/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman <swaldman@mchange.com>
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.lang;
import java.io.
StringWriter;
public final class
CharUtils
{
public static int
charFromByteArray(byte[]
bytes, int
offset)
{
int
out = 0;
out |= ((int)
ByteUtils.
toUnsigned(
bytes[
offset + 0])) << 8;
out |= ((int)
ByteUtils.
toUnsigned(
bytes[
offset + 1])) << 0;
return
out;
}
public static byte[]
byteArrayFromChar(char
i)
{
byte[]
out = new byte[2];
charIntoByteArray(
i, 0,
out);
return
out;
}
public static void
charIntoByteArray(int
i, int
offset, byte[]
bytes)
{
bytes[
offset + 0] = (byte) ((
i >>> 8) & 0xFF);
bytes[
offset + 1] = (byte) ((
i >>> 0) & 0xFF);
}
public static
String toHexAscii(char
c)
{
StringWriter sw = new
StringWriter(4);
ByteUtils.
addHexAscii((byte) ((
c >>> 8) & 0xFF),
sw);
ByteUtils.
addHexAscii((byte) (
c & 0xFF),
sw);
return
sw.
toString();
}
public static char[]
fromHexAscii(
String s )
{
int
len =
s.
length();
if ((
len % 4) != 0)
throw new
NumberFormatException("Hex ascii must be exactly four digits per char.");
byte[]
bytes =
ByteUtils.
fromHexAscii(
s );
int
out_len =
len / 4;
char[]
out = new char[
out_len];
for (int
i = 0;
len <
out_len; ++
i)
out[
i] = (char)
charFromByteArray(
bytes, (
i * 2) );
return
out;
}
private
CharUtils()
{}
}