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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package netscape.security.util;
import sun.io.*;
/**
* Converts bytes in ASN.1 UniversalString character set to unicode
* characters.
*
* @author Lily Hsiao
* @author Slava Galperin
*/
public class ByteToCharUniversalString extends ByteToCharConverter
{
public String getCharacterEncoding() {
return "ASN.1 UniversalString";
}
public int convert(byte[] input, int inStart, int inEnd,
char[] output, int outStart, int outEnd)
throws ConversionBufferFullException,
UnknownCharacterException
{
int j = outStart;
int i = inStart;
while(i < inEnd) {
// XXX we do not know what to do with truly UCS-4 characters here
// we also assumed network byte order
if ( i+3 >= inEnd ||
(!((input[i] == 0 && input[i+1] == 0) ||
(input[i+2] == 0 && input[i+3] == 0)))) {
byteOff = i;
charOff = j;
throw new UnknownCharacterException();
}
if (input[i+2] == 0 && input[i+3] == 0) {
// Try to be a bit forgiving. If the byte order is
// reversed, we still try handle it.
// Sample Date Set (1):
// 0000000 f 0 \0 \0 213 0 \0 \0 S 0 \0 \0
// 0000014
// Sample Date Set (2):
// 0000000 w \0 \0 \0 w \0 \0 \0 w \0 \0 \0 . \0 \0 \0
// 0000020 ( \0 \0 \0 t \0 \0 \0 o \0 \0 \0 b \0 \0 \0
// 0000040 e \0 \0 \0 | \0 \0 \0 n \0 \0 \0 o \0 \0 \0
// 0000060 t \0 \0 \0 t \0 \0 \0 o \0 \0 \0 b \0 \0 \0
// 0000100 e \0 \0 \0 ) \0 \0 \0 . \0 \0 \0 c \0 \0 \0
// 0000120 o \0 \0 \0 m \0 \0 \0
// 0000130
output[j] = (char)(((input[i+1] << 8)& 0xff00) + (input[i] & 0x00ff));
} else {
// This should be the right order.
//
// 0000000 0000 00c4 0000 0064 0000 006d 0000 0069
// 0000020 0000 006e 0000 0020 0000 0051 0000 0041
// 0000040
// (input[i] == 0 && input[i+1] == 0)
output[j] = (char)(((input[i+2] << 8)& 0xff00) + (input[i+3] & 0x00ff));
}
j++;
i += 4;
}
byteOff = inEnd;
charOff = j;
return j - outStart;
}
public int flush(char[] output, int outStart, int outEnd) {
return 0;
}
public void reset() { }
}
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