vgastreambuf.h

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/*
 *  Copyright (C) 2004 Bregmasoft
 * 
 * This program 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 of the License, or (at your option) any later
 * version.
 * 
 * This program 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 program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA
 */
#ifndef ZYGOMA_IA32_VGASTREAMBUF_H_
#define ZYGOMA_IA32_VGASTREAMBUF_H_

#include <streambuf>

namespace Zygoma
{
  namespace ia32
  {
    int vgaWriteChar(char c);


    template<typename Char, typename Traits = std::char_traits<Char> >
      class VgaStreambuf
      : public std::basic_streambuf<Char, Traits>
      {
      public:
        typedef typename std::basic_streambuf<Char, Traits>::traits_type traits_type;
        typedef typename std::basic_streambuf<Char, Traits>::int_type    int_type;

      public:
        VgaStreambuf() { }

      protected:
        int_type
        overflow(int_type c = traits_type::eof());

      private:
        VgaStreambuf(const VgaStreambuf&);
        VgaStreambuf& operator=(const VgaStreambuf&);
      };


    template<typename Char, typename Traits>
      typename VgaStreambuf<Char, Traits>::int_type VgaStreambuf<Char, Traits>::
      overflow(int_type c)
      {
        if (!traits_type::eq_int_type(c, traits_type::eof()))
        {
          if (vgaWriteChar(traits_type::to_char_type(c)) < 0)
          {
            return traits_type::eof();
          }
          else
          {
            return c;
          }
        }
        return traits_type::not_eof(c);
      }

  } // namespace ia32
} // namespace Zygoma

#endif // ZYGOMA_IA32_VGASTREAMBUF_H_

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