Annotation of gforth/termsize.fs, revision 1.1
1.1 ! anton 1: \ terminal size stuff
! 2:
! 3: \ Copyright (C) 1996 Free Software Foundation, Inc.
! 4:
! 5: \ This file is part of Gforth.
! 6:
! 7: \ Gforth is free software; you can redistribute it and/or
! 8: \ modify it under the terms of the GNU General Public License
! 9: \ as published by the Free Software Foundation; either version 2
! 10: \ of the License, or (at your option) any later version.
! 11:
! 12: \ This program is distributed in the hope that it will be useful,
! 13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: \ GNU General Public License for more details.
! 16:
! 17: \ You should have received a copy of the GNU General Public License
! 18: \ along with this program; if not, write to the Free Software
! 19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
! 20:
! 21:
! 22: \ Currently we get the size from the environment. If the variables
! 23: \ LINES and COLUMNS are not set or wrong, do an "eval `resize`" before
! 24: \ starting Gforth. If you change the window size after starting
! 25: \ Gforth, you are out of luck.
! 26:
! 27: \ To do: An implementation that uses termcap and/or ioctl TIOCGWINSZ.
! 28:
! 29: \ # rows and columns that the terminal has.
! 30: \ these words are also present in PFE.
! 31: &80 Value cols
! 32: &24 Value rows
! 33:
! 34: : getenv-unum ( udefault c-addr ucount -- u )
! 35: getenv over
! 36: IF
! 37: 0. 2swap >number 0=
! 38: IF ( udefault d c-addr2 )
! 39: drop drop nip
! 40: ELSE ( udefault djunk c-addr2 )
! 41: drop 2drop
! 42: ENDIF
! 43: ELSE ( udefault c-addr ucount )
! 44: 2drop
! 45: ENDIF ;
! 46:
! 47: :noname ( -- )
! 48: defers 'cold
! 49: cols s" COLUMNS" getenv-unum TO cols
! 50: rows s" LINES" getenv-unum TO rows ;
! 51: IS 'cold
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