+static int read_one_entry(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
+{
+ int len;
+ unsigned int size;
+ struct cache_entry *ce;
+
+ if (S_ISDIR(mode))
+ return READ_TREE_RECURSIVE;
+
+ len = strlen(pathname);
+ size = cache_entry_size(baselen + len);
+ ce = xmalloc(size);
+
+ memset(ce, 0, size);
+
+ ce->ce_mode = create_ce_mode(mode);
+ ce->ce_flags = create_ce_flags(baselen + len, stage);
+ memcpy(ce->name, base, baselen);
+ memcpy(ce->name + baselen, pathname, len+1);
+ memcpy(ce->sha1, sha1, 20);
+ return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
+}
+
+static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths)
+{
+ const char *match;
+ int pathlen;
+
+ if (!paths)
+ return 1;
+ pathlen = strlen(path);
+ while ((match = *paths++) != NULL) {
+ int matchlen = strlen(match);
+
+ if (baselen >= matchlen) {
+ /* If it doesn't match, move along... */
+ if (strncmp(base, match, matchlen))
+ continue;
+ /* The base is a subdirectory of a path which was specified. */
+ return 1;
+ }
+
+ /* Does the base match? */
+ if (strncmp(base, match, baselen))
+ continue;
+
+ match += baselen;
+ matchlen -= baselen;
+
+ if (pathlen > matchlen)
+ continue;
+
+ if (matchlen > pathlen) {
+ if (match[pathlen] != '/')
+ continue;
+ if (!S_ISDIR(mode))
+ continue;
+ }
+
+ if (strncmp(path, match, pathlen))
+ continue;
+
+ return 1;
+ }
+ return 0;
+}
+
+int read_tree_recursive(struct tree *tree,
+ const char *base, int baselen,
+ int stage, const char **match,
+ read_tree_fn_t fn)
+{
+ struct tree_entry_list *list;
+ if (parse_tree(tree))
+ return -1;
+ list = tree->entries;
+ while (list) {
+ struct tree_entry_list *current = list;
+ list = list->next;
+ if (!match_tree_entry(base, baselen, current->name,
+ current->mode, match))
+ continue;
+
+ switch (fn(current->item.any->sha1, base, baselen,
+ current->name, current->mode, stage)) {
+ case 0:
+ continue;
+ case READ_TREE_RECURSIVE:
+ break;;
+ default:
+ return -1;
+ }
+ if (current->directory) {
+ int retval;
+ int pathlen = strlen(current->name);
+ char *newbase;
+
+ newbase = xmalloc(baselen + 1 + pathlen);
+ memcpy(newbase, base, baselen);
+ memcpy(newbase + baselen, current->name, pathlen);
+ newbase[baselen + pathlen] = '/';
+ retval = read_tree_recursive(current->item.tree,
+ newbase,
+ baselen + pathlen + 1,
+ stage, match, fn);
+ free(newbase);
+ if (retval)
+ return -1;
+ continue;
+ }
+ }
+ return 0;
+}
+
+int read_tree(struct tree *tree, int stage, const char **match)
+{
+ return read_tree_recursive(tree, "", 0, stage, match, read_one_entry);
+}
+
+struct tree *lookup_tree(const unsigned char *sha1)