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). */
44 /* The `const' keyword tells GCC that a function's return value is
45 based solely on its arguments, and there are no side-effects. */
46 #define __CONSTVALUE __const
50 #endif /* __CONSTVALUE not defined. */
53 /* Trigonometric functions. */
55 /* Arc cosine of X. */
56 extern __CONSTVALUE double acos __P ((double __x));
58 extern __CONSTVALUE double asin __P ((double __x));
59 /* Arc tangent of X. */
60 extern __CONSTVALUE double atan __P ((double __x));
61 /* Arc tangent of Y/X. */
62 extern __CONSTVALUE double atan2 __P ((double __y, double __x));
65 extern __CONSTVALUE double cos __P ((double __x));
67 extern __CONSTVALUE double sin __P ((double __x));
69 extern __CONSTVALUE double tan __P ((double __x));
72 /* Hyperbolic functions. */
74 /* Hyperbolic cosine of X. */
75 extern __CONSTVALUE double cosh __P ((double __x));
76 /* Hyperbolic sine of X. */
77 extern __CONSTVALUE double sinh __P ((double __x));
78 /* Hyperbolic tangent of X. */
79 extern __CONSTVALUE double tanh __P ((double __x));
82 /* Hyperbolic arc cosine of X. */
83 extern __CONSTVALUE double acosh __P ((double __x));
84 /* Hyperbolic arc sine of X. */
85 extern __CONSTVALUE double asinh __P ((double __x));
86 /* Hyperbolic arc tangent of X. */
87 extern __CONSTVALUE double atanh __P ((double __x));
90 /* Exponential and logarithmic functions. */
92 /* Exponentional function of X. */
93 extern __CONSTVALUE double exp __P ((double __x));
95 /* Break VALUE into a normalized fraction and an integral power of 2. */
96 extern double frexp __P ((double __value, int *__exp));
98 /* X times (two to the EXP power). */
99 extern __CONSTVALUE double ldexp __P ((double __x, int __exp));
101 /* Natural logarithm of X. */
102 extern __CONSTVALUE double log __P ((double __x));
104 /* Base-ten logarithm of X. */
105 extern __CONSTVALUE double log10 __P ((double __x));
108 /* Return exp(X) - 1. */
109 extern __CONSTVALUE double __expm1 __P ((double __x));
110 extern __CONSTVALUE double expm1 __P ((double __x));
112 /* Return log(1 + X). */
113 extern __CONSTVALUE double log1p __P ((double __x));
116 /* Break VALUE into integral and fractional parts. */
117 extern double modf __P ((double __value, double *__iptr));
120 /* Power functions. */
122 /* Return X to the Y power. */
123 extern __CONSTVALUE double pow __P ((double __x, double __y));
125 /* Return the square root of X. */
126 extern __CONSTVALUE double sqrt __P ((double __x));
129 /* Return the cube root of X. */
130 extern __CONSTVALUE double cbrt __P ((double __x));
134 /* Nearest integer, absolute value, and remainder functions. */
136 /* Smallest integral value not less than X. */
137 extern __CONSTVALUE double ceil __P ((double __x));
139 /* Absolute value of X. */
140 extern __CONSTVALUE double fabs __P ((double __x));
142 /* Largest integer not greater than X. */
143 extern __CONSTVALUE double floor __P ((double __x));
145 /* Floating-point modulo remainder of X/Y. */
146 extern __CONSTVALUE double fmod __P ((double __x, double __y));
149 /* Return 0 if VALUE is finite or NaN, +1 if it
150 is +Infinity, -1 if it is -Infinity. */
151 extern __CONSTVALUE int __isinf __P ((double __value));
153 /* Return nonzero if VALUE is not a number. */
154 extern __CONSTVALUE int __isnan __P ((double __value));
156 /* Return nonzero if VALUE is finite and not NaN. */
157 extern __CONSTVALUE int __finite __P ((double __value));
159 #define __finite(value) (!__isinf(value))
162 /* Deal with an infinite or NaN result.
163 If ERROR is ERANGE, result is +Inf;
164 if ERROR is - ERANGE, result is -Inf;
165 otherwise result is NaN.
