public void push(byte b) {
if (room() == 0) expand();
queue[tail] = b;
if (head == -1) head = 0;
tail = (tail + 1) % queue.length;
size++;
}
public void push(byte[] b, int pos, int length) {
if (length == 0) return;
while (room() < length) expand();
int tailLength = queue.length - tail;
if (tailLength > length) System.arraycopy(b, pos, queue, tail, length);
else System.arraycopy(b, pos, queue, tail, tailLength);
if (length > tailLength) System.arraycopy(b, tailLength + pos, queue, 0, length - tailLength);
if (head == -1) head = 0;
tail = (tail + length) % queue.length;
size += length;
}
public void read(InputStream in, int length) throws IOException {
if (length == 0) return;
while (room() < length) expand();
int tailLength = queue.length - tail;
if (tailLength > length) readImpl(in, tail, length);
else readImpl(in, tail, tailLength);
if (length > tailLength) readImpl(in, 0, length - tailLength);
if (head == -1) head = 0;
tail = (tail + length) % queue.length;
size += length;
}
public void push(ByteBuffer source) {
int length = source.remaining();
if (length == 0) return;
while (room() < length) expand();
int tailLength = queue.length - tail;
if (tailLength > length) source.get(queue, tail, length);
else source.get(queue, tail, tailLength);
if (length > tailLength) source.get(queue, 0, length - tailLength);
if (head == -1) head = 0;
tail = (tail + length) % queue.length;
size += length;
}