/*
* Copyright (c) 2013, OpenCloudDB/MyCAT and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software;Designed and Developed mainly by many Chinese
* opensource volunteers. you can redistribute it and/or modify it under the
* terms of the GNU General Public License version 2 only, as published by the
* Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Any questions about this component can be directed to it's project Web address
* https://code.google.com/p/opencloudb/.
*
*/
package org.opencloudb.mysql;
import io.netty.buffer.ByteBuf;
import java.nio.ByteBuffer;
/**
* @author mycat
*/
public class BufferUtil {
public static final void writeUB2(ByteBuffer buffer, int i) {
buffer.put((byte) (i & 0xff));
buffer.put((byte) (i >>> 8));
}
public static final void writeUB2(ByteBuf buffer, int i) {
buffer.writeByte((byte) (i & 0xff));
buffer.writeByte((byte) (i >>> 8));
}
public static final void writeUB3(ByteBuffer buffer, int i) {
buffer.put((byte) (i & 0xff));
buffer.put((byte) (i >>> 8));
buffer.put((byte) (i >>> 16));
}
public static final void writeUB3(ByteBuf buffer, int i) {
buffer.writeByte((byte) (i & 0xff));
buffer.writeByte((byte) (i >>> 8));
buffer.writeByte((byte) (i >>> 16));
}
public static final void writeInt(ByteBuffer buffer, int i) {
buffer.put((byte) (i & 0xff));
buffer.put((byte) (i >>> 8));
buffer.put((byte) (i >>> 16));
buffer.put((byte) (i >>> 24));
}
public static final void writeFloat(ByteBuffer buffer, float f) {
writeInt(buffer, Float.floatToIntBits(f));
}
public static final void writeUB4(ByteBuffer buffer, long l) {
buffer.put((byte) (l & 0xff));
buffer.put((byte) (l >>> 8));
buffer.put((byte) (l >>> 16));
buffer.put((byte) (l >>> 24));
}
public static final void writeUB4(ByteBuf buffer, long l) {
buffer.writeByte((byte) (l & 0xff));
buffer.writeByte((byte) (l >>> 8));
buffer.writeByte((byte) (l >>> 16));
buffer.writeByte((byte) (l >>> 24));
}
public static final void writeLong(ByteBuffer buffer, long l) {
buffer.put((byte) (l & 0xff));
buffer.put((byte) (l >>> 8));
buffer.put((byte) (l >>> 16));
buffer.put((byte) (l >>> 24));
buffer.put((byte) (l >>> 32));
buffer.put((byte) (l >>> 40));
buffer.put((byte) (l >>> 48));
buffer.put((byte) (l >>> 56));
}
public static final void writeLong(ByteBuf buffer, long l) {
buffer.writeByte((byte) (l & 0xff));
buffer.writeByte((byte) (l >>> 8));
buffer.writeByte((byte) (l >>> 16));
buffer.writeByte((byte) (l >>> 24));
buffer.writeByte((byte) (l >>> 32));
buffer.writeByte((byte) (l >>> 40));
buffer.writeByte((byte) (l >>> 48));
buffer.writeByte((byte) (l >>> 56));
}
public static final void writeDouble(ByteBuffer buffer, double d) {
writeLong(buffer, Double.doubleToLongBits(d));
}
public static final void writeLength(ByteBuffer buffer, long l) {
if (l < 251) {
buffer.put((byte) l);
} else if (l < 0x10000L) {
buffer.put((byte) 252);
writeUB2(buffer, (int) l);
} else if (l < 0x1000000L) {
buffer.put((byte) 253);
writeUB3(buffer, (int) l);
} else {
buffer.put((byte) 254);
writeLong(buffer, l);
}
}
public static final void writeLength(ByteBuf buffer, long l) {
if (l < 251) {
buffer.writeByte((byte) l);
} else if (l < 0x10000L) {
buffer.writeByte((byte) 252);
writeUB2(buffer, (int) l);
} else if (l < 0x1000000L) {
buffer.writeByte((byte) 253);
writeUB3(buffer, (int) l);
} else {
buffer.writeByte((byte) 254);
writeLong(buffer, l);
}
}
public static final void writeWithNull(ByteBuffer buffer, byte[] src) {
buffer.put(src);
buffer.put((byte) 0);
}
public static final void writeWithNull(ByteBuf buffer, byte[] src) {
buffer.writeBytes(src);
buffer.writeByte((byte) 0);
}
public static final void writeWithLength(ByteBuffer buffer, byte[] src) {
int length = src.length;
if (length < 251) {
buffer.put((byte) length);
} else if (length < 0x10000L) {
buffer.put((byte) 252);
writeUB2(buffer, length);
} else if (length < 0x1000000L) {
buffer.put((byte) 253);
writeUB3(buffer, length);
} else {
buffer.put((byte) 254);
writeLong(buffer, length);
}
buffer.put(src);
}
public static final void writeWithLength(ByteBuf buffer, byte[] src) {
int length = src.length;
if (length < 251) {
buffer.writeByte((byte) length);
} else if (length < 0x10000L) {
buffer.writeByte((byte) 252);
writeUB2(buffer, length);
} else if (length < 0x1000000L) {
buffer.writeByte((byte) 253);
writeUB3(buffer, length);
} else {
buffer.writeByte((byte) 254);
writeLong(buffer, length);
}
buffer.writeBytes(src);
}
public static final void writeWithLength(ByteBuffer buffer, byte[] src,
byte nullValue) {
if (src == null) {
buffer.put(nullValue);
} else {
writeWithLength(buffer, src);
}
}
public static final void writeWithLength(ByteBuf buffer, byte[] src,
byte nullValue) {
if (src == null) {
buffer.writeByte(nullValue);
} else {
writeWithLength(buffer, src);
}
}
public static final int getLength(long length) {
if (length < 251) {
return 1;
} else if (length < 0x10000L) {
return 3;
} else if (length < 0x1000000L) {
return 4;
} else {
return 9;
}
}
public static final int getLength(byte[] src) {
int length = src.length;
if (length < 251) {
return 1 + length;
} else if (length < 0x10000L) {
return 3 + length;
} else if (length < 0x1000000L) {
return 4 + length;
} else {
return 9 + length;
}
}
}