| // 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) |
| |
| // Py_INFINITY: Value that evaluates to a positive double infinity. |
| #ifndef Py_INFINITY |
| # define Py_INFINITY ((double)INFINITY) |
| #endif |
| |
| /* Py_HUGE_VAL should always be the same as Py_INFINITY. But historically |
| * this was not reliable and Python did not require IEEE floats and C99 |
| * conformity. Prefer Py_INFINITY for new code. |
| */ |
| #ifndef Py_HUGE_VAL |
| # define Py_HUGE_VAL HUGE_VAL |
| #endif |
| |
| /* Py_NAN: Value that evaluates to a quiet Not-a-Number (NaN). The sign is |
| * undefined and normally not relevant, but e.g. fixed for float("nan"). |
| */ |
| #if !defined(Py_NAN) |
| # define Py_NAN ((double)NAN) |
| #endif |
| |
| #endif /* Py_PYMATH_H */ |