diff options
Diffstat (limited to 'base/util/src/netscape/security/util/UniversalCharsetEncoder.java')
-rw-r--r-- | base/util/src/netscape/security/util/UniversalCharsetEncoder.java | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/util/UniversalCharsetEncoder.java b/base/util/src/netscape/security/util/UniversalCharsetEncoder.java new file mode 100644 index 000000000..cd2a51296 --- /dev/null +++ b/base/util/src/netscape/security/util/UniversalCharsetEncoder.java @@ -0,0 +1,68 @@ +// --- 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 java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.Charset; +import java.nio.charset.CharsetEncoder; +import java.nio.charset.CoderResult; + +/** + * Converts characters in ASN.1 UniversalString character set to UniversalString + * bytes. + * + * @author Lily Hsiao + * @author Slava Galperin + */ + +public class UniversalCharsetEncoder extends CharsetEncoder { + + public UniversalCharsetEncoder(Charset cs) { + super(cs, 4, 4, new byte[] { 0, 0, 0, 0 }); + } + + /* + * Converts an array of Unicode characters into an array of UniversalString + * bytes and returns the conversion result. + * @param in input character buffer to convert. + * @param out byte buffer to store output. + * @return encoding result. + */ + protected CoderResult encodeLoop(CharBuffer in, ByteBuffer out) { + + while (true) { + + if (in.remaining() < 1) + return CoderResult.UNDERFLOW; + + in.mark(); + char c = in.get(); + + if (out.remaining() < 4) { + in.reset(); + return CoderResult.OVERFLOW; + } + + out.put((byte) 0); + out.put((byte) 0); + out.put((byte) ((c >> 8) & 0xff)); + out.put((byte) (c & 0xff)); + } + } +} |