libstdc++/std/ldcomplex.h

   1 // The -*- C++ -*- long_double_complex class.
   2 // Copyright (C) 1994 Free Software Foundation
   3
   4 // This file is part of the GNU ANSI C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 2, or (at your option)
   8 // any later version.
   9
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this library; see the file COPYING.  If not, write to the Free
  17 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 // As a special exception, if you link this library with files
  20 // compiled with a GNU compiler to produce an executable, this does not cause
  21 // the resulting executable to be covered by the GNU General Public License.
  22 // This exception does not however invalidate any other reasons why
  23 // the executable file might be covered by the GNU General Public License.
  24
  25 // Written by Jason Merrill based upon the specification in the 27 May 1994
  26 // C++ working paper, ANSI document X3J16/94-0098.
  27
  28 #ifndef __LDCOMPLEX__
  29 #define __LDCOMPLEX__
  30
  31 #ifdef __GNUG__
  32 #pragma interface "ldcomplex"
  33 #endif
  34
  35 extern "C++" {
  36 class complex<long double>
  37 {
  38 public:
  39   complex (long double r = 0, long double i = 0): re (r), im (i) { }
  40   complex (const complex<float>& r): re (r.real ()), im (r.imag ()) { }
  41   complex (const complex<double>& r): re (r.real ()), im (r.imag ()) { }
  42
  43   complex& operator+= (const complex& r) { return __doapl (this, r); }
  44   complex& operator-= (const complex& r) { return __doami (this, r); }
  45   complex& operator*= (const complex& r) { return __doaml (this, r); }
  46   complex& operator/= (const complex& r) { return __doadv (this, r); }
  47
  48   long double real () const { return re; }
  49   long double imag () const { return im; }
  50 private:
  51   long double re, im;
  52
  53   friend complex& __doapl (complex *, const complex&);
  54   friend complex& __doami (complex *, const complex&);
  55   friend complex& __doaml (complex *, const complex&);
  56   friend complex& __doadv (complex *, const complex&);
  57
  58   // These functions are specified as friends for purposes of name injection;
  59   // they do not actually reference private members.
  60   friend long double real (const complex& x) { return x.real (); }
  61   friend long double imag (const complex& x) { return x.imag (); }
  62   friend complex operator + (const complex&, const complex&) __attribute__ ((const));
  63   friend complex operator + (const complex&, long double) __attribute__ ((const));
  64   friend complex operator + (long double, const complex&) __attribute__ ((const));
  65   friend complex operator - (const complex&, const complex&) __attribute__ ((const));
  66   friend complex operator - (const complex&, long double) __attribute__ ((const));
  67   friend complex operator - (long double, const complex&) __attribute__ ((const));
  68   friend complex operator * (const complex&, const complex&) __attribute__ ((const));
  69   friend complex operator * (const complex&, long double) __attribute__ ((const));
  70   friend complex operator * (long double, const complex&) __attribute__ ((const));
  71   friend complex operator / (const complex&, const complex&) __attribute__ ((const));
  72   friend complex operator / (const complex&, long double) __attribute__ ((const));
  73   friend complex operator / (long double, const complex&) __attribute__ ((const));
  74   friend bool operator == (const complex&, const complex&) __attribute__ ((const));
  75   friend bool operator == (const complex&, long double) __attribute__ ((const));
  76   friend bool operator == (long double, const complex&) __attribute__ ((const));
  77   friend bool operator != (const complex&, const complex&) __attribute__ ((const));
  78   friend bool operator != (const complex&, long double) __attribute__ ((const));
  79   friend bool operator != (long double, const complex&) __attribute__ ((const));
  80   friend complex polar (long double, long double) __attribute__ ((const));
  81   friend complex pow (const complex&, const complex&) __attribute__ ((const));
  82   friend complex pow (const complex&, long double) __attribute__ ((const));
  83   friend complex pow (const complex&, int) __attribute__ ((const));
  84   friend complex pow (long double, const complex&) __attribute__ ((const));
  85   friend istream& operator>> (istream&, complex&);
  86   friend ostream& operator<< (ostream&, const complex&);
  87 };
  88
  89 inline complex<float>::complex (const complex<long double>& r)
  90 : re (r.real ()), im (r.imag ())
  91 { }
  92
  93 inline complex<double>::complex (const complex<long double>& r)
  94 : re (r.real ()), im (r.imag ())
  95 { }
  96 } // extern "C++"
  97
  98 #endif