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/*
** mathlib.c
** Mathematics library to LUA
*/
char *rcs_mathlib="$Id: mathlib.c,v 1.8 1995/01/04 18:49:54 roberto Exp $";
#include <stdio.h> /* NULL */
#include <math.h>
#include "lualib.h"
#include "lua.h"
#define PI 3.14159265358979323846
#define TODEGREE(a) ((a)*180.0/PI)
#define TORAD(a) ((a)*PI/180.0)
static void math_abs (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `abs'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `abs'");
d = lua_getnumber(o);
if (d < 0) d = -d;
lua_pushnumber (d);
}
static void math_sin (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `sin'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `sin'");
d = lua_getnumber(o);
lua_pushnumber (sin(TORAD(d)));
}
static void math_cos (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `cos'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `cos'");
d = lua_getnumber(o);
lua_pushnumber (cos(TORAD(d)));
}
static void math_tan (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `tan'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `tan'");
d = lua_getnumber(o);
lua_pushnumber (tan(TORAD(d)));
}
static void math_asin (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `asin'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `asin'");
d = lua_getnumber(o);
lua_pushnumber (TODEGREE(asin(d)));
}
static void math_acos (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `acos'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `acos'");
d = lua_getnumber(o);
lua_pushnumber (TODEGREE(acos(d)));
}
static void math_atan (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `atan'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `atan'");
d = lua_getnumber(o);
lua_pushnumber (TODEGREE(atan(d)));
}
static void math_ceil (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `ceil'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `ceil'");
d = lua_getnumber(o);
lua_pushnumber (ceil(d));
}
static void math_floor (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `floor'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `floor'");
d = lua_getnumber(o);
lua_pushnumber (floor(d));
}
static void math_mod (void)
{
int d1, d2;
lua_Object o1 = lua_getparam (1);
lua_Object o2 = lua_getparam (2);
if (!lua_isnumber(o1) || !lua_isnumber(o2))
lua_error ("incorrect arguments to function `mod'");
d1 = (int) lua_getnumber(o1);
d2 = (int) lua_getnumber(o2);
lua_pushnumber (d1%d2);
}
static void math_sqrt (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `sqrt'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `sqrt'");
d = lua_getnumber(o);
lua_pushnumber (sqrt(d));
}
static int old_pow;
static void math_pow (void)
{
lua_Object o1 = lua_getparam (1);
lua_Object o2 = lua_getparam (2);
lua_Object op = lua_getparam(3);
if (!lua_isnumber(o1) || !lua_isnumber(o2) || *(lua_getstring(op)) != 'p')
{
lua_Object old = lua_getlocked(old_pow);
lua_pushobject(o1);
lua_pushobject(o2);
lua_pushobject(op);
if (lua_callfunction(old) != 0)
lua_error(NULL);
}
else
{
double d1 = lua_getnumber(o1);
double d2 = lua_getnumber(o2);
lua_pushnumber (pow(d1,d2));
}
}
static void math_min (void)
{
int i=1;
double d, dmin;
lua_Object o;
if ((o = lua_getparam(i++)) == LUA_NOOBJECT)
lua_error ("too few arguments to function `min'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `min'");
dmin = lua_getnumber (o);
while ((o = lua_getparam(i++)) != LUA_NOOBJECT)
{
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `min'");
d = lua_getnumber (o);
if (d < dmin) dmin = d;
}
lua_pushnumber (dmin);
}
static void math_max (void)
{
int i=1;
double d, dmax;
lua_Object o;
if ((o = lua_getparam(i++)) == LUA_NOOBJECT)
lua_error ("too few arguments to function `max'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `max'");
dmax = lua_getnumber (o);
while ((o = lua_getparam(i++)) != LUA_NOOBJECT)
{
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `max'");
d = lua_getnumber (o);
if (d > dmax) dmax = d;
}
lua_pushnumber (dmax);
}
static void math_log (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `log'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `log'");
d = lua_getnumber(o);
lua_pushnumber (log(d));
}
static void math_log10 (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `log10'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `log10'");
d = lua_getnumber(o);
lua_pushnumber (log10(d));
}
static void math_exp (void)
{
double d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `exp'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `exp'");
d = lua_getnumber(o);
lua_pushnumber (exp(d));
}
static void math_deg (void)
{
float d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `deg'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `deg'");
d = lua_getnumber(o);
lua_pushnumber (d*180./PI);
}
static void math_rad (void)
{
float d;
lua_Object o = lua_getparam (1);
if (o == LUA_NOOBJECT)
lua_error ("too few arguments to function `rad'");
if (!lua_isnumber(o))
lua_error ("incorrect arguments to function `rad'");
d = lua_getnumber(o);
lua_pushnumber (d/180.*PI);
}
/*
** Open math library
*/
void mathlib_open (void)
{
lua_register ("abs", math_abs);
lua_register ("sin", math_sin);
lua_register ("cos", math_cos);
lua_register ("tan", math_tan);
lua_register ("asin", math_asin);
lua_register ("acos", math_acos);
lua_register ("atan", math_atan);
lua_register ("ceil", math_ceil);
lua_register ("floor", math_floor);
lua_register ("mod", math_mod);
lua_register ("sqrt", math_sqrt);
lua_register ("min", math_min);
lua_register ("max", math_max);
lua_register ("log", math_log);
lua_register ("log10", math_log10);
lua_register ("exp", math_exp);
lua_register ("deg", math_deg);
lua_register ("rad", math_rad);
old_pow = lua_lockobject(lua_setfallback("arith", math_pow));
}
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