ui/util.h

   1 // Copyright 2004 David Hilvert <dhilvert@auricle.dyndns.org>,
   2 //                              <dhilvert@ugcs.caltech.edu>
   3
   4 /*  This file is part of the Anti-Lamenessing Engine.
   5
   6     The Anti-Lamenessing Engine is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 3 of the License, or
   9     (at your option) any later version.
  10
  11     The Anti-Lamenessing Engine is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with the Anti-Lamenessing Engine; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 #ifndef __util_h__
  22 #define __util_h__
  23
  24 #ifdef USE_IOCTL
  25 #include <sys/ioctl.h>
  26 #endif
  27
  28 /*
  29  * Returns the terminal width if possible.  Else, returns
  30  * -1.  Based on the function 'determine_screen_width'
  31  * in wget 1.9.1.
  32  */
  33 static inline int get_terminal_width (FILE *tty_file) {
  34         int error_code = -1;
  35
  36 #if defined USE_IOCTL && defined TIOCGWINSZ
  37         struct winsize wsz;
  38
  39         if(ioctl(fileno(tty_file), TIOCGWINSZ, &wsz) < 0)
  40                 return error_code;
  41
  42         return wsz.ws_col;
  43 #else
  44         return error_code;
  45 #endif
  46 }
  47 #endif