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path: root/com32/menu/printmsg.c
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/* ----------------------------------------------------------------------- *
 *
 *   Copyright 2004-2008 H. Peter Anvin - All Rights Reserved
 *
 *   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, Inc., 51 Franklin St, Fifth Floor,
 *   Boston MA 02110-1301, USA; either version 2 of the License, or
 *   (at your option) any later version; incorporated herein by reference.
 *
 * ----------------------------------------------------------------------- */

#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <consoles.h>
#include <getkey.h>
#include <minmax.h>
#include <setjmp.h>
#include <limits.h>
#include <sha1.h>
#include <base64.h>
#include <colortbl.h>
#ifdef __COM32__
#include <com32.h>
#endif

#include "menu.h"

static int draw_message_file(const char *filename)
{
  FILE *f;
  int ch;
  enum msgname_state {
    st_init,			/* Base state */
    st_si_1,			/* <SI> digit 1 */
    st_si_2,			/* <SI> digit 2 */
    st_skipline,		/* Skip until NL */
  } state = st_init;
  int eof = 0;
  int attr = 0;

  f = fopen(filename, "r");
  if (!f)
    return -1;

  /* Clear screen, hide cursor, default attribute */
  printf("\033e\033%%@\033)0\033(B\3#%03d\033[?25l\033[2J\033[H",
	 message_base_color+0x07);

  while (!eof && (ch = getc(f)) != EOF) {
    switch (state) {
    case st_init:
      switch (ch) {
      case '\f':
	fputs("\033[2J\033[H", stdout);
	break;
      case 15:			/* SI */
	state = st_si_1;
	break;
      case 24:
	state = st_skipline;
	break;
      case 26:
	eof = 1;
	break;
      case '\a':
      case '\n':
      case '\r':
	putchar(ch);
	break;
      default:
	if (ch >= 32)
	  putchar(ch);
	break;
      }
      break;

    case st_si_1:
      attr = hexval(ch) << 4;
      state = st_si_2;
      break;

    case st_si_2:
      attr |= hexval(ch);
      printf("\3#%03d", attr+message_base_color);
      state = st_init;
      break;

    case st_skipline:
      if (ch == '\n')
	state = st_init;
      break;
    }
  }

  fclose(f);
  return 0;
}

int show_message_file(const char *filename, const char *background)
{
  int rv = KEY_NONE;
  const char *old_background = NULL;

  if (background) {
    old_background = current_background;
    set_background(background);
  }

  if ( !(rv = draw_message_file(filename)) )
    rv = mygetkey(0);		/* Wait for keypress */

  if (old_background)
    set_background(old_background);

  return rv;
}