1 #include "substdio.h"

     2 

     3 int substdio_copy(ssout,ssin)

     4 register substdio *ssout;

     5 register substdio *ssin;

     6 {

     7   register int n;

     8   register char *x;

     9 

    10   for (;;) {

    11     n = substdio_feed(ssin);

    12     if (n < 0) return -2;

    13     if (!n) return 0;

    14     x = substdio_PEEK(ssin);

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

    16     substdio_SEEK(ssin,n);

    17   }

    18 }