lua

commit 38d3bc89093010fa9c460b61a1965d9077b5378f
parent 75efc6722bf3bf31adffed44407674f74ac6caed
Author: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date:   Sun, 25 Feb 2018 10:39:33 -0300

using 'offsetof' to compute the size of parts of a structure

Diffstat:
M
lfunc.h
 | 
10
+++++-----

1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/lfunc.h b/lfunc.h
@@ -1,5 +1,5 @@
 /*
-** $Id: lfunc.h,v 2.18 2017/06/29 15:06:44 roberto Exp roberto $
+** $Id: lfunc.h,v 2.19 2018/01/28 15:13:26 roberto Exp roberto $
 ** Auxiliary functions to manipulate prototypes and closures
 ** See Copyright Notice in lua.h
 */
@@ -11,11 +11,11 @@
 #include "lobject.h"
 
 
-#define sizeCclosure(n)	(cast_int(sizeof(CClosure)) + \
-                         cast_int(sizeof(TValue)*((n)-1)))
+#define sizeCclosure(n)	(cast_int(offsetof(CClosure, upvalue)) + \
+                         cast_int(sizeof(TValue)) * (n))
 
-#define sizeLclosure(n)	(cast_int(sizeof(LClosure)) + \
-                         cast_int(sizeof(TValue *)*((n)-1)))
+#define sizeLclosure(n)	(cast_int(offsetof(LClosure, upvals)) + \
+                         cast_int(sizeof(TValue *)) * (n))
 
 
 /* test whether thread is in 'twups' list */