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/*
========== licence begin GPL
Copyright (C) 2002-2003 SAP AG
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
========== licence end
*/
package com.sap.dbtech.util;
/**
*
*/
public class UnicodeUtil {
public static final int CharWidthC = 2;
/**
* UnicodeUtil is all static
*/
private UnicodeUtil () {
}
/**
*
*/
static public char []
bigUnicode2Chars (
byte [] b,
int off,
int len)
{
char [] result = new char [len/2];
int lenInChars = len / 2;
for (int i = 0; i < lenInChars; ++i) {
int high = b [off + (2 * i)];
if (high < 0) {
high += 256;
}
int low = b [off + ((2 * i) + 1)];
if (low < 0) {
low += 256;
}
int current = (high << 8) + low;
result [i] = (char) current;
}
return result;
}
/**
*
*/
static public char []
bigUnicode2Chars (
byte [] b)
{
return bigUnicode2Chars (b, 0, b.length);
}
/**
*
*/
static private boolean encodingAvailable = true;
static public String bigUnicode2String (byte[] input) {
String result;
if (encodingAvailable) {
try {
/*works only for jdk`s >= 1.3*/
result = new String(input, "UTF-16BE");
}
catch (java.io.UnsupportedEncodingException UEEexp) {
result = new String (bigUnicode2Chars (input));
encodingAvailable = false;
}
}
else {
result = new String (bigUnicode2Chars (input));
}
return result;
}
/**
*
*/
static public byte[] char2BigUnicode (char[] input) {
byte[] result = new byte[input.length*2];
charIntoBytes(input, result, 0);
return result;
}
/**
*
*/
static public byte[] bytes2BigUnicode (byte[] input) {
int byteCount = input.length;
byte[] result = new byte[byteCount*2];
for (int i = 0; i < byteCount; ++i) {
result[i*2 + 1] = input[i];
}
return result;
} /**
*
*/
static public void charIntoBytes (char[] input, byte[] output, int byteOffset) {
int charCount = input.length;
for (int i = 0; i < charCount; ++i) {
char current = input[i];
output[i*2 + byteOffset] = (byte)(current/256);
output[i*2 + byteOffset + 1] = (byte)(current%256);
}
}
}
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