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 /* Compiler implementation of the D programming language * Copyright (C) 1999-2021 by The D Language Foundation, All Rights Reserved * written by Walter Bright * http://www.digitalmars.com * Distributed under the Boost Software License, Version 1.0. * http://www.boost.org/LICENSE_1_0.txt * https://github.com/dlang/dmd/blob/master/src/dmd/complex_t.h */ #pragma once #include "root/ctfloat.h" /* Roll our own complex type for compilers that don't support complex */ struct complex_t { real_t re; real_t im; complex_t(real_t re) : re(re), im(ldouble(0)) {} complex_t(real_t re, real_t im) : re(re), im(im) {} complex_t operator + (complex_t y) { return complex_t(re + y.re, im + y.im); } complex_t operator - (complex_t y) { return complex_t(re - y.re, im - y.im); } complex_t operator - () { return complex_t(-re, -im); } complex_t operator * (complex_t y) { return complex_t(re * y.re - im * y.im, im * y.re + re * y.im); } complex_t operator / (complex_t y) { if (CTFloat::fabs(y.re) < CTFloat::fabs(y.im)) { real_t r = y.re / y.im; real_t den = y.im + r * y.re; return complex_t((re * r + im) / den, (im * r - re) / den); } else { real_t r = y.im / y.re; real_t den = y.re + r * y.im; return complex_t((re + r * im) / den, (im - r * re) / den); } } operator bool () { return re || im; } int operator == (complex_t y) { return re == y.re && im == y.im; } int operator != (complex_t y) { return re != y.re || im != y.im; } private: complex_t() : re(ldouble(0)), im(ldouble(0)) {} }; inline complex_t operator * (real_t x, complex_t y) { return complex_t(x) * y; } inline complex_t operator * (complex_t x, real_t y) { return x * complex_t(y); } inline complex_t operator / (complex_t x, real_t y) { return x / complex_t(y); } inline real_t creall(complex_t x) { return x.re; } inline real_t cimagl(complex_t x) { return x.im; }