#ifndef _HASH_H_
#define _HASH_H_

#include <string>

namespace Multihash {
	namespace Hex {
		std::string hex(char* bin, int length);
		std::string hex(int bin);
	}
	
	class Hash {
		private:
			std::string digest_str;
			Hash* next;
		protected:
			virtual void hash_update(const char* data, int length);
			virtual std::string hash_digest();
		public:
			Hash(Hash* n = 0);
			void update(std::string data);
			void _update(const char* data, int length);
			std::string digest();
	};
	
	void _hash_file(int fileno, Hash* hash);
}

#endif // _HASH_H_