2 * Copyright (C) 2005 Junio C Hamano
9 static int detect_rename = 0;
10 static int diff_score_opt = 0;
11 static int generate_patch = 1;
12 static const char *pickaxe = NULL;
14 static int parse_oneside_change(const char *cp, int *mode,
15 unsigned char *sha1, char *path)
20 while ((ch = *cp) && '0' <= ch && ch <= '7') {
21 m = (m << 3) | (ch - '0');
25 if (strncmp(cp, "\tblob\t", 6) && strncmp(cp, " blob ", 6) &&
26 strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6))
29 if (get_sha1_hex(cp, sha1))
32 if ((*cp != '\t') && *cp != ' ')
38 static int parse_diff_raw_output(const char *buf)
41 unsigned char old_sha1[20], new_sha1[20];
43 int ch, old_mode, new_mode;
50 if (parse_oneside_change(cp, &new_mode, new_sha1, path))
52 diff_addremove('+', new_mode, new_sha1, path, NULL);
55 if (parse_oneside_change(cp, &old_mode, old_sha1, path))
57 diff_addremove('-', old_mode, old_sha1, path, NULL);
60 old_mode = new_mode = 0;
61 while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
62 old_mode = (old_mode << 3) | (ch - '0');
65 if (strncmp(cp, "->", 2))
68 while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
69 new_mode = (new_mode << 3) | (ch - '0');
72 if (strncmp(cp, "\tblob\t", 6) && strncmp(cp, " blob ", 6) &&
73 strncmp(cp, "\ttree\t", 6) && strncmp(cp, " tree ", 6))
76 if (get_sha1_hex(cp, old_sha1))
79 if (strncmp(cp, "->", 2))
82 if (get_sha1_hex(cp, new_sha1))
85 if ((*cp != '\t') && *cp != ' ')
88 diff_change(old_mode, new_mode, old_sha1, new_sha1, path, NULL);
96 static const char *diff_helper_usage =
97 "git-diff-helper [-z] [-R] [-M] [-C] [-S<string>] paths...";
99 int main(int ac, const char **av) {
102 int line_termination = '\n';
106 while (1 < ac && av[1][0] == '-') {
109 else if (av[1][1] == 'z')
110 line_termination = 0;
111 else if (av[1][1] == 'p') /* hidden from the help */
113 else if (av[1][1] == 'M') {
115 diff_score_opt = diff_scoreopt_parse(av[1]);
117 else if (av[1][1] == 'C') {
119 diff_score_opt = diff_scoreopt_parse(av[1]);
121 else if (av[1][1] == 'S') {
125 usage(diff_helper_usage);
128 /* the remaining parameters are paths patterns */
130 diff_setup(detect_rename, diff_score_opt, pickaxe,
131 reverse, (generate_patch ? -1 : line_termination),
136 read_line(&sb, stdin, line_termination);
139 status = parse_diff_raw_output(sb.buf);
142 printf("%s%c", sb.buf, line_termination);