proxmark3/liblua/lmathlib.c

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/*
** $Id: lmathlib.c,v 1.83 2013/03/07 18:21:32 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"
#undef PI
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#define PI ((lua_Number)(3.1415926535897932384626433832795))
#define RADIANS_PER_DEGREE ((lua_Number)(PI/180.0))
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static int math_abs(lua_State *L) {
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lua_pushnumber(L, l_mathop(fabs)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_sin(lua_State *L) {
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lua_pushnumber(L, l_mathop(sin)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_sinh(lua_State *L) {
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lua_pushnumber(L, l_mathop(sinh)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_cos(lua_State *L) {
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lua_pushnumber(L, l_mathop(cos)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_cosh(lua_State *L) {
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lua_pushnumber(L, l_mathop(cosh)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_tan(lua_State *L) {
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lua_pushnumber(L, l_mathop(tan)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_tanh(lua_State *L) {
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lua_pushnumber(L, l_mathop(tanh)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_asin(lua_State *L) {
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lua_pushnumber(L, l_mathop(asin)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_acos(lua_State *L) {
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lua_pushnumber(L, l_mathop(acos)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_atan(lua_State *L) {
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lua_pushnumber(L, l_mathop(atan)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_atan2(lua_State *L) {
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lua_pushnumber(L, l_mathop(atan2)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
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}
static int math_ceil(lua_State *L) {
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lua_pushnumber(L, l_mathop(ceil)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_floor(lua_State *L) {
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lua_pushnumber(L, l_mathop(floor)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_fmod(lua_State *L) {
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lua_pushnumber(L, l_mathop(fmod)(luaL_checknumber(L, 1),
luaL_checknumber(L, 2)));
return 1;
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}
static int math_modf(lua_State *L) {
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lua_Number ip;
lua_Number fp = l_mathop(modf)(luaL_checknumber(L, 1), &ip);
lua_pushnumber(L, ip);
lua_pushnumber(L, fp);
return 2;
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}
static int math_sqrt(lua_State *L) {
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lua_pushnumber(L, l_mathop(sqrt)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_pow(lua_State *L) {
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lua_Number x = luaL_checknumber(L, 1);
lua_Number y = luaL_checknumber(L, 2);
lua_pushnumber(L, l_mathop(pow)(x, y));
return 1;
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}
static int math_log(lua_State *L) {
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lua_Number x = luaL_checknumber(L, 1);
lua_Number res;
if (lua_isnoneornil(L, 2))
res = l_mathop(log)(x);
else {
lua_Number base = luaL_checknumber(L, 2);
if (base == (lua_Number)10.0) res = l_mathop(log10)(x);
else res = l_mathop(log)(x) / l_mathop(log)(base);
}
lua_pushnumber(L, res);
return 1;
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}
#if defined(LUA_COMPAT_LOG10)
static int math_log10(lua_State *L) {
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lua_pushnumber(L, l_mathop(log10)(luaL_checknumber(L, 1)));
return 1;
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}
#endif
static int math_exp(lua_State *L) {
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lua_pushnumber(L, l_mathop(exp)(luaL_checknumber(L, 1)));
return 1;
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}
static int math_deg(lua_State *L) {
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lua_pushnumber(L, luaL_checknumber(L, 1) / RADIANS_PER_DEGREE);
return 1;
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}
static int math_rad(lua_State *L) {
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lua_pushnumber(L, luaL_checknumber(L, 1)*RADIANS_PER_DEGREE);
return 1;
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}
static int math_frexp(lua_State *L) {
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int e;
lua_pushnumber(L, l_mathop(frexp)(luaL_checknumber(L, 1), &e));
lua_pushinteger(L, e);
return 2;
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}
static int math_ldexp(lua_State *L) {
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lua_Number x = luaL_checknumber(L, 1);
int ep = luaL_checkint(L, 2);
lua_pushnumber(L, l_mathop(ldexp)(x, ep));
return 1;
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}
static int math_min(lua_State *L) {
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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;
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}
static int math_max(lua_State *L) {
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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;
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}
static int math_random(lua_State *L) {
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/* 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 */
lua_Number u = luaL_checknumber(L, 1);
luaL_argcheck(L, (lua_Number)1.0 <= u, 1, "interval is empty");
lua_pushnumber(L, l_mathop(floor)(r * u) + (lua_Number)(1.0)); /* [1, u] */
break;
}
case 2: { /* lower and upper limits */
lua_Number l = luaL_checknumber(L, 1);
lua_Number u = luaL_checknumber(L, 2);
luaL_argcheck(L, l <= u, 2, "interval is empty");
lua_pushnumber(L, l_mathop(floor)(r * (u - l + 1)) + l); /* [l, u] */
break;
}
default:
return luaL_error(L, "wrong number of arguments");
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}
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return 1;
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}
static int math_randomseed(lua_State *L) {
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srand(luaL_checkunsigned(L, 1));
(void)rand(); /* discard first value to avoid undesirable correlations */
return 0;
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}
static const luaL_Reg mathlib[] = {
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{"abs", math_abs},
{"acos", math_acos},
{"asin", math_asin},
{"atan2", math_atan2},
{"atan", math_atan},
{"ceil", math_ceil},
{"cosh", math_cosh},
{"cos", math_cos},
{"deg", math_deg},
{"exp", math_exp},
{"floor", math_floor},
{"fmod", math_fmod},
{"frexp", math_frexp},
{"ldexp", math_ldexp},
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#if defined(LUA_COMPAT_LOG10)
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{"log10", math_log10},
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#endif
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{"log", math_log},
{"max", math_max},
{"min", math_min},
{"modf", math_modf},
{"pow", math_pow},
{"rad", math_rad},
{"random", math_random},
{"randomseed", math_randomseed},
{"sinh", math_sinh},
{"sin", math_sin},
{"sqrt", math_sqrt},
{"tanh", math_tanh},
{"tan", math_tan},
{NULL, NULL}
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};
/*
** Open math library
*/
LUAMOD_API int luaopen_math(lua_State *L) {
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luaL_newlib(L, mathlib);
lua_pushnumber(L, PI);
lua_setfield(L, -2, "pi");
lua_pushnumber(L, HUGE_VAL);
lua_setfield(L, -2, "huge");
return 1;
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}