diff options
Diffstat (limited to 'src/com/github/junrar/crc/RarCRC.java')
| -rw-r--r-- | src/com/github/junrar/crc/RarCRC.java | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/src/com/github/junrar/crc/RarCRC.java b/src/com/github/junrar/crc/RarCRC.java deleted file mode 100644 index 8a778ed..0000000 --- a/src/com/github/junrar/crc/RarCRC.java +++ /dev/null @@ -1,145 +0,0 @@ -/*
- * Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
- * Original author: Edmund Wagner
- * Creation date: 29.05.2007
- *
- * 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 com.github.junrar.crc;
-
-
-/**
- * DOCUMENT ME
- *
- * @author $LastChangedBy$
- * @version $LastChangedRevision$
- */
-public class RarCRC {
-
- private final static int crcTab[];
- static {
- crcTab = new int[256];
- for (int i = 0; i < 256; i++) {
- int c = i;
- for (int j = 0; j < 8; j++){
- if ((c & 1) !=0) {
- c >>>= 1;
- c ^= 0xEDB88320;
- }
- else{
- c >>>= 1;
- }
- }
- crcTab[i] = c;
- }
- }
-
- private RarCRC() {
- }
-
- public static int checkCrc(int startCrc, byte[] data, int offset,
- int count) {
- int size = Math.min(data.length-offset,count);
- // #if defined(LITTLE_ENDIAN) && defined(PRESENT_INT32) &&
- // defined(ALLOW_NOT_ALIGNED_INT)
- /*
- for (int i = 0; (0 < size) && i < data.length - 8
- && ((data[i + 8] & 7) != 0); i++) {
- startCrc = crcTab[(short) (startCrc ^ data[i]) & 0x00FF] ^ (startCrc >>> 8);
- size--;
- }
-
- for (int i = 0; size >= 8; i += 8) {
- startCrc ^= data[i + 0] << 24;
- startCrc ^= data[i + 1] << 16;
- startCrc ^= data[i + 2] << 8;
- startCrc ^= data[i + 3];
-
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
-
- startCrc ^= data[i + 4] << 24;
- startCrc ^= data[i + 5] << 16;
- startCrc ^= data[i + 6] << 8;
- startCrc ^= data[i + 7];
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- startCrc = crcTab[(short) startCrc & 0x00FF] ^ (startCrc >>> 8);
- size -= 8;
- }*/
-
- for (int i = 0; i < size; i++)
- {
-/*
- // (byte)(StartCRC^Data[I])
- int pos = 0; // pos=0x00000000
- pos |= startCrc; // pos=ffffffff
-
- pos ^= data[i]; // data[0]=0x73=115dec --> pos=140
- System.out.println(Integer.toHexString(pos));
-
- // Only last 8 bit because CRCtab has length 256
- pos = pos & 0x000000FF;
- System.out.println("pos:"+pos);
- //startCrc >>>= 8;
-
-
- //StartCRC>>8
- int temp =0;
- temp|=startCrc;
- temp >>>= 8;
- System.out.println("temp:"+Integer.toHexString(temp));
-
-
- startCrc = (crcTab[pos]^temp);
- System.out.println("--"+Integer.toHexString(startCrc));*/
-
- startCrc=(crcTab[((int)((int)startCrc ^
- (int)data[offset+i]))&0xff]^(startCrc>>>8));
-
- //System.out.println(Integer.toHexString(startCrc));
-
- // Original code:
- //StartCRC=CRCTab[(byte)(StartCRC^Data[I])]^(StartCRC>>8);
- }
- return (startCrc);
- }
-
- public static short checkOldCrc(short startCrc, byte[] data, int count) {
- int n = Math.min(data.length, count);
- for (int i = 0; i < n; i++) {
- startCrc = (short) ((short) (startCrc + (short) (data[i]&0x00ff)) & -1);
- startCrc = (short) (((startCrc << 1) | (startCrc >>> 15)) & -1);
- }
- return (startCrc);
- }
-
-// public static void main(String[] args)
-// {
-// RarCRC rc = new RarCRC();
-// //byte[] data = { 0x72, 0x21, 0x1A, 0x07, 0x00};
-//
-// byte[] data = {0x73 ,0x00 ,0x00 ,0x0D ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00 ,0x00};
-//
-// int crc = 0x90CF;
-//
-//
-// int result = rc.checkCrc(0xFFFFffff, data,0,data.length);
-// System.out.println("3: "+Integer.toHexString(~result&0xffff));
-//
-// }
-
-}
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