Function builtin_diffstat

diff.c:4182–4279

}

static void builtin_diffstat(const char *name_a, const char *name_b,
			     struct diff_filespec *one,
			     struct diff_filespec *two,
			     struct diffstat_t *diffstat,
			     struct diff_options *o,
			     struct diff_filepair *p)
{
	mmfile_t mf1, mf2;
	struct diffstat_file *data;
	int may_differ;
	int complete_rewrite = 0;

	if (!DIFF_PAIR_UNMERGED(p)) {
		if (p->status == DIFF_STATUS_MODIFIED && p->score)
			complete_rewrite = 1;
	}

	data = diffstat_add(diffstat, name_a, name_b);
	data->is_interesting = p->status != DIFF_STATUS_UNKNOWN;
	if (o->flags.stat_with_summary)
		data->comments = get_compact_summary(p, data->is_renamed);

	if (!one || !two) {
		data->is_unmerged = 1;
		return;
	}

	/* saves some reads if true, not a guarantee of diff outcome */
	may_differ = !(one->oid_valid && two->oid_valid &&
			oideq(&one->oid, &two->oid));

	if (diff_filespec_is_binary(o->repo, one) ||
	    diff_filespec_is_binary(o->repo, two)) {
		data->is_binary = 1;
		if (!may_differ) {
			data->added = 0;
			data->deleted = 0;
		} else {
			data->added = diff_filespec_size(o->repo, two);
			data->deleted = diff_filespec_size(o->repo, one);
		}
	}

	else if (complete_rewrite) {
		diff_populate_filespec(o->repo, one, NULL);
		diff_populate_filespec(o->repo, two, NULL);
		data->deleted = count_lines(one->data, one->size);
		data->added = count_lines(two->data, two->size);
	}

	else if (may_differ) {
		/* Crazy xdl interfaces.. */
		xpparam_t xpp;
		xdemitconf_t xecfg;

		if (fill_mmfile(o->repo, &mf1, one) < 0 ||
		    fill_mmfile(o->repo, &mf2, two) < 0)
			die("unable to read files to diff");