mirror of
https://github.com/RT-Thread/rt-thread.git
synced 2026-08-24 19:28:30 +08:00
add lua support for rt-thead
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2399 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
xiongyihui3@gmail.com
+394
@@ -0,0 +1,394 @@
|
||||
/*
|
||||
** $Id: lmathlib.c,v 1.67.1.1 2007/12/27 13:02:25 roberto Exp $
|
||||
** Standard mathematical library
|
||||
** See Copyright Notice in lua.h
|
||||
*/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
|
||||
#define lmathlib_c
|
||||
#define LUA_LIB
|
||||
|
||||
#include "lua.h"
|
||||
|
||||
#include "lauxlib.h"
|
||||
#include "lualib.h"
|
||||
#include "lrotable.h"
|
||||
|
||||
#undef PI
|
||||
#define PI (3.14159265358979323846)
|
||||
#define RADIANS_PER_DEGREE (PI/180.0)
|
||||
|
||||
|
||||
|
||||
static int math_abs (lua_State *L) {
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
lua_Number x = luaL_checknumber(L, 1);
|
||||
if (x < 0) x = -x; //fails for -2^31
|
||||
lua_pushnumber(L, x);
|
||||
#else
|
||||
lua_pushnumber(L, fabs(luaL_checknumber(L, 1)));
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifndef LUA_NUMBER_INTEGRAL
|
||||
|
||||
static int math_sin (lua_State *L) {
|
||||
lua_pushnumber(L, sin(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_sinh (lua_State *L) {
|
||||
lua_pushnumber(L, sinh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_cos (lua_State *L) {
|
||||
lua_pushnumber(L, cos(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_cosh (lua_State *L) {
|
||||
lua_pushnumber(L, cosh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_tan (lua_State *L) {
|
||||
lua_pushnumber(L, tan(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_tanh (lua_State *L) {
|
||||
lua_pushnumber(L, tanh(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_asin (lua_State *L) {
|
||||
lua_pushnumber(L, asin(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_acos (lua_State *L) {
|
||||
lua_pushnumber(L, acos(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_atan (lua_State *L) {
|
||||
lua_pushnumber(L, atan(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_atan2 (lua_State *L) {
|
||||
lua_pushnumber(L, atan2(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_ceil (lua_State *L) {
|
||||
lua_pushnumber(L, ceil(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_floor (lua_State *L) {
|
||||
lua_pushnumber(L, floor(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_fmod (lua_State *L) {
|
||||
lua_pushnumber(L, fmod(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_modf (lua_State *L) {
|
||||
double ip;
|
||||
double fp = modf(luaL_checknumber(L, 1), &ip);
|
||||
lua_pushnumber(L, ip);
|
||||
lua_pushnumber(L, fp);
|
||||
return 2;
|
||||
}
|
||||
|
||||
#else // #ifndef LUA_NUMBER_INTEGRAL
|
||||
|
||||
// In integer math, floor() and ceil() give the same value;
|
||||
// having them in the integer library allows you to write code that
|
||||
// works in both integer and floating point versions of Lua.
|
||||
// This identity function is used for them.
|
||||
|
||||
static int math_identity (lua_State *L) {
|
||||
lua_pushnumber(L, luaL_checknumber(L, 1));
|
||||
return 1;
|
||||
}
|
||||
|
||||
#endif // #ifndef LUA_NUMBER_INTEGRAL
|
||||
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
// Integer square root for integer version
|
||||
static lua_Number isqrt(lua_Number x)
|
||||
{
|
||||
lua_Number op, res, one;
|
||||
|
||||
op = x; res = 0;
|
||||
|
||||
/* "one" starts at the highest power of four <= than the argument. */
|
||||
one = 1 << 30; /* second-to-top bit set */
|
||||
while (one > op) one >>= 2;
|
||||
|
||||
while (one != 0) {
|
||||
if (op >= res + one) {
|
||||
op = op - (res + one);
|
||||
res = res + 2 * one;
|
||||
}
|
||||
res >>= 1;
|
||||
one >>= 2;
|
||||
}
|
||||
return(res);
