summaryrefslogtreecommitdiff
path: root/match-trees.c
diff options
context:
space:
mode:
Diffstat (limited to 'match-trees.c')
-rw-r--r--match-trees.c68
1 files changed, 28 insertions, 40 deletions
diff --git a/match-trees.c b/match-trees.c
index 26f7ed143e..2bb734d51c 100644
--- a/match-trees.c
+++ b/match-trees.c
@@ -47,6 +47,13 @@ static int score_matches(unsigned mode1, unsigned mode2, const char *path)
return score;
}
+static int base_name_entries_compare(const struct name_entry *a,
+ const struct name_entry *b)
+{
+ return base_name_compare(a->path, tree_entry_len(a), a->mode,
+ b->path, tree_entry_len(b), b->mode);
+}
+
/*
* Inspect two trees, and give a score that tells how similar they are.
*/
@@ -71,54 +78,35 @@ static int score_trees(const unsigned char *hash1, const unsigned char *hash2)
if (type != OBJ_TREE)
die("%s is not a tree", sha1_to_hex(hash2));
init_tree_desc(&two, two_buf, size);
- while (one.size | two.size) {
- const unsigned char *elem1 = elem1;
- const unsigned char *elem2 = elem2;
- const char *path1 = path1;
- const char *path2 = path2;
- unsigned mode1 = mode1;
- unsigned mode2 = mode2;
+ for (;;) {
+ struct name_entry e1, e2;
+ int got_entry_from_one = tree_entry(&one, &e1);
+ int got_entry_from_two = tree_entry(&two, &e2);
int cmp;
- if (one.size)
- elem1 = tree_entry_extract(&one, &path1, &mode1);
- if (two.size)
- elem2 = tree_entry_extract(&two, &path2, &mode2);
-
- if (!one.size) {
- /* two has more entries */
- score += score_missing(mode2, path2);
- update_tree_entry(&two);
- continue;
- }
- if (!two.size) {
+ if (got_entry_from_one && got_entry_from_two)
+ cmp = base_name_entries_compare(&e1, &e2);
+ else if (got_entry_from_one)
/* two lacks this entry */
- score += score_missing(mode1, path1);
- update_tree_entry(&one);
- continue;
- }
- cmp = base_name_compare(path1, strlen(path1), mode1,
- path2, strlen(path2), mode2);
- if (cmp < 0) {
+ cmp = -1;
+ else if (got_entry_from_two)
+ /* two has more entries */
+ cmp = 1;
+ else
+ break;
+
+ if (cmp < 0)
/* path1 does not appear in two */
- score += score_missing(mode1, path1);
- update_tree_entry(&one);
- continue;
- }
- else if (cmp > 0) {
+ score += score_missing(e1.mode, e1.path);
+ else if (cmp > 0)
/* path2 does not appear in one */
- score += score_missing(mode2, path2);
- update_tree_entry(&two);
- continue;
- }
- else if (hashcmp(elem1, elem2))
+ score += score_missing(e2.mode, e2.path);
+ else if (hashcmp(e1.sha1, e2.sha1))
/* they are different */
- score += score_differs(mode1, mode2, path1);
+ score += score_differs(e1.mode, e2.mode, e1.path);
else
/* same subtree or blob */
- score += score_matches(mode1, mode2, path1);
- update_tree_entry(&one);
- update_tree_entry(&two);
+ score += score_matches(e1.mode, e2.mode, e1.path);
}
free(one_buf);
free(two_buf);