2 * decorate.c - decorate a git object with some arbitrary
9 static unsigned int hash_obj(const struct object *obj, unsigned int n)
13 memcpy(&hash, obj->sha1, sizeof(unsigned int));
17 static void *insert_decoration(struct decoration *n, const struct object *base, void *decoration)
20 struct object_decoration *hash = n->hash;
21 unsigned int j = hash_obj(base, size);
23 while (hash[j].base) {
24 if (hash[j].base == base) {
25 void *old = hash[j].decoration;
26 hash[j].decoration = decoration;
33 hash[j].decoration = decoration;
38 static void grow_decoration(struct decoration *n)
41 int old_size = n->size;
42 struct object_decoration *old_hash = n->hash;
44 n->size = (old_size + 1000) * 3 / 2;
45 n->hash = xcalloc(n->size, sizeof(struct object_decoration));
48 for (i = 0; i < old_size; i++) {
49 const struct object *base = old_hash[i].base;
50 void *decoration = old_hash[i].decoration;
54 insert_decoration(n, base, decoration);
59 /* Add a decoration pointer, return any old one */
60 void *add_decoration(struct decoration *n, const struct object *obj,
65 if (nr > n->size * 2 / 3)
67 return insert_decoration(n, obj, decoration);
70 /* Lookup a decoration pointer */
71 void *lookup_decoration(struct decoration *n, const struct object *obj)
75 /* nothing to lookup */
78 j = hash_obj(obj, n->size);
80 struct object_decoration *ref = n->hash + j;
82 return ref->decoration;