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mathlib.c

@@ -0,0 +1,234 @@
+/*
+** mathlib.c
+** Mathematica library to LUA
+**
+** Waldemar Celes Filho
+** TeCGraf - PUC-Rio
+** 19 May 93
+*/
+
+#include <stdio.h>		/* NULL */
+#include <math.h>
+
+#include "lua.h"
+
+static void math_abs (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `abs'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `abs'"); return; }
+ 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 == NULL)
+ { lua_error ("too few arguments to function `sin'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `sin'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (sin(d));
+}
+
+
+
+static void math_cos (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `cos'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `cos'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (cos(d));
+}
+
+
+
+static void math_tan (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `tan'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `tan'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (tan(d));
+}
+
+
+static void math_asin (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `asin'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `asin'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (asin(d));
+}
+
+
+static void math_acos (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `acos'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `acos'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (acos(d));
+}
+
+
+
+static void math_atan (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `atan'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `atan'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (atan(d));
+}
+
+
+static void math_ceil (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `ceil'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `ceil'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (ceil(d));
+}
+
+
+static void math_floor (void)
+{
+ double d;
+ lua_Object o = lua_getparam (1);
+ if (o == NULL)
+ { lua_error ("too few arguments to function `floor'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `floor'"); return; }
+ 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'"); return; }
+ 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 == NULL)
+ { lua_error ("too few arguments to function `sqrt'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `sqrt'"); return; }
+ d = lua_getnumber(o);
+ lua_pushnumber (sqrt(d));
+}
+
+static void math_pow (void)
+{
+ double 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 `pow'"); return; }
+ d1 = lua_getnumber(o1);
+ 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++)) == NULL)
+ { lua_error ("too few arguments to function `min'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `min'"); return; }
+ dmin = lua_getnumber (o);
+ while ((o = lua_getparam(i++)) != NULL)
+ {
+  if (!lua_isnumber(o))
+  { lua_error ("incorrect arguments to function `min'"); return; }
+  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++)) == NULL)
+ { lua_error ("too few arguments to function `max'"); return; }
+ if (!lua_isnumber(o))
+ { lua_error ("incorrect arguments to function `max'"); return; }
+ dmax = lua_getnumber (o);
+ while ((o = lua_getparam(i++)) != NULL)
+ {
+  if (!lua_isnumber(o))
+  { lua_error ("incorrect arguments to function `max'"); return; }
+  d = lua_getnumber (o);
+  if (d > dmax) dmax = d;
+ }
+ lua_pushnumber (dmax);
+}
+
+
+
+/*
+** 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 ("pow",   math_pow);
+ lua_register ("min",   math_min);
+ lua_register ("max",   math_max);
+}