1 files changed, 27 insertions, 0 deletions
diff --git a/hostTools/lzma/compress/CRC.h b/hostTools/lzma/compress/CRC.h
new file mode 100644
index 0000000..cbef4b6
--- /dev/null
+++ b/hostTools/lzma/compress/CRC.h
@@ -0,0 +1,27 @@
+#ifndef __COMMON_CRC_H
+#define __COMMON_CRC_H
+
+#include "Portable.h"
+
+class CCRC
+{
+  UINT32 m_Value;
+public:
+	static UINT32 m_Table[256];
+  CCRC():  m_Value(0xFFFFFFFF){};
+  void Init() { m_Value = 0xFFFFFFFF; }
+  void Update(const void *aData, UINT32 aSize);
+  UINT32 GetDigest() const { return m_Value ^ 0xFFFFFFFF; } 
+  static UINT32 CalculateDigest(const void *aData, UINT32 aSize)
+  {
+    CCRC aCRC;
+    aCRC.Update(aData, aSize);
+    return aCRC.GetDigest();
+  }
+  static bool VerifyDigest(UINT32 aDigest, const void *aData, UINT32 aSize)
+  {
+    return (CalculateDigest(aData, aSize) == aDigest);
+  }
+};
+
+#endif