Merge branch 'jk/lookup-object-prefer-latest'

diff --git a/object.c b/object.c
index 4af3451bf89471a0ab7a148aad4924a8ac8ae053..88d0bece8116862681ba9fee3f9e0dfdec7f8b17 100644 (file)
--- a/object.c
+++ b/object.c
@@ -71,13 +71,13 @@ static unsigned int hashtable_index(const unsigned char *sha1)
 
 struct object *lookup_object(const unsigned char *sha1)
 {
-       unsigned int i;
+       unsigned int i, first;
        struct object *obj;
 
        if (!obj_hash)
                return NULL;
 
-       i = hashtable_index(sha1);
+       first = i = hashtable_index(sha1);
        while ((obj = obj_hash[i]) != NULL) {
                if (!hashcmp(sha1, obj->sha1))
                        break;
@@ -85,6 +85,16 @@ struct object *lookup_object(const unsigned char *sha1)
                if (i == obj_hash_size)
                        i = 0;
        }
+       if (obj && i != first) {
+               /*
+                * Move object to where we started to look for it so
+                * that we do not need to walk the hash table the next
+                * time we look for it.
+                */
+               struct object *tmp = obj_hash[i];
+               obj_hash[i] = obj_hash[first];
+               obj_hash[first] = tmp;
+       }
        return obj;
 }
 
@@ -185,6 +195,16 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
        return obj;
 }
 
+struct object *parse_object_or_die(const unsigned char *sha1,
+                                  const char *name)
+{
+       struct object *o = parse_object(sha1);
+       if (o)
+               return o;
+
+       die(_("unable to parse object: %s"), name ? name : sha1_to_hex(sha1));
+}
+
 struct object *parse_object(const unsigned char *sha1)
 {
        unsigned long size;