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- /*-
- * SPDX-License-Identifier: BSD-2-Clause
- *
- * Copyright (c) 2004 Stefan Farfeleder.
- * All rights reserved.
- *
- * Copyright (c) 2012 Ed Schouten <ed@FreeBSD.org>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- #ifndef _TGMATH_H_
- #define _TGMATH_H_
- #include <complex.h>
- #include <math.h>
- /*
- * This implementation of <tgmath.h> uses the two following macros,
- * which are based on the macros described in C11 proposal N1404:
- * __tg_impl_simple(x, y, z, fnl, fn, fnf, ...)
- * Invokes fnl() if the corresponding real type of x, y or z is long
- * double, fn() if it is double or any has an integer type, and fnf()
- * otherwise.
- * __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...)
- * Invokes [c]fnl() if the corresponding real type of x or y is long
- * double, [c]fn() if it is double or any has an integer type, and
- * [c]fnf() otherwise. The function with the 'c' prefix is called if
- * any of x or y is a complex number.
- * Both macros call the chosen function with all additional arguments passed
- * to them, as given by __VA_ARGS__.
- *
- * Note that these macros cannot be implemented with C's ?: operator,
- * because the return type of the whole expression would incorrectly be long
- * double complex regardless of the argument types.
- *
- * The structure of the C11 implementation of these macros can in
- * principle be reused for non-C11 compilers, but due to an integer
- * promotion bug for complex types in GCC 4.2, simply let non-C11
- * compilers use an inefficient yet reliable version.
- */
- #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \
- __has_extension(c_generic_selections)
- #define __tg_generic(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
- _Generic(x, \
- long double _Complex: cfnl, \
- double _Complex: cfn, \
- float _Complex: cfnf, \
- long double: fnl, \
- default: fn, \
- float: fnf \
- )
- #define __tg_type(x) \
- __tg_generic(x, (long double _Complex)0, (double _Complex)0, \
- (float _Complex)0, (long double)0, (double)0, (float)0)
- #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
- __tg_generic( \
- __tg_type(x) + __tg_type(y) + __tg_type(z), \
- fnl, fn, fnf, fnl, fn, fnf)(__VA_ARGS__)
- #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
- __tg_generic( \
- __tg_type(x) + __tg_type(y), \
- cfnl, cfn, cfnf, fnl, fn, fnf)(__VA_ARGS__)
- #elif defined(__generic)
- #define __tg_generic_simple(x, fnl, fn, fnf) \
- __generic(x, long double _Complex, fnl, \
- __generic(x, double _Complex, fn, \
- __generic(x, float _Complex, fnf, \
- __generic(x, long double, fnl, \
- __generic(x, float, fnf, fn)))))
- #define __tg_impl_simple(x, y, z, fnl, fn, fnf, ...) \
- __tg_generic_simple(x, \
- __tg_generic_simple(y, \
- __tg_generic_simple(z, fnl, fnl, fnl), \
- __tg_generic_simple(z, fnl, fnl, fnl), \
- __tg_generic_simple(z, fnl, fnl, fnl)), \
- __tg_generic_simple(y, \
- __tg_generic_simple(z, fnl, fnl, fnl), \
- __tg_generic_simple(z, fnl, fn , fn ), \
- __tg_generic_simple(z, fnl, fn , fn )), \
- __tg_generic_simple(y, \
- __tg_generic_simple(z, fnl, fnl, fnl), \
- __tg_generic_simple(z, fnl, fn , fn ), \
- __tg_generic_simple(z, fnl, fn , fnf)))(__VA_ARGS__)
- #define __tg_generic_full(x, cfnl, cfn, cfnf, fnl, fn, fnf) \
- __generic(x, long double _Complex, cfnl, \
- __generic(x, double _Complex, cfn, \
- __generic(x, float _Complex, cfnf, \
- __generic(x, long double, fnl, \
- __generic(x, float, fnf, fn)))))
- #define __tg_impl_full(x, y, cfnl, cfn, cfnf, fnl, fn, fnf, ...) \
- __tg_generic_full(x, \
- __tg_generic_full(y, cfnl, cfnl, cfnl, cfnl, cfnl, cfnl), \
- __tg_generic_full(y, cfnl, cfn , cfn , cfnl, cfn , cfn ), \
- __tg_generic_full(y, cfnl, cfn , cfnf, cfnl, cfn , cfnf), \
- __tg_generic_full(y, cfnl, cfnl, cfnl, fnl , fnl , fnl ), \