166 This will set `errno' to either ERANGE or EDOM,
167 and may return an infinity or NaN, or may do something else. */
168 extern double __infnan __P ((int __error));
170 /* Return X with its signed changed to Y's. */
171 extern __CONSTVALUE double __copysign __P ((double __x, double __y));
173 /* Return X times (2 to the Nth power). */
174 extern __CONSTVALUE double __scalb __P ((double __x, int __n));
177 #define __scalb(x, n) ldexp ((x), (n))
180 /* Return the remainder of X/Y. */
181 extern __CONSTVALUE double __drem __P ((double __x, double __y));
183 /* Return the base 2 signed integral exponent of X. */
184 extern __CONSTVALUE double __logb __P ((double __x));
188 /* Return the integer nearest X in the direction of the
189 prevailing rounding mode. */
190 extern __CONSTVALUE double __rint __P ((double __x));
191 extern __CONSTVALUE double rint __P ((double __x));
193 /* Return `sqrt(X*X + Y*Y)'. */
194 extern __CONSTVALUE double hypot __P ((double __x, double __y));
196 struct __cabs_complex
201 /* Return `sqrt(X*X + Y*Y)'. */
202 extern __CONSTVALUE double cabs __P ((struct __cabs_complex));
204 extern __CONSTVALUE int isinf __P ((double __value));
205 extern __CONSTVALUE int isnan __P ((double __value));
206 extern __CONSTVALUE int finite __P ((double __value));
207 extern __CONSTVALUE double infnan __P ((int __error));
208 extern __CONSTVALUE double copysign __P ((double __x, double __y));
209 extern __CONSTVALUE double scalb __P ((double __x, int __n));
210 extern __CONSTVALUE double drem __P ((double __x, double __y));
211 extern __CONSTVALUE double logb __P ((double __x));
214 #define isinf(value) __isinf(value)
215 #define isnan(value) __isnan(value)
216 #define infnan(error) __infnan(error)
217 #define finite(value) __finite(value)
218 #define copysign(x, y) __copysign((x), (y))
219 #define scalb(x, n) __scalb((x), (n))
220 #define drem(x, y) __drem((x), (y))
221 #define logb(x) __logb(x)
222 #endif /* Optimizing. */
224 #endif /* Use misc. */
228 /* The "Future Library Directions" section of the
229 ANSI Standard reserves these as `float' and
230 `long double' versions of the above functions. */
232 extern __CONSTVALUE float acosf __P ((float __x));
233 extern __CONSTVALUE float asinf __P ((float __x));
234 extern __CONSTVALUE float atanf __P ((float __x));
235 extern __CONSTVALUE float atan2f __P ((float __y, float __x));
236 extern __CONSTVALUE float cosf __P ((float __x));
237 extern __CONSTVALUE float sinf __P ((float __x));
238 extern __CONSTVALUE float tanf __P ((float __x));
239 extern __CONSTVALUE float coshf __P ((float __x));
240 extern __CONSTVALUE float sinhf __P ((float __x));
241 extern __CONSTVALUE float tanhf __P ((float __x));
242 extern __CONSTVALUE float expf __P ((float __x));
243 extern float frexpf __P ((float __value, int *__exp));
244 extern __CONSTVALUE float ldexpf __P ((float __x, int __exp));
245 extern __CONSTVALUE float logf __P ((float __x));
246 extern __CONSTVALUE float log10f __P ((float __x));
247 extern float modff __P ((float __value, float *__iptr));
248 extern __CONSTVALUE float powf __P ((float __x, float __y));
249 extern __CONSTVALUE float sqrtf __P ((float __x));
250 extern __CONSTVALUE float ceilf __P ((float __x));
251 extern __CONSTVALUE float fabsf __P ((float __x));
252 extern __CONSTVALUE float floorf __P ((float __x));
253 extern __CONSTVALUE float fmodf __P ((float __x, float __y));
255 extern __CONSTVALUE __long_double_t acosl __P ((__long_double_t __x));
256 extern __CONSTVALUE __long_double_t asinl __P ((__long_double_t __x));
257 extern __CONSTVALUE __long_double_t atanl __P ((__long_double_t __x));
258 extern __CONSTVALUE __long_double_t atan2l __P ((__long_double_t __y, __long_double_t __x));
259 extern __CONSTVALUE __long_double_t cosl __P ((__long_double_t __x));
260 extern __CONSTVALUE __long_double_t sinl __P ((__long_double_t __x));
261 extern __CONSTVALUE __long_double_t tanl __P ((__long_double_t __x));
262 extern __CONSTVALUE __long_double_t coshl __P ((__long_double_t __x));
263 extern __CONSTVALUE __long_double_t sinhl __P ((__long_double_t __x));
264 extern __CONSTVALUE __long_double_t tanhl __P ((__long_double_t __x));
265 extern __CONSTVALUE __long_double_t expl __P ((__long_double_t __x));
266 extern __long_double_t frexpl __P ((__long_double_t __value, int *__exp));
267 extern __CONSTVALUE __long_double_t ldexpl __P ((__long_double_t __x, int __exp));
268 extern __CONSTVALUE __long_double_t logl __P ((__long_double_t __x));
269 extern __CONSTVALUE __long_double_t log10l __P ((__long_double_t __x));
270 extern __long_double_t modfl __P ((__long_double_t __value, __long_double_t * __ip));
271 extern __CONSTVALUE __long_double_t powl __P ((__long_double_t __x, __long_double_t __y));
272 extern __CONSTVALUE __long_double_t sqrtl __P ((__long_double_t __x));
273 extern __CONSTVALUE __long_double_t ceill __P ((__long_double_t __x));
274 extern __CONSTVALUE __long_double_t fabsl __P ((__long_double_t __x));
275 extern __CONSTVALUE __long_double_t floorl __P ((__long_double_t __x));
276 extern __CONSTVALUE __long_double_t fmodl __P ((__long_double_t __x, __long_double_t __y));
279 /* Get machine-dependent inline versions (if there are any). */