mirror of
https://github.com/lua/lua
synced 2024-11-26 14:51:21 +03:00
code for conversion macros moved from luaconf to llimits + 'uint'
renamed to 'unsigned' in those macros
This commit is contained in:
Roberto Ierusalimschy
parent
fdd5f2f7a3
commit
f1629217f1
6
lapi.c
6
lapi.c
@ -1,5 +1,5 @@
|
||||
/*
|
||||
** $Id: lapi.c,v 2.138 2010/10/25 19:01:37 roberto Exp roberto $
|
||||
** $Id: lapi.c,v 2.139 2010/10/25 20:31:11 roberto Exp roberto $
|
||||
** Lua API
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
@ -353,7 +353,7 @@ LUA_API lua_Unsigned lua_tounsignedx (lua_State *L, int idx, int *isnum) {
|
||||
if (tonumber(o, &n)) {
|
||||
lua_Unsigned res;
|
||||
lua_Number num = nvalue(o);
|
||||
lua_number2uint(res, num);
|
||||
lua_number2unsigned(res, num);
|
||||
if (isnum) *isnum = 1;
|
||||
return res;
|
||||
}
|
||||
@ -472,7 +472,7 @@ LUA_API void lua_pushinteger (lua_State *L, lua_Integer n) {
|
||||
LUA_API void lua_pushunsigned (lua_State *L, lua_Unsigned u) {
|
||||
lua_Number n;
|
||||
lua_lock(L);
|
||||
n = lua_uint2number(u);
|
||||
n = lua_unsigned2number(u);
|
||||
setnvalue(L->top, n);
|
||||
api_incr_top(L);
|
||||
lua_unlock(L);
|
||||
|
||||
91
llimits.h
91
llimits.h
@ -1,5 +1,5 @@
|
||||
/*
|
||||
** $Id: llimits.h,v 1.81 2010/05/24 19:29:46 roberto Exp roberto $
|
||||
** $Id: llimits.h,v 1.82 2010/05/31 16:08:55 roberto Exp roberto $
|
||||
** Limits, basic types, and some other `installation-dependent' definitions
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
@ -168,6 +168,95 @@ typedef lu_int32 Instruction;
|
||||
#define luai_userstateyield(L,n) ((void)L)
|
||||
#endif
|
||||
|
||||
/*
|
||||
** lua_number2int is a macro to convert lua_Number to int.
|
||||
** lua_number2integer is a macro to convert lua_Number to LUA_INTEGER.
|
||||
** lua_number2unsigned is a macro to convert a lua_Number to a LUA_UNSIGNED.
|
||||
** lua_unsigned2number is a macro to convert a LUA_UNSIGNED to a lua_Number.
|
||||
*/
|
||||
|
||||
#if defined(MS_ASMTRICK) /* { */
|
||||
/* trick with Microsoft assembler for X86 */
|
||||
|
||||
#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
|
||||
#define lua_number2integer(i,n) lua_number2int(i, n)
|
||||
#define lua_number2unsigned(i,n) \
|
||||
{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
|
||||
|
||||
|
||||
#elif defined(LUA_IEEE754TRICK) /* }{ */
|
||||
/* the next trick should work on any machine using IEEE754 with
|
||||
a 32-bit integer 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)
|
||||
#else
|
||||
#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]; }
|
||||
|
||||
#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)
|
||||
|
||||
#endif /* } */
|
||||
|
||||
|
||||
/* the following definitions always work, but may be slow */
|
||||
|
||||
#if !defined(lua_number2int)
|
||||
#define lua_number2int(i,n) ((i)=(int)(n))
|
||||
#endif
|
||||
|
||||
#if !defined(lua_number2integer)
|
||||
#define lua_number2integer(i,n) ((i)=(LUA_INTEGER)(n))
|
||||
#endif
|
||||
|
||||
#if !defined(lua_number2unsigned) /* { */
|
||||
/* the following definition assures proper modulo behavior */
|
||||
#if defined(LUA_NUMBER_DOUBLE)
|
||||
#include <math.h>
|
||||
#define lua_number2unsigned(i,n) \
|
||||
((i)=(LUA_UNSIGNED)((n) - floor((n)/4294967296.0)*4294967296.0))
|
||||
#else
|
||||
#define lua_number2unsigned(i,n) ((i)=(LUA_UNSIGNED)(n))
|
||||
#endif
|
||||
#endif /* } */
|
||||
|
||||
|
||||
#if !defined(lua_unsigned2number)
|
||||
/* on several machines, coercion from unsigned to double is slow,
|
||||
so it may be worth to avoid */
|
||||
#define lua_unsigned2number(u) \
|
||||
((LUA_INT32)(u) < 0 ? (lua_Number)(u) : (lua_Number)(LUA_INT32)(u))
