From a2fa48a570b01b2a2cd37f01799f08f693fc5892 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 6 Aug 2002 12:32:22 -0300
Subject: new (old?) error handling scheme

---
 lbaselib.c | 22 +++++-----------------
 1 file changed, 5 insertions(+), 17 deletions(-)

(limited to 'lbaselib.c')

diff --git a/lbaselib.c b/lbaselib.c
index 8ff09683..b05a1b15 100644
--- a/lbaselib.c
+++ b/lbaselib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbaselib.c,v 1.91 2002/07/17 16:25:13 roberto Exp roberto $
+** $Id: lbaselib.c,v 1.92 2002/08/05 14:46:02 roberto Exp roberto $
 ** Basic library
 ** See Copyright Notice in lua.h
 */
@@ -276,9 +276,7 @@ static int luaB_unpack (lua_State *L) {
 static int luaB_pcall (lua_State *L) {
   int status;
   luaL_check_any(L, 1);
-  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET);
-  if (status)  /* error? */
-    lua_pcallreset(L);  /* reset error handler */
+  status = lua_pcall(L, lua_gettop(L) - 1, LUA_MULTRET, 0);
   lua_pushboolean(L, (status == 0));
   lua_insert(L, 1);
   return lua_gettop(L);  /* return status + all results */
@@ -287,22 +285,12 @@ static int luaB_pcall (lua_State *L) {
 
 static int luaB_xpcall (lua_State *L) {
   int status;
-  int ref;
   luaL_check_any(L, 2);
   lua_settop(L, 2);
-  ref = lua_ref(L, 1);  /* save error function */
-  status = lua_pcall(L, 0, LUA_MULTRET);
-  if (status) {  /* error? */
-    if (status == LUA_ERRRUN) { /* run-time error? */
-      lua_getref(L, ref);  /* get error function */
-      lua_pushvalue(L, -2);  /* error message */
-      lua_call(L, 1, 1);  /* call error function */
-    }
-    lua_pcallreset(L);  /* reset error handler */
-  }
-  lua_unref(L, ref);  /* free reference */
+  lua_insert(L, 1);  /* put error function under function to be called */
+  status = lua_pcall(L, 0, LUA_MULTRET, 1);
   lua_pushboolean(L, (status == 0));
-  lua_insert(L, 1);
+  lua_replace(L, 1);
   return lua_gettop(L);  /* return status + all results */
 }
 
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