math.h
上传用户:poi891205
上传日期:2013-07-15
资源大小:9745k
文件大小:8k
- /* math.h -- Definitions for the math floating point package. */
- #ifndef _MATH_H_
- #ifdef __cplusplus
- extern "C" {
- #endif
- #define _MATH_H_
- #include <sys/reent.h>
- #include <machine/ieeefp.h>
- #include "_ansi.h"
- #ifndef HUGE_VAL
- /* Define HUGE_VAL as infinity, unless HUGE_VAL is already defined
- (which might have been done by something like math-68881.h). */
- union __dmath
- {
- __uint32_t i[2];
- double d;
- };
- extern const union __dmath __infinity;
- #define HUGE_VAL (__infinity.d)
- #endif /* ! defined (HUGE_VAL) */
- /* Reentrant ANSI C functions. */
- #ifndef __math_68881
- extern double atan _PARAMS((double));
- extern double cos _PARAMS((double));
- extern double sin _PARAMS((double));
- extern double tan _PARAMS((double));
- extern double tanh _PARAMS((double));
- extern double frexp _PARAMS((double, int *));
- extern double modf _PARAMS((double, double *));
- extern double ceil _PARAMS((double));
- extern double fabs _PARAMS((double));
- extern double floor _PARAMS((double));
- #endif /* ! defined (__math_68881) */
- /* Non reentrant ANSI C functions. */
- #ifndef _REENT_ONLY
- #ifndef __math_6881
- extern double acos _PARAMS((double));
- extern double asin _PARAMS((double));
- extern double atan2 _PARAMS((double, double));
- extern double cosh _PARAMS((double));
- extern double sinh _PARAMS((double));
- extern double exp _PARAMS((double));
- extern double ldexp _PARAMS((double, int));
- extern double log _PARAMS((double));
- extern double log10 _PARAMS((double));
- extern double pow _PARAMS((double, double));
- extern double sqrt _PARAMS((double));
- extern double fmod _PARAMS((double, double));
- #endif /* ! defined (__math_68881) */
- #endif /* ! defined (_REENT_ONLY) */
- #ifndef _STRICT_ANSI
- /* Non ANSI double precision functions. */
- extern double infinity _PARAMS((void));
- extern double nan _PARAMS((void));
- extern int isnan _PARAMS((double));
- extern int isinf _PARAMS((double));
- extern int finite _PARAMS((double));
- extern double copysign _PARAMS((double, double));
- extern int ilogb _PARAMS((double));
- extern double asinh _PARAMS((double));
- extern double cbrt _PARAMS((double));
- extern double nextafter _PARAMS((double, double));
- extern double rint _PARAMS((double));
- extern double scalbn _PARAMS((double, int));
- #ifndef __math_68881
- extern double log1p _PARAMS((double));
- extern double expm1 _PARAMS((double));
- #endif /* ! defined (__math_68881) */
- #ifndef _REENT_ONLY
- extern double acosh _PARAMS((double));
- extern double atanh _PARAMS((double));
- extern double remainder _PARAMS((double, double));
- extern double gamma _PARAMS((double));
- extern double gamma_r _PARAMS((double, int *));
- extern double lgamma _PARAMS((double));
- extern double lgamma_r _PARAMS((double, int *));
- extern double erf _PARAMS((double));
- extern double erfc _PARAMS((double));
- extern double y0 _PARAMS((double));
- extern double y1 _PARAMS((double));
- extern double yn _PARAMS((int, double));
- extern double j0 _PARAMS((double));
- extern double j1 _PARAMS((double));
- extern double jn _PARAMS((int, double));
- #define log2(x) (log (x) / M_LOG2_E)
- #ifndef __math_68881
- extern double hypot _PARAMS((double, double));
- #endif
- extern double cabs();
- extern double drem _PARAMS((double, double));
- #endif /* ! defined (_REENT_ONLY) */
- /* Single precision versions of ANSI functions. */
- extern float atanf _PARAMS((float));
- extern float cosf _PARAMS((float));
- extern float sinf _PARAMS((float));
- extern float tanf _PARAMS((float));
- extern float tanhf _PARAMS((float));
- extern float frexpf _PARAMS((float, int *));
- extern float modff _PARAMS((float, float *));
- extern float ceilf _PARAMS((float));
- extern float fabsf _PARAMS((float));
- extern float floorf _PARAMS((float));
- #ifndef _REENT_ONLY
- extern float acosf _PARAMS((float));
- extern float asinf _PARAMS((float));
- extern float atan2f _PARAMS((float, float));
