/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#ifndef cmUuid_h
#define cmUuid_h

#include "cmConfigure.h"  // IWYU pragma: keep

#include <string>
#include <vector>

/** \class cmUuid
 * \brief Utility class to generate UUIDs as defined by RFC4122
 *
 */
class cmUuid
{
public:
    cmUuid();

    std::string FromMd5(std::vector<unsigned char> const& uuidNamespace,
                        std::string const&                name) const;

    std::string FromSha1(std::vector<unsigned char> const& uuidNamespace,
                         std::string const&                name) const;

    bool StringToBinary(std::string const&          input,
                        std::vector<unsigned char>& output) const;

private:
    std::string ByteToHex(unsigned char byte) const;

    void CreateHashInput(std::vector<unsigned char> const& uuidNamespace,
                         std::string const&                name,
                         std::vector<unsigned char>&       output) const;

    std::string FromDigest(const unsigned char* digest,
                           unsigned char        version) const;

    bool StringToBinaryImpl(std::string const&          input,
                            std::vector<unsigned char>& output) const;

    std::string BinaryToString(const unsigned char* input) const;

    bool IntFromHexDigit(char input, char& output) const;

    std::vector<int> Groups;
};

#endif