|
||||
}
|
||||
#endif
|
||||
|
||||
static int math_sqrt (lua_State *L) {
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
lua_Number x = luaL_checknumber(L, 1);
|
||||
luaL_argcheck(L, 0<=x, 1, "negative");
|
||||
lua_pushnumber(L, isqrt(x));
|
||||
#else
|
||||
lua_pushnumber(L, sqrt(luaL_checknumber(L, 1)));
|
||||
#endif
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
# define pow(a,b) luai_ipow(a,b)
|
||||
#endif
|
||||
|
||||
static int math_pow (lua_State *L) {
|
||||
lua_pushnumber(L, pow(luaL_checknumber(L, 1), luaL_checknumber(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
# undef pow
|
||||
#endif
|
||||
|
||||
|
||||
#ifndef LUA_NUMBER_INTEGRAL
|
||||
|
||||
static int math_log (lua_State *L) {
|
||||
lua_pushnumber(L, log(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_log10 (lua_State *L) {
|
||||
lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_exp (lua_State *L) {
|
||||
lua_pushnumber(L, exp(luaL_checknumber(L, 1)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_deg (lua_State *L) {
|
||||
lua_pushnumber(L, luaL_checknumber(L, 1)/RADIANS_PER_DEGREE);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_rad (lua_State *L) {
|
||||
lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int math_frexp (lua_State *L) {
|
||||
int e;
|
||||
lua_pushnumber(L, frexp(luaL_checknumber(L, 1), &e));
|
||||
lua_pushinteger(L, e);
|
||||
return 2;
|
||||
}
|
||||
|
||||
static int math_ldexp (lua_State *L) {
|
||||
lua_pushnumber(L, ldexp(luaL_checknumber(L, 1), luaL_checkint(L, 2)));
|
||||
return 1;
|
||||
}
|
||||
|
||||
#endif // #ifdef LUA_NUMBER_INTEGRAL
|
||||
|
||||
static int math_min (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
lua_Number dmin = luaL_checknumber(L, 1);
|
||||
int i;
|
||||
for (i=2; i<=n; i++) {
|
||||
lua_Number d = luaL_checknumber(L, i);
|
||||
if (d < dmin)
|
||||
dmin = d;
|
||||
}
|
||||
lua_pushnumber(L, dmin);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
static int math_max (lua_State *L) {
|
||||
int n = lua_gettop(L); /* number of arguments */
|
||||
lua_Number dmax = luaL_checknumber(L, 1);
|
||||
int i;
|
||||
for (i=2; i<=n; i++) {
|
||||
lua_Number d = luaL_checknumber(L, i);
|
||||
if (d > dmax)
|
||||
dmax = d;
|
||||
}
|
||||
lua_pushnumber(L, dmax);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
|
||||
static int math_random (lua_State *L) {
|
||||
lua_Number r = (lua_Number)(rand()%RAND_MAX);
|
||||
|
||||
switch (lua_gettop(L)) { /* check number of arguments */
|
||||
case 0: { /* no arguments */
|
||||
lua_pushnumber(L, 0); /* Number between 0 and 1 - always 0 with ints */
|
||||
break;
|
||||
}
|
||||
case 1: { /* only upper limit */
|
||||
int u = luaL_checkint(L, 1);
|
||||
luaL_argcheck(L, 1<=u, 1, "interval is empty");
|
||||
lua_pushnumber(L, (r % u)+1); /* int between 1 and `u' */
|
||||
break;
|
||||
}
|
||||
case 2: { /* lower and upper limits */
|
||||
int l = luaL_checkint(L, 1);
|
||||
int u = luaL_checkint(L, 2);
|
||||
luaL_argcheck(L, l<=u, 2, "interval is empty");
|
||||
lua_pushnumber(L, (r%(u-l+1))+l); /* int between `l' and `u' */
|
||||
break;
|
||||
}
|
||||
default: return luaL_error(L, "wrong number of arguments");
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static int math_random (lua_State *L) {
|
||||
/* the `%' avoids the (rare) case of r==1, and is needed also because on
|
||||
some systems (SunOS!) `rand()' may return a value larger than RAND_MAX */
|
||||
lua_Number r = (lua_Number)(rand()%RAND_MAX) / (lua_Number)RAND_MAX;
|
||||
switch (lua_gettop(L)) { /* check number of arguments */
|
||||
case 0: { /* no arguments */
|
||||
lua_pushnumber(L, r); /* Number between 0 and 1 */
|
||||
break;
|
||||
}
|
||||
case 1: { /* only upper limit */
|
||||
int u = luaL_checkint(L, 1);
|
||||
