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mirror of https://github.com/lua/lua synced 2025-03-29 00:52:58 +03:00

Lua standard mathematical library

This commit is contained in:
Roberto Ierusalimschy 1997-09-16 16:25:59 -03:00
parent dadba4d6ed
commit b945fae40e
3 changed files with 195 additions and 234 deletions

195
lmathlib.c Normal file

@ -0,0 +1,195 @@
/*
** $Id: $
** Lua standard mathematical library
** See Copyright Notice in lua.h
*/
#include <stdlib.h>
#include <math.h>
#include "lauxlib.h"
#include "lua.h"
#include "lualib.h"
#ifndef PI
#define PI 3.14159265358979323846
#endif
#define TODEGREE(a) ((a)*180.0/PI)
#define TORAD(a) ((a)*PI/180.0)
static void math_abs (void)
{
double d = luaL_check_number(1);
if (d < 0) d = -d;
lua_pushnumber(d);
}
static void math_sin (void)
{
lua_pushnumber(sin(TORAD(luaL_check_number(1))));
}
static void math_cos (void)
{
lua_pushnumber(cos(TORAD(luaL_check_number(1))));
}
static void math_tan (void)
{
lua_pushnumber(tan(TORAD(luaL_check_number(1))));
}
static void math_asin (void)
{
lua_pushnumber(asin(TODEGREE(luaL_check_number(1))));
}
static void math_acos (void)
{
lua_pushnumber(acos(TODEGREE(luaL_check_number(1))));
}
static void math_atan (void)
{
lua_pushnumber(atan(TODEGREE(luaL_check_number(1))));
}
static void math_atan2 (void)
{
lua_pushnumber(TODEGREE(atan2(luaL_check_number(1), luaL_check_number(2))));
}
static void math_ceil (void)
{
lua_pushnumber(ceil(luaL_check_number(1)));
}
static void math_floor (void)
{
lua_pushnumber(floor(luaL_check_number(1)));
}
static void math_mod (void)
{
lua_pushnumber(fmod(luaL_check_number(1), luaL_check_number(2)));
}
static void math_sqrt (void)
{
lua_pushnumber(sqrt(luaL_check_number(1)));
}
static void math_pow (void)
{
lua_pushnumber(pow(luaL_check_number(1), luaL_check_number(2)));
}
static void math_log (void)
{
lua_pushnumber(log(luaL_check_number(1)));
}
static void math_log10 (void)
{
lua_pushnumber(log10(luaL_check_number(1)));
}
static void math_exp (void)
{
lua_pushnumber(exp(luaL_check_number(1)));
}
static void math_deg (void)
{
lua_pushnumber(luaL_check_number(1)*180./PI);
}
static void math_rad (void)
{
lua_pushnumber(luaL_check_number(1)/180.*PI);
}
static void math_min (void)
{
int i = 1;
double dmin = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT) {
double d = luaL_check_number(i);
if (d < dmin)
dmin = d;
}
lua_pushnumber(dmin);
}
static void math_max (void)
{
int i = 1;
double dmax = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT) {
double d = luaL_check_number(i);
if (d > dmax)
dmax = d;
}
lua_pushnumber(dmax);
}
static void math_random (void)
{
double l = luaL_opt_number(1, 0);
double r = (double)rand() / (double)RAND_MAX;
if (l == 0)
lua_pushnumber(r);
else
lua_pushnumber((int)(r*l)+1);
}
static void math_randomseed (void)
{
srand(luaL_check_number(1));
}
static struct luaL_reg mathlib[] = {
{"abs", math_abs},
{"sin", math_sin},
{"cos", math_cos},
{"tan", math_tan},
{"asin", math_asin},
{"acos", math_acos},
{"atan", math_atan},
{"atan2", math_atan2},
{"ceil", math_ceil},
{"floor", math_floor},
{"mod", math_mod},
{"sqrt", math_sqrt},
{"min", math_min},
{"max", math_max},
{"log", math_log},
{"log10", math_log10},
{"exp", math_exp},
{"deg", math_deg},
{"rad", math_rad},
{"random", math_random},
{"randomseed", math_randomseed}
};
/*
** Open math library
*/
void lua_mathlibopen (void)
{
luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
lua_pushcfunction(math_pow);
lua_pushnumber(0); /* to get its tag */
lua_settagmethod(lua_tag(lua_pop()), "pow");
}

