math.h revision 1.10 
1/*	$OpenBSD: math.h,v 1.10 2005/11/17 20:07:40 otto Exp $	*/
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13/*
14 * from: @(#)fdlibm.h 5.1 93/09/24
15 */
16
17#ifndef _MATH_H_
18#define _MATH_H_
19
20/*
21 * ANSI/POSIX
22 */
23extern char __infinity[];
24#define HUGE_VAL	(*(double *) __infinity)
25
26/*
27 * C99
28 */
29
30/* XXX just appease the committee for now, needs proper defs... */
31
32typedef float float_t;
33typedef double double_t;
34#define FLT_EVAL_METHOD (-1)
35
36/*
37 * XOPEN/SVID
38 */
39#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
40#define	M_E		2.7182818284590452354	/* e */
41#define	M_LOG2E		1.4426950408889634074	/* log 2e */
42#define	M_LOG10E	0.43429448190325182765	/* log 10e */
43#define	M_LN2		0.69314718055994530942	/* log e2 */
44#define	M_LN10		2.30258509299404568402	/* log e10 */
45#define	M_PI		3.14159265358979323846	/* pi */
46#define	M_PI_2		1.57079632679489661923	/* pi/2 */
47#define	M_PI_4		0.78539816339744830962	/* pi/4 */
48#define	M_1_PI		0.31830988618379067154	/* 1/pi */
49#define	M_2_PI		0.63661977236758134308	/* 2/pi */
50#define	M_2_SQRTPI	1.12837916709551257390	/* 2/sqrt(pi) */
51#define	M_SQRT2		1.41421356237309504880	/* sqrt(2) */
52#define	M_SQRT1_2	0.70710678118654752440	/* 1/sqrt(2) */
53
54#ifdef __vax__
55#define	MAXFLOAT        ((float)1.70141173319264430e+38)
56#else
57#define	MAXFLOAT	((float)3.40282346638528860e+38)
58#endif
59
60extern int signgam;
61
62#if !defined(_XOPEN_SOURCE)
63enum fdversion {fdlibm_ieee = -1, fdlibm_svid, fdlibm_xopen, fdlibm_posix};
64
65#define _LIB_VERSION_TYPE enum fdversion
66#define _LIB_VERSION _fdlib_version
67
68/* if global variable _LIB_VERSION is not desirable, one may
69 * change the following to be a constant by:
70 *	#define _LIB_VERSION_TYPE const enum version
71 * In that case, after one initializes the value _LIB_VERSION (see
72 * s_lib_version.c) during compile time, it cannot be modified
73 * in the middle of a program
74 */
75extern  _LIB_VERSION_TYPE  _LIB_VERSION;
76
77#define _IEEE_  fdlibm_ieee
78#define _SVID_  fdlibm_svid
79#define _XOPEN_ fdlibm_xopen
80#define _POSIX_ fdlibm_posix
81
82#ifndef __cplusplus
83struct exception {
84	int type;
85	char *name;
86	double arg1;
87	double arg2;
88	double retval;
89};
90#endif
91
92#define	HUGE		MAXFLOAT
93
94/*
95 * set X_TLOSS = pi*2**52, which is possibly defined in <values.h>
96 * (one may replace the following line by "#include <values.h>")
97 */
98
99#define X_TLOSS		1.41484755040568800000e+16
100
101#define	DOMAIN		1
102#define	SING		2
103#define	OVERFLOW	3
104#define	UNDERFLOW	4
105#define	TLOSS		5
106#define	PLOSS		6
107
108#endif /* !_XOPEN_SOURCE */
109#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
110
111
112#include <sys/cdefs.h>
113__BEGIN_DECLS
114/*
115 * ANSI/POSIX
116 */
117extern double acos(double);
118extern double asin(double);
119extern double atan(double);
120extern double atan2(double, double);
121extern double cos(double);
122extern double sin(double);
123extern double tan(double);
124
125extern double cosh(double);
126extern double sinh(double);
127extern double tanh(double);
128
129extern double exp(double);
130extern double frexp(double, int *);
131extern double ldexp(double, int);
132extern double log(double);
133extern double log10(double);
134extern double modf(double, double *);
135
136extern double pow(double, double);
137extern double sqrt(double);
138
139extern double ceil(double);
140extern double fabs(double);
141extern double floor(double);
142extern double fmod(double, double);
143
144#if !defined(_ANSI_SOURCE) && !defined(_POSIX_SOURCE)
145extern double erf(double);
146extern double erfc(double);
147extern double gamma(double);
148extern double hypot(double, double);
149extern int isinf(double);
150extern int isnan(double);
151extern int finite(double);
152extern double j0(double);
153extern double j1(double);
154extern double jn(int, double);
155extern double lgamma(double);
156extern double y0(double);
157extern double y1(double);
158extern double yn(int, double);
159
160#if !defined(_XOPEN_SOURCE)
161extern double acosh(double);
162extern double asinh(double);
163extern double atanh(double);
164extern double cbrt(double);
165extern double logb(double);
166extern double nextafter(double, double);
167extern double remainder(double, double);
168extern double scalb(double, double);
169
170#ifdef __LIBM_PRIVATE
171extern int matherr(struct exception *);
172#endif
173
174/*
175 * IEEE Test Vector
176 */
177extern double significand(double);
178
179/*
180 * Functions callable from C, intended to support IEEE arithmetic.
