new constant 'MAX_SIZE', distinct from 'MAX_SIZET', for sizes visible

from Lua; these must fit in a lua_Integer

1 files changed, 7 insertions, 1 deletions

diff --git a/llimits.h b/llimits.h
index 86af8cfb..4463e0c0 100644
--- a/llimits.h
+++ b/llimits.h
@@ -1,5 +1,5 @@
 /*
-** $Id: llimits.h,v 1.106 2013/05/27 12:43:37 roberto Exp roberto $
+** $Id: llimits.h,v 1.107 2013/05/29 14:04:15 roberto Exp roberto $
 ** Limits, basic types, and some other `installation-dependent' definitions
 ** See Copyright Notice in lua.h
 */
@@ -27,8 +27,14 @@ typedef LUAI_MEM l_mem;
 typedef unsigned char lu_byte;
 
 
+/* maximum value for size_t */
 #define MAX_SIZET       ((size_t)(~(size_t)0)-2)
 
+/* maximum size visible for Lua (must be representable in a lua_Integer */
+#define MAX_SIZE        (sizeof(size_t) <= sizeof(lua_Integer) ? MAX_SIZET \
+                          : (size_t)(~(lua_Unsigned)0)-2)
+
+
 #define MAX_LUMEM       ((lu_mem)(~(lu_mem)0)-2)
 
 #define MAX_LMEM        ((l_mem) ((MAX_LUMEM >> 1) - 2))