1 files changed, 8 insertions, 5 deletions

diff --git a/lauxlib.c b/lauxlib.c
index 0c64f9e5..b8205191 100644
--- a/lauxlib.c
+++ b/lauxlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lauxlib.c,v 1.132 2005/05/16 21:19:00 roberto Exp roberto $
+** $Id: lauxlib.c,v 1.133 2005/05/17 19:49:15 roberto Exp roberto $
 ** Auxiliary functions for building Lua libraries
 ** See Copyright Notice in lua.h
 */
@@ -95,12 +95,15 @@ LUALIB_API int luaL_error (lua_State *L, const char *fmt, ...) {
 /* }====================================================== */
 
 
-LUALIB_API int luaL_findstring (const char *name, const char *const list[]) {
+LUALIB_API int luaL_checkoption (lua_State *L, int narg, const char *def,
+                                 const char *const lst[]) {
+  const char *name = (def) ? luaL_optstring(L, narg, def) :
+                             luaL_checkstring(L, narg);
   int i;
-  for (i=0; list[i]; i++)
-    if (strcmp(list[i], name) == 0)
+  for (i=0; lst[i]; i++)
+    if (strcmp(lst[i], name) == 0)
       return i;
-  return -1;  /* name not found */
+  return luaL_error(L, "invalid option " LUA_QS, name);
 }