/*
 * Copyright 2010, Ingo Weinhold, ingo_weinhold@gmx.de.
 * Distributed under the terms of the MIT License.
 */
#ifndef CHECK_SUM_H
#define CHECK_SUM_H


#include <string.h>

#include <SHA256.h>


struct CheckSum {
        const uint8* Data() const
        {
                return fData;
        }

        bool IsZero() const
        {
                for (size_t i = 0; i < sizeof(fData); i++) {
                        if (fData[i] != 0)
                                return false;
                }

                return true;
        }

        CheckSum& operator=(const CheckSum& other)
        {
                memcpy(fData, other.fData, sizeof(fData));
                return *this;
        }

        CheckSum& operator=(const void* buffer)
        {
                memcpy(fData, buffer, sizeof(fData));
                return *this;
        }

        bool operator==(const void* buffer) const
        {
                return memcmp(fData, buffer, sizeof(fData)) == 0;
        }

        bool operator!=(const void* buffer) const
        {
                return !(*this == buffer);
        }

private:
        uint8   fData[SHA_DIGEST_LENGTH];
};


#endif  // CHECK_SUM_H