1 files changed, 69 insertions, 0 deletions
diff --git a/src/app/Splitter/crc32.cpp b/src/app/Splitter/crc32.cpp
new file mode 100644
index 0000000..b6b807b
--- /dev/null
+++ b/src/app/Splitter/crc32.cpp
@@ -0,0 +1,69 @@
+/***************************************************************************
+                          crc32.cpp  -  description
+                             -------------------
+    copyright            : (C) 2003 by Csaba Karai
+    e-mail               : krusader@users.sourceforge.net
+    web site             : http://krusader.sourceforge.net
+ ---------------------------------------------------------------------------
+  Description
+ ***************************************************************************
+
+  A
+
+     db   dD d8888b. db    db .d8888.  .d8b.  d8888b. d88888b d8888b.
+     88 ,8P' 88  `8D 88    88 88'  YP d8' `8b 88  `8D 88'     88  `8D
+     88,8P   88oobY' 88    88 `8bo.   88ooo88 88   88 88ooooo 88oobY'
+     88`8b   88`8b   88    88   `Y8b. 88~~~88 88   88 88~~~~~ 88`8b
+     88 `88. 88 `88. 88b  d88 db   8D 88   88 88  .8D 88.     88 `88.
+     YP   YD 88   YD ~Y8888P' `8888Y' YP   YP Y8888D' Y88888P 88   YD
+
+                                                     S o u r c e    F i l e
+
+ ***************************************************************************
+ *                                                                         *
+ *   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; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "crc32.h"
+
+#define MASK1       0x00FFFFFF
+#define MASK2       0xFFFFFFFF
+#define POLYNOMIAL  0xEDB88320
+
+bool            CRC32::crc_initialized = false;
+unsigned long   CRC32::crc_table[ 256 ];
+
+CRC32::CRC32( unsigned long initialValue )
+{
+    crc_accum = initialValue;
+
+    if( !crc_initialized )
+    {
+        for( int byte = 0; byte != 256; byte++ )
+        {
+            unsigned long data = byte;
+
+            for( int i = 8; i > 0 ; --i )
+                data = data & 1 ? ( data >> 1 ) ^ POLYNOMIAL : data >> 1;
+
+            crc_table[ byte ] = data;
+        }
+
+        crc_initialized = true;
+    }
+}
+
+void CRC32::update( unsigned char *buffer, int bufferLen )
+{
+    while( bufferLen-- > 0 )
+       crc_accum = ( (crc_accum >> 8) & MASK1 ) ^ crc_table[ (crc_accum & 0xff) ^ *buffer++ ];
+}
+
+unsigned long CRC32::result()
+{
+    return ( ~crc_accum ) & MASK2;
+}