public static int prepend(IByteSequence src, int offset, int length, IUnit unit) {
int start = unit.start();
if (length > start) {
offset += length - start;
length = start;
}
start -= length;
unit.set(start, src, offset, offset + length);
unit.start(start);
unit.size(unit.size() + length);
return length;
}
public static void write(ICharsetCodec cc, CharBuffer cb, IUnitChain unitChain) {
final CharsetEncoder encoder = cc.getEncoder();
try {
IUnit unit = Util.lastUnit(unitChain);
ByteBuffer bb = unit.getByteBufferForWrite();
boolean flush = false;
encoder.reset();
for (; ; ) {
CoderResult cr = flush ? encoder.flush(bb) : encoder.encode(cb, bb, true);
unit.size(bb.position() - unit.start());
if (cr.isOverflow()) {
unit = Util.appendNewUnit(unitChain);
bb = unit.getByteBufferForWrite();
continue;
}
if (!cr.isUnderflow()) cr.throwException();
if (flush) break;
else flush = true;
}
} catch (CharacterCodingException e) {
throw new RuntimeException(e);
} finally {
cc.releaseEncoder(encoder);
}
}