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cccb6c7287
libc++ disallows including LibC's complex.h in C++ mode. This means that a C++ file cannot expect LibC's complex.h to be included, and thus cannot use c-prefixed complex number functions. As a result, complex.cpp is broken when libc++ has a higher include priority than LibC. A check for __cplusplus has been added to complex.h to warn users of toolchains that don't use libc++.
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Copyright (c) 2022, Peter Elliott <pelliott@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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/* complex arithmetic
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*
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* https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/complex.h.html
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*/
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#pragma once
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#ifdef __cplusplus
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# error "C++ code must not include complex.h. Use AK/Complex.h instead."
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#endif
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#include <stddef.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#define complex _Complex
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#define _Complex_I (0.0f + 1.0fi)
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#define I _Complex_I
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#define CMPLX(x, y) ((double complex)__builtin_complex((double)x, (double)y))
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#define CMPLXF(x, y) ((float complex)__builtin_complex((float)x, (float)y))
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#define CMPLXL(x, y) ((long double complex)__builtin_complex((long double)x, (long double)y))
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// These are macro implementations of the above functions, so that they will always be inlined.
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#define creal(z) ((double)__real__((double complex)z))
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#define crealf(z) ((float)__real__((float complex)z))
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#define creall(z) ((long double)__real__((long double complex)z))
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#define cimag(z) ((double)__imag__((double complex)z))
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#define cimagf(z) ((float)__imag__((float complex)z))
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#define cimagl(z) ((long double)__imag__((long double complex)z))
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// Function definitions of this form "type (name)(args)" are intentional, to
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// prevent macro versions of "name" from being incorrectly expanded. These
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// functions are here to provide external linkage to their macro implementations.
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/creal.html
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inline float(crealf)(float complex z)
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{
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return crealf(z);
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}
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inline double(creal)(double complex z)
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{
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return creal(z);
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}
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inline long double(creall)(long double complex z)
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{
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return creall(z);
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}
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// https://pubs.opengroup.org/onlinepubs/9699919799/functions/cimag.html
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inline double(cimag)(double complex z)
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{
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return cimag(z);
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}
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inline float(cimagf)(float complex z)
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{
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return cimagf(z);
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}
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inline long double(cimagl)(long double complex z)
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{
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return cimagl(z);
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}
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__END_DECLS
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