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Diffstat (limited to 'include/tgmath.h')
| -rw-r--r-- | include/tgmath.h | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/include/tgmath.h b/include/tgmath.h new file mode 100644 index 0000000..7f4de6f --- /dev/null +++ b/include/tgmath.h @@ -0,0 +1,210 @@ +/*- + * 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. + * + * $FreeBSD$ + */ + +#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_ */ |
