mirror of https://github.com/lua/lua
315 lines
7.3 KiB
C
315 lines
7.3 KiB
C
/*
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** mathlib.c
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** Mathematics library to LUA
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*/
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char *rcs_mathlib="$Id: mathlib.c,v 1.5 1994/11/17 19:43:34 roberto Exp roberto $";
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#include <stdio.h> /* NULL */
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#include <math.h>
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#include "lualib.h"
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#include "lua.h"
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#define PI (3.141592653589793)
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#define TODEGREE(a) ((a)*180.0/PI)
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#define TORAD(a) ((a)*PI/180.0)
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static void math_abs (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `abs'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `abs'"); return; }
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d = lua_getnumber(o);
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if (d < 0) d = -d;
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lua_pushnumber (d);
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}
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static void math_sin (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `sin'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `sin'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (sin(TORAD(d)));
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}
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static void math_cos (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `cos'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `cos'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (cos(TORAD(d)));
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}
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static void math_tan (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `tan'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `tan'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (tan(TORAD(d)));
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}
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static void math_asin (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `asin'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `asin'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (TODEGREE(asin(d)));
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}
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static void math_acos (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `acos'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `acos'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (TODEGREE(acos(d)));
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}
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static void math_atan (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `atan'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `atan'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (TODEGREE(atan(d)));
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}
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static void math_ceil (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `ceil'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `ceil'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (ceil(d));
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}
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static void math_floor (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `floor'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `floor'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (floor(d));
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}
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static void math_mod (void)
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{
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int d1, d2;
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lua_Object o1 = lua_getparam (1);
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lua_Object o2 = lua_getparam (2);
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if (!lua_isnumber(o1) || !lua_isnumber(o2))
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{ lua_error ("incorrect arguments to function `mod'"); return; }
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d1 = (int) lua_getnumber(o1);
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d2 = (int) lua_getnumber(o2);
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lua_pushnumber (d1%d2);
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}
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static void math_sqrt (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `sqrt'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `sqrt'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (sqrt(d));
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}
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static int old_pow;
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static void math_pow (void)
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{
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lua_Object o1 = lua_getparam (1);
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lua_Object o2 = lua_getparam (2);
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lua_Object op = lua_getparam(3);
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if (!lua_isnumber(o1) || !lua_isnumber(o2) || *(lua_getstring(op)) != 'p')
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{
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lua_pushobject(o1);
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lua_pushobject(o2);
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lua_pushobject(op);
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if (lua_callfunction(lua_getlocked(old_pow)) != 0)
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lua_error(NULL);
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}
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else
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{
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double d1 = lua_getnumber(o1);
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double d2 = lua_getnumber(o2);
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lua_pushnumber (pow(d1,d2));
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}
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}
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static void math_min (void)
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{
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int i=1;
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double d, dmin;
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lua_Object o;
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if ((o = lua_getparam(i++)) == NULL)
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{ lua_error ("too few arguments to function `min'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `min'"); return; }
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dmin = lua_getnumber (o);
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while ((o = lua_getparam(i++)) != NULL)
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{
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `min'"); return; }
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d = lua_getnumber (o);
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if (d < dmin) dmin = d;
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}
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lua_pushnumber (dmin);
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}
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static void math_max (void)
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{
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int i=1;
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double d, dmax;
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lua_Object o;
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if ((o = lua_getparam(i++)) == NULL)
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{ lua_error ("too few arguments to function `max'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `max'"); return; }
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dmax = lua_getnumber (o);
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while ((o = lua_getparam(i++)) != NULL)
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{
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `max'"); return; }
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d = lua_getnumber (o);
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if (d > dmax) dmax = d;
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}
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lua_pushnumber (dmax);
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}
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static void math_log (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `log'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `log'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (log(d));
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}
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static void math_log10 (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `log10'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `log10'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (log10(d));
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}
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static void math_exp (void)
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{
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double d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `exp'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `exp'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (exp(d));
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}
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static void math_deg (void)
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{
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float d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `deg'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `deg'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (d*180./PI);
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}
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static void math_rad (void)
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{
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float d;
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lua_Object o = lua_getparam (1);
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if (o == NULL)
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{ lua_error ("too few arguments to function `rad'"); return; }
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if (!lua_isnumber(o))
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{ lua_error ("incorrect arguments to function `rad'"); return; }
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d = lua_getnumber(o);
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lua_pushnumber (d/180.*PI);
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}
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/*
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** Open math library
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*/
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void mathlib_open (void)
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{
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lua_register ("abs", math_abs);
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lua_register ("sin", math_sin);
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lua_register ("cos", math_cos);
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lua_register ("tan", math_tan);
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lua_register ("asin", math_asin);
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lua_register ("acos", math_acos);
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lua_register ("atan", math_atan);
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lua_register ("ceil", math_ceil);
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lua_register ("floor", math_floor);
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lua_register ("mod", math_mod);
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lua_register ("sqrt", math_sqrt);
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lua_register ("min", math_min);
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lua_register ("max", math_max);
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lua_register ("log", math_log);
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lua_register ("log10", math_log10);
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lua_register ("exp", math_exp);
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lua_register ("deg", math_deg);
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lua_register ("rad", math_rad);
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old_pow = lua_lockobject(lua_setfallback("arith", math_pow));
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}
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