math.h revision 1.8
1 /* 2 * ==================================================== 3 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. 4 * 5 * Developed at SunPro, a Sun Microsystems, Inc. business. 6 * Permission to use, copy, modify, and distribute this 7 * software is freely granted, provided that this notice 8 * is preserved. 9 * ==================================================== 10 */ 11 12 /* 13 * from: @(#)fdlibm.h 5.1 93/09/24 14 * $Id: math.h,v 1.8 1994/03/01 17:16:19 jtc Exp $ 15 */ 16 17 #ifndef _MATH_H_ 18 #define _MATH_H_ 19 20 /* 21 * ANSI/POSIX 22 */ 23 extern char __infinity[]; 24 #define HUGE_VAL (*(double *) __infinity) 25 26 /* 27 * XOPEN/SVID 28 */ 29 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 30 #define M_E 2.7182818284590452354 /* e */ 31 #define M_LOG2E 1.4426950408889634074 /* log 2e */ 32 #define M_LOG10E 0.43429448190325182765 /* log 10e */ 33 #define M_LN2 0.69314718055994530942 /* log e2 */ 34 #define M_LN10 2.30258509299404568402 /* log e10 */ 35 #define M_PI 3.14159265358979323846 /* pi */ 36 #define M_PI_2 1.57079632679489661923 /* pi/2 */ 37 #define M_PI_4 0.78539816339744830962 /* pi/4 */ 38 #define M_1_PI 0.31830988618379067154 /* 1/pi */ 39 #define M_2_PI 0.63661977236758134308 /* 2/pi */ 40 #define M_2_SQRTPI 1.12837916709551257390 /* 2/sqrt(pi) */ 41 #define M_SQRT2 1.41421356237309504880 /* sqrt(2) */ 42 #define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ 43 44 #define MAXFLOAT ((float)3.40282346638528860e+38) 45 extern int signgam; 46 47 #if !defined(_XOPEN_SOURCE) 48 enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix}; 49 50 #define _LIB_VERSION_TYPE enum fdversion 51 #define _LIB_VERSION _fdlib_version 52 53 /* if global variable _LIB_VERSION is not desirable, one may 54 * change the following to be a constant by: 55 * #define _LIB_VERSION_TYPE const enum version 56 * In that case, after one initializes the value _LIB_VERSION (see 57 * s_lib_version.c) during compile time, it cannot be modified 58 * in the middle of a program 59 */ 60 extern _LIB_VERSION_TYPE _LIB_VERSION; 61 62 #define _IEEE_ fdlibm_ieee 63 #define _SVID_ fdlibm_svid 64 #define _XOPEN_ fdlibm_xopen 65 #define _POSIX_ fdlibm_posix 66 67 struct exception { 68 int type; 69 char *name; 70 double arg1; 71 double arg2; 72 double retval; 73 }; 74 75 #define HUGE MAXFLOAT 76 77 /* 78 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h> 79 * (one may replace the following line by "#include <values.h>") 80 */ 81 82 #define X_TLOSS 1.41484755040568800000e+16 83 84 #define DOMAIN 1 85 #define SING 2 86 #define OVERFLOW 3 87 #define UNDERFLOW 4 88 #define TLOSS 5 89 #define PLOSS 6 90 91 #endif /* !_XOPEN_SOURCE */ 92 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 93 94 95 #include <sys/cdefs.h> 96 __BEGIN_DECLS 97 /* 98 * ANSI/POSIX 99 */ 100 extern double acos __P((double)); 101 extern double asin __P((double)); 102 extern double atan __P((double)); 103 extern double atan2 __P((double, double)); 104 extern double cos __P((double)); 105 extern double sin __P((double)); 106 extern double tan __P((double)); 107 108 extern double cosh __P((double)); 109 extern double sinh __P((double)); 110 extern double tanh __P((double)); 111 112 extern double exp __P((double)); 113 extern double frexp __P((double, int *)); 114 extern double ldexp __P((double, int)); 115 extern double log __P((double)); 116 extern double log10 __P((double)); 117 extern double modf __P((double, double *)); 118 119 extern double pow __P((double, double)); 120 extern double sqrt __P((double)); 121 122 extern double ceil __P((double)); 123 extern double fabs __P((double)); 124 extern double floor __P((double)); 125 extern double fmod __P((double, double)); 126 127 #if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE) 