term.C

/*
 * This file is part of the "Archon" framework.
 * (http://files3d.sourceforge.net)
 *
 * Copyright © 2002 by Kristian Spangsege and Brian Kristiansen.
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation under the terms of the GNU General Public License is
 * hereby granted. No representations are made about the suitability of
 * this software for any purpose. It is provided "as is" without express
 * or implied warranty. See the GNU General Public License
 * (http://www.gnu.org/copyleft/gpl.html) for more details.
 *
 * The characters in this file are ISO8859-1 encoded.
 *
 * The documentation in this file is in "Doxygen" style
 * (http://www.doxygen.org).
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <termios.h>
#ifndef TIOCGWINSZ
#include <sys/ioctl.h>
#endif
#include <unistd.h>
#include <errno.h>
#include <string.h>

#include <archon/util/term.H>

namespace Archon
{
  namespace Utilities
  {
    namespace Term
    {
      int getWidth()
      {
        const int tty = open("/dev/tty", O_RDONLY);
        if(tty < 0)
          ARCHON_THROW1(ResourceException,
                        "System::Term::getWidth: Could not open "
                        "/dev/tty: " + string(strerror(errno)));
        winsize s;
        if(ioctl(tty, TIOCGWINSZ, reinterpret_cast<char *>(&s)) < 0)
          ARCHON_THROW1(ResourceException,
                        "System::Term::getWidth: Could not do "
                        "TIOCGWINSZ on /dev/tty: " + string(strerror(errno)));
        if(close(tty) < 0)
          ARCHON_THROW1(ResourceException,
                        "System::Term::getWidth: Could close "
                        "/dev/tty: " + string(strerror(errno)));
        return s.ws_col;
      }
    }
  }
}

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