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// Symbols and macros to supply platform-independent interfaces to mathematical // functions and constants. #ifndef Py_PYMATH_H #define Py_PYMATH_H /* High precision definition of pi and e (Euler) * The values are taken from libc6's math.h. */ #ifndef Py_MATH_PIl #define Py_MATH_PIl 3.1415926535897932384626433832795029L #endif #ifndef Py_MATH_PI #define Py_MATH_PI 3.14159265358979323846 #endif #ifndef Py_MATH_El #define Py_MATH_El 2.7182818284590452353602874713526625L #endif #ifndef Py_MATH_E #define Py_MATH_E 2.7182818284590452354 #endif /* Tau (2pi) to 40 digits, taken from tauday.com/tau-digits. */ #ifndef Py_MATH_TAU #define Py_MATH_TAU 6.2831853071795864769252867665590057683943L #endif // Py_IS_NAN(X) // Return 1 if float or double arg is a NaN, else 0. #define Py_IS_NAN(X) isnan(X) // Py_IS_INFINITY(X) // Return 1 if float or double arg is an infinity, else 0. #define Py_IS_INFINITY(X) isinf(X) // Py_IS_FINITE(X) // Return 1 if float or double arg is neither infinite nor NAN, else 0. #define Py_IS_FINITE(X) isfinite(X) /* HUGE_VAL is supposed to expand to a positive double infinity. Python * uses Py_HUGE_VAL instead because some platforms are broken in this * respect. We used to embed code in pyport.h to try to worm around that, * but different platforms are broken in conflicting ways. If you're on * a platform where HUGE_VAL is defined incorrectly, fiddle your Python * config to #define Py_HUGE_VAL to something that works on your platform. */ #ifndef Py_HUGE_VAL # define Py_HUGE_VAL HUGE_VAL #endif // Py_NAN: Value that evaluates to a quiet Not-a-Number (NaN). #if !defined(Py_NAN) # if _Py__has_builtin(__builtin_nan) // Built-in implementation of the ISO C99 function nan(): quiet NaN. # define Py_NAN (__builtin_nan("")) #else // Use C99 NAN constant: quiet Not-A-Number. // NAN is a float, Py_NAN is a double: cast to double. # define Py_NAN ((double)NAN) # endif #endif #endif /* Py_PYMATH_H */