/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite 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
* Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package ncs;
public class Encoder
{
public String exe(byte[] octetString)
{
final char[] ALPHABET = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', // 0 to 7
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 8 to 15
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 16 to 23
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', // 24 to 31
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', // 32 to 39
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', // 40 to 47
'w', 'x', 'y', 'z', '0', '1', '2', '3', // 48 to 55
'4', '5', '6', '7', '8', '9', '+', '/'}; // 56 to 63
int bits24 =0;
int bits6 =0;
char[] out = new char[((octetString.length - 1) / 3 + 1) * 4];
int outIndex = 0;
int i = 0;
while ((i + 3) <= octetString.length) {
// store the octets
bits24 = (octetString[i++] & 0xFF) << 16;
bits24 |= (octetString[i++] & 0xFF) << 8;
bits24 |= octetString[i++];
bits6 = (bits24 & 0x00FC0000) >> 18;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x0003F000) >> 12;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x00000FC0) >> 6;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x0000003F);
out[outIndex++] = ALPHABET[bits6];
}
if (octetString.length - i == 2) {
// store the octets
bits24 = (octetString[i] & 0xFF) << 16;
bits24 |= (octetString[i + 1] & 0xFF) << 8;
bits6 = (bits24 & 0x00FC0000) >> 18;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x0003F000) >> 12;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x00000FC0) >> 6;
out[outIndex++] = ALPHABET[bits6];
// padding
out[outIndex++] = '=';
} else if (octetString.length - i == 1) {
// store the octets
bits24 = (octetString[i] & 0xFF) << 16;
bits6 = (bits24 & 0x00FC0000) >> 18;
out[outIndex++] = ALPHABET[bits6];
bits6 = (bits24 & 0x0003F000) >> 12;
out[outIndex++] = ALPHABET[bits6];
// padding
out[outIndex++] = '=';
out[outIndex++] = '=';
}
return new String(out);
}
}