6 const char *commit_type = "commit";
8 enum cmit_fmt get_commit_format(const char *arg)
11 return CMIT_FMT_DEFAULT;
12 if (!strcmp(arg, "=raw"))
14 if (!strcmp(arg, "=medium"))
15 return CMIT_FMT_MEDIUM;
16 if (!strcmp(arg, "=short"))
17 return CMIT_FMT_SHORT;
18 if (!strcmp(arg, "=full"))
20 die("invalid --pretty format");
23 static struct commit *check_commit(struct object *obj, const unsigned char *sha1)
25 if (obj->type != commit_type) {
26 error("Object %s is a %s, not a commit",
27 sha1_to_hex(sha1), obj->type);
30 return (struct commit *) obj;
33 struct commit *lookup_commit_reference(const unsigned char *sha1)
35 struct object *obj = parse_object(sha1);
39 if (obj->type == tag_type)
40 obj = ((struct tag *)obj)->tagged;
41 return check_commit(obj, sha1);
44 struct commit *lookup_commit(const unsigned char *sha1)
46 struct object *obj = lookup_object(sha1);
48 struct commit *ret = xmalloc(sizeof(struct commit));
49 memset(ret, 0, sizeof(struct commit));
50 created_object(sha1, &ret->object);
51 ret->object.type = commit_type;
55 obj->type = commit_type;
56 return check_commit(obj, sha1);
59 static unsigned long parse_commit_date(const char *buf)
63 if (memcmp(buf, "author", 6))
65 while (*buf++ != '\n')
67 if (memcmp(buf, "committer", 9))
71 date = strtoul(buf, NULL, 10);
72 if (date == ULONG_MAX)
77 int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
79 void *bufptr = buffer;
80 unsigned char parent[20];
81 struct commit_list **pptr;
83 if (item->object.parsed)
85 item->object.parsed = 1;
86 get_sha1_hex(bufptr + 5, parent);
87 item->tree = lookup_tree(parent);
89 add_ref(&item->object, &item->tree->object);
90 bufptr += 46; /* "tree " + "hex sha1" + "\n" */
91 pptr = &item->parents;
92 while (!memcmp(bufptr, "parent ", 7) &&
93 !get_sha1_hex(bufptr + 7, parent)) {
94 struct commit *new_parent = lookup_commit(parent);
96 pptr = &commit_list_insert(new_parent, pptr)->next;
97 add_ref(&item->object, &new_parent->object);
101 item->date = parse_commit_date(bufptr);
105 int parse_commit(struct commit *item)
112 if (item->object.parsed)
114 buffer = read_sha1_file(item->object.sha1, type, &size);
116 return error("Could not read %s",
117 sha1_to_hex(item->object.sha1));
118 if (strcmp(type, commit_type)) {
120 return error("Object %s not a commit",
121 sha1_to_hex(item->object.sha1));
123 ret = parse_commit_buffer(item, buffer, size);
125 item->buffer = buffer;
132 struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
134 struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
135 new_list->item = item;
136 new_list->next = *list_p;
141 void free_commit_list(struct commit_list *list)
144 struct commit_list *temp = list;
150 void insert_by_date(struct commit_list **list, struct commit *item)
152 struct commit_list **pp = list;
153 struct commit_list *p;
154 while ((p = *pp) != NULL) {
155 if (p->item->date < item->date) {
160 commit_list_insert(item, pp);
164 void sort_by_date(struct commit_list **list)
166 struct commit_list *ret = NULL;
168 insert_by_date(&ret, (*list)->item);
169 *list = (*list)->next;
174 struct commit *pop_most_recent_commit(struct commit_list **list,
177 struct commit *ret = (*list)->item;
178 struct commit_list *parents = ret->parents;
179 struct commit_list *old = *list;
181 *list = (*list)->next;
185 struct commit *commit = parents->item;
186 parse_commit(commit);
187 if (!(commit->object.flags & mark)) {
188 commit->object.flags |= mark;
189 insert_by_date(list, commit);
191 parents = parents->next;
197 * Generic support for pretty-printing the header
199 static int get_one_line(const char *msg, unsigned long len)
214 static int add_user_info(const char *what, enum cmit_fmt fmt, char *buf, const char *line)
217 unsigned int namelen;
221 date = strchr(line, '>');
224 namelen = ++date - line;
225 time = strtoul(date, &date, 10);
226 tz = strtol(date, NULL, 10);
228 ret = sprintf(buf, "%s: %.*s\n", what, namelen, line);
229 if (fmt == CMIT_FMT_MEDIUM)
230 ret += sprintf(buf + ret, "Date: %s\n", show_date(time, tz));
234 static int is_empty_line(const char *line, int len)
236 while (len && isspace(line[len-1]))
241 static int add_parent_info(enum cmit_fmt fmt, char *buf, const char *line, int parents)
248 /* Go back to the previous line: 40 characters of previous parent, and one '\n' */
249 offset = sprintf(buf, "Merge: %.40s\n", line-41);
252 /* Replace the previous '\n' with a space */
254 offset += sprintf(buf + offset, "%.40s\n", line+7);
259 unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space)
261 int hdr = 1, body = 0;
262 unsigned long offset = 0;
266 const char *line = msg;
267 int linelen = get_one_line(msg, len);
273 * We want some slop for indentation and a possible
274 * final "...". Thus the "+ 20".
276 if (offset + linelen + 20 > space) {
277 memcpy(buf + offset, " ...\n", 8);
287 buf[offset++] = '\n';
290 if (fmt == CMIT_FMT_RAW) {
291 memcpy(buf + offset, line, linelen);
295 if (!memcmp(line, "parent ", 7)) {
297 die("bad parent line in commit");
298 offset += add_parent_info(fmt, buf + offset, line, ++parents);
300 if (!memcmp(line, "author ", 7))
301 offset += add_user_info("Author", fmt, buf + offset, line + 7);
302 if (fmt == CMIT_FMT_FULL) {
303 if (!memcmp(line, "committer ", 10))
304 offset += add_user_info("Commit", fmt, buf + offset, line + 10);
309 if (is_empty_line(line, linelen)) {
312 if (fmt == CMIT_FMT_SHORT)
317 memset(buf + offset, ' ', 4);
318 memcpy(buf + offset + 4, line, linelen);
319 offset += linelen + 4;
321 /* Make sure there is an EOLN */
322 if (buf[offset - 1] != '\n')
323 buf[offset++] = '\n';
328 struct commit *pop_commit(struct commit_list **stack)
330 struct commit_list *top = *stack;
331 struct commit *item = top ? top->item : NULL;
340 int count_parents(struct commit * commit)
343 struct commit_list * parents = commit->parents;
344 for (count=0;parents; parents=parents->next,count++)