1 /* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If
16 not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
20 * ANSI Standard: 4.5 MATHEMATICS <math.h>
33 /* Get machine-dependent HUGE_VAL value (returned on overflow). */
36 /* Get machine-dependent NAN value (returned for some domain errors). */
42 /* Trigonometric functions. */
44 /* Arc cosine of X. */
45 extern __CONSTVALUE double acos __P ((double __x));
47 extern __CONSTVALUE double asin __P ((double __x));
48 /* Arc tangent of X. */
49 extern __CONSTVALUE double atan __P ((double __x));
50 /* Arc tangent of Y/X. */
51 extern __CONSTVALUE double atan2 __P ((double __y, double __x));
54 extern __CONSTVALUE double cos __P ((double __x));
56 extern __CONSTVALUE double sin __P ((double __x));
58 extern __CONSTVALUE double tan __P ((double __x));
61 /* Hyperbolic functions. */
63 /* Hyperbolic cosine of X. */
64 extern __CONSTVALUE double cosh __P ((double __x));
65 /* Hyperbolic sine of X. */
66 extern __CONSTVALUE double sinh __P ((double __x));
67 /* Hyperbolic tangent of X. */
68 extern __CONSTVALUE double tanh __P ((double __x));
71 /* Hyperbolic arc cosine of X. */
72 extern __CONSTVALUE double acosh __P ((double __x));
73 /* Hyperbolic arc sine of X. */
74 extern __CONSTVALUE double asinh __P ((double __x));
75 /* Hyperbolic arc tangent of X. */
76 extern __CONSTVALUE double atanh __P ((double __x));
79 /* Exponential and logarithmic functions. */
81 /* Exponentional function of X. */
82 extern __CONSTVALUE double exp __P ((double __x));
84 /* Break VALUE into a normalized fraction and an integral power of 2. */
85 extern double frexp __P ((double __value, int *__exp));
87 /* X times (two to the EXP power). */
88 extern __CONSTVALUE double ldexp __P ((double __x, int __exp));
90 /* Natural logarithm of X. */
91 extern __CONSTVALUE double log __P ((double __x));
93 /* Base-ten logarithm of X. */
94 extern __CONSTVALUE double log10 __P ((double __x));
97 /* Return exp(X) - 1. */
98 extern __CONSTVALUE double __expm1 __P ((double __x));
99 extern __CONSTVALUE double expm1 __P ((double __x));
101 /* Return log(1 + X). */
102 extern __CONSTVALUE double log1p __P ((double __x));
105 /* Break VALUE into integral and fractional parts. */
106 extern double modf __P ((double __value, double *__iptr));
109 /* Power functions. */
111 /* Return X to the Y power. */
112 extern __CONSTVALUE double pow __P ((double __x, double __y));
114 /* Return the square root of X. */
115 extern __CONSTVALUE double sqrt __P ((double __x));
118 /* Return the cube root of X. */
119 extern __CONSTVALUE double cbrt __P ((double __x));
123 /* Nearest integer, absolute value, and remainder functions. */
125 /* Smallest integral value not less than X. */
126 extern __CONSTVALUE double ceil __P ((double __x));
128 /* Absolute value of X. */
129 extern __CONSTVALUE double fabs __P ((double __x));
131 /* Largest integer not greater than X. */
132 extern __CONSTVALUE double floor __P ((double __x));
134 /* Floating-point modulo remainder of X/Y. */
135 extern __CONSTVALUE double fmod __P ((double __x, double __y));
138 /* Return 0 if VALUE is finite or NaN, +1 if it
139 is +Infinity, -1 if it is -Infinity. */
140 extern __CONSTVALUE int __isinf __P ((double __value));
142 /* Return nonzero if VALUE is not a number. */
143 extern __CONSTVALUE int __isnan __P ((double __value));
145 /* Return nonzero if VALUE is finite and not NaN. */
146 extern __CONSTVALUE int __finite __P ((double __value));
148 #define __finite(value) (!__isinf(value))
151 /* Deal with an infinite or NaN result.
152 If ERROR is ERANGE, result is +Inf;
153 if ERROR is - ERANGE, result is -Inf;
154 otherwise result is NaN.
