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