/* todos.c
 * add <cr>       this program converts DOS files to Unix files
 * typical execution in a directory     todos *.*    converts all files
 */
#include <stdio.h>
#include <stdlib.h>

void main(int argc, char *argv[])
{
  FILE *inp;
  FILE *tmp;
  int achar;
  int pchar;
  int mone = -1;
  int cr = 13;
  int lf = 10;
  int endsent = 255;
  int i;
  char tmpName[] = "ToDos.Tmp";

  achar = 0;

  if (argc < 2)
  {
    printf("need file(s) to remove <cr> \n");
    exit(1);
  }

  remove(tmpName);

  for (i=1; i<argc; i++)
  {  
    inp = fopen(argv[i],"r+");
    if (inp==NULL)
    {
      printf("can not open for read/write %s\n", argv[i]);
      exit(1);
    }
    tmp = fopen(tmpName,"w+");
    if (tmp==NULL)
    {
      printf("can not open for read/write %s\n", tmpName);
      exit(1);
    }
    while (!feof(inp))
    {
      pchar=achar;
      achar=fgetc(inp);
      if (achar==lf && pchar!=cr)
      {
          /*fputc(cr,tmp);*/  /* DOS seems to add the <cr> itself */
      }
      if (achar!=endsent && achar!=mone)
      {                     /* prevent two  ^F at end of file */
        fputc(achar,tmp);
      }
    }
    fclose(inp);
    fclose(tmp);
    remove(argv[i]);
    rename(tmpName,argv[i]);
  }
}