gcc/libstdc++-v3/src/complex_io.cc

// The template and inlines for the -*- C++ -*- complex number classes.

// Copyright (C) 2000 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

#include <bits/std_complex.h>
#include <bits/std_istream.h>
#include <bits/std_ostream.h>
#include <bits/std_sstream.h>

namespace std
{
    
  template<typename _Tp, typename _CharT, class _Traits>
    basic_istream <_CharT, _Traits> &
    operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x)
    {
#if !defined(_GLIBCPP_BUGGY_FLOAT_COMPLEX) && !defined(_GLIBCPP_BUGGY_COMPLEX)
      _Tp __re_x, __im_x;
      _CharT __ch;
      __is >> __ch;
      if (__ch == '(') 
	{
	  __is >> __re_x >> __ch;
	  if (__ch == ',') 
	    {
	      __is >> __im_x >> __ch;
	      if (__ch == ')') 
		{
		  __x = complex<_Tp>(__re_x, __im_x);
		  return __is;
		}
	    }
	  else if (__ch == ')') 
	    {
	      __x = complex<_Tp>(__re_x, _Tp(0));
	      return __is;
	    }
	}
      else 
	{
	  __is.putback(__ch);
	  __is >> __re_x;
	  __x = complex<_Tp>(__re_x, _Tp(0));
	  return __is;
	}
      __is.setstate(ios_base::failbit);
#else
      __x = complex<_Tp>(_Tp(0), _Tp(0));
#endif
      return __is;
    }

  template<typename _Tp, typename _CharT, class _Traits>
    basic_ostream<_CharT, _Traits>&
    operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
    {
      basic_ostringstream<_CharT, _Traits> __s;
      __s.flags(__os.flags());
      __s.imbue(__os.getloc());
      __s.precision (__os.precision());
      __s << '(' << __x.real() << "," << __x.imag() << ')' << ends;
      return __os << __s.str();
    }


  template
    basic_istream<char, char_traits<char> >&
    operator>>(basic_istream< char, char_traits<char> >&,
               complex<float>&);

  template
    basic_ostream<char, char_traits<char> >&
    operator<<(basic_ostream< char, char_traits<char> >&,
               const complex<float>&);

  template
    basic_istream<char, char_traits<char> >&
    operator>>(basic_istream< char, char_traits<char> >&,
               complex<double>&);

  template
    basic_ostream<char, char_traits<char> >&
    operator<<(basic_ostream< char, char_traits<char> >&,
               const complex<double>&);

  template
    basic_istream<char, char_traits<char> >&
    operator>>(basic_istream< char, char_traits<char> >&,
               complex<long double>&);

  template
    basic_ostream<char, char_traits<char> >&
    operator<<(basic_ostream< char, char_traits<char> >&,
               const complex<long double>&);

#ifdef _GLIBCPP_USE_WCHAR_T
  template
    basic_istream<wchar_t, char_traits<wchar_t> >&
    operator>>(basic_istream< wchar_t, char_traits<wchar_t> >&,
               complex<float>&);

  template
    basic_ostream<wchar_t, char_traits<wchar_t> >&
    operator<<(basic_ostream< wchar_t, char_traits<wchar_t> >&,
               const complex<float>&);

  template
    basic_istream<wchar_t, char_traits<wchar_t> >&
    operator>>(basic_istream< wchar_t, char_traits<wchar_t> >&,
               complex<double>&);

  template
    basic_ostream<wchar_t, char_traits<wchar_t> >&
    operator<<(basic_ostream< wchar_t, char_traits<wchar_t> >&,
               const complex<double>&);

  template
    basic_istream<wchar_t, char_traits<wchar_t> >&
    operator>>(basic_istream< wchar_t, char_traits<wchar_t> >&,
               complex<long double>&);

  template
    basic_ostream<wchar_t, char_traits<wchar_t> >&
    operator<<(basic_ostream< wchar_t, char_traits<wchar_t> >&,
               const complex<long double>&);
#endif //_GLIBCPP_USE_WCHAR_T
}