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correct definition for 'MAX_SIZE' (using singed integers as the limit, 

not unsigned ones) + new type 'l_uacInt'
This commit is contained in:
Roberto Ierusalimschy 2014-04-11 16:56:04 -03:00
parent d99ffa920d
commit bf06e22b6a
1 changed files with 9 additions and 8 deletions
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17
llimits.h
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@ -1,5 +1,5 @@
/* /*
** $Id: llimits.h,v 1.111 2014/03/07 16:19:00 roberto Exp roberto $ ** $Id: llimits.h,v 1.112 2014/04/11 19:02:16 roberto Exp roberto $
** Limits, basic types, and some other `installation-dependent' definitions ** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h ** See Copyright Notice in lua.h
*/ */
@ -27,12 +27,16 @@ typedef LUAI_MEM l_mem;
typedef unsigned char lu_byte; typedef unsigned char lu_byte;
/* maximum value for a lua_Unsigned */
#define MAX_UINTEGER (((lua_Unsigned)LUA_MAXINTEGER << 1) + 1u)
/* maximum value for size_t */ /* maximum value for size_t */
#define MAX_SIZET ((size_t)(~(size_t)0)-2) #define MAX_SIZET ((size_t)(~(size_t)0)-2)
/* maximum size visible for Lua (must be representable in a lua_Integer */ /* maximum size visible for Lua (must be representable in a lua_Integer */
#define MAX_SIZE (sizeof(size_t) <= sizeof(lua_Integer) ? MAX_SIZET \ #define MAX_SIZE (sizeof(size_t) < sizeof(lua_Integer) ? MAX_SIZET \
: (size_t)(~(lua_Unsigned)0)-2) : (size_t)(LUA_MAXINTEGER)-2)
#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2) #define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
@ -43,10 +47,6 @@ typedef unsigned char lu_byte;
#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
/* maximum value for a lua_Unsigned */
#define MAX_UINTEGER (((lua_Unsigned)LUA_MAXINTEGER << 1) + 1u)
/* /*
** conversion of pointer to integer ** conversion of pointer to integer
** this is for hashing only; there is no problem if the integer ** this is for hashing only; there is no problem if the integer
@ -64,8 +64,9 @@ typedef unsigned char lu_byte;
typedef LUAI_USER_ALIGNMENT_T L_Umaxalign; typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
/* result of a `usual argument conversion' over lua_Number */ /* types of 'usual argument conversions' for lua_Number and lua_Integer */
typedef LUAI_UACNUMBER l_uacNumber; typedef LUAI_UACNUMBER l_uacNumber;
typedef LUAI_UACINT l_uacInt;
/* internal assertions for in-house debugging */ /* internal assertions for in-house debugging */