struct ref_list **new_entry)
{
int len;
- struct ref_list **p = &list, *entry;
-
- /* Find the place to insert the ref into.. */
- while ((entry = *p) != NULL) {
- int cmp = strcmp(entry->name, name);
- if (cmp > 0)
- break;
-
- /* Same as existing entry? */
- if (!cmp) {
- if (new_entry)
- *new_entry = entry;
- return list;
- }
- p = &entry->next;
- }
+ struct ref_list *entry;
/* Allocate it and add it in.. */
len = strlen(name) + 1;
hashclr(entry->peeled);
memcpy(entry->name, name, len);
entry->flag = flag;
- entry->next = *p;
- *p = entry;
+ entry->next = list;
if (new_entry)
*new_entry = entry;
- return list;
+ return entry;
+}
+
+/* merge sort the ref list */
+static struct ref_list *sort_ref_list(struct ref_list *list)
+{
+ int psize, qsize, last_merge_count, cmp;
+ struct ref_list *p, *q, *l, *e;
+ struct ref_list *new_list = list;
+ int k = 1;
+ int merge_count = 0;
+
+ if (!list)
+ return list;
+
+ do {
+ last_merge_count = merge_count;
+ merge_count = 0;
+
+ psize = 0;
+
+ p = new_list;
+ q = new_list;
+ new_list = NULL;
+ l = NULL;
+
+ while (p) {
+ merge_count++;
+
+ while (psize < k && q->next) {
+ q = q->next;
+ psize++;
+ }
+ qsize = k;
+
+ while ((psize > 0) || (qsize > 0 && q)) {
+ if (qsize == 0 || !q) {
+ e = p;
+ p = p->next;
+ psize--;
+ } else if (psize == 0) {
+ e = q;
+ q = q->next;
+ qsize--;
+ } else {
+ cmp = strcmp(q->name, p->name);
+ if (cmp < 0) {
+ e = q;
+ q = q->next;
+ qsize--;
+ } else if (cmp > 0) {
+ e = p;
+ p = p->next;
+ psize--;
+ } else {
+ if (hashcmp(q->sha1, p->sha1))
+ die("Duplicated ref, and SHA1s don't match: %s",
+ q->name);
+ warning("Duplicated ref: %s", q->name);
+ e = q;
+ q = q->next;
+ qsize--;
+ free(e);
+ e = p;
+ p = p->next;
+ psize--;
+ }
+ }
+
+ e->next = NULL;
+
+ if (l)
+ l->next = e;
+ if (!new_list)
+ new_list = e;
+ l = e;
+ }
+
+ p = q;
+ };
+
+ k = k * 2;
+ } while ((last_merge_count != merge_count) || (last_merge_count != 1));
+
+ return new_list;
}
/*
!get_sha1_hex(refline + 1, sha1))
hashcpy(last->peeled, sha1);
}
- cached_refs->packed = list;
+ cached_refs->packed = sort_ref_list(list);
}
static struct ref_list *get_packed_refs(void)
free(ref);
closedir(dir);
}
- return list;
+ return sort_ref_list(list);
}
static struct ref_list *get_loose_refs(void)
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
+#define MAXREFLEN (1024)
+
+static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
+{
+ FILE *f;
+ struct cached_refs refs;
+ struct ref_list *ref;
+ int retval;
+
+ strcpy(name + pathlen, "packed-refs");
+ f = fopen(name, "r");
+ if (!f)
+ return -1;
+ read_packed_refs(f, &refs);
+ fclose(f);
+ ref = refs.packed;
+ retval = -1;
+ while (ref) {
+ if (!strcmp(ref->name, refname)) {
+ retval = 0;
+ memcpy(result, ref->sha1, 20);
+ break;
+ }
+ ref = ref->next;
+ }
+ free_ref_list(refs.packed);
+ return retval;
+}
+
+static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion)
+{
+ int fd, len = strlen(refname);
+ char buffer[128], *p;
+
+ if (recursion > MAXDEPTH || len > MAXREFLEN)
+ return -1;
+ memcpy(name + pathlen, refname, len+1);
+ fd = open(name, O_RDONLY);
+ if (fd < 0)
+ return resolve_gitlink_packed_ref(name, pathlen, refname, result);
+
+ len = read(fd, buffer, sizeof(buffer)-1);
+ close(fd);
+ if (len < 0)
+ return -1;
+ while (len && isspace(buffer[len-1]))
+ len--;
+ buffer[len] = 0;
+
+ /* Was it a detached head or an old-fashioned symlink? */
+ if (!get_sha1_hex(buffer, result))
+ return 0;
+
+ /* Symref? */
+ if (strncmp(buffer, "ref:", 4))
+ return -1;
+ p = buffer + 4;
+ while (isspace(*p))
+ p++;
+
+ return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1);
+}
+
+int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
+{
+ int len = strlen(path), retval;
+ char *gitdir;
+
+ while (len && path[len-1] == '/')
+ len--;
+ if (!len)
+ return -1;
+ gitdir = xmalloc(len + MAXREFLEN + 8);
+ memcpy(gitdir, path, len);
+ memcpy(gitdir + len, "/.git/", 7);
+
+ retval = resolve_gitlink_ref_recursive(gitdir, len+6, refname, result, 0);
+ free(gitdir);
+ return retval;
+}
const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
{
projects / thirdparty / git.git / blobdiff