die("invalid object type \"%s\"", str);
}
+/*
+ * Return a numerical hash value between 0 and n-1 for the object with
+ * the specified sha1. n must be a power of 2. Please note that the
+ * return value is *not* consistent across computer architectures.
+ */
static unsigned int hash_obj(const unsigned char *sha1, unsigned int n)
{
unsigned int hash;
+
+ /*
+ * Since the sha1 is essentially random, we just take the
+ * required number of bits directly from the first
+ * sizeof(unsigned int) bytes of sha1. First we have to copy
+ * the bytes into a properly aligned integer. If we cared
+ * about getting consistent results across architectures, we
+ * would have to call ntohl() here, too.
+ */
memcpy(&hash, sha1, sizeof(unsigned int));
- /* Assumes power-of-2 hash sizes in grow_object_hash */
return hash & (n - 1);
}
+/*
+ * Insert obj into the hash table hash, which has length size (which
+ * must be a power of 2). On collisions, simply overflow to the next
+ * empty bucket.
+ */
static void insert_obj_hash(struct object *obj, struct object **hash, unsigned int size)
{
unsigned int j = hash_obj(obj->sha1, size);
hash[j] = obj;
}
+/*
+ * Look up the record for the given sha1 in the hash map stored in
+ * obj_hash. Return NULL if it was not found.
+ */
struct object *lookup_object(const unsigned char *sha1)
{
unsigned int i, first;
return obj;
}
+/*
+ * Increase the size of the hash map stored in obj_hash to the next
+ * power of 2 (but at least 32). Copy the existing values to the new
+ * hash map.
+ */
static void grow_object_hash(void)
{
int i;
obj_hash_size = new_hash_size;
}
-void *create_object(const unsigned char *sha1, int type, void *o)
+void *create_object(const unsigned char *sha1, void *o)
{
struct object *obj = o;
obj->parsed = 0;
obj->used = 0;
- obj->type = type;
obj->flags = 0;
hashcpy(obj->sha1, sha1);
return obj;
}
+void *object_as_type(struct object *obj, enum object_type type, int quiet)
+{
+ if (obj->type == type)
+ return obj;
+ else if (obj->type == OBJ_NONE) {
+ if (type == OBJ_COMMIT)
+ ((struct commit *)obj)->index = alloc_commit_index();
+ obj->type = type;
+ return obj;
+ }
+ else {
+ if (!quiet)
+ error("object %s is a %s, not a %s",
+ sha1_to_hex(obj->sha1),
+ typename(obj->type), typename(type));
+ return NULL;
+ }
+}
+
struct object *lookup_unknown_object(const unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (!obj)
- obj = create_object(sha1, OBJ_NONE, alloc_object_node());
+ obj = create_object(sha1, alloc_object_node());
return obj;
}
if (commit) {
if (parse_commit_buffer(commit, buffer, size))
return NULL;
- if (!commit->buffer) {
- commit->buffer = buffer;
+ if (!get_cached_commit_buffer(commit, NULL)) {
+ set_commit_buffer(commit, buffer, size);
*eaten_p = 1;
}
obj = &commit->object;
warning("object %s has unknown type id %d", sha1_to_hex(sha1), type);
obj = NULL;
}
- if (obj && obj->type == OBJ_NONE)
- obj->type = type;
return obj;
}
return 0;
}
-void add_object_array(struct object *obj, const char *name, struct object_array *array)
-{
- add_object_array_with_mode(obj, name, array, S_IFINVALID);
-}
-
/*
* A zero-length string to which object_array_entry::name can be
* initialized without requiring a malloc/free.
*/
static char object_array_slopbuf[1];
-void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode)
+static void add_object_array_with_mode_context(struct object *obj, const char *name,
+ struct object_array *array,
+ unsigned mode,
+ struct object_context *context)
{
unsigned nr = array->nr;
unsigned alloc = array->alloc;
else
entry->name = xstrdup(name);
entry->mode = mode;
+ entry->context = context;
array->nr = ++nr;
}
+void add_object_array(struct object *obj, const char *name, struct object_array *array)
+{
+ add_object_array_with_mode(obj, name, array, S_IFINVALID);
+}
+
+void add_object_array_with_mode(struct object *obj, const char *name, struct object_array *array, unsigned mode)
+{
+ add_object_array_with_mode_context(obj, name, array, mode, NULL);
+}
+
+void add_object_array_with_context(struct object *obj, const char *name, struct object_array *array, struct object_context *context)
+{
+ if (context)
+ add_object_array_with_mode_context(obj, name, array, context->mode, context);
+ else
+ add_object_array_with_mode_context(obj, name, array, S_IFINVALID, context);
+}
+
void object_array_filter(struct object_array *array,
object_array_each_func_t want, void *cb_data)
{