luaL_argcheck(L, 1<=u, 1, "interval is empty");
|
||||
lua_pushnumber(L, floor(r*u)+1); /* int between 1 and `u' */
|
||||
break;
|
||||
}
|
||||
case 2: { /* lower and upper limits */
|
||||
int l = luaL_checkint(L, 1);
|
||||
int u = luaL_checkint(L, 2);
|
||||
luaL_argcheck(L, l<=u, 2, "interval is empty");
|
||||
lua_pushnumber(L, floor(r*(u-l+1))+l); /* int between `l' and `u' */
|
||||
break;
|
||||
}
|
||||
default: return luaL_error(L, "wrong number of arguments");
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
static int math_randomseed (lua_State *L) {
|
||||
srand(luaL_checkint(L, 1));
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define MIN_OPT_LEVEL 1
|
||||
#include "lrodefs.h"
|
||||
const LUA_REG_TYPE math_map[] = {
|
||||
#ifdef LUA_NUMBER_INTEGRAL
|
||||
{LSTRKEY("abs"), LFUNCVAL(math_abs)},
|
||||
{LSTRKEY("ceil"), LFUNCVAL(math_identity)},
|
||||
{LSTRKEY("floor"), LFUNCVAL(math_identity)},
|
||||
{LSTRKEY("max"), LFUNCVAL(math_max)},
|
||||
{LSTRKEY("min"), LFUNCVAL(math_min)},
|
||||
{LSTRKEY("pow"), LFUNCVAL(math_pow)},
|
||||
{LSTRKEY("random"), LFUNCVAL(math_random)},
|
||||
{LSTRKEY("randomseed"), LFUNCVAL(math_randomseed)},
|
||||
{LSTRKEY("sqrt"), LFUNCVAL(math_sqrt)},
|
||||
#if LUA_OPTIMIZE_MEMORY > 0
|
||||
{LSTRKEY("huge"), LNUMVAL(LONG_MAX)},
|
||||
#endif
|
||||
#else
|
||||
{LSTRKEY("abs"), LFUNCVAL(math_abs)},
|
||||
{LSTRKEY("acos"), LFUNCVAL(math_acos)},
|
||||
{LSTRKEY("asin"), LFUNCVAL(math_asin)},
|
||||
{LSTRKEY("atan2"), LFUNCVAL(math_atan2)},
|
||||
{LSTRKEY("atan"), LFUNCVAL(math_atan)},
|
||||
{LSTRKEY("ceil"), LFUNCVAL(math_ceil)},
|
||||
{LSTRKEY("cosh"), LFUNCVAL(math_cosh)},
|
||||
{LSTRKEY("cos"), LFUNCVAL(math_cos)},
|
||||
{LSTRKEY("deg"), LFUNCVAL(math_deg)},
|
||||
{LSTRKEY("exp"), LFUNCVAL(math_exp)},
|
||||
{LSTRKEY("floor"), LFUNCVAL(math_floor)},
|
||||
{LSTRKEY("fmod"), LFUNCVAL(math_fmod)},
|
||||
#if LUA_OPTIMIZE_MEMORY > 0 && defined(LUA_COMPAT_MOD)
|
||||
{LSTRKEY("mod"), LFUNCVAL(math_fmod)},
|
||||
#endif
|
||||
{LSTRKEY("frexp"), LFUNCVAL(math_frexp)},
|
||||
{LSTRKEY("ldexp"), LFUNCVAL(math_ldexp)},
|
||||
{LSTRKEY("log10"), LFUNCVAL(math_log10)},
|
||||
{LSTRKEY("log"), LFUNCVAL(math_log)},
|
||||
{LSTRKEY("max"), LFUNCVAL(math_max)},
|
||||
{LSTRKEY("min"), LFUNCVAL(math_min)},
|
||||
{LSTRKEY("modf"), LFUNCVAL(math_modf)},
|
||||
{LSTRKEY("pow"), LFUNCVAL(math_pow)},
|
||||
{LSTRKEY("rad"), LFUNCVAL(math_rad)},
|
||||
{LSTRKEY("random"), LFUNCVAL(math_random)},
|
||||
{LSTRKEY("randomseed"), LFUNCVAL(math_randomseed)},
|
||||
{LSTRKEY("sinh"), LFUNCVAL(math_sinh)},
|
||||
{LSTRKEY("sin"), LFUNCVAL(math_sin)},
|
||||
{LSTRKEY("sqrt"), LFUNCVAL(math_sqrt)},
|
||||
{LSTRKEY("tanh"), LFUNCVAL(math_tanh)},
|
||||
{LSTRKEY("tan"), LFUNCVAL(math_tan)},
|
||||
#if LUA_OPTIMIZE_MEMORY > 0
|
||||
{LSTRKEY("pi"), LNUMVAL(PI)},
|
||||
{LSTRKEY("huge"), LNUMVAL(HUGE_VAL)},
|
||||
#endif // #if LUA_OPTIMIZE_MEMORY > 0
|
||||
#endif // #ifdef LUA_NUMBER_INTEGRAL
|
||||
{LNILKEY, LNILVAL}
|
||||
};
|
||||
|
||||
|
||||
/*
|
||||
** Open math library
|
||||
*/
|
||||
|
||||
#if defined LUA_NUMBER_INTEGRAL
|
||||
# include <limits.h> /* for LONG_MAX */
|
||||
#endif
|
||||
|
||||
LUALIB_API int luaopen_math (lua_State *L) {
|
||||
#if LUA_OPTIMIZE_MEMORY > 0
|
||||
return 0;
|
||||
#else
|
||||
luaL_register(L, LUA_MATHLIBNAME, math_map);
|
||||
# if defined LUA_NUMBER_INTEGRAL
|
||||
lua_pushnumber(L, LONG_MAX);
|
||||
lua_setfield(L, -2, "huge");
|
||||
# else
|
||||
lua_pushnumber(L, PI);
|
||||
lua_setfield(L, -2, "pi");
|
||||
lua_pushnumber(L, HUGE_VAL);
|
||||
lua_setfield(L, -2, "huge");
|
||||
# if defined(LUA_COMPAT_MOD)
|
||||
lua_getfield(L, -1, "fmod");
|
||||
lua_setfield(L, -2, "mod");
|
||||
# endif
|
||||
# endif
|
||||
return 1;
|
||||
#endif
|
||||
}
|
||||
Reference in New Issue
Block a user