155 This will set `errno' to either ERANGE or EDOM,
156 and may return an infinity or NaN, or may do something else. */
157 extern double __infnan __P ((int __error));
159 /* Return X with its signed changed to Y's. */
160 extern __CONSTVALUE double __copysign __P ((double __x, double __y));
162 /* Return X times (2 to the Nth power). */
163 extern __CONSTVALUE double __scalb __P ((double __x, int __n));
166 #define __scalb(x, n) ldexp ((x), (n))
169 /* Return the remainder of X/Y. */
170 extern __CONSTVALUE double __drem __P ((double __x, double __y));
172 /* Return the base 2 signed integral exponent of X. */
173 extern __CONSTVALUE double __logb __P ((double __x));
177 /* Return the integer nearest X in the direction of the
178 prevailing rounding mode. */
179 extern __CONSTVALUE double __rint __P ((double __x));
180 extern __CONSTVALUE double rint __P ((double __x));
182 /* Return `sqrt(X*X + Y*Y)'. */
183 extern __CONSTVALUE double hypot __P ((double __x, double __y));
185 struct __cabs_complex
190 /* Return `sqrt(X*X + Y*Y)'. */
191 extern __CONSTVALUE double cabs __P ((struct __cabs_complex));
193 extern __CONSTVALUE int isinf __P ((double __value));
194 extern __CONSTVALUE int isnan __P ((double __value));
195 extern __CONSTVALUE int finite __P ((double __value));
196 extern __CONSTVALUE double infnan __P ((int __error));
197 extern __CONSTVALUE double copysign __P ((double __x, double __y));
198 extern __CONSTVALUE double scalb __P ((double __x, int __n));
199 extern __CONSTVALUE double drem __P ((double __x, double __y));
200 extern __CONSTVALUE double logb __P ((double __x));
203 #define isinf(value) __isinf(value)
204 #define isnan(value) __isnan(value)
205 #define infnan(error) __infnan(error)
206 #define finite(value) __finite(value)
207 #define copysign(x, y) __copysign((x), (y))
208 #define scalb(x, n) __scalb((x), (n))
209 #define drem(x, y) __drem((x), (y))
210 #define logb(x) __logb(x)
211 #endif /* Optimizing. */
213 #endif /* Use misc. */
217 /* The "Future Library Directions" section of the
218 ANSI Standard reserves these as `float' and
219 `long double' versions of the above functions. */
221 extern __CONSTVALUE float acosf __P ((float __x));
222 extern __CONSTVALUE float asinf __P ((float __x));
223 extern __CONSTVALUE float atanf __P ((float __x));
224 extern __CONSTVALUE float atan2f __P ((float __y, float __x));
225 extern __CONSTVALUE float cosf __P ((float __x));
226 extern __CONSTVALUE float sinf __P ((float __x));
227 extern __CONSTVALUE float tanf __P ((float __x));
228 extern __CONSTVALUE float coshf __P ((float __x));
229 extern __CONSTVALUE float sinhf __P ((float __x));
230 extern __CONSTVALUE float tanhf __P ((float __x));
231 extern __CONSTVALUE float expf __P ((float __x));
232 extern float frexpf __P ((float __value, int *__exp));
233 extern __CONSTVALUE float ldexpf __P ((float __x, int __exp));
234 extern __CONSTVALUE float logf __P ((float __x));
235 extern __CONSTVALUE float log10f __P ((float __x));
236 extern float modff __P ((float __value, float *__iptr));
237 extern __CONSTVALUE float powf __P ((float __x, float __y));
238 extern __CONSTVALUE float sqrtf __P ((float __x));
239 extern __CONSTVALUE float ceilf __P ((float __x));
240 extern __CONSTVALUE float fabsf __P ((float __x));
241 extern __CONSTVALUE float floorf __P ((float __x));
242 extern __CONSTVALUE float fmodf __P ((float __x, float __y));
244 extern __CONSTVALUE __long_double_t acosl __P ((__long_double_t __x));
245 extern __CONSTVALUE __long_double_t asinl __P ((__long_double_t __x));
246 extern __CONSTVALUE __long_double_t atanl __P ((__long_double_t __x));
247 extern __CONSTVALUE __long_double_t atan2l __P ((__long_double_t __y, __long_double_t __x));
248 extern __CONSTVALUE __long_double_t cosl __P ((__long_double_t __x));
249 extern __CONSTVALUE __long_double_t sinl __P ((__long_double_t __x));
250 extern __CONSTVALUE __long_double_t tanl __P ((__long_double_t __x));
251 extern __CONSTVALUE __long_double_t coshl __P ((__long_double_t __x));
252 extern __CONSTVALUE __long_double_t sinhl __P ((__long_double_t __x));
253 extern __CONSTVALUE __long_double_t tanhl __P ((__long_double_t __x));
254 extern __CONSTVALUE __long_double_t expl __P ((__long_double_t __x));
255 extern __long_double_t frexpl __P ((__long_double_t __value, int *__exp));
256 extern __CONSTVALUE __long_double_t ldexpl __P ((__long_double_t __x, int __exp));
257 extern __CONSTVALUE __long_double_t logl __P ((__long_double_t __x));
258 extern __CONSTVALUE __long_double_t log10l __P ((__long_double_t __x));
259 extern __long_double_t modfl __P ((__long_double_t __value, __long_double_t * __ip));
260 extern __CONSTVALUE __long_double_t powl __P ((__long_double_t __x, __long_double_t __y));
261 extern __CONSTVALUE __long_double_t sqrtl __P ((__long_double_t __x));
262 extern __CONSTVALUE __long_double_t ceill __P ((__long_double_t __x));
263 extern __CONSTVALUE __long_double_t fabsl __P ((__long_double_t __x));
264 extern __CONSTVALUE __long_double_t floorl __P ((__long_double_t __x));
265 extern __CONSTVALUE __long_double_t fmodl __P ((__long_double_t __x, __long_double_t __y));
268 /* Get machine-dependent inline versions (if there are any). */