txt2txb.c

#include <stdio.h>

main(int ac,char *av[]) {
  FILE *file,*outfile;
  char equals,ch;
  int code;

  if (ac!=3) {
    printf("TXT2TXB V1.0 Copyright (c) Bryan Aamot, 1995\n"
           "Text to TXB converter for Descent HOG files.\n"
           "Converts a ascii text files to *.txb descent hog file format.\n"
           "Usage: TXT2TXB <text file name> <txb file name>\n"
           "Example: TXT2TXB briefing.txt briefing.txb\n");
    exit(1);
  }
  file = fopen(av[1],"rb");
  if (!file) {
    printf("Can't open file (%s)\n",av[1]);
    exit(2);
  }

  outfile = fopen(av[2],"wb");
  if (!outfile) {
    printf("Can't open file (%s)\n",av[2]);
    fclose(file);
    exit(2);
  }

  for (;;) {
    ch = getc(file);
    if (feof(file)) break;
    if (ch!=0x0d) {
      if (ch==0x0a) {
        fprintf(outfile,"\x0a");
      } else {
        code = ( ( (ch &0xfC) >> 2) + ( (ch &0x03) << 6 ) ) ^ 0xe9;
        fprintf(outfile,"%c",code);
      }
   }
  }

  fclose(outfile);
  fclose(file);
}