Added degrees() and radians() to mathmodule. Closes patch 552452 and

feature request 426539.

diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 4609f6040f448f5ecba8e3144c33d8d1e0b8656c..b6489fdc63ba4b8cc0942961731ad03f967794a3 100644 (file)
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -274,6 +274,31 @@ math_log10(PyObject *self, PyObject *args)
 static char math_log10_doc[] =
 "log10(x) -> the base 10 logarithm of x.";
 
+static const double degToRad = 3.141592653589793238462643383 / 180.0;
+
+static PyObject *
+math_degrees(PyObject *self, PyObject *args)
+{
+       double x;
+       if (! PyArg_ParseTuple(args, "d:degrees", &x))
+               return NULL;
+       return PyFloat_FromDouble(x / degToRad);
+}
+
+static char math_degrees_doc[] =
+"degrees(x) -> converts angle x from radians to degrees";
+
+static PyObject *
+math_radians(PyObject *self, PyObject *args)
+{
+       double x;
+       if (! PyArg_ParseTuple(args, "d:radians", &x))
+               return NULL;
+       return PyFloat_FromDouble(x * degToRad);
+}
+
+static char math_radians_doc[] =
+"radians(x) -> converts angle x from degrees to radians";
 
 static PyMethodDef math_methods[] = {
        {"acos",        math_acos,      METH_VARARGS,   math_acos_doc},
@@ -283,6 +308,7 @@ static PyMethodDef math_methods[] = {
        {"ceil",        math_ceil,      METH_VARARGS,   math_ceil_doc},
        {"cos",         math_cos,       METH_VARARGS,   math_cos_doc},
        {"cosh",        math_cosh,      METH_VARARGS,   math_cosh_doc},
+       {"degrees",     math_degrees,   METH_VARARGS,   math_degrees_doc},
        {"exp",         math_exp,       METH_VARARGS,   math_exp_doc},
        {"fabs",        math_fabs,      METH_VARARGS,   math_fabs_doc},
        {"floor",       math_floor,     METH_VARARGS,   math_floor_doc},
@@ -294,6 +320,7 @@ static PyMethodDef math_methods[] = {
        {"log10",       math_log10,     METH_VARARGS,   math_log10_doc},
        {"modf",        math_modf,      METH_VARARGS,   math_modf_doc},
        {"pow",         math_pow,       METH_VARARGS,   math_pow_doc},
+       {"radians",     math_radians,   METH_VARARGS,   math_radians_doc},
        {"sin",         math_sin,       METH_VARARGS,   math_sin_doc},
        {"sinh",        math_sinh,      METH_VARARGS,   math_sinh_doc},
        {"sqrt",        math_sqrt,      METH_VARARGS,   math_sqrt_doc},