File	Doc	Category	Size	Date	Package
BASE64MailboxDecoder.java	API Doc	Glassfish v2 API	6266	Mon May 14 15:28:44 BST 2007	com.sun.mail.imap.protocol

BASE64MailboxDecoder

• java.lang.Object

Fields Summary
static final char[]	pem_array This character array provides the character to value map based on RFC1521, but with the modification from RFC2060 which changes the '/' to a ','.
private static final byte[]	pem_convert_array

Constructors Summary

Methods Summary
protected static int	base64decode(char[] buffer, int offset, java.text.CharacterIterator iter) boolean firsttime = true; int leftover = -1; char testing = 0; while(true) { // get the first byte byte orig_0 = (byte) iter.next(); if (orig_0 == -1) break; // no more chars if (orig_0 == '-") { if (firsttime) { // means we got the string "&-" which is turned into a "&" buffer[offset++] = '&"; } // we are done now break; } firsttime = false; // next byte byte orig_1 = (byte) iter.next(); if (orig_1 == -1 || orig_1 == '-") break; // no more chars, invalid base64 byte a, b, current; a = pem_convert_array[orig_0 & 0xff]; b = pem_convert_array[orig_1 & 0xff]; // The first decoded byte current = (byte)(((a << 2) & 0xfc) | ((b >>> 4) & 3)); // use the leftover to create a Unicode Character (2 bytes) if (leftover != -1) { buffer[offset++] = (char)(leftover << 8 | (current & 0xff)); leftover = -1; } else { leftover = current & 0xff; } byte orig_2 = (byte) iter.next(); if (orig_2 == '=") { // End of this BASE64 encoding continue; } else if (orig_2 == -1 || orig_2 == '-") { break; // no more chars } // second decoded byte a = b; b = pem_convert_array[orig_2 & 0xff]; current = (byte)(((a << 4) & 0xf0) | ((b >>> 2) & 0xf)); // use the leftover to create a Unicode Character (2 bytes) if (leftover != -1) { buffer[offset++] = (char)(leftover << 8 | (current & 0xff)); leftover = -1; } else { leftover = current & 0xff; } byte orig_3 = (byte) iter.next(); if (orig_3 == '=") { // End of this BASE64 encoding continue; } else if (orig_3 == -1 || orig_3 == '-") { break; // no more chars } // The third decoded byte a = b; b = pem_convert_array[orig_3 & 0xff]; current = (byte)(((a << 6) & 0xc0) | (b & 0x3f)); // use the leftover to create a Unicode Character (2 bytes) if (leftover != -1) { testing = (char)((int)leftover << 8 | ((int) current & 0xff)); buffer[offset++] = (char)(leftover << 8 | (current & 0xff)); leftover = -1; } else { leftover = current & 0xff; } } return offset;
public static java.lang.String	decode(java.lang.String original) if (original == null || original.length() == 0) return original; boolean changedString = false; int copyTo = 0; // it will always be less than the original char[] chars = new char[original.length()]; StringCharacterIterator iter = new StringCharacterIterator(original); for(char c = iter.first(); c != CharacterIterator.DONE; c = iter.next()) { if (c == '&") { changedString = true; copyTo = base64decode(chars, copyTo, iter); } else { chars[copyTo++] = c; } } // now create our string from the char array if (changedString) { return new String(chars, 0, copyTo); } else { return original; }