hash.h

/*
   SPDX-FileCopyrightText: 2017 Volker Krause <vkrause@kde.org>
 
   SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#pragma once
 
#include "gravatar_private_export.h"
 
#include <cstdint>
#include <cstring>
 
class QByteArray;
class QString;
 
namespace Gravatar
{
template<int Size>
struct UnsignedInt {
    bool operator<(const UnsignedInt<Size> &other) const
    {
        return memcmp(data, other.data, Size) < 0;
    }
 
    bool operator==(const UnsignedInt<Size> &other) const
    {
        return memcmp(data, other.data, Size) == 0;
    }
 
    uint8_t data[Size];
};
struct Hash128 : public UnsignedInt<16> {
};
struct Hash256 : public UnsignedInt<32> {
};
 
class Hash;
size_t qHash(const Hash &h, size_t seed = 0) noexcept;
 
// exported for unit tests only
class GRAVATAR_TESTS_EXPORT Hash
{
public:
    enum Type {
        Invalid,
        Md5,
        Sha256
    };
    Hash();
    explicit Hash(const QByteArray &data, Type type);
 
    bool operator==(const Hash &other) const;
 
    bool isValid() const;
 
    Type type() const;
    Hash128 md5() const;
    Hash256 sha256() const;
 
    QString hexString() const;
 
private:
    friend size_t qHash(const Hash &h, size_t seed) noexcept;
    union {
        Hash128 md5;
        Hash256 sha256;
    } m_hash;
    Type m_type;
};
}