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/**********************************************************************************************
*
* Asprise Scanning and Imaging API - http://asprise.com/document-scanner-image-pdf/java-scanning-api-overview.html
* Copyright (C) 1998-2018. Asprise Inc.
*
* This file is licensed under the GNU Affero General Public License version 3 as published by
* the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU Affero General Public License. If not, please
* visit .
*
**********************************************************************************************/
package com.asprise.imaging.core.prefs;
public class Base64 {
public static String byteArrayToBase64(byte[] a) {
return byteArrayToBase64(a, false);
}
static String byteArrayToAltBase64(byte[] a) {
return byteArrayToBase64(a, true);
}
private static String byteArrayToBase64(byte[] a, boolean alternate) {
int aLen = a.length;
int numFullGroups = aLen/3;
int numBytesInPartialGroup = aLen - 3*numFullGroups;
int resultLen = 4*((aLen + 2)/3);
StringBuffer result = new StringBuffer(resultLen);
char[] intToAlpha = (alternate ? intToAltBase64 : intToBase64);
int inCursor = 0;
for (int i=0; i> 2]);
result.append(intToAlpha[(byte0 << 4)&0x3f | (byte1 >> 4)]);
result.append(intToAlpha[(byte1 << 2)&0x3f | (byte2 >> 6)]);
result.append(intToAlpha[byte2 & 0x3f]);
}
if (numBytesInPartialGroup != 0) {
int byte0 = a[inCursor++] & 0xff;
result.append(intToAlpha[byte0 >> 2]);
if (numBytesInPartialGroup == 1) {
result.append(intToAlpha[(byte0 << 4) & 0x3f]);
result.append("==");
} else {
int byte1 = a[inCursor++] & 0xff;
result.append(intToAlpha[(byte0 << 4)&0x3f | (byte1 >> 4)]);
result.append(intToAlpha[(byte1 << 2)&0x3f]);
result.append('=');
}
}
return result.toString();
}
private static final char intToBase64[] = {
'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',
'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',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/'
};
private static final char intToAltBase64[] = {
'!', '"', '#', '$', '%', '&', '\'', '(', ')', ',', '-', '.', ':',
';', '<', '>', '@', '[', ']', '^', '`', '_', '{', '|', '}', '~',
'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',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '?'
};
public static byte[] base64ToByteArray(String s) {
return base64ToByteArray(s, false);
}
static byte[] altBase64ToByteArray(String s) {
return base64ToByteArray(s, true);
}
private static byte[] base64ToByteArray(String s, boolean alternate) {
byte[] alphaToInt = (alternate ? altBase64ToInt : base64ToInt);
int sLen = s.length();
int numGroups = sLen/4;
if (4*numGroups != sLen)
throw new IllegalArgumentException(
"String length must be a multiple of four.");
int missingBytesInLastGroup = 0;
int numFullGroups = numGroups;
if (sLen != 0) {
if (s.charAt(sLen-1) == '=') {
missingBytesInLastGroup++;
numFullGroups--;
}
if (s.charAt(sLen-2) == '=')
missingBytesInLastGroup++;
}
byte[] result = new byte[3*numGroups - missingBytesInLastGroup];
int inCursor = 0, outCursor = 0;
for (int i=0; i> 4));
result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2));
result[outCursor++] = (byte) ((ch2 << 6) | ch3);
}
if (missingBytesInLastGroup != 0) {
int ch0 = base64toInt(s.charAt(inCursor++), alphaToInt);
int ch1 = base64toInt(s.charAt(inCursor++), alphaToInt);
result[outCursor++] = (byte) ((ch0 << 2) | (ch1 >> 4));
if (missingBytesInLastGroup == 1) {
int ch2 = base64toInt(s.charAt(inCursor++), alphaToInt);
result[outCursor++] = (byte) ((ch1 << 4) | (ch2 >> 2));
}
}
return result;
}
private static int base64toInt(char c, byte[] alphaToInt) {
int result = alphaToInt[c];
if (result < 0)
throw new IllegalArgumentException("Illegal character " + c);
return result;
}
private static final byte base64ToInt[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54,
55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4,
5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23,
24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34,
35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51
};
private static final byte altBase64ToInt[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1,
2, 3, 4, 5, 6, 7, 8, -1, 62, 9, 10, 11, -1 , 52, 53, 54, 55, 56, 57,
58, 59, 60, 61, 12, 13, 14, -1, 15, 63, 16, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, 17, -1, 18, 19, 21, 20, 26, 27, 28, 29, 30, 31, 32, 33,
34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50,
51, 22, 23, 24, 25
};
public static void main(String args[]) {
int numRuns = Integer.parseInt(args[0]);
int numBytes = Integer.parseInt(args[1]);
java.util.Random rnd = new java.util.Random();
for (int i=0; i