4.44 beta

CPP/7zip/Compress/BZip2/BZip2CRC.cpp

@@ -0,0 +1,26 @@
+// BZip2CRC.cpp
+
+#include "StdAfx.h"
+
+#include "BZip2CRC.h"
+
+UInt32 CBZip2CRC::Table[256];
+
+static const UInt32 kBZip2CRCPoly = 0x04c11db7;  /* AUTODIN II, Ethernet, & FDDI */
+
+void CBZip2CRC::InitTable()
+{
+  for (UInt32 i = 0; i < 256; i++)
+  {
+    UInt32 r = (i << 24);
+    for (int j = 8; j > 0; j--)
+      r = (r & 0x80000000) ? ((r << 1) ^ kBZip2CRCPoly) : (r << 1);
+    Table[i] = r;
+  }
+}
+
+class CBZip2CRCTableInit
+{
+public:
+  CBZip2CRCTableInit() { CBZip2CRC::InitTable(); }
+} g_BZip2CRCTableInit;