1 files changed, 62 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/util/IA5CharsetDecoder.java b/base/util/src/netscape/security/util/IA5CharsetDecoder.java
new file mode 100644
index 000000000..620d65aca
--- /dev/null
+++ b/base/util/src/netscape/security/util/IA5CharsetDecoder.java
@@ -0,0 +1,62 @@
+// --- 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.CharsetDecoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+
+/**
+ * Converts bytes in ASN.1 IA5String character set to IA5String characters.
+ * 
+ * @author Lily Hsiao
+ * @author Slava Galperin
+ */
+
+public class IA5CharsetDecoder extends CharsetDecoder {
+
+    public IA5CharsetDecoder(Charset cs) {
+        super(cs, 1, 1);
+    }
+
+    protected CoderResult decodeLoop(ByteBuffer in, CharBuffer out) {
+
+        while (true) {
+
+            if (in.remaining() < 1)
+                return CoderResult.UNDERFLOW;
+
+            in.mark();
+            byte b = in.get();
+
+            if (CodingErrorAction.REPORT == unmappableCharacterAction() && (b & 0x80) != 0) {
+                return CoderResult.unmappableForLength(1);
+            }
+
+            if (out.remaining() < 1) {
+                in.reset();
+                return CoderResult.OVERFLOW;
+            }
+
+            out.put((char) (b & 0x7f));
+        }
+    }
+}