17db96d56Sopenharmony_ci// Symbols and macros to supply platform-independent interfaces to mathematical 27db96d56Sopenharmony_ci// functions and constants. 37db96d56Sopenharmony_ci 47db96d56Sopenharmony_ci#ifndef Py_PYMATH_H 57db96d56Sopenharmony_ci#define Py_PYMATH_H 67db96d56Sopenharmony_ci 77db96d56Sopenharmony_ci/* High precision definition of pi and e (Euler) 87db96d56Sopenharmony_ci * The values are taken from libc6's math.h. 97db96d56Sopenharmony_ci */ 107db96d56Sopenharmony_ci#ifndef Py_MATH_PIl 117db96d56Sopenharmony_ci#define Py_MATH_PIl 3.1415926535897932384626433832795029L 127db96d56Sopenharmony_ci#endif 137db96d56Sopenharmony_ci#ifndef Py_MATH_PI 147db96d56Sopenharmony_ci#define Py_MATH_PI 3.14159265358979323846 157db96d56Sopenharmony_ci#endif 167db96d56Sopenharmony_ci 177db96d56Sopenharmony_ci#ifndef Py_MATH_El 187db96d56Sopenharmony_ci#define Py_MATH_El 2.7182818284590452353602874713526625L 197db96d56Sopenharmony_ci#endif 207db96d56Sopenharmony_ci 217db96d56Sopenharmony_ci#ifndef Py_MATH_E 227db96d56Sopenharmony_ci#define Py_MATH_E 2.7182818284590452354 237db96d56Sopenharmony_ci#endif 247db96d56Sopenharmony_ci 257db96d56Sopenharmony_ci/* Tau (2pi) to 40 digits, taken from tauday.com/tau-digits. */ 267db96d56Sopenharmony_ci#ifndef Py_MATH_TAU 277db96d56Sopenharmony_ci#define Py_MATH_TAU 6.2831853071795864769252867665590057683943L 287db96d56Sopenharmony_ci#endif 297db96d56Sopenharmony_ci 307db96d56Sopenharmony_ci// Py_IS_NAN(X) 317db96d56Sopenharmony_ci// Return 1 if float or double arg is a NaN, else 0. 327db96d56Sopenharmony_ci#define Py_IS_NAN(X) isnan(X) 337db96d56Sopenharmony_ci 347db96d56Sopenharmony_ci// Py_IS_INFINITY(X) 357db96d56Sopenharmony_ci// Return 1 if float or double arg is an infinity, else 0. 367db96d56Sopenharmony_ci#define Py_IS_INFINITY(X) isinf(X) 377db96d56Sopenharmony_ci 387db96d56Sopenharmony_ci// Py_IS_FINITE(X) 397db96d56Sopenharmony_ci// Return 1 if float or double arg is neither infinite nor NAN, else 0. 407db96d56Sopenharmony_ci#define Py_IS_FINITE(X) isfinite(X) 417db96d56Sopenharmony_ci 427db96d56Sopenharmony_ci/* HUGE_VAL is supposed to expand to a positive double infinity. Python 437db96d56Sopenharmony_ci * uses Py_HUGE_VAL instead because some platforms are broken in this 447db96d56Sopenharmony_ci * respect. We used to embed code in pyport.h to try to worm around that, 457db96d56Sopenharmony_ci * but different platforms are broken in conflicting ways. If you're on 467db96d56Sopenharmony_ci * a platform where HUGE_VAL is defined incorrectly, fiddle your Python 477db96d56Sopenharmony_ci * config to #define Py_HUGE_VAL to something that works on your platform. 487db96d56Sopenharmony_ci */ 497db96d56Sopenharmony_ci#ifndef Py_HUGE_VAL 507db96d56Sopenharmony_ci# define Py_HUGE_VAL HUGE_VAL 517db96d56Sopenharmony_ci#endif 527db96d56Sopenharmony_ci 537db96d56Sopenharmony_ci// Py_NAN: Value that evaluates to a quiet Not-a-Number (NaN). 547db96d56Sopenharmony_ci#if !defined(Py_NAN) 557db96d56Sopenharmony_ci# if _Py__has_builtin(__builtin_nan) 567db96d56Sopenharmony_ci // Built-in implementation of the ISO C99 function nan(): quiet NaN. 577db96d56Sopenharmony_ci# define Py_NAN (__builtin_nan("")) 587db96d56Sopenharmony_ci#else 597db96d56Sopenharmony_ci // Use C99 NAN constant: quiet Not-A-Number. 607db96d56Sopenharmony_ci // NAN is a float, Py_NAN is a double: cast to double. 617db96d56Sopenharmony_ci# define Py_NAN ((double)NAN) 627db96d56Sopenharmony_ci# endif 637db96d56Sopenharmony_ci#endif 647db96d56Sopenharmony_ci 657db96d56Sopenharmony_ci#endif /* Py_PYMATH_H */ 66