Function process_ranges_merge_commit

line-log.c:1073–1135

}

static int process_ranges_merge_commit(struct rev_info *rev, struct commit *commit,
				       struct line_log_data *range)
{
	struct line_log_data **cand;
	struct commit_list *p;
	int i;
	int nparents = commit_list_count(commit->parents);
	int ret;

	if (nparents > 1 && rev->first_parent_only)
		nparents = 1;

	CALLOC_ARRAY(cand, nparents);

	for (p = commit->parents, i = 0;
	     p && i < nparents;
	     p = p->next, i++) {
		struct commit *parent = p->item;
		struct diff_queue_struct diffqueue = DIFF_QUEUE_INIT;
		int changed;

		queue_diffs(range, &rev->diffopt, &diffqueue, commit, parent);

		changed = process_all_files(&cand[i], rev, &diffqueue, range);
		diff_queue_clear(&diffqueue);
		if (!changed) {
			/*
			 * This parent can take all the blame, so we
			 * don't follow any other path in history
			 */
			add_line_range(rev, parent, cand[i]);
			commit_list_free(commit->parents);
			commit_list_append(parent, &commit->parents);

			ret = 0;
			goto out;
		}
	}

	/*
	 * No single parent took the blame.  We add the candidates
	 * from the above loop to the parents.
	 */
	for (p = commit->parents, i = 0;
	     p && i < nparents;
	     p = p->next, i++)
		add_line_range(rev, p->item, cand[i]);

	ret = 1;

out:
	clear_commit_line_range(rev, commit);
	for (i = 0; i < nparents; i++) {
		if (!cand[i])
			continue;
		line_log_data_clear(cand[i]);
		free(cand[i]);
	}