/* Prototype declarations for math functions; helper file for . Copyright (C) 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* NOTE: Because of the special way this file is used by , this file must NOT be protected from multiple inclusion as header files usually are. This file provides prototype declarations for the math functions. Most functions are declared using the macro: __MATHCALL (NAME,[_r], (ARGS...)); This means there is a function `NAME' returning `double' and a function `NAMEf' returning `float'. Each place `_Mdouble_' appears in the prototype, that is actually `double' in the prototype for `NAME' and `float' in the prototype for `NAMEf'. Reentrant variant functions are called `NAME_r' and `NAMEf_r'. Functions returning other types like `int' are declared using the macro: __MATHDECL (TYPE, NAME,[_r], (ARGS...)); This is just like __MATHCALL but for a function returning `TYPE' instead of `_Mdouble_'. In all of these cases, there is still both a `NAME' and a `NAMEf' that takes `float' arguments. */ #ifndef _MATH_H #error "Never include mathcalls.h directly; include instead." #endif /* Trigonometric functions. */ /* Arc cosine of X. */ __MATHCALL (acos,, (_Mdouble_ __x)); /* Arc sine of X. */ __MATHCALL (asin,, (_Mdouble_ __x)); /* Arc tangent of X. */ __MATHCALL (atan,, (_Mdouble_ __x)); /* Arc tangent of Y/X. */ __MATHCALL (atan2,, (_Mdouble_ __y, _Mdouble_ __x)); /* Cosine of X. */ __MATHCALL (cos,, (_Mdouble_ __x)); /* Sine of X. */ __MATHCALL (sin,, (_Mdouble_ __x)); /* Tangent of X. */ __MATHCALL (tan,, (_Mdouble_ __x)); #ifdef __USE_GNU /* Cosine and sine of X. */ __MATHDECL (void, sincos,, (_Mdouble_ __x, _Mdouble_ *__sinx, _Mdouble_ *__cosx)); #endif /* Hyperbolic functions. */ /* Hyperbolic cosine of X. */ __MATHCALL (cosh,, (_Mdouble_ __x)); /* Hyperbolic sine of X. */ __MATHCALL (sinh,, (_Mdouble_ __x)); /* Hyperbolic tangent of X. */ __MATHCALL (tanh,, (_Mdouble_ __x)); #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC9X /* Hyperbolic arc cosine of X. */ __MATHCALL (acosh,, (_Mdouble_ __x)); /* Hyperbolic arc sine of X. */ __MATHCALL (asinh,, (_Mdouble_ __x)); /* Hyperbolic arc tangent of X. */ __MATHCALL (atanh,, (_Mdouble_ __x)); #endif /* Exponential and logarithmic functions. */ /* Exponential function of X. */ __MATHCALL (exp,, (_Mdouble_ __x)); /* Break VALUE into a normalized fraction and an integral power of 2. */ __MATHCALL (frexp,, (_Mdouble_ __x, int *__exponent)); /* X times (two to the EXP power). */ __MATHCALL (ldexp,, (_Mdouble_ __x, int __exponent)); /* Natural logarithm of X. */ __MATHCALL (log,, (_Mdouble_ __x)); /* Base-ten logarithm of X. */ __MATHCALL (log10,, (_Mdouble_ __x)); /* Break VALUE into integral and fractional parts. */ __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)); #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC9X /* Return exp(X) - 1. */ __MATHCALL (expm1,, (_Mdouble_ __x)); /* Return log(1 + X). */ __MATHCALL (log1p,, (_Mdouble_ __x)); /* Return the base 2 signed integral exponent of X. */ __MATHCALL (logb,, (_Mdouble_ __x)); #endif #ifdef __USE_ISOC9X /* Compute base-2 exponential of X. */ __MATHCALL (exp2,, (_Mdouble_ __x)); /* Compute base-2 logarithm of X. */ __MATHCALL (log2,, (_Mdouble_ __x)); #endif /* Power functions. */ /* Return X to the Y power. */ __MATHCALL (pow,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return the square root of X. */ __MATHCALL (sqrt,, (_Mdouble_ __x)); #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC9X /* Return `sqrt(X*X + Y*Y)'. */ __MATHCALL (hypot,, (_Mdouble_ __x, _Mdouble_ __y)); #endif #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED /* Return the cube root of X. */ __MATHCALL (cbrt,, (_Mdouble_ __x)); #endif /* Nearest integer, absolute value, and remainder functions. */ /* Smallest integral value not less than X. */ __MATHCALL (ceil,, (_Mdouble_ __x)); /* Absolute value of X. */ __MATHCALLX (fabs,, (_Mdouble_ __x), (__const__)); /* Largest integer not greater than X. */ __MATHCALL (floor,, (_Mdouble_ __x)); /* Floating-point modulo remainder of X/Y. */ __MATHCALL (fmod,, (_Mdouble_ __x, _Mdouble_ __y)); #ifdef __USE_MISC /* Return 0 if VALUE is finite or NaN, +1 if it is +Infinity, -1 if it is -Infinity. */ __MATHDECLX (int,isinf,, (_Mdouble_ __value), (__const__)); /* Return nonzero if VALUE is finite and not NaN. */ __MATHDECLX (int,finite,, (_Mdouble_ __value), (__const__)); /* Deal with an infinite or NaN result. If ERROR is ERANGE, result is +Inf; if ERROR is - ERANGE, result is -Inf; otherwise result is NaN. This will set `errno' to either ERANGE or EDOM, and may return an infinity or NaN, or may do something else. */ __MATHCALLX (infnan,, (int __error), (__const__)); /* Return X times (2 to the Nth power). */ __MATHCALL (scalbn,, (_Mdouble_ __x, int __n)); /* Return the remainder of X/Y. */ __MATHCALL (drem,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return the fractional part of X after dividing out `ilogb (X)'. */ __MATHCALL (significand,, (_Mdouble_ __x)); #endif /* Use misc. */ #if defined __USE_MISC || defined __USE_ISOC9X /* Return X with its signed changed to Y's. */ __MATHCALLX (copysign,, (_Mdouble_ __x, _Mdouble_ __y), (__const__)); #endif #ifdef __USE_ISOC9X /* Return representation of NaN for double type. */ __MATHCALLX (nan,, (__const char *__tagb), (__const__)); #endif #if defined __USE_MISC || defined __USE_XOPEN /* Return nonzero if VALUE is not a number. */ __MATHDECLX (int,isnan,, (_Mdouble_ __value), (__const__)); /* Return the binary exponent of X, which must be nonzero. */ __MATHDECL (int,ilogb,, (_Mdouble_ __x)); /* Bessel functions. */ __MATHCALL (j0,, (_Mdouble_)); __MATHCALL (j1,, (_Mdouble_)); __MATHCALL (jn,, (int, _Mdouble_)); __MATHCALL (y0,, (_Mdouble_)); __MATHCALL (y1,, (_Mdouble_)); __MATHCALL (yn,, (int, _Mdouble_)); #endif #if defined __USE_MISC || defined __USE_XOPEN || defined __USE_ISOC9X /* Error, gamma, and Bessel functions. */ __MATHCALL (erf,, (_Mdouble_)); __MATHCALL (erfc,, (_Mdouble_)); __MATHCALL (gamma,, (_Mdouble_)); __MATHCALL (lgamma,, (_Mdouble_)); #ifdef __USE_MISC /* Reentrant versions of gamma and lgamma. Those functions use the global variable `signgam'. The reentrant versions instead take a pointer and store the value through it. */ __MATHCALL (gamma,_r, (_Mdouble_, int *)); __MATHCALL (lgamma,_r, (_Mdouble_, int *)); #endif #endif /* Use misc or X/Open. */ #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC9X /* Return the integer nearest X in the direction of the prevailing rounding mode. */ __MATHCALL (rint,, (_Mdouble_ __x)); /* Return X + epsilon if X < Y, X - epsilon if X > Y. */ __MATHCALLX (nextafter,, (_Mdouble_ __x, _Mdouble_ __y), (__const__)); /* Return the remainder of integer divison X / Y with infinite precision. */ __MATHCALL (remainder,, (_Mdouble_ __x, _Mdouble_ __y)); #endif #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED /* Return X times (2 to the Nth power). */ __MATHCALL (scalb,, (_Mdouble_ __x, _Mdouble_ __n)); #endif #ifdef __USE_ISOC9X /* Round X to integral valuein floating-point format using current rounding direction, but do not raise inexact exception. */ __MATHCALL (nearbyint,, (_Mdouble_ __x)); /* Round X to nearest integral value, rounding halfway cases away from zero. */ __MATHCALL (round,, (_Mdouble_ __x)); /* Round X to the integral value in floating-point format nearest but not larger in magnitude. */ __MATHCALLX (trunc,, (_Mdouble_ __x), (__const__)); /* Compute remainder of X and Y and put in *QUO a value with sign of x/y and magnitude congruent `mod 2^n' to the magnitude of the integral quotient x/y, with n >= 3. */ __MATHCALL (remquo,, (_Mdouble_ __x, _Mdouble_ __y, int *__quo)); /* Return positive difference between X and Y. */ __MATHCALL (fdim,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return maximum numeric value from X and Y. */ __MATHCALL (fmax,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return minimum numeric value from X and Y. */ __MATHCALL (fmin,, (_Mdouble_ __x, _Mdouble_ __y)); /* Classify given number. */ __MATHDECL_1 (int, __fpclassify,, (_Mdouble_ __value)) __attribute__ ((__const__)); /* Test for negative number. */ __MATHDECL_1 (int, __signbit,, (_Mdouble_ __value)) __attribute__ ((__const__)); #endif /* Use ISO C 9X. */