// 
// Decompiled by Procyon v0.6.0
// 

package io.netty.channel.unix;

import io.netty.buffer.ByteBufAllocator;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.buffer.Unpooled;
import java.io.IOException;
import java.nio.ByteBuffer;
import io.netty.util.internal.ObjectUtil;
import java.nio.channels.WritableByteChannel;

public abstract class SocketWritableByteChannel implements WritableByteChannel
{
    protected final FileDescriptor fd;
    
    protected SocketWritableByteChannel(final FileDescriptor fd) {
        this.fd = ObjectUtil.checkNotNull(fd, "fd");
    }
    
    protected int write(final ByteBuffer buf, final int pos, final int limit) throws IOException {
        return this.fd.write(buf, pos, limit);
    }
    
    @Override
    public final int write(final ByteBuffer src) throws IOException {
        final int position = src.position();
        final int limit = src.limit();
        int written;
        if (src.isDirect()) {
            written = this.write(src, position, src.limit());
        }
        else {
            final int readableBytes = limit - position;
            ByteBuf buffer = null;
            try {
                if (readableBytes == 0) {
                    buffer = Unpooled.EMPTY_BUFFER;
                }
                else {
                    final ByteBufAllocator alloc = this.alloc();
                    if (alloc.isDirectBufferPooled()) {
                        buffer = alloc.directBuffer(readableBytes);
                    }
                    else {
                        buffer = ByteBufUtil.threadLocalDirectBuffer();
                        if (buffer == null) {
                            buffer = Unpooled.directBuffer(readableBytes);
                        }
                    }
                }
                buffer.writeBytes(src.duplicate());
                final ByteBuffer nioBuffer = buffer.internalNioBuffer(buffer.readerIndex(), readableBytes);
                written = this.write(nioBuffer, nioBuffer.position(), nioBuffer.limit());
            }
            finally {
                if (buffer != null) {
                    buffer.release();
                }
            }
        }
        if (written > 0) {
            src.position();
        }
        return written;
    }
    
    @Override
    public final boolean isOpen() {
        return this.fd.isOpen();
    }
    
    @Override
    public final void close() throws IOException {
        this.fd.close();
    }
    
    protected abstract ByteBufAllocator alloc();
}