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diff --git a/modules/checksum/adler32/adler32.h b/modules/checksum/adler32/adler32.h
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+/*************************************************
+* Adler32 Header File *
+* (C) 1999-2007 Jack Lloyd *
+*************************************************/
+
+#ifndef BOTAN_ADLER32_H__
+#define BOTAN_ADLER32_H__
+
+#include <botan/base.h>
+
+namespace Botan {
+
+/*************************************************
+* Adler32 *
+*************************************************/
+class BOTAN_DLL Adler32 : public HashFunction
+ {
+ public:
+ void clear() throw() { S1 = 1; S2 = 0; }
+ std::string name() const { return "Adler32"; }
+ HashFunction* clone() const { return new Adler32; }
+ Adler32() : HashFunction(4) { clear(); }
+ ~Adler32() { clear(); }
+ private:
+ void add_data(const byte[], u32bit);
+ void final_result(byte[]);
+ void hash(const byte[], u32bit);
+ u16bit S1, S2;
+ };
+
+}
+
+#endif