options *diffopt)
for (i = 0; i < q->nr; i++) {
struct diff_filepair *p = q->queue[i];

/*
* 1. Entries that come from stat info dirtiness
* always have both sides (iow, not create/delete),
* one side of the object name is unknown, with
* the same mode and size. Keep the ones that
* do not match these criteria. They have real
* differences.
*
* 2. At this point, the file is known to be modified,
* with the same mode and size, and the object
* name of one side is unknown. Need to inspect
* the identical contents.
*/
if (!DIFF_FILE_VALID(p->one) || /* (1) */
!DIFF_FILE_VALID(p->two) ||
(p->one->sha1_valid && p->two->sha1_valid) ||
(p->one->mode != p->two->mode) ||
diff_populate_filespec(p->one, 1) ||
diff_populate_filespec(p->two, 1) ||
(p->one->size != p->two->size) ||
!diff_filespec_is_identical(p->one, p->two)) /* (2) */
if (diff_filespec_check_stat_unmatch(p))
diff_q(&outq, p);
else {
/*