+/* Enlarge the search path buffer so that it can store at least need bytes. */
+static int expand_search_path(size_t need)
+{
+ size_t want = search_path_sz;
+ if (want == 0) want = 1;
+
+ while (want < need)
+ want *= 2;
+
+ if (want > search_path_sz) {
+ char *new = realloc(search_path, want);
+ if (!new) {
+ return -1;
+ }
+
+ search_path = new;
+ search_path_sz = want;
+ }
+
+ return 0;
+}
+
+const char *u_pkg_vfs_get_search_path(void)
+{
+ return search_path ? search_path : "";
+}
+
+int u_pkg_vfs_set_search_path(const char *path)
+{
+ if (expand_search_path(strlen(path)+1) != 0)
+ return -1;
+ strcpy(search_path, path);
+ return 0;
+}
+
+int u_pkg_vfs_add_search_dir(const char *path)
+{
+ size_t end = search_path ? strlen(search_path) : 0;
+
+ if (end == 0) {
+ return u_pkg_vfs_set_search_path(path);
+ }
+
+ if (expand_search_path(end + strlen(path) + 2) != 0)
+ return -1;
+ search_path[end] = LT_PATHSEP_CHAR;
+ strcpy(search_path+end+1, path);
+ return 0;
+}
+