|
||||
#endif
|
||||
|
||||
|
||||
/*
|
||||
** luai_hashnum is a macro do hash a lua_Number value into an integer.
|
||||
** The hash must be deterministic and give reasonable values for
|
||||
** both small and large values (outside the range of integers).
|
||||
** It is used only in ltable.c.
|
||||
*/
|
||||
|
||||
#if !defined(luai_hashnum) /* { */
|
||||
|
||||
#include <float.h>
|
||||
#include <math.h>
|
||||
|
||||
#define luai_hashnum(i,n) { int e; \
|
||||
n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
|
||||
lua_number2int(i, n); i += e; }
|
||||
|
||||
#endif /* } */
|
||||
|
||||
|
||||
|
||||
|
||||
107
luaconf.h
107
luaconf.h
@ -1,5 +1,5 @@
|
||||
/*
|
||||
** $Id: luaconf.h,v 1.147 2010/10/29 11:13:21 roberto Exp roberto $
|
||||
** $Id: luaconf.h,v 1.148 2010/10/29 17:52:46 roberto Exp roberto $
|
||||
** Configuration file for Lua
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
@ -348,27 +348,13 @@
|
||||
|
||||
|
||||
|
||||
/*
|
||||
** {==================================================================
|
||||
** CHANGE (to smaller values) the following definitions if your system
|
||||
** has a small C stack. (Or you may want to change them to larger
|
||||
** values if your system has a large C stack and these limits are
|
||||
** too rigid for you.) Some of these constants control the size of
|
||||
** stack-allocated arrays used by the compiler or the interpreter, while
|
||||
** others limit the maximum number of recursive calls that the compiler
|
||||
** or the interpreter can perform. Values too large may cause a C stack
|
||||
** overflow for some forms of deep constructs.
|
||||
** ===================================================================
|
||||
*/
|
||||
|
||||
|
||||
/*
|
||||
@@ LUAL_BUFFERSIZE is the buffer size used by the lauxlib buffer system.
|
||||
** CHANGE it if it uses too much C-stack space.
|
||||
*/
|
||||
#define LUAL_BUFFERSIZE BUFSIZ
|
||||
|
||||
/* }================================================================== */
|
||||
|
||||
|
||||
|
||||
|
||||
@ -445,32 +431,21 @@
|
||||
#define LUA_UNSIGNED unsigned LUA_INT32
|
||||
|
||||
|
||||
/*
|
||||
@@ lua_number2int is a macro to convert lua_Number to int.
|
||||
@@ lua_number2integer is a macro to convert lua_Number to LUA_INTEGER.
|
||||
@@ lua_number2uint is a macro to convert a lua_Number to a LUA_UNSIGNED.
|
||||
@@ lua_uint2number is a macro to convert a LUA_UNSIGNED to a lua_Number.
