include/pdb/utils/file.hpp


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// Copyright (c) 2017 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "PDB repository" project.
// For details, see https://github.com/egor-tensin/pdb-repo.
// Distributed under the MIT License.

#pragma once

#include <Windows.h>

#pragma warning(push, 0)
#include <boost/functional/hash.hpp>
#pragma warning(pop)

#include <cstddef>
#include <cstring>

#include <functional>
#include <string>

namespace pdb
{
    namespace file
    {
        std::size_t get_size(const std::string&);

        inline bool operator==(const FILE_ID_128& a, const FILE_ID_128& b)
        {
            return 0 == std::memcmp(a.Identifier, b.Identifier, sizeof(a.Identifier));
        }

        struct ID
        {
            const FILE_ID_INFO raw;

            bool operator==(const ID& other) const
            {
                return raw.VolumeSerialNumber == other.raw.VