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combine-diff: factor out stat-format mask 

There are several conditionals in the combine diff code that check if
we're doing --stat or --numstat output. Since these must all remain in
sync, let's pull them out into a separate bit-mask.

Arguably this could go into diff.h along with the other DIFF_FORMAT
macros, but it's not clear that the definition of "which formats are
stat" is universal (e.g., does --dirstat count? --summary?). So let's
keep this local to combine-diff.c, where the meaning is more clearly
"stat formats that combine-diff supports".

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2019-01-24 07:33:51 -05:00 committed by Junio C Hamano
parent 48edf3a02a
commit 8817f0cc67
1 changed files with 8 additions and 6 deletions
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14
combine-diff.c
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@ -1321,6 +1321,11 @@ static const char *path_path(void *obj)
return path->path;
}
/*
* Diff stat formats which we always compute solely against the first parent.
*/
#define STAT_FORMAT_MASK (DIFF_FORMAT_NUMSTAT \
| DIFF_FORMAT_DIFFSTAT)
/* find set of paths that every parent touches */
static struct combine_diff_path *find_paths_generic(const struct object_id *oid,
@ -1342,8 +1347,7 @@ static struct combine_diff_path *find_paths_generic(const struct object_id *oid,
* show stat against the first parent even when doing
* combined diff.
*/
int stat_opt = (output_format &
(DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
int stat_opt = output_format & STAT_FORMAT_MASK;
if (i == 0 && stat_opt)
opt->output_format = stat_opt;
else
@ -1470,8 +1474,7 @@ void diff_tree_combined(const struct object_id *oid,
* show stat against the first parent even
* when doing combined diff.
*/
stat_opt = (opt->output_format &
(DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT));
stat_opt = opt->output_format & STAT_FORMAT_MASK;
if (stat_opt) {
diffopts.output_format = stat_opt;
@ -1515,8 +1518,7 @@ void diff_tree_combined(const struct object_id *oid,
show_raw_diff(p, num_parent, rev);
needsep = 1;
}
else if (opt->output_format &
(DIFF_FORMAT_NUMSTAT|DIFF_FORMAT_DIFFSTAT))
else if (opt->output_format & STAT_FORMAT_MASK)
needsep = 1;
else if (opt->output_format & DIFF_FORMAT_CALLBACK)
handle_combined_callback(opt, paths, num_parent, num_paths);