apply: allow-binary-replacement.

diff --git a/object.c b/object.c
index 1fdebe012ba8a6db0b6eae443e40a7f74ae2d597..427e14cae2deb42138a439f7b2d69d3e06bb9417 100644 (file)
--- a/object.c
+++ b/object.c
@@ -67,40 +67,66 @@ void created_object(const unsigned char *sha1, struct object *obj)
        nr_objs++;
 }
 
-void add_ref(struct object *refer, struct object *target)
+struct object_refs *alloc_object_refs(unsigned count)
 {
-       struct object_list **pp, *p;
+       struct object_refs *refs;
+       size_t size = sizeof(*refs) + count*sizeof(struct object *);
 
-       if (!track_object_refs)
+       refs = xmalloc(size);
+       memset(refs, 0, size);
+       refs->count = count;
+       return refs;
+}
+
+static int compare_object_pointers(const void *a, const void *b)
+{
+       const struct object * const *pa = a;
+       const struct object * const *pb = b;
+       return *pa - *pb;
+}
+
+void set_object_refs(struct object *obj, struct object_refs *refs)
+{
+       unsigned int i, j;
+
+       /* Do not install empty list of references */
+       if (refs->count < 1) {
+               free(refs);
                return;
+       }
 
-       pp = &refer->refs;
-       while ((p = *pp) != NULL) {
-               if (p->item == target)
-                       return;
-               pp = &p->next;
+       /* Sort the list and filter out duplicates */
+       qsort(refs->ref, refs->count, sizeof(refs->ref[0]),
+             compare_object_pointers);
+       for (i = j = 1; i < refs->count; i++) {
+               if (refs->ref[i] != refs->ref[i - 1])
+                       refs->ref[j++] = refs->ref[i];
+       }
+       if (j < refs->count) {
+               /* Duplicates were found - reallocate list */
+               size_t size = sizeof(*refs) + j*sizeof(struct object *);
+               refs->count = j;
+               refs = xrealloc(refs, size);
        }
 
-       target->used = 1;
-       p = xmalloc(sizeof(*p));
-       p->item = target;
-       p->next = NULL;
-       *pp = p;
+       for (i = 0; i < refs->count; i++)
+               refs->ref[i]->used = 1;
+       obj->refs = refs;
 }
 
 void mark_reachable(struct object *obj, unsigned int mask)
 {
-       struct object_list *p = obj->refs;
-
        if (!track_object_refs)
                die("cannot do reachability with object refs turned off");
        /* If we've been here already, don't bother */
        if (obj->flags & mask)
                return;
        obj->flags |= mask;
-       while (p) {
-               mark_reachable(p->item, mask);
-               p = p->next;
+       if (obj->refs) {
+               const struct object_refs *refs = obj->refs;
+               unsigned i;
+               for (i = 0; i < refs->count; i++)
+                       mark_reachable(refs->ref[i], mask);
        }
 }