package org.apache.maven.surefire.util.internal;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you 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.

  */

 import org.apache.maven.surefire.util.NestedRuntimeException;

 import java.io.IOException;

 import java.io.OutputStream;

 public class StreamUtils

 {

     public static void toHex( OutputStream target, Integer i )

     {

         if ( i != null )

         {

             toHex( target, i.intValue() );

         }

     }

     /**

      * Convert the integer to an unsigned number.

      *

      * @param target The stream that will receive the encoded value

      * @param i      the value

      */

     public static void toHex( OutputStream target, int i )

     {

         byte[] buf = new byte[32];

         int charPos = 32;

         int radix = 1 << 4;

         int mask = radix - 1;

         do

         {

             buf[--charPos] = (byte) digits[i & mask];

             i >>>= 4;

         }

         while ( i != 0 );

         try

         {

             target.write( buf, charPos, ( 32 - charPos ) );

         } catch (IOException e)

         {

             throw new NestedRuntimeException(e);

         }

     }

     private final static char[] digits =

         { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',

             'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z' };

 }