git-tar-tree: no more void pointer arithmetic

[git.git] / cache-tree.c

diff --git a/cache-tree.c b/cache-tree.c
index e452238..d9f7e1e 100644 (file)
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -110,6 +110,10 @@ void cache_tree_invalidate_path(struct cache_tree *it, const char *path)
        int namelen;
        struct cache_tree_sub *down;
 
+#if DEBUG
+       fprintf(stderr, "cache-tree invalidate <%s>\n", path);
+#endif
+
        if (!it)
                return;
        slash = strchr(path, '/');
@@ -335,7 +339,7 @@ static int update_one(struct cache_tree *it,
                offset += 20;
 
 #if DEBUG
-               fprintf(stderr, "cache-tree %o %.*s\n",
+               fprintf(stderr, "cache-tree update-one %o %.*s\n",
                        mode, entlen, path + baselen);
 #endif
        }
@@ -351,7 +355,7 @@ static int update_one(struct cache_tree *it,
        free(buffer);
        it->entry_count = i;
 #if DEBUG
-       fprintf(stderr, "cache-tree (%d ent, %d subtree) %s\n",
+       fprintf(stderr, "cache-tree update-one (%d ent, %d subtree) %s\n",
                it->entry_count, it->subtree_nr,
                sha1_to_hex(it->sha1));
 #endif
@@ -525,3 +529,29 @@ struct cache_tree *cache_tree_read(const char *buffer, unsigned long size)
                return NULL; /* not the whole tree */
        return read_one(&buffer, &size);
 }
+
+struct cache_tree *cache_tree_find(struct cache_tree *it, const char *path)
+{
+       while (*path) {
+               const char *slash;
+               struct cache_tree_sub *sub;
+
+               slash = strchr(path, '/');
+               if (!slash)
+                       slash = path + strlen(path);
+               /* between path and slash is the name of the
+                * subtree to look for.
+                */
+               sub = find_subtree(it, path, slash - path, 0);
+               if (!sub)
+                       return NULL;
+               it = sub->cache_tree;
+               if (slash)
+                       while (*slash && *slash == '/')
+                               slash++;
+               if (!slash || !*slash)
+                       return it; /* prefix ended with slashes */
+               path = slash;
+       }
+       return it;
+}