stdio.c

/*
 * Copyright (C) 2012 Michael Brown <mbrown@fensystems.co.uk>.
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

/**
 * @file
 *
 * Standard Input/Output
 *
 */

#include <stdio.h>
#include <string.h>
#include "bootapp.h"
#include "wimboot.h"

/**
 * Print character to console
 *
 * @v character   Character to print
 */
int putchar (int character)
{
  struct bootapp_callback_params params;
  /* Convert LF to CR,LF */
  if (character == '\n')
  {
    putchar ('\r');
  }
  memset (&params, 0, sizeof (params));
  params.vector.interrupt = 0x10;
  params.eax = (0x0e00 | character);
  params.ebx = 0x0007;
  call_interrupt (&params);
  return 0;
}

/**
 * Get character from console
 *
 * @ret character Character
 */
int getchar (void)
{
  struct bootapp_callback_params params;
  int character;
  /* Get character */
  memset (&params, 0, sizeof (params));
  params.vector.interrupt = 0x16;
  call_interrupt (&params);
  character = params.al;
  return character;
}