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95 lines
4.5 KiB
C++
95 lines
4.5 KiB
C++
// The -*- C++ -*- double_complex class.
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// Copyright (C) 1994 Free Software Foundation
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// This file is part of the GNU ANSI C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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// As a special exception, if you link this library with files
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// compiled with a GNU compiler to produce an executable, this does not cause
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// the resulting executable to be covered by the GNU General Public License.
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// This exception does not however invalidate any other reasons why
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// the executable file might be covered by the GNU General Public License.
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// Written by Jason Merrill based upon the specification in the 27 May 1994
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// C++ working paper, ANSI document X3J16/94-0098.
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#ifndef __DCOMPLEX__
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#define __DCOMPLEX__
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#ifdef __GNUG__
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#pragma interface "dcomplex"
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#endif
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extern "C++" {
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class complex<double>
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{
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public:
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complex (double r = 0, double i = 0): re (r), im (i) { }
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complex (const complex<float>& r): re (r.real ()), im (r.imag ()) { }
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explicit complex (const complex<long double>& r);
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complex& operator+= (const complex& r) { return __doapl (this, r); }
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complex& operator-= (const complex& r) { return __doami (this, r); }
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complex& operator*= (const complex& r) { return __doaml (this, r); }
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complex& operator/= (const complex& r) { return __doadv (this, r); }
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double real () const { return re; }
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double imag () const { return im; }
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private:
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double re, im;
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friend complex& __doapl (complex *, const complex&);
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friend complex& __doami (complex *, const complex&);
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friend complex& __doaml (complex *, const complex&);
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friend complex& __doadv (complex *, const complex&);
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// These functions are specified as friends for purposes of name injection;
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// they do not actually reference private members.
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friend double real (const complex& x) { return x.real (); }
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friend double imag (const complex& x) { return x.imag (); }
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friend complex operator + (const complex&, const complex&) __attribute__ ((const));
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friend complex operator + (const complex&, double) __attribute__ ((const));
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friend complex operator + (double, const complex&) __attribute__ ((const));
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friend complex operator - (const complex&, const complex&) __attribute__ ((const));
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friend complex operator - (const complex&, double) __attribute__ ((const));
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friend complex operator - (double, const complex&) __attribute__ ((const));
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friend complex operator * (const complex&, const complex&) __attribute__ ((const));
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friend complex operator * (const complex&, double) __attribute__ ((const));
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friend complex operator * (double, const complex&) __attribute__ ((const));
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friend complex operator / (const complex&, const complex&) __attribute__ ((const));
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friend complex operator / (const complex&, double) __attribute__ ((const));
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friend complex operator / (double, const complex&) __attribute__ ((const));
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friend bool operator == (const complex&, const complex&) __attribute__ ((const));
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friend bool operator == (const complex&, double) __attribute__ ((const));
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friend bool operator == (double, const complex&) __attribute__ ((const));
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friend bool operator != (const complex&, const complex&) __attribute__ ((const));
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friend bool operator != (const complex&, double) __attribute__ ((const));
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friend bool operator != (double, const complex&) __attribute__ ((const));
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friend complex polar (double, double) __attribute__ ((const));
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friend complex pow (const complex&, const complex&) __attribute__ ((const));
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friend complex pow (const complex&, double) __attribute__ ((const));
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friend complex pow (const complex&, int) __attribute__ ((const));
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friend complex pow (double, const complex&) __attribute__ ((const));
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friend istream& operator>> (istream&, complex&);
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friend ostream& operator<< (ostream&, const complex&);
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};
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inline complex<float>::complex (const complex<double>& r)
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: re (r.real ()), im (r.imag ())
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{ }
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} // extern "C++"
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#endif
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