diff options
Diffstat (limited to 'lua/llimits.h')
| -rw-r--r-- | lua/llimits.h | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/lua/llimits.h b/lua/llimits.h index 48dc81f..fc9de1a 100644 --- a/lua/llimits.h +++ b/lua/llimits.h @@ -1,5 +1,5 @@ /* -** $Id: llimits.h,v 1.95 2011/12/06 16:58:36 roberto Exp $ +** $Id: llimits.h,v 1.99 2012/05/28 20:32:28 roberto Exp $ ** Limits, basic types, and some other `installation-dependent' definitions ** See Copyright Notice in lua.h */ @@ -31,6 +31,8 @@ typedef unsigned char lu_byte; #define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2) +#define MAX_LMEM ((l_mem) ((MAX_LUMEM >> 1) - 2)) + #define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */ @@ -209,31 +211,36 @@ typedef lu_int32 Instruction; #elif defined(LUA_IEEE754TRICK) /* }{ */ /* the next trick should work on any machine using IEEE754 with - a 32-bit integer type */ + a 32-bit int type */ union luai_Cast { double l_d; LUA_INT32 l_p[2]; }; #if !defined(LUA_IEEEENDIAN) /* { */ #define LUAI_EXTRAIEEE \ static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)}; -#define LUA_IEEEENDIAN (ieeeendian.l_p[1] == 33) +#define LUA_IEEEENDIANLOC (ieeeendian.l_p[1] == 33) #else +#define LUA_IEEEENDIANLOC LUA_IEEEENDIAN #define LUAI_EXTRAIEEE /* empty */ #endif /* } */ #define lua_number2int32(i,n,t) \ { LUAI_EXTRAIEEE \ volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \ - (i) = (t)u.l_p[LUA_IEEEENDIAN]; } + (i) = (t)u.l_p[LUA_IEEEENDIANLOC]; } #define luai_hashnum(i,n) \ { volatile union luai_Cast u; u.l_d = (n) + 1.0; /* avoid -0 */ \ (i) = u.l_p[0]; (i) += u.l_p[1]; } /* add double bits for his hash */ #define lua_number2int(i,n) lua_number2int32(i, n, int) -#define lua_number2integer(i,n) lua_number2int32(i, n, lua_Integer) #define lua_number2unsigned(i,n) lua_number2int32(i, n, lua_Unsigned) +/* the trick can be expanded to lua_Integer when it is a 32-bit value */ +#if defined(LUA_IEEELL) +#define lua_number2integer(i,n) lua_number2int32(i, n, lua_Integer) +#endif + #endif /* } */ |