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/**
* *****************************************************************************
*
* Design and Development by msg Applied Technology Research Copyright (c) 2019-2020 msg systems
* ag (http://www.msg-systems.com/) All Rights Reserved.
*
*
Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute,
* sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
*
The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
*
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*
****************************************************************************
*/
package com.graphqlio.uuid.helpers;
import com.graphqlio.uuid.domain.GlobaleConstants;
/**
* Encoder.
*
* @author Michael Schüfer
* @author Ahmed Amedlous
* @author Dr. Edgar Müller
*/
public class Encode {
/**
* decodes data in the Base85 encoding scheme Z85.
*
* @param data (encoded data)
* @param size of data
* @return the result string from the Z85 encoder
* @throws Exception (invalid input length (multiple of 4 expected))
*/
public static String getZ85Encode(long[] data, int size) throws Exception {
if ((size % 4) != 0) {
throw new Exception("z85_encode: invalid input length (multiple of 4 expected)");
}
String str = "";
long i = 0;
long value = 0;
while (i < size) {
value = (value * 256) + data[(int) i++];
if ((i % 4) == 0) {
int divisor = 85 * 85 * 85 * 85;
while (divisor >= 1) {
int idx = (int) (Math.floor(value / divisor) % 85);
// sometime idx kommt negative
if (idx > 0) {
str += GlobaleConstants.Z85_ENCODER[idx];
}
divisor /= 85;
}
value = 0;
}
}
return str;
}
}