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math_bsd.h
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1994-02-25
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848b
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32 lines
/* math_bsd.h
A UNIX emulation library for OSK
*/
/* Constants used in BSD math.h */
#define M_LN2 0.69314718055994530942
#define M_PI 3.14159265358979323846
#define M_SQRT2 1.41421356237309504880
#define M_E 2.7182818284590452354
#define M_LOG2E 1.4426950408889634074
#define M_LOG10E 0.43429448190325182765
#define M_LN10 2.30258509299404568402
#define M_PI_2 1.57079632679489661923
#define M_PI_4 0.78539816339744830962
#define M_1_PI 0.31830988618379067154
#define M_2_PI 0.63661977236758134308
#define M_2_SQRTPI 1.12837916709551257390
#define M_SQRT1_2 0.70710678118654752440
/* Functions in UNIX math.h missing in OSK */
#define copysign(N,S) ((S<0)?((N<0)? N : -(N)):(N<0)? -(N) : N)
#define atan2(Y,X) (double)((Y==0)?((X>=0)?0:M_PI):((X==0)?\
(copysign(M_PI_2,Y)):((X<0)?(copysign(M_PI,Y)-atan(Y/-(X))):\
atan(Y/X))))