/**
* Creates a new composite buffer which wraps the slices of the specified NIO buffers without
* copying them. A modification on the content of the specified buffers will be visible to the
* returned buffer.
*
* @throws IllegalArgumentException if the specified buffers' endianness are different from each
* other
*/
public static ChannelBuffer wrappedBuffer(ByteBuffer... buffers) {
switch (buffers.length) {
case 0:
break;
case 1:
if (buffers[0].hasRemaining()) {
return wrappedBuffer(buffers[0]);
}
break;
default:
ByteOrder order = null;
final List<ChannelBuffer> components = new ArrayList<ChannelBuffer>(buffers.length);
for (ByteBuffer b : buffers) {
if (b == null) {
break;
}
if (b.hasRemaining()) {
if (order != null) {
if (!order.equals(b.order())) {
throw new IllegalArgumentException("inconsistent byte order");
}
} else {
order = b.order();
}
components.add(wrappedBuffer(b));
}
}
return compositeBuffer(order, components);
}
return EMPTY_BUFFER;
}
public final AbstractMemory order(Ruby runtime, ByteOrder order) {
return new Pointer(
runtime,
order.equals(getMemoryIO().order())
? getMemoryIO()
: new SwappedMemoryIO(runtime, getMemoryIO()),
size,
typeSize);
}
/**
* Convenience method for encoding a short into a byte stream.
*
* @param value
* @param out
* @throws IOException
*/
public void write(short value) throws IOException {
if (endian.equals(ByteOrder.BIG_ENDIAN)) {
out.write((byte) ((value >> 8) & 0xff));
out.write((byte) (value & 0xff));
} else {
out.write((byte) (value & 0xff));
out.write((byte) ((value >> 8) & 0xff));
}
}
/**
* Creates a new buffer whose content is a merged copy of the specified {@code buffers}' slices.
* The new buffer's {@code readerIndex} and {@code writerIndex} are {@code 0} and the sum of all
* buffers' {@code remaining} respectively.
*
* @throws IllegalArgumentException if the specified buffers' endianness are different from each
* other
*/
public static ByteBuf copiedBuffer(ByteBuffer... buffers) {
switch (buffers.length) {
case 0:
return EMPTY_BUFFER;
case 1:
return copiedBuffer(buffers[0]);
}
// Merge the specified buffers into one buffer.
ByteOrder order = null;
int length = 0;
for (ByteBuffer b : buffers) {
int bLen = b.remaining();
if (bLen <= 0) {
continue;
}
if (Integer.MAX_VALUE - length < bLen) {
throw new IllegalArgumentException("The total length of the specified buffers is too big.");
}
length += bLen;
if (order != null) {
if (!order.equals(b.order())) {
throw new IllegalArgumentException("inconsistent byte order");
}
} else {
order = b.order();
}
}
if (length == 0) {
return EMPTY_BUFFER;
}
byte[] mergedArray = new byte[length];
for (int i = 0, j = 0; i < buffers.length; i++) {
// Duplicate the buffer so we not adjust the position during our get operation.
// See https://github.com/netty/netty/issues/3896
ByteBuffer b = buffers[i].duplicate();
int bLen = b.remaining();
b.get(mergedArray, j, bLen);
j += bLen;
}
return wrappedBuffer(mergedArray).order(order);
}
/**
* Creates a new buffer whose content is a merged copy of the specified {@code buffers}' readable
* bytes. The new buffer's {@code readerIndex} and {@code writerIndex} are {@code 0} and the sum
* of all buffers' {@code readableBytes} respectively.
*
* @throws IllegalArgumentException if the specified buffers' endianness are different from each
* other
*/
public static ByteBuf copiedBuffer(ByteBuf... buffers) {
switch (buffers.length) {
case 0:
return EMPTY_BUFFER;
case 1:
return copiedBuffer(buffers[0]);
}
// Merge the specified buffers into one buffer.
ByteOrder order = null;
int length = 0;
for (ByteBuf b : buffers) {
int bLen = b.readableBytes();
if (bLen <= 0) {
continue;
}
if (Integer.MAX_VALUE - length < bLen) {
throw new IllegalArgumentException("The total length of the specified buffers is too big.");
}
length += bLen;
if (order != null) {
if (!order.equals(b.order())) {
throw new IllegalArgumentException("inconsistent byte order");
}
} else {
order = b.order();
}
}
if (length == 0) {
return EMPTY_BUFFER;
}
byte[] mergedArray = new byte[length];
for (int i = 0, j = 0; i < buffers.length; i++) {
ByteBuf b = buffers[i];
int bLen = b.readableBytes();
b.getBytes(b.readerIndex(), mergedArray, j, bLen);
j += bLen;
}
return wrappedBuffer(mergedArray).order(order);
}
/**
* Convenience method for encoding a long into a byte stream.
*
* @param value
* @param out
* @throws IOException
*/
public void write(long value) throws IOException {
if (endian.equals(ByteOrder.BIG_ENDIAN)) {
out.write((byte) ((value >> 56) & 0xff));
out.write((byte) ((value >> 48) & 0xff));
out.write((byte) ((value >> 40) & 0xff));
out.write((byte) ((value >> 32) & 0xff));
out.write((byte) ((value >> 24) & 0xff));
out.write((byte) ((value >> 16) & 0xff));
out.write((byte) ((value >> 8) & 0xff));
out.write((byte) (value & 0xff));
} else {
out.write((byte) (value & 0xff));
out.write((byte) ((value >> 8) & 0xff));
out.write((byte) ((value >> 16) & 0xff));
out.write((byte) ((value >> 24) & 0xff));
out.write((byte) ((value >> 32) & 0xff));
out.write((byte) ((value >> 40) & 0xff));
out.write((byte) ((value >> 48) & 0xff));
out.write((byte) ((value >> 56) & 0xff));
}
}
/**
* Creates a new composite buffer which wraps the readable bytes of the specified buffers without
* copying them. A modification on the content of the specified buffers will be visible to the
* returned buffer.
*
* @throws IllegalArgumentException if the specified buffers' endianness are different from each
* other
*/
public static ChannelBuffer wrappedBuffer(ChannelBuffer... buffers) {
switch (buffers.length) {
case 0:
break;
case 1:
if (buffers[0].readable()) {
return wrappedBuffer(buffers[0]);
}
break;
default:
ByteOrder order = null;
final List<ChannelBuffer> components = new ArrayList<ChannelBuffer>(buffers.length);
for (ChannelBuffer c : buffers) {
if (c == null) {
break;
}
if (c.readable()) {
if (order != null) {
if (!order.equals(c.order())) {
throw new IllegalArgumentException("inconsistent byte order");
}
} else {
order = c.order();
}
if (c instanceof CompositeChannelBuffer) {
// Expand nested composition.
components.addAll(
((CompositeChannelBuffer) c).decompose(c.readerIndex(), c.readableBytes()));
} else {
// An ordinary buffer (non-composite)
components.add(c.slice());
}
}
}
return compositeBuffer(order, components);
}
return EMPTY_BUFFER;
}
public static boolean isLittleEndian() {
ByteOrder b = ByteOrder.nativeOrder();
return b.equals(ByteOrder.LITTLE_ENDIAN);
}
