private String readTypeName(Buffer buffer) {
int len = buffer.readInt();
if (buffer.remaining() <= len) {
throw new IllegalArgumentException(
"Incomplete buffer. Must contain "
+ len
+ " bytes, "
+ "but only "
+ buffer.remaining()
+ " were found.");
}
byte[] bytes = new byte[len];
buffer.read(bytes);
return new String(bytes);
}
private boolean tryEmit(Buffer buffer) {
IN next;
Iterator<Buffer.View> views = codec.iterateDecode(buffer, decoderContext);
if (!views.hasNext()) {
combine(buffer);
return false;
}
Buffer.View cursor;
while (views.hasNext()) {
cursor = views.next();
if (cursor != null) {
next = codec.decodeNext(cursor.get(), decoderContext);
if (next != null && BackpressureUtils.getAndSub(PENDING_UPDATER, this, 1L) > 0) {
subscriber.onNext(next);
} else {
combine(buffer.slice(cursor.getStart(), buffer.limit()));
return next != null;
}
} else {
combine(buffer);
return false;
}
}
if (buffer.remaining() > 0) {
combine(buffer);
return false;
}
return true;
}
/**
* Very efficient method for parsing an {@link Integer} from the given {@literal Buffer}. Much
* faster than {@link Integer#parseInt(String)}.
*
* @param b The {@literal Buffer} to slice.
* @return The int value or {@literal null} if the {@literal Buffer} could not be read.
*/
public static Integer parseInt(Buffer b) {
if (b.remaining() == 0) {
return null;
}
b.snapshot();
int len = b.remaining();
int num = 0;
int dec = 1;
for (int i = (b.position + len); i > b.position; ) {
char c = (char) b.buffer.get(--i);
num += Character.getNumericValue(c) * dec;
dec *= 10;
}
b.reset();
return num;
}
/**
* Append the given {@link Buffer} to this {@literal Buffer}.
*
* @param buffers The {@link Buffer Buffers} to append.
* @return {@literal this}
*/
public Buffer append(Buffer... buffers) {
if (buffers == null) return this;
for (Buffer b : buffers) {
if (b == null) continue;
int pos = position();
int len = b.remaining();
ensureCapacity(len);
if (b.byteBuffer() != null) {
buffer.put(b.byteBuffer());
buffer.position(pos + len);
}
}
return this;
}
@Override
public Buffer.View next() {
int limit = buffer.limit();
int endchunk = canDecodeNext(buffer, context);
if (endchunk == -1) {
return null;
}
Buffer.View view = buffer.createView(buffer.position(), endchunk);
if (buffer.remaining() > 0) {
buffer.position(Math.min(limit, view.getEnd()));
buffer.limit(limit);
}
return view;
}
/**
* Very efficient method for parsing a {@link Long} from the given {@literal Buffer}. Much faster
* than {@link Long#parseLong(String)}.
*
* @param b The {@literal Buffer} to slice.
* @return The long value or {@literal null} if the {@literal Buffer} could not be read.
*/
public static Long parseLong(Buffer b) {
if (b.remaining() == 0) {
return null;
}
ByteBuffer bb = b.buffer;
int origPos = bb.position();
int len = bb.remaining();
long num = 0;
int dec = 1;
for (int i = len; i > 0; ) {
char c = (char) bb.get(--i);
num += Character.getNumericValue(c) * dec;
dec *= 10;
}
bb.position(origPos);
return num;
}
protected int canDecodeNext(Buffer buffer, Object context) {
return delimiter == null
? (buffer.remaining() > 0 ? buffer.limit() : -1)
: buffer.indexOf(delimiter);
}
@Override
protected int canDecodeNext(Buffer buffer, Object context) {
return buffer.remaining() > 0 ? buffer.limit() : -1;
}
