t8001/t8002: blame: demonstrate acceptance of bogus -LX,+0 and -LX,-0

diff --git a/object.c b/object.c
index 243d694a58334cc45df6f38878d094ed419188ce..d8a4b1ffbe68d6e9f720e979168f9d010c9c5a06 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;
 }
 
@@ -135,7 +145,7 @@ struct object *lookup_unknown_object(const unsigned char *sha1)
 struct object *parse_object_buffer(const unsigned char *sha1, enum object_type type, unsigned long size, void *buffer, int *eaten_p)
 {
        struct object *obj;
-       int eaten = 0;
+       *eaten_p = 0;
 
        obj = NULL;
        if (type == OBJ_BLOB) {
@@ -154,7 +164,7 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
                        if (!tree->object.parsed) {
                                if (parse_tree_buffer(tree, buffer, size))
                                        return NULL;
-                               eaten = 1;
+                               *eaten_p = 1;
                        }
                }
        } else if (type == OBJ_COMMIT) {
@@ -164,7 +174,7 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
                                return NULL;
                        if (!commit->buffer) {
                                commit->buffer = buffer;
-                               eaten = 1;
+                               *eaten_p = 1;
                        }
                        obj = &commit->object;
                }
@@ -181,7 +191,6 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
        }
        if (obj && obj->type == OBJ_NONE)
                obj->type = type;
-       *eaten_p = eaten;
        return obj;
 }