- __tg_generic_full(y, cfnl, cfn , cfn , fnl , fn , fn ), \
- __tg_generic_full(y, cfnl, cfn , cfnf, fnl , fn , fnf )) \
- (__VA_ARGS__)
- #else
- #error "<tgmath.h> not implemented for this compiler"
- #endif
- /* Macros to save lots of repetition below */
- #define __tg_simple(x, fn) \
- __tg_impl_simple(x, x, x, fn##l, fn, fn##f, x)
- #define __tg_simple2(x, y, fn) \
- __tg_impl_simple(x, x, y, fn##l, fn, fn##f, x, y)
- #define __tg_simple3(x, y, z, fn) \
- __tg_impl_simple(x, y, z, fn##l, fn, fn##f, x, y, z)
- #define __tg_simplev(x, fn, ...) \
- __tg_impl_simple(x, x, x, fn##l, fn, fn##f, __VA_ARGS__)
- #define __tg_full(x, fn) \
- __tg_impl_full(x, x, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x)
- #define __tg_full2(x, y, fn) \
- __tg_impl_full(x, y, c##fn##l, c##fn, c##fn##f, fn##l, fn, fn##f, x, y)
- /* 7.22#4 -- These macros expand to real or complex functions, depending on
- * the type of their arguments. */
- #define acos(x) __tg_full(x, acos)
- #define asin(x) __tg_full(x, asin)
- #define atan(x) __tg_full(x, atan)
- #define acosh(x) __tg_full(x, acosh)
- #define asinh(x) __tg_full(x, asinh)
- #define atanh(x) __tg_full(x, atanh)
- #define cos(x) __tg_full(x, cos)
- #define sin(x) __tg_full(x, sin)
- #define tan(x) __tg_full(x, tan)
- #define cosh(x) __tg_full(x, cosh)
- #define sinh(x) __tg_full(x, sinh)
- #define tanh(x) __tg_full(x, tanh)
- #define exp(x) __tg_full(x, exp)
- #define log(x) __tg_full(x, log)
- #define pow(x, y) __tg_full2(x, y, pow)
- #define sqrt(x) __tg_full(x, sqrt)
- /* "The corresponding type-generic macro for fabs and cabs is fabs." */
- #define fabs(x) __tg_impl_full(x, x, cabsl, cabs, cabsf, \
- fabsl, fabs, fabsf, x)
- /* 7.22#5 -- These macros are only defined for arguments with real type. */
- #define atan2(x, y) __tg_simple2(x, y, atan2)
- #define cbrt(x) __tg_simple(x, cbrt)
- #define ceil(x) __tg_simple(x, ceil)
- #define copysign(x, y) __tg_simple2(x, y, copysign)
- #define erf(x) __tg_simple(x, erf)
- #define erfc(x) __tg_simple(x, erfc)
- #define exp2(x) __tg_simple(x, exp2)
- #define expm1(x) __tg_simple(x, expm1)
- #define fdim(x, y) __tg_simple2(x, y, fdim)
- #define floor(x) __tg_simple(x, floor)
- #define fma(x, y, z) __tg_simple3(x, y, z, fma)
- #define fmax(x, y) __tg_simple2(x, y, fmax)
- #define fmin(x, y) __tg_simple2(x, y, fmin)
- #define fmod(x, y) __tg_simple2(x, y, fmod)
- #define frexp(x, y) __tg_simplev(x, frexp, x, y)
- #define hypot(x, y) __tg_simple2(x, y, hypot)
- #define ilogb(x) __tg_simple(x, ilogb)
- #define ldexp(x, y) __tg_simplev(x, ldexp, x, y)
- #define lgamma(x) __tg_simple(x, lgamma)
- #define llrint(x) __tg_simple(x, llrint)
- #define llround(x) __tg_simple(x, llround)
- #define log10(x) __tg_simple(x, log10)
- #define log1p(x) __tg_simple(x, log1p)
- #define log2(x) __tg_simple(x, log2)
- #define logb(x) __tg_simple(x, logb)
- #define lrint(x) __tg_simple(x, lrint)
- #define lround(x) __tg_simple(x, lround)
- #define nearbyint(x) __tg_simple(x, nearbyint)
- #define nextafter(x, y) __tg_simple2(x, y, nextafter)
- #define nexttoward(x, y) __tg_simplev(x, nexttoward, x, y)
- #define remainder(x, y) __tg_simple2(x, y, remainder)
- #define remquo(x, y, z) __tg_impl_simple(x, x, y, remquol, remquo, \
- remquof, x, y, z)
- #define rint(x) __tg_simple(x, rint)
- #define round(x) __tg_simple(x, round)
- #define scalbn(x, y) __tg_simplev(x, scalbn, x, y)
- #define scalbln(x, y) __tg_simplev(x, scalbln, x, y)
- #define tgamma(x) __tg_simple(x, tgamma)
- #define trunc(x) __tg_simple(x, trunc)
- /* 7.22#6 -- These macros always expand to complex functions. */
- #define carg(x) __tg_simple(x, carg)
- #define cimag(x) __tg_simple(x, cimag)
- #define conj(x) __tg_simple(x, conj)
- #define cproj(x) __tg_simple(x, cproj)
- #define creal(x) __tg_simple(x, creal)
- #endif /* !_TGMATH_H_ */
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