128 extern double erf __P((double)); 129 extern double erfc __P((double)); 130 extern double gamma __P((double)); 131 extern double hypot __P((double, double)); 132 extern int isinf __P((double)); 133 extern int isnan __P((double)); 134 extern int finite __P((double)); 135 extern double j0 __P((double)); 136 extern double j1 __P((double)); 137 extern double jn __P((int, double)); 138 extern double lgamma __P((double)); 139 extern double y0 __P((double)); 140 extern double y1 __P((double)); 141 extern double yn __P((int, double)); 142 143 #if !defined(_XOPEN_SOURCE) 144 extern double acosh __P((double)); 145 extern double asinh __P((double)); 146 extern double atanh __P((double)); 147 extern double cbrt __P((double)); 148 extern double logb __P((double)); 149 extern double nextafter __P((double, double)); 150 extern double remainder __P((double, double)); 151 extern double scalb __P((double, double)); 152 153 extern int matherr __P((struct exception *)); 154 155 /* 156 * IEEE Test Vector 157 */ 158 extern double significand __P((double)); 159 160 /* 161 * Functions callable from C, intended to support IEEE arithmetic. 162 */ 163 extern double copysign __P((double, double)); 164 extern int ilogb __P((double)); 165 extern double rint __P((double)); 166 extern double scalbn __P((double, int)); 167 168 /* 169 * BSD math library entry points 170 */ 171 extern double cabs(); 172 extern double drem __P((double, double)); 173 extern double expm1 __P((double)); 174 extern double log1p __P((double)); 175 176 /* 177 * Reentrant version of gamma & lgamma; passes signgam back by reference 178 * as the second argument; user must allocate space for signgam. 179 */ 180 #ifdef _REENTRANT 181 extern double gamma_r __P((double, int *)); 182 extern double lgamma_r __P((double, int *)); 183 #endif /* _REENTRANT */ 184 #endif /* !_XOPEN_SOURCE */ 185 #endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */ 186 187 /* ieee style elementary functions */ 188 extern double __ieee754_sqrt __P((double)); 189 extern double __ieee754_acos __P((double)); 190 extern double __ieee754_acosh __P((double)); 191 extern double __ieee754_log __P((double)); 192 extern double __ieee754_atanh __P((double)); 193 extern double __ieee754_asin __P((double)); 194 extern double __ieee754_atan2 __P((double,double)); 195 extern double __ieee754_exp __P((double)); 196 extern double __ieee754_cosh __P((double)); 197 extern double __ieee754_fmod __P((double,double)); 198 extern double __ieee754_pow __P((double,double)); 199 extern double __ieee754_lgamma_r __P((double,int *)); 200 extern double __ieee754_gamma_r __P((double,int *)); 201 extern double __ieee754_lgamma __P((double)); 202 extern double __ieee754_gamma __P((double)); 203 extern double __ieee754_log10 __P((double)); 204 extern double __ieee754_sinh __P((double)); 205 extern double __ieee754_hypot __P((double,double)); 206 extern double __ieee754_j0 __P((double)); 207 extern double __ieee754_j1 __P((double)); 208 extern double __ieee754_y0 __P((double)); 209 extern double __ieee754_y1 __P((double)); 210 extern double __ieee754_jn __P((int,double)); 211 extern double __ieee754_yn __P((int,double)); 212 extern double __ieee754_remainder __P((double,double)); 213 extern int __ieee754_rem_pio2 __P((double,double*)); 214 extern double __ieee754_scalb __P((double,double)); 215 216 /* fdlibm kernel function */ 217 extern double __kernel_standard __P((double,double,int)); 218 extern double __kernel_sin __P((double,double,int)); 219 extern double __kernel_cos __P((double,double)); 220 extern double __kernel_tan __P((double,double,int)); 221 extern int __kernel_rem_pio2 __P((double*,double*,int,int,int,const int*)); 222 __END_DECLS 223 224 #endif /* _MATH_H_ */ 225
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