/* Prototype declarations for math functions; helper file for . Copyright (C) 1996 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., 675 Mass Ave, Cambridge, MA 02139, 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)); /* 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)); #ifdef __USE_MISC /* 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. */ /* Exponentional function of X. */ __MATHCALL (exp,, (_Mdouble_ __x)); /* Break VALUE into a normalized fraction and an integral power of 2. */ __MATHCALL (frexp,, (_Mdouble_ __value, int *__exp)); /* X times (two to the EXP power). */ __MATHCALL (ldexp,, (_Mdouble_ __x, int __exp)); /* Natural logarithm of X. */ __MATHCALL (log,, (_Mdouble_ __x)); /* Base-ten logarithm of X. */ __MATHCALL (log10,, (_Mdouble_ __x)); #ifdef __USE_MISC /* Return exp(X) - 1. */ __MATHCALL (expm1,, (_Mdouble_ __x)); /* Return log(1 + X). */ __MATHCALL (log1p,, (_Mdouble_ __x)); #endif /* Break VALUE into integral and fractional parts. */ __MATHCALL (modf,, (_Mdouble_ __value, _Mdouble_ *__iptr)); /* Power functions. */ /* Return X to the Y power. */ __MATHCALL (pow,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return the square root of X. */ __MATHCALL (sqrt,, (_Mdouble_ __x)); #ifdef __USE_MISC /* 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. */ __MATHCALL (fabs,, (_Mdouble_ __x)); /* 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. */ __MATHDECL (int, isinf,, (_Mdouble_ __value)); /* Return nonzero if VALUE is not a number. */ __MATHDECL (int, isnan,, (_Mdouble_ __value)); /* Return nonzero if VALUE is finite and not NaN. */ __MATHDECL (int, finite,, (_Mdouble_ __value)); /* 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. */ __MATHCALL (infnan,, (int __error)); /* Return X with its signed changed to Y's. */ __MATHCALL (copysign,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return X times (2 to the Nth power). */ __MATHCALL (scalb,, (_Mdouble_ __x, _Mdouble_ __n)); /* 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 base 2 signed integral exponent of X. */ __MATHCALL (logb,, (_Mdouble_ __x)); /* Return the integer nearest X in the direction of the prevailing rounding mode. */ __MATHCALL (rint,, (_Mdouble_ __x)); /* Return `sqrt(X*X + Y*Y)'. */ __MATHCALL (hypot,, (_Mdouble_ __x, _Mdouble_ __y)); struct __MATH_PRECNAME(__cabs_complex,) { _Mdouble_ x, y; }; /* Return `sqrt(X*X + Y*Y)'. */ __MATHCALL (cabs,, (struct __MATH_PRECNAME(__cabs_complex,))); /* Return X + epsilon if X < Y, X - epsilon if X > Y. */ __MATHCALL (nextafter,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return the remainder of integer divison X / Y with infinite precision. */ __MATHCALL (remainder,, (_Mdouble_ __x, _Mdouble_ __y)); /* Return the binary exponent of X, which must be nonzero. */ __MATHDECL (int, ilogb,, (_Mdouble_ __x)); /* Return the fractional part of X after dividing out `ilogb (X)'. */ __MATHCALL (significand,, (_Mdouble_ __x)); /* Error, gamma, and Bessel functions. */ __MATHCALL (erf,, (_Mdouble_)); __MATHCALL (erfc,, (_Mdouble_)); __MATHCALL (gamma,, (_Mdouble_)); __MATHCALL (j0,, (_Mdouble_)); __MATHCALL (j1,, (_Mdouble_)); __MATHCALL (jn,, (int, _Mdouble_)); __MATHCALL (lgamma,, (_Mdouble_)); __MATHCALL (y0,, (_Mdouble_)); __MATHCALL (y1,, (_Mdouble_)); __MATHCALL (yn,, (int, _Mdouble_)); /* This variable is used by `gamma' and `lgamma'. */ extern int signgam; #ifdef __USE_REENTRANT /* 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. */