adress book added

AddressBook.h

@@ -0,0 +1,73 @@
+#ifndef ADDRESS_BOOK_H__
+#define ADDRESS_BOOK_H__
+
+#include <string.h>
+#include <string>
+#include <map>
+#include "base64.h"
+#include "util.h"
+#include "Identity.h"
+#include "Log.h"
+
+namespace i2p
+{
+namespace data
+{
+	class AddressBook
+	{
+		public:
+
+			AddressBook (): m_IsLoaded (false) {};
+	
+			const IdentHash * FindAddress (const std::string& address)
+			{
+				if (!m_IsLoaded)
+					LoadHosts ();
+				auto it = m_Addresses.find (address);
+				if (it != m_Addresses.end ())
+					return &it->second;
+				else
+					return nullptr;	
+			}
+		
+		private:
+	
+			void LoadHosts ()
+			{
+				m_IsLoaded = true;
+				std::ifstream f (i2p::util::filesystem::GetFullPath ("hosts.txt").c_str (), std::ofstream::in); // in text mode
+				if (!f.is_open ())	
+				{
+					LogPrint ("hosts.txt not found");
+					return;
+				}
+				int numAddresses = 0;
+				char str[1024];
+				while (!f.eof ())
+				{
+					f.getline (str, 1024);
+					char * key = strchr (str, '=');
+					if (key)
+					{
+						*key = 0;
+						key++;
+						Identity ident;
+						Base64ToByteStream (key, strlen(key), (uint8_t *)&ident, sizeof (ident));
+						m_Addresses[str] = CalculateIdentHash (ident);	
+						numAddresses++;
+					}		
+				}
+				LogPrint (numAddresses, " addresses loaded");
+			}
+
+		private:
+
+			std::map<std::string, IdentHash>  m_Addresses;
+			bool m_IsLoaded;
+	};
+}
+}
+
+#endif
+
+