221
mathlib.c

@ -1,221 +0,0 @@
/*
** mathlib.c
** Mathematics library to LUA
*/
char *rcs_mathlib="$Id: mathlib.c,v 1.25 1997/06/19 18:03:04 roberto Exp roberto $";
#include <stdlib.h>
#include <math.h>
#include "lualib.h"
#include "auxlib.h"
#include "lua.h"
#ifndef PI
#define PI 3.14159265358979323846
#endif
#define TODEGREE(a) ((a)*180.0/PI)
#define TORAD(a) ((a)*PI/180.0)
static void math_abs (void)
{
double d = luaL_check_number(1);
if (d < 0) d = -d;
lua_pushnumber (d);
}
static void math_sin (void)
{
double d = luaL_check_number(1);
lua_pushnumber (sin(TORAD(d)));
}
static void math_cos (void)
{
double d = luaL_check_number(1);
lua_pushnumber (cos(TORAD(d)));
}
static void math_tan (void)
{
double d = luaL_check_number(1);
lua_pushnumber (tan(TORAD(d)));
}
static void math_asin (void)
{
double d = luaL_check_number(1);
lua_pushnumber (TODEGREE(asin(d)));
}
static void math_acos (void)
{
double d = luaL_check_number(1);
lua_pushnumber (TODEGREE(acos(d)));
}
static void math_atan (void)
{
double d = luaL_check_number(1);
lua_pushnumber (TODEGREE(atan(d)));
}
static void math_atan2 (void)
{
double d1 = luaL_check_number(1);
double d2 = luaL_check_number(2);
lua_pushnumber (TODEGREE(atan2(d1, d2)));
}
static void math_ceil (void)
{
double d = luaL_check_number(1);
lua_pushnumber (ceil(d));
}
static void math_floor (void)
{
double d = luaL_check_number(1);
lua_pushnumber (floor(d));
}
static void math_mod (void)
{
float x = luaL_check_number(1);
float y = luaL_check_number(2);
lua_pushnumber(fmod(x, y));
}
static void math_sqrt (void)
{
double d = luaL_check_number(1);
lua_pushnumber (sqrt(d));
}
static void math_pow (void)
{
double d1 = luaL_check_number(1);
double d2 = luaL_check_number(2);
lua_pushnumber(pow(d1,d2));
}
static void math_min (void)
{
int i=1;
double dmin = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT)
{
double d = luaL_check_number(i);
if (d < dmin) dmin = d;
}
lua_pushnumber (dmin);
}
static void math_max (void)
{
int i=1;
double dmax = luaL_check_number(i);
while (lua_getparam(++i) != LUA_NOOBJECT)
{
double d = luaL_check_number(i);
if (d > dmax) dmax = d;
}
lua_pushnumber (dmax);
}
static void math_log (void)
{
double d = luaL_check_number(1);
lua_pushnumber (log(d));
}
static void math_log10 (void)
{
double d = luaL_check_number(1);
lua_pushnumber (log10(d));
}
static void math_exp (void)
{
double d = luaL_check_number(1);
lua_pushnumber (exp(d));
}
static void math_deg (void)
{
float d = luaL_check_number(1);
lua_pushnumber (d*180./PI);
}
static void math_rad (void)
{
float d = luaL_check_number(1);
lua_pushnumber (d/180.*PI);
}
static void math_random (void)
{
double r = (double)(rand()%RAND_MAX) / (double)RAND_MAX;
if (lua_getparam(1) == LUA_NOOBJECT)
lua_pushnumber(r);
else
lua_pushnumber((int)(r*luaL_check_number(1)) + 1);
}
static void math_randomseed (void)
{
srand(luaL_check_number(1));
}
static struct luaL_reg mathlib[] = {
{"abs", math_abs},
{"sin", math_sin},
{"cos", math_cos},
{"tan", math_tan},
{"asin", math_asin},
{"acos", math_acos},
{"atan", math_atan},
{"atan2", math_atan2},
{"ceil", math_ceil},
{"floor", math_floor},
{"mod", math_mod},
{"sqrt", math_sqrt},
{"min", math_min},
{"max", math_max},
{"log", math_log},
{"log10", math_log10},
{"exp", math_exp},
{"deg", math_deg},
{"rad", math_rad},
{"random", math_random},
{"randomseed", math_randomseed}
};
/*
** Open math library
*/
void mathlib_open (void)
{
luaL_openlib(mathlib, (sizeof(mathlib)/sizeof(mathlib[0])));
lua_pushcfunction(math_pow);
lua_pushnumber(0); /* to get its tag */
lua_settagmethod(lua_tag(lua_pop()), "pow");
}

@ -1,13 +0,0 @@
/*
** Math library to LUA
** TeCGraf - PUC-Rio
** $Id: $
*/
#ifndef strlib_h
void mathlib_open (void);
#endif