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/*
*
* Original author: alpha_lam
* Creation date: ?
*
* Source: $HeadURL$
* Last changed: $LastChangedDate$
*
*
* the unrar licence applies to all junrar source and binary distributions
* you are not allowed to use this source to re-create the RAR compression algorithm
*
* Here some html entities which can be used for escaping javadoc tags:
* "&": "&" or "&"
* "<": "<" or "<"
* ">": ">" or ">"
* "@": "@"
*/
package org.fox.ttcomics2.junrar.rarfile;
public class FileNameDecoder {
public static int getChar(byte[] name, int pos) {
return name[pos] & 0xff;
}
public static String decode(byte[] name, int encPos) {
int decPos = 0;
int flags = 0;
int flagBits = 0;
int low = 0;
int high = 0;
int highByte = getChar(name, encPos++);
StringBuffer buf = new StringBuffer();
while (encPos < name.length) {
if (flagBits == 0) {
flags = getChar(name, encPos++);
flagBits = 8;
}
switch (flags >> 6) {
case 0:
buf.append((char) (getChar(name, encPos++)));
++decPos;
break;
case 1:
buf.append((char) (getChar(name, encPos++) + (highByte << 8)));
++decPos;
break;
case 2:
low = getChar(name, encPos);
high = getChar(name, encPos + 1);
buf.append((char) ((high << 8) + low));
++decPos;
encPos += 2;
break;
case 3:
int length = getChar(name, encPos++);
if ((length & 0x80) != 0) {
int correction = getChar(name, encPos++);
for (length = (length & 0x7f) + 2; length > 0 && decPos < name.length; length--, decPos++) {
low = (getChar(name, decPos) + correction) & 0xff;
buf.append((char) ((highByte << 8) + low));
}
} else {
for (length += 2; length > 0 && decPos < name.length; length--, decPos++) {
buf.append((char) (getChar(name, decPos)));
}
}
break;
}
flags = (flags << 2) & 0xff;
flagBits -= 2;
}
return buf.toString();
}
}
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