#include "substdio.h"

int substdio_copy(ssout,ssin)

register substdio *ssout;

register substdio *ssin;

{

  register int n;

  register char *x;

  for (;;) {

    n = substdio_feed(ssin);

    if (n < 0) return -2;

    if (!n) return 0;

    x = substdio_PEEK(ssin);

    if (substdio_put(ssout,x,n) == -1) return -3;

    substdio_SEEK(ssin,n);

  }

}