unsigned char sha1[20];
unsigned long date;
struct parent *parent;
+ char tag[1];
};
static struct revision **revs;
return -first-1;
}
-static struct revision *lookup_rev(unsigned char *sha1)
+static struct revision *lookup_rev(unsigned char *sha1, const char *tag)
{
int pos = find_rev(sha1);
struct revision *n;
- if (pos >= 0)
- return revs[pos];
+ if (pos >= 0) {
+ n = revs[pos];
+ if (strcmp(n->tag, tag))
+ error("expected tag %s on object %s: got %s", tag, sha1_to_hex(sha1), n->tag);
+ return n;
+ }
pos = -pos-1;
rev_allocs = alloc_nr(rev_allocs);
revs = realloc(revs, rev_allocs * sizeof(struct revision *));
}
- n = malloc(sizeof(struct revision));
+ n = malloc(sizeof(struct revision) + strlen(tag));
n->flags = 0;
memcpy(n->sha1, sha1, 20);
n->parent = NULL;
+ strcpy(n->tag, tag);
/* Insert it into the right place */
memmove(revs + pos + 1, revs + pos, (nr_revs - pos) * sizeof(struct revision *));
return n;
}
-static struct revision *add_relationship(struct revision *rev, unsigned char *needs)
+static struct revision *add_relationship(struct revision *rev, unsigned char *needs, const char *tag)
{
- struct revision *parent_rev = lookup_rev(needs);
+ struct revision *parent_rev = lookup_rev(needs, tag);
struct parent **pp = &rev->parent, *p;
while ((p = *pp) != NULL) {
return parent_rev;
}
-static void mark_reachable(struct revision *rev)
+static void mark_reachable(struct revision *rev, unsigned int mask)
{
struct parent *p = rev->parent;
/* If we've been here already, don't bother */
- if (rev->flags & REACHABLE)
+ if (rev->flags & mask)
return;
- rev->flags |= REACHABLE | USED;
+ rev->flags |= mask | USED;
while (p) {
- mark_reachable(p->parent);
+ mark_reachable(p->parent, mask);
p = p->next;
}
}
+static unsigned long parse_commit_date(const char *buf)
+{
+ unsigned long date;
+
+ if (memcmp(buf, "author", 6))
+ return 0;
+ while (*buf++ != '\n')
+ /* nada */;
+ if (memcmp(buf, "committer", 9))
+ return 0;
+ while (*buf++ != '>')
+ /* nada */;
+ date = strtoul(buf, NULL, 10);
+ if (date == ULONG_MAX)
+ date = 0;
+ return date;
+}
+
+static struct revision * parse_commit(unsigned char *sha1)
+{
+ struct revision *rev = lookup_rev(sha1, "commit");
+
+ if (!(rev->flags & SEEN)) {
+ void *buffer, *bufptr;
+ unsigned long size;
+ char type[20];
+ unsigned char parent[20];
+
+ rev->flags |= SEEN;
+ buffer = bufptr = read_sha1_file(sha1, type, &size);
+ if (!buffer || strcmp(type, "commit"))
+ die("%s is not a commit object", sha1_to_hex(sha1));
+ bufptr += 46; /* "tree " + "hex sha1" + "\n" */
+ while (!memcmp(bufptr, "parent ", 7) && !get_sha1_hex(bufptr+7, parent)) {
+ add_relationship(rev, parent, "commit");
+ parse_commit(parent);
+ bufptr += 48; /* "parent " + "hex sha1" + "\n" */
+ }
+ rev->date = parse_commit_date(bufptr);
+ free(buffer);
+ }
+ return rev;
+}
+
#endif /* REVISION_H */