1 files changed, 34 insertions, 1 deletions

diff --git a/ldblib.c b/ldblib.c
index 0e761aee..9da5e49f 100644
--- a/ldblib.c
+++ b/ldblib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: ldblib.c,v 1.132 2012/01/19 20:14:44 roberto Exp roberto $
+** $Id: ldblib.c,v 1.133 2013/06/25 19:37:00 roberto Exp roberto $
 ** Interface from Lua to its debug API
 ** See Copyright Notice in lua.h
 */
@@ -34,6 +34,38 @@ static int db_numbits (lua_State *L) {
 }
 
 
+static int db_subtype (lua_State *L) {
+  int tp = lua_type(L, 1);
+  switch (tp) {
+    case LUA_TNONE:
+      luaL_checkany(L, 1);
+      break;
+    case LUA_TNUMBER:
+      if (lua_isinteger(L, 1))
+        lua_pushliteral(L, "integer"); 
+      else
+        lua_pushliteral(L, "float"); 
+      break;
+    case LUA_TFUNCTION:
+      if (lua_iscfunction(L, 1))
+        lua_pushliteral(L, "Cfunction"); 
+      else
+        lua_pushliteral(L, "Luafunction"); 
+      break;
+    case LUA_TUSERDATA:
+      if (lua_islightuserdata(L, 1))
+        lua_pushliteral(L, "lightudata"); 
+      else
+        lua_pushliteral(L, "fulludata"); 
+      break;
+    default:
+      lua_pushstring(L, lua_typename(L, tp));
+      break;
+  }
+  return 1;
+}
+
+
 static int db_getregistry (lua_State *L) {
   lua_pushvalue(L, LUA_REGISTRYINDEX);
   return 1;
@@ -399,6 +431,7 @@ static const luaL_Reg dblib[] = {
   {"setlocal", db_setlocal},
   {"setmetatable", db_setmetatable},
   {"setupvalue", db_setupvalue},
+  {"subtype", db_subtype},
   {"traceback", db_traceback},
   {NULL, NULL}
 };