- First LZMA enhanced NSIS version - experimental

- Added SetCompressorDictSize (only works for LZMA)
- Added SetCompressionLevel (only "works" for zlib and bzip2) - doesn't work for now
- Section is only supposed to get 4 parameters if /o is specified
- Updated version numbers


git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@3190 212acab6-be3b-0410-9dea-997c60f758d6

Source/7zip/Common/CRC.h

@@ -0,0 +1,31 @@
+// Common/CRC.h
+
+// #pragma once
+
+#ifndef __COMMON_CRC_H
+#define __COMMON_CRC_H
+
+#include "Types.h"
+
+class CCRC
+{
+  UINT32 _value;
+public:
+	static UINT32 Table[256];
+  CCRC():  _value(0xFFFFFFFF){};
+  void Init() { _value = 0xFFFFFFFF; }
+  void Update(const void *data, UINT32 size);
+  UINT32 GetDigest() const { return _value ^ 0xFFFFFFFF; } 
+  static UINT32 CalculateDigest(const void *data, UINT32 size)
+  {
+    CCRC crc;
+    crc.Update(data, size);
+    return crc.GetDigest();
+  }
+  static bool VerifyDigest(UINT32 digest, const void *data, UINT32 size)
+  {
+    return (CalculateDigest(data, size) == digest);
+  }
+};
+
+#endif