* Base.h : extract Tag template class to separate header

Tag.h

@@ -0,0 +1,82 @@
+#ifndef TAG_H__
+#define TAG_H__
+
+#include <string.h> /* memcpy */
+
+#include "Base.h"
+
+namespace i2p {
+namespace data {
+	template<int sz>
+	class Tag
+	{
+		public:
+
+			Tag (const uint8_t * buf) { memcpy (m_Buf, buf, sz); };
+			Tag (const Tag<sz>& ) = default;
+#ifndef _WIN32 // FIXME!!! msvs 2013 can't compile it
+			Tag (Tag<sz>&& ) = default;
+#endif
+			Tag () = default;
+
+			Tag<sz>& operator= (const Tag<sz>& ) = default;
+#ifndef _WIN32
+			Tag<sz>& operator= (Tag<sz>&& ) = default;
+#endif
+
+			uint8_t * operator()() { return m_Buf; };
+			const uint8_t * operator()() const { return m_Buf; };
+
+			operator uint8_t * () { return m_Buf; };
+			operator const uint8_t * () const { return m_Buf; };
+
+			const uint64_t * GetLL () const { return ll; };
+
+			bool operator== (const Tag<sz>& other) const { return !memcmp (m_Buf, other.m_Buf, sz); };
+			bool operator< (const Tag<sz>& other) const { return memcmp (m_Buf, other.m_Buf, sz) < 0; };
+
+			bool IsZero () const
+			{
+				for (int i = 0; i < sz/8; i++)
+					if (ll[i]) return false;
+				return true;
+			}
+
+			std::string ToBase64 () const
+			{
+				char str[sz*2];
+				int l = i2p::data::ByteStreamToBase64 (m_Buf, sz, str, sz*2);
+				str[l] = 0;
+				return std::string (str);
+			}
+
+			std::string ToBase32 () const
+			{
+				char str[sz*2];
+				int l = i2p::data::ByteStreamToBase32 (m_Buf, sz, str, sz*2);
+				str[l] = 0;
+				return std::string (str);
+			}
+
+			void FromBase32 (const std::string& s)
+			{
+				i2p::data::Base32ToByteStream (s.c_str (), s.length (), m_Buf, sz);
+			}
+
+			void FromBase64 (const std::string& s)
+			{
+				i2p::data::Base64ToByteStream (s.c_str (), s.length (), m_Buf, sz);
+			}
+
+		private:
+
+			union // 8 bytes alignment
+			{
+				uint8_t m_Buf[sz];
+				uint64_t ll[sz/8];
+			};
+	};
+} // data
+} // i2p
+
+#endif /* TAG_H__ */