- extern float coshf _PARAMS((float));
- extern float sinhf _PARAMS((float));
- extern float expf _PARAMS((float));
- extern float ldexpf _PARAMS((float, int));
- extern float logf _PARAMS((float));
- extern float log10f _PARAMS((float));
- extern float powf _PARAMS((float, float));
- extern float sqrtf _PARAMS((float));
- extern float fmodf _PARAMS((float, float));
- #endif /* ! defined (_REENT_ONLY) */
- /* Other single precision functions. */
- extern float infinityf _PARAMS((void));
- extern float nanf _PARAMS((void));
- extern int isnanf _PARAMS((float));
- extern int isinff _PARAMS((float));
- extern int finitef _PARAMS((float));
- extern float copysignf _PARAMS((float, float));
- extern int ilogbf _PARAMS((float));
- extern float asinhf _PARAMS((float));
- extern float cbrtf _PARAMS((float));
- extern float nextafterf _PARAMS((float, float));
- extern float rintf _PARAMS((float));
- extern float scalbnf _PARAMS((float, int));
- extern float log1pf _PARAMS((float));
- extern float expm1f _PARAMS((float));
- #ifndef _REENT_ONLY
- extern float acoshf _PARAMS((float));
- extern float atanhf _PARAMS((float));
- extern float remainderf _PARAMS((float, float));
- extern float gammaf _PARAMS((float));
- extern float gammaf_r _PARAMS((float, int *));
- extern float lgammaf _PARAMS((float));
- extern float lgammaf_r _PARAMS((float, int *));
- extern float erff _PARAMS((float));
- extern float erfcf _PARAMS((float));
- extern float y0f _PARAMS((float));
- extern float y1f _PARAMS((float));
- extern float ynf _PARAMS((int, float));
- extern float j0f _PARAMS((float));
- extern float j1f _PARAMS((float));
- extern float jnf _PARAMS((int, float));
- #define log2f(x) (logf (x) / (float) M_LOG2_E)
- extern float hypotf _PARAMS((float, float));
- extern float cabsf();
- extern float dremf _PARAMS((float, float));
- #endif /* ! defined (_REENT_ONLY) */
- /* The gamma functions use a global variable, signgam. */
- extern int signgam;
- /* The exception structure passed to the matherr routine. */
- #ifdef __cplusplus
- struct __exception
- #else
- struct exception
- #endif
- {
- int type;
- char *name;
- double arg1;
- double arg2;
- double retval;
- int err;
- };
- #ifdef __cplusplus
- extern int matherr _PARAMS((struct __exception *e));
- #else
- extern int matherr _PARAMS((struct exception *e));
- #endif
- /* Values for the type field of struct exception. */
- #define DOMAIN 1
- #define SING 2
- #define OVERFLOW 3
- #define UNDERFLOW 4
- #define TLOSS 5
- #define PLOSS 6
- /* Useful constants. */
- #define M_E 2.7182818284590452354
- #define M_LOG2E 1.4426950408889634074
- #define M_LOG10E 0.43429448190325182765
- #define M_LN2 0.69314718055994530942
- #define M_LN10 2.30258509299404568402
- #define M_PI 3.14159265358979323846
- #define M_TWOPI (M_PI * 2.0)
- #define M_PI_2 1.57079632679489661923
- #define M_PI_4 0.78539816339744830962
- #define M_3PI_4 2.3561944901923448370E0
- #define M_SQRTPI 1.77245385090551602792981
- #define M_1_PI 0.31830988618379067154
- #define M_2_PI 0.63661977236758134308
- #define M_2_SQRTPI 1.12837916709551257390
- #define M_SQRT2 1.41421356237309504880
- #define M_SQRT1_2 0.70710678118654752440
- #define M_LN2LO 1.9082149292705877000E-10
- #define M_LN2HI 6.9314718036912381649E-1
- #define M_SQRT3 1.73205080756887719000
- #define M_IVLN10 0.43429448190325182765 /* 1 / log(10) */
- #define M_LOG2_E 0.693147180559945309417
- #define M_INVLN2 1.4426950408889633870E0 /* 1 / log(2) */
- /* Global control over fdlibm error handling. */
- enum __fdlibm_version
- {
- __fdlibm_ieee = -1,
- __fdlibm_svid,
- __fdlibm_xopen,
- __fdlibm_posix
- };
- #define _LIB_VERSION_TYPE enum __fdlibm_version
- #define _LIB_VERSION __fdlib_version
- extern _LIB_VERSION_TYPE _LIB_VERSION;
- #define _IEEE_ __fdlibm_ieee
- #define _SVID_ __fdlibm_svid
- #define _XOPEN_ __fdlibm_xopen
- #define _POSIX_ __fdlibm_posix
- #endif /* ! defined (_STRICT_ANSI) */
- #ifdef __cplusplus
- }
- #endif
- #endif /* _MATH_H_ */