Mega Code Archive
Byte Convert
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/*
* ByteConvert.java
*
* Created on Sep 16, 2010, 5:30 PM
*************************************************************************
* Copyright 2010 Kevin Kendall
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//package ao.misc;
public class ByteConvert {
public static int swap(int id){
byte[] a = intToByte(id);
byte[] b = new byte[a.length];
for(int i=0; i<a.length; i++){
b[a.length-i-1] = a[i];
}
return byteToInt(b);
}
public static byte[] intToByte(int id) {
byte[] b = new byte[4];
b[0] = (byte) (id >> 24);
b[1] = (byte) ((id << 8) >> 24);
b[2] = (byte) ((id << 16) >> 24);
b[3] = (byte) ((id << 24) >> 24);
return b;
}
public static int byteToInt(byte[] id) {
int newid = 0;
for(int i = 0; i<id.length; i++){
newid += unsignedByteToInt(id[i]) << (8*id.length-i);
}
return newid;
/**
int i = 0;
int pos = 0;
i += unsignedByteToInt(id[pos++]) << 24;
i += unsignedByteToInt(id[pos++]) << 16;
i += unsignedByteToInt(id[pos++]) << 8;
i += unsignedByteToInt(id[pos++]) << 0;
return i;
**/
}
public static int unsignedByteToInt(byte b) {
return (int) b & 0xFF;
}
}
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