From c6b64ffe65549b179bfa565e8329430857e335ee Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 25 Oct 2010 18:31:11 -0200
Subject: new type lua_Unsigned and corresponding projection/injection
 functions

---
 lbitlib.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

(limited to 'lbitlib.c')

diff --git a/lbitlib.c b/lbitlib.c
index 3bebccd5..7d7de63c 100644
--- a/lbitlib.c
+++ b/lbitlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lbitlib.c,v 1.6 2010/07/02 12:01:53 roberto Exp roberto $
+** $Id: lbitlib.c,v 1.7 2010/10/25 14:32:36 roberto Exp roberto $
 ** Standard library for bitwise operations
 ** See Copyright Notice in lua.h
 */
@@ -21,14 +21,7 @@ typedef LUA_INT32 b_int;
 typedef unsigned LUA_INT32 b_uint;
 
 
-static b_uint getuintarg (lua_State *L, int arg) {
-  b_uint r;
-  int isnum;
-  lua_Number x = lua_tonumberx(L, arg, &isnum);
-  if (!isnum) luaL_typeerror(L, arg, "number");
-  lua_number2uint(r, x);
-  return r;
-}
+#define getuintarg(L,arg)	luaL_checkunsigned(L,arg)
 
 
 static b_uint andaux (lua_State *L) {
@@ -42,7 +35,7 @@ static b_uint andaux (lua_State *L) {
 
 static int b_and (lua_State *L) {
   b_uint r = andaux(L);
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
@@ -59,7 +52,7 @@ static int b_or (lua_State *L) {
   b_uint r = 0;
   for (i = 1; i <= n; i++)
     r |= getuintarg(L, i);
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
@@ -69,14 +62,14 @@ static int b_xor (lua_State *L) {
   b_uint r = 0;
   for (i = 1; i <= n; i++)
     r ^= getuintarg(L, i);
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
 
 static int b_not (lua_State *L) {
   b_uint r = ~getuintarg(L, 1);
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
@@ -91,7 +84,7 @@ static int b_shift (lua_State *L, b_uint r, int i) {
     if (i >= NBITS) r = 0;
     else r <<= i;
   }
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
@@ -115,7 +108,7 @@ static int b_arshift (lua_State *L) {
     if (i >= NBITS) r = 0xffffffff;
     else
       r = (r >> i) | ~(~(b_uint)0 >> i);  /* add signal bit */
-    lua_pushnumber(L, lua_uint2number(r));
+    lua_pushunsigned(L, r);
     return 1;
   }
 }
@@ -125,7 +118,7 @@ static int b_rot (lua_State *L, int i) {
   b_uint r = getuintarg(L, 1);
   i &= (NBITS - 1);  /* i = i % NBITS */
   r = (r << i) | (r >> (NBITS - i));
-  lua_pushnumber(L, lua_uint2number(r));
+  lua_pushunsigned(L, r);
   return 1;
 }
 
-- 
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