6 const char *commit_type = "commit";
8 static struct commit *check_commit(struct object *obj, unsigned char *sha1)
10 if (obj->type != commit_type) {
11 error("Object %s is a %s, not a commit",
12 sha1_to_hex(sha1), obj->type);
15 return (struct commit *) obj;
18 struct commit *lookup_commit_reference(unsigned char *sha1)
20 struct object *obj = parse_object(sha1);
24 if (obj->type == tag_type)
25 obj = ((struct tag *)obj)->tagged;
26 return check_commit(obj, sha1);
29 struct commit *lookup_commit(unsigned char *sha1)
31 struct object *obj = lookup_object(sha1);
33 struct commit *ret = xmalloc(sizeof(struct commit));
34 memset(ret, 0, sizeof(struct commit));
35 created_object(sha1, &ret->object);
36 ret->object.type = commit_type;
40 obj->type = commit_type;
41 return check_commit(obj, sha1);
44 static unsigned long parse_commit_date(const char *buf)
48 if (memcmp(buf, "author", 6))
50 while (*buf++ != '\n')
52 if (memcmp(buf, "committer", 9))
56 date = strtoul(buf, NULL, 10);
57 if (date == ULONG_MAX)
62 int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size)
64 void *bufptr = buffer;
65 unsigned char parent[20];
67 if (item->object.parsed)
69 item->object.parsed = 1;
70 get_sha1_hex(bufptr + 5, parent);
71 item->tree = lookup_tree(parent);
73 add_ref(&item->object, &item->tree->object);
74 bufptr += 46; /* "tree " + "hex sha1" + "\n" */
75 while (!memcmp(bufptr, "parent ", 7) &&
76 !get_sha1_hex(bufptr + 7, parent)) {
77 struct commit *new_parent = lookup_commit(parent);
79 commit_list_insert(new_parent, &item->parents);
80 add_ref(&item->object, &new_parent->object);
84 item->date = parse_commit_date(bufptr);
88 int parse_commit(struct commit *item)
95 if (item->object.parsed)
97 buffer = read_sha1_file(item->object.sha1, type, &size);
99 return error("Could not read %s",
100 sha1_to_hex(item->object.sha1));
101 if (strcmp(type, commit_type)) {
103 return error("Object %s not a commit",
104 sha1_to_hex(item->object.sha1));
106 ret = parse_commit_buffer(item, buffer, size);
108 item->buffer = buffer;
115 struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
117 struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
118 new_list->item = item;
119 new_list->next = *list_p;
124 void free_commit_list(struct commit_list *list)
127 struct commit_list *temp = list;
133 void insert_by_date(struct commit_list **list, struct commit *item)
135 struct commit_list **pp = list;
136 struct commit_list *p;
137 while ((p = *pp) != NULL) {
138 if (p->item->date < item->date) {
143 commit_list_insert(item, pp);
147 void sort_by_date(struct commit_list **list)
149 struct commit_list *ret = NULL;
151 insert_by_date(&ret, (*list)->item);
152 *list = (*list)->next;
157 struct commit *pop_most_recent_commit(struct commit_list **list,
160 struct commit *ret = (*list)->item;
161 struct commit_list *parents = ret->parents;
162 struct commit_list *old = *list;
164 *list = (*list)->next;
168 struct commit *commit = parents->item;
169 parse_commit(commit);
170 if (!(commit->object.flags & mark)) {
171 commit->object.flags |= mark;
172 insert_by_date(list, commit);
174 parents = parents->next;
180 * Generic support for pretty-printing the header
182 static int get_one_line(const char *msg, unsigned long len)
197 static int add_author_info(enum cmit_fmt fmt, char *buf, const char *line, int len)
200 unsigned int namelen;
204 line += strlen("author ");
205 date = strchr(line, '>');
208 namelen = ++date - line;
209 time = strtoul(date, &date, 10);
210 tz = strtol(date, NULL, 10);
212 ret = sprintf(buf, "Author: %.*s\n", namelen, line);
213 if (fmt == CMIT_FMT_MEDIUM)
214 ret += sprintf(buf + ret, "Date: %s\n", show_date(time, tz));
218 static int is_empty_line(const char *line, int len)
220 while (len && isspace(line[len-1]))
225 unsigned long pretty_print_commit(enum cmit_fmt fmt, const char *msg, unsigned long len, char *buf, unsigned long space)
227 int hdr = 1, body = 0;
228 unsigned long offset = 0;
231 const char *line = msg;
232 int linelen = get_one_line(msg, len);
238 * We want some slop for indentation and a possible
239 * final "...". Thus the "+ 20".
241 if (offset + linelen + 20 > space) {
242 memcpy(buf + offset, " ...\n", 8);
252 buf[offset++] = '\n';
255 if (fmt == CMIT_FMT_RAW) {
256 memcpy(buf + offset, line, linelen);
260 if (!memcmp(line, "author ", 7))
261 offset += add_author_info(fmt, buf + offset, line, linelen);
265 if (is_empty_line(line, linelen)) {
268 if (fmt == CMIT_FMT_SHORT)
273 memset(buf + offset, ' ', 4);
274 memcpy(buf + offset + 4, line, linelen);
275 offset += linelen + 4;
277 /* Make sure there is an EOLN */
278 if (buf[offset - 1] != '\n')
279 buf[offset++] = '\n';
284 struct commit *pop_commit(struct commit_list **stack)
286 struct commit_list *top = *stack;
287 struct commit *item = top ? top->item : NULL;
296 int count_parents(struct commit * commit)
299 struct commit_list * parents = commit->parents;
300 for (count=0;parents; parents=parents->next,count++)