/*
 * Trevor's utility to decode a GSM OTA file.
 *
 * Copyright (C) 2003 Trevor Man
 * 
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <stdio.h>

int main(int argc, char *argv[])
{
  FILE *fp;
  int temp;
  int count;
  int height;
  int width;
  int bpp;

  fprintf(stderr, "Trevor's SMS OTA file decoder v1.0 - Copyright 2003 - Trevor Man\n");

  if (argc != 2) {
    fprintf(stderr, "Syntax: %s picture.ota\n", argv[0]);
    return -1;
  }

  if ((fp = fopen(argv[1], "rb")) == NULL) {
    fprintf(stderr, "Unable to open %s\n", argv[1]);
    return -1;
  }

  if (fgetc(fp) != 0) {
    fprintf(stderr, "Invalid file format\n");
  }
  width = fgetc(fp);
  height = fgetc(fp);
  bpp = fgetc(fp);
  fprintf(stderr, "Image dimensions: %dx%d@%dbpp\n", width, height, bpp);

  if ((width == 0) || (height == 0)) {
    fprintf(stderr, "Invalid image size.\n");
    return -1;
  }

  if (bpp != 1) {
    fprintf(stderr, "Unsupported bit depth (%d).  Only 1-bit images supported.\n", bpp);
    return -1;
  }

  for (count = 0; count < (height * width); count += 8) {
    if ((temp = fgetc(fp)) == -1)
      temp = 0x00;
    fprintf(stdout, "%c%c%c%c%c%c%c%c", temp & 0x80 ? '#' : ' ',
                                        temp & 0x40 ? '#' : ' ',
                                        temp & 0x20 ? '#' : ' ',
                                        temp & 0x10 ? '#' : ' ',
                                        temp & 0x08 ? '#' : ' ',
                                        temp & 0x04 ? '#' : ' ',
                                        temp & 0x02 ? '#' : ' ',
                                        temp & 0x01 ? '#' : ' ');
    if ((count > 0) && ((count + 8) % width == 0))
      fprintf(stdout, "\n");
  }

  fclose(fp);

  return 0;
}