181 */
182extern double copysign(double, double);
183extern int ilogb(double);
184extern double rint(double);
185extern long int lrint(double);
186extern long int lround(double);
187extern long long int llrint(double);
188extern long long int llround(double);
189extern double scalbn(double, int);
190
191/*
192 * BSD math library entry points
193 */
194extern double cabs();
195extern double drem(double, double);
196extern double expm1(double);
197extern double log1p(double);
198
199/*
200 * Reentrant version of gamma & lgamma; passes signgam back by reference
201 * as the second argument; user must allocate space for signgam.
202 */
203#ifdef _REENTRANT
204extern double gamma_r(double, int *);
205extern double lgamma_r(double, int *);
206#endif /* _REENTRANT */
207
208
209/* float versions of ANSI/POSIX functions */
210extern float acosf(float);
211extern float asinf(float);
212extern float atanf(float);
213extern float atan2f(float, float);
214extern float cosf(float);
215extern float sinf(float);
216extern float tanf(float);
217
218extern float coshf(float);
219extern float sinhf(float);
220extern float tanhf(float);
221
222extern float expf(float);
223extern float frexpf(float, int *);
224extern float ldexpf(float, int);
225extern float logf(float);
226extern float log10f(float);
227extern float modff(float, float *);
228
229extern float powf(float, float);
230extern float sqrtf(float);
231
232extern float ceilf(float);
233extern float fabsf(float);
234extern float floorf(float);
235extern float fmodf(float, float);
236
237extern float erff(float);
238extern float erfcf(float);
239extern float gammaf(float);
240extern float hypotf(float, float);
241extern int isinff(float);
242extern int isnanf(float);
243extern int finitef(float);
244extern float j0f(float);
245extern float j1f(float);
246extern float jnf(int, float);
247extern float lgammaf(float);
248extern float y0f(float);
249extern float y1f(float);
250extern float ynf(int, float);
251
252extern float acoshf(float);
253extern float asinhf(float);
254extern float atanhf(float);
255extern float cbrtf(float);
256extern float logbf(float);
257extern float nextafterf(float, float);
258extern float remainderf(float, float);
259extern float scalbf(float, float);
260
261/*
262 * float version of IEEE Test Vector
263 */
264extern float significandf(float);
265
266/*
267 * Float versions of functions callable from C, intended to support
268 * IEEE arithmetic.
269 */
270extern float copysignf(float, float);
271extern int ilogbf(float);
272extern float rintf(float);
273extern long int lrintf(float);
274extern long int lroundf(float);
275extern long long int llrintf(float);
276extern long long int llroundf(float);
277extern float scalbnf(float, int);
278
279/*
280 * float versions of BSD math library entry points
281 */
282extern float cabsf ();
283extern float dremf(float, float);
284extern float expm1f(float);
285extern float log1pf(float);
286
287/*
288 * Float versions of reentrant version of gamma & lgamma; passes
289 * signgam back by reference as the second argument; user must
290 * allocate space for signgam.
291 */
292#ifdef _REENTRANT
293extern float gammaf_r(float, int *);
294extern float lgammaf_r(float, int *);
295#endif	/* _REENTRANT */
296
297#endif /* !_XOPEN_SOURCE */
298#endif /* !_ANSI_SOURCE && !_POSIX_SOURCE */
299__END_DECLS
300
301#endif /* _MATH_H_ */
302