- unsigned mode1, mode2;
- const char *path1, *path2;
- const unsigned char *sha1, *sha2;
- int cmp, pathlen1, pathlen2;
- char old_sha1_hex[50];
-
- sha1 = extract(tree1, size1, &path1, &mode1);
- sha2 = extract(tree2, size2, &path2, &mode2);
-
- pathlen1 = strlen(path1);
- pathlen2 = strlen(path2);
- cmp = cache_name_compare(path1, pathlen1, path2, pathlen2);
- if (cmp < 0) {
- show_file("-", tree1, size1, base);
- return -1;
- }
- if (cmp > 0) {
- show_file("+", tree2, size2, base);
- return 1;
- }
- if (!memcmp(sha1, sha2, 20) && mode1 == mode2)
- return 0;
-
- /*
- * If the filemode has changed to/from a directory from/to a regular
- * file, we need to consider it a remove and an add.
- */
- if (S_ISDIR(mode1) != S_ISDIR(mode2)) {
- show_file("-", tree1, size1, base);
- show_file("+", tree2, size2, base);
- return 0;
- }
-
- if (recursive && S_ISDIR(mode1)) {
- int retval;
- char *newbase = malloc_base(base, path1, pathlen1);
- retval = diff_tree_sha1(sha1, sha2, newbase);
- free(newbase);
- return retval;
- }
-
- if (header) {
- printf("%s", header);
- header = NULL;
- }
- if (silent)
- return 0;