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diff --git a/tag.c b/tag.c
index 26494ca9695fdd2e81952378f64bbc361698117d..b1ab75ff0164b0090f43ba55d2a70239ca2fdb7a 100644 (file)
--- a/tag.c
+++ b/tag.c
@@ -3,7 +3,14 @@
 
 const char *tag_type = "tag";
 
-struct tag *lookup_tag(unsigned char *sha1)
+struct object *deref_tag(struct object *o)
+{
+       while (o && o->type == tag_type)
+               o = parse_object(((struct tag *)o)->tagged->sha1);
+       return o;
+}
+
+struct tag *lookup_tag(const unsigned char *sha1)
 {
         struct object *obj = lookup_object(sha1);
         if (!obj) {
@@ -28,6 +35,7 @@ int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
        int typelen, taglen;
        unsigned char object[20];
        const char *type_line, *tag_line, *sig_line;
+       char type[20];
 
         if (item->object.parsed)
                 return 0;
@@ -38,10 +46,6 @@ int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
        if (memcmp("object ", data, 7) || get_sha1_hex(data + 7, object))
                return -1;
 
-       item->tagged = parse_object(object);
-       if (item->tagged)
-               add_ref(&item->object, item->tagged);
-
        type_line = data + 48;
        if (memcmp("\ntype ", type_line-1, 6))
                return -1;
@@ -58,11 +62,17 @@ int parse_tag_buffer(struct tag *item, void *data, unsigned long size)
        typelen = tag_line - type_line - strlen("type \n");
        if (typelen >= 20)
                return -1;
+       memcpy(type, type_line + 5, typelen);
+       type[typelen] = '\0';
        taglen = sig_line - tag_line - strlen("tag \n");
        item->tag = xmalloc(taglen + 1);
        memcpy(item->tag, tag_line + 4, taglen);
        item->tag[taglen] = '\0';
 
+       item->tagged = lookup_object_type(object, type);
+       if (item->tagged)
+               add_ref(&item->object, item->tagged);
+
        return 0;
 }