diff options
Diffstat (limited to 'base/util/src/netscape/security/util/CharToBytePrintable.java')
-rw-r--r-- | base/util/src/netscape/security/util/CharToBytePrintable.java | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/base/util/src/netscape/security/util/CharToBytePrintable.java b/base/util/src/netscape/security/util/CharToBytePrintable.java new file mode 100644 index 000000000..09b3afefe --- /dev/null +++ b/base/util/src/netscape/security/util/CharToBytePrintable.java @@ -0,0 +1,122 @@ +// --- 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.CharToByteConverter; +import sun.io.ConversionBufferFullException; +import sun.io.UnknownCharacterException; +import sun.io.MalformedInputException; + +/** + * Converts a string of ASN.1 PrintableString characters to PrintableString + * bytes. + * + * @author Lily Hsiao + * @author Slava Galperin + */ + +public class CharToBytePrintable extends CharToByteConverter +{ + /* + * returns the character set id for the conversion. + * @return the character set id. + */ + public String getCharacterEncoding() + { + return "ASN.1 Printable"; + } + + public static boolean isPrintableChar( char c ) + { + if ((c < 'A' || c > 'Z') && + (c < 'a' || c > 'z') && + (c < '0' || c > '9') && + (c != ' ') && + (c != '\'') && + (c != '(') && + (c != ')') && + (c != '+') && + (c != ',') && + (c != '-') && + (c != '.') && + (c != '/') && + (c != ':') && + (c != '=') && + (c != '?')) + { + return false; + } else { + return true; + } + } + + /* + * Converts an array of Unicode characters into an array of Printable + * String bytes and returns the total number of characters converted. + * If conversion cannot be done, UnknownCharacterException is + * thrown. The character and byte offset will be set to the point + * of the unknown character. + * @param input character array to convert. + * @param inStart offset from which to start the conversion. + * @param inEnd where to end the conversion. + * @param output byte array to store converted bytes. + * @param outStart starting offset in the output byte array. + * @param outEnd ending offset in the output byte array. + * @return the number of characters converted. + */ + public int convert(char[] input, int inStart, int inEnd, + byte[] output, int outStart, int outEnd) + throws MalformedInputException, UnknownCharacterException, + ConversionBufferFullException + { + int j = outStart; + int i; + for (i = inStart; i < inEnd ; i++, j++) + { + if (j >= outEnd) { + charOff = i; + byteOff = j; + throw new ConversionBufferFullException(); + } + if (!subMode && !isPrintableChar(input[i])) { + charOff = i; + byteOff = j; + badInputLength = 1; + throw new UnknownCharacterException(); + } + output[j] = (byte) (input[i] & 0x7f); + } + charOff = i; + byteOff = j; + return j - outStart; + } + + public int flush(byte[] output, int outStart, int outEnd) + throws MalformedInputException, ConversionBufferFullException + { + return 0; + } + + public void reset() { } + + public int getMaxBytesPerChar() + { + return 1; + } + +} |