terminfo.c

i386的bootloader源码grub

/* terminfo.c - read a terminfo entry from the command line */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2002,2004  Free Software Foundation, Inc.
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * ######################################################################
 *
 * This file contains various functions dealing with different 
 * terminal capabilities. It knows the difference between a vt52 and vt100 
 * terminal (and much more) and is mainly used the terminal emulation
 * in the serial driver.
 */

#include <shared.h>
#include "terminfo.h"
#include "tparm.h"
#include "serial.h"

/* Current terminal capabilities. Default is "vt100".  */
struct terminfo term =
  {
    .name                = "vt100",
    .cursor_address      = "\e[%i%p1%d;%p2%dH",
    .clear_screen        = "\e[H\e[J",
    .enter_standout_mode = "\e[7m",
    .exit_standout_mode  = "\e[m"
  };

/* A number of escape sequences are provided in the string valued
   capabilities for easy encoding of characters there.  Both \E and \e
   map to an ESCAPE character, ^x maps to a control-x for any
   appropriate x, and the sequences \n \l \r \t \b \f \s give a
   newline, line-feed, return, tab, backspace, form-feed, and space.
   Other escapes include \^ for ^, \\ for \, \, for comma, \: for :,
   and \0 for null.  (\0 will produce \200, which does not terminate a
   string but behaves as a null character on most terminals, provid