bget
val = bget(in);
val += (unsigned long)(bget(in)) << 8;
val += (unsigned long)(bget(in)) << 16;
val += (unsigned long)(bget(in)) << 24;
if (bget(in) != 0x1f || bget(in) != 0x8b || bget(in) != 8)
flags = bget(in);
len = bget(in);
len += (unsigned)(bget(in)) << 8;
while (bget(in) != 0)
while (bget(in) != 0)