diff options
Diffstat (limited to 'Modules/_math.h')
-rw-r--r-- | Modules/_math.h | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/Modules/_math.h b/Modules/_math.h index b8477d2..2285b64 100644 --- a/Modules/_math.h +++ b/Modules/_math.h @@ -23,42 +23,3 @@ _Py_log1p(double x) } #define m_log1p _Py_log1p - -/* - wrapper for atan2 that deals directly with special cases before - delegating to the platform libm for the remaining cases. This - is necessary to get consistent behaviour across platforms. - Windows, FreeBSD and alpha Tru64 are amongst platforms that don't - always follow C99. Windows screws up atan2 for inf and nan, and - alpha Tru64 5.1 doesn't follow C99 for atan2(0., 0.). -*/ - -static double -_Py_atan2(double y, double x) -{ - if (isnan(x) || isnan(y)) - return Py_NAN; - if (isinf(y)) { - if (isinf(x)) { - if (copysign(1., x) == 1.) - /* atan2(+-inf, +inf) == +-pi/4 */ - return copysign(0.25*Py_MATH_PI, y); - else - /* atan2(+-inf, -inf) == +-pi*3/4 */ - return copysign(0.75*Py_MATH_PI, y); - } - /* atan2(+-inf, x) == +-pi/2 for finite x */ - return copysign(0.5*Py_MATH_PI, y); - } - if (isinf(x) || y == 0.) { - if (copysign(1., x) == 1.) - /* atan2(+-y, +inf) = atan2(+-0, +x) = +-0. */ - return copysign(0., y); - else - /* atan2(+-y, -inf) = atan2(+-0., -x) = +-pi. */ - return copysign(Py_MATH_PI, y); - } - return atan2(y, x); -} - -#define m_atan2 _Py_atan2 |