From 10744ada73badac1762b5f2b388b3215f61b8727 Mon Sep 17 00:00:00 2001
From: Tomas Guisasola <tomasguisasola@gmail.com>
Date: Fri, 16 Aug 2013 19:46:51 -0300
Subject: [PATCH] Defining luaL_newmetatable() for Lua 5.0 code.

---
 src/luasql.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/luasql.c b/src/luasql.c
index b518c74..abadd9f 100644
--- a/src/luasql.c
+++ b/src/luasql.c
@@ -80,6 +80,23 @@ void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
 }
 #endif
 
+#if !defined(LUA_VERSION_NUM)
+/*
+** Adapted from Lua 5.2.0
+*/
+LUALIB_API int luaL_newmetatable (lua_State *L, const char *tname) {
+	luaL_getmetatable(L, tname);  /* try to get metatable */
+	if (!lua_isnil(L, -1))  /* name already in use? */
+		return 0;  /* leave previous value on top, but return 0 */
+	lua_pop(L, 1);
+	lua_newtable(L);  /* create metatable */
+	lua_pushstring(L, tname);
+	lua_pushvalue(L, -1);
+	lua_settable(L, LUA_REGISTRYINDEX);
+	return 1;
+}
+#endif
+
 /*
 ** Create a metatable and leave it on top of the stack.
 */