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/* Math module -- standard C math library functions, pi and e */
#include "allobjects.h"
#include "modsupport.h"
#include <math.h>
static int
getdoublearg(args, px)
register object *args;
double *px;
{
if (args == NULL)
return err_badarg();
if (is_floatobject(args)) {
*px = getfloatvalue(args);
return 1;
}
if (is_intobject(args)) {
*px = getintvalue(args);
return 1;
}
return err_badarg();
}
static int
get2doublearg(args, px, py)
register object *args;
double *px, *py;
{
if (args == NULL || !is_tupleobject(args) || gettuplesize(args) != 2)
return err_badarg();
return getdoublearg(gettupleitem(args, 0), px) &&
getdoublearg(gettupleitem(args, 1), py);
}
static object *
math_1(args, func)
object *args;
double (*func) FPROTO((double));
{
double x;
if (!getdoublearg(args, &x))
return NULL;
errno = 0;
x = (*func)(x);
if (errno != 0)
return NULL;
else
return newfloatobject(x);
}
static object *
math_2(args, func)
object *args;
double (*func) FPROTO((double, double));
{
double x, y;
if (!get2doublearg(args, &x, &y))
return NULL;
errno = 0;
x = (*func)(x, y);
if (errno != 0)
return NULL;
else
return newfloatobject(x);
}
#define FUNC1(stubname, func) \
static object * stubname(self, args) object *self, *args; { \
return math_1(args, func); \
}
#define FUNC2(stubname, func) \
static object * stubname(self, args) object *self, *args; { \
return math_2(args, func); \
}
FUNC1(math_acos, acos)
FUNC1(math_asin, asin)
FUNC1(math_atan, atan)
FUNC2(math_atan2, atan2)
FUNC1(math_ceil, ceil)
FUNC1(math_cos, cos)
FUNC1(math_cosh, cosh)
FUNC1(math_exp, exp)
FUNC1(math_fabs, fabs)
FUNC1(math_floor, floor)
#if 0
/* XXX This one is not in the Amoeba library yet, so what the heck... */
FUNC2(math_fmod, fmod)
#endif
FUNC1(math_log, log)
FUNC1(math_log10, log10)
FUNC2(math_pow, pow)
FUNC1(math_sin, sin)
FUNC1(math_sinh, sinh)
FUNC1(math_sqrt, sqrt)
FUNC1(math_tan, tan)
FUNC1(math_tanh, tanh)
#if 0
/* What about these? */
double frexp(double x, int *i);
double ldexp(double x, int n);
double modf(double x, double *i);
#endif
static struct methodlist math_methods[] = {
{"acos", math_acos},
{"asin", math_asin},
{"atan", math_atan},
{"atan2", math_atan2},
{"ceil", math_ceil},
{"cos", math_cos},
{"cosh", math_cosh},
{"exp", math_exp},
{"fabs", math_fabs},
{"floor", math_floor},
#if 0
{"fmod", math_fmod},
{"frexp", math_freqp},
{"ldexp", math_ldexp},
#endif
{"log", math_log},
{"log10", math_log10},
#if 0
{"modf", math_modf},
#endif
{"pow", math_pow},
{"sin", math_sin},
{"sinh", math_sinh},
{"sqrt", math_sqrt},
{"tan", math_tan},
{"tanh", math_tanh},
{NULL, NULL} /* sentinel */
};
void
initmath()
{
object *m, *d, *v;
m = initmodule("math", math_methods);
d = getmoduledict(m);
dictinsert(d, "pi", v = newfloatobject(atan(1.0) * 4.0));
DECREF(v);
dictinsert(d, "e", v = newfloatobject(exp(1.0)));
DECREF(v);
}
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