Adds object_list_append() and a function to get the struct tree from an ent.

Signed-off-by: Daniel Barkalow <[EMAIL PROTECTED]>
---

 object.c |   11 +++++++++++
 object.h |    3 +++
 tree.c   |   19 +++++++++++++++++++
 tree.h   |    3 +++
 4 files changed, 36 insertions(+), 0 deletions(-)

49d33c385aa69d17c991300f73e77c6718a2b4a6
diff --git a/object.c b/object.c
--- a/object.c
+++ b/object.c
@@ -184,6 +184,17 @@ struct object_list *object_list_insert(s
         return new_list;
 }

+void object_list_append(struct object *item,
+                       struct object_list **list_p)
+{
+       while (*list_p) {
+               list_p = &((*list_p)->next);
+       }
+       *list_p = xmalloc(sizeof(struct object_list));
+       (*list_p)->next = NULL;
+       (*list_p)->item = item;
+}
+
 unsigned object_list_length(struct object_list *list)
 {
        unsigned ret = 0;
diff --git a/object.h b/object.h
--- a/object.h
+++ b/object.h
@@ -41,6 +41,9 @@ void mark_reachable(struct object *obj,
 struct object_list *object_list_insert(struct object *item,
                                       struct object_list **list_p);

+void object_list_append(struct object *item,
+                       struct object_list **list_p);
+
 unsigned object_list_length(struct object_list *list);

 int object_list_contains(struct object_list *list, struct object *obj);
diff --git a/tree.c b/tree.c
--- a/tree.c
+++ b/tree.c
@@ -1,5 +1,7 @@
 #include "tree.h"
 #include "blob.h"
+#include "commit.h"
+#include "tag.h"
 #include "cache.h"
 #include <stdlib.h>

@@ -212,3 +214,20 @@ int parse_tree(struct tree *item)
        free(buffer);
        return ret;
 }
+
+struct tree *parse_tree_indirect(const unsigned char *sha1)
+{
+       struct object *obj = parse_object(sha1);
+       do {
+               if (!obj)
+                       return NULL;
+               if (obj->type == tree_type)
+                       return (struct tree *) obj;
+               else if (obj->type == commit_type)
+                       return ((struct commit *) obj)->tree;
+               else if (obj->type == tag_type)
+                       obj = ((struct tag *) obj)->tagged;
+               else
+                       return NULL;
+       } while (1);
+}
diff --git a/tree.h b/tree.h
--- a/tree.h
+++ b/tree.h
@@ -32,4 +32,7 @@ int parse_tree_buffer(struct tree *item,

 int parse_tree(struct tree *tree);

+/* Parses and returns the tree in the given ent, chasing tags and commits. */
+struct tree *parse_tree_indirect(const unsigned char *sha1);
+
 #endif /* TREE_H */

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