|
||||
*/
|
||||
|
||||
#if defined(LUA_CORE) /* { */
|
||||
|
||||
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) && \
|
||||
!defined(LUA_NOIEEE754TRICK) /* { */
|
||||
#if defined(LUA_NUMBER_DOUBLE) && !defined(LUA_ANSI) /* { */
|
||||
|
||||
/* On a Microsoft compiler on a Pentium, use assembler to avoid clashes
|
||||
with a DirectX idiosyncrasy */
|
||||
#if defined(_MSC_VER) && defined(M_IX86) /* { */
|
||||
|
||||
#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
|
||||
#define lua_number2integer(i,n) lua_number2int(i, n)
|
||||
#define lua_number2uint(i,n) \
|
||||
{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
|
||||
#define MS_ASMTRICK
|
||||
|
||||
#else /* }{ */
|
||||
/* the next trick should work on any machine using IEEE754 with
|
||||
a 32-bit integer type */
|
||||
/* the next definition uses a trick that should work on any machine
|
||||
using IEEE754 with a 32-bit integer type */
|
||||
|
||||
union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
|
||||
#define LUA_IEEE754TRICK
|
||||
|
||||
/*
|
||||
@@ LUA_IEEEENDIAN is the endianness of doubles in your machine
|
||||
@ -485,77 +460,11 @@ union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
|
||||
#define LUA_IEEEENDIAN 1
|
||||
#endif
|
||||
|
||||
#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)
|
||||
#else
|
||||
#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]; }
|
||||
|
||||
#define lua_number2int(i,n) lua_number2int32(i, n, int)
|
||||
#define lua_number2integer(i,n) lua_number2int32(i, n, LUA_INTEGER)
|
||||
#define lua_number2uint(i,n) lua_number2int32(i, n, LUA_UNSIGNED)
|
||||
|
||||
#endif /* } */
|
||||
|
||||
|
||||
#endif /* } */
|
||||
|
||||
|
||||
/* the following definitions always work, but may be slow */
|
||||
|
||||
#if !defined(lua_number2int)
|
||||
#define lua_number2int(i,n) ((i)=(int)(n))
|
||||
#endif
|
||||
|
||||
#if !defined(lua_number2integer)
|
||||
#define lua_number2integer(i,n) ((i)=(LUA_INTEGER)(n))
|
||||
#endif
|
||||
|
||||
#if !defined(lua_number2uint) && (defined(lapi_c) || defined(luaall_c)) /* { */
|
||||
/* the following definition assures proper modulo behavior */
|
||||
#if defined(LUA_NUMBER_DOUBLE)
|
||||
#include <math.h>
|
||||
#define lua_number2uint(i,n) \
|
||||
((i)=(LUA_UNSIGNED)((n) - floor((n)/4294967296.0)*4294967296.0))
|
||||
#else
|
||||
#define lua_number2uint(i,n) ((i)=(LUA_UNSIGNED)(n))
|
||||
#endif
|
||||
#endif /* } */
|
||||
|
||||
#if !defined(lua_uint2number)
|
||||
/* on several machines, coercion from unsigned to double is slow,
|
||||
so it may be worth to avoid */
|
||||
#define lua_uint2number(u) \
|
||||
((LUA_INT32)(u) < 0 ? (lua_Number)(u) : (lua_Number)(LUA_INT32)(u))
|
||||
#endif
|
||||
|
||||
#endif /* } */
|
||||
|
||||
|
||||
/*
|
||||
@@ luai_hashnum is a macro do hash a lua_Number value into an integer.
|
||||
@* The hash must be deterministic and give reasonable values for
|
||||
@* both small and large values (outside the range of integers).
|
||||
@* It is used only in ltable.c.
|
||||
*/
|
||||
|
||||
#if defined(ltable_c) || defined(luaall_c)
|
||||
|
||||
#include <float.h>
|
||||
#include <math.h>
|
||||
|
||||
#define luai_hashnum(i,n) { int e; \
|
||||
n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
|
||||
lua_number2int(i, n); i += e; }
|
||||
|
||||
#endif /* ltable_c */
|
||||
#endif /* } */
|
||||
|
||||
/* }================================================================== */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user