in_count
in_count = 1;
in_count++;
} else if ((count_int)in_count >=
checkpoint = in_count + CHECK_GAP;
if (in_count > 0x007fffff) { /* Shift will overflow. */
rat = in_count / rat;
rat = (in_count << 8) / bytes_out; /* 8 fractional bits. */
in_count = 1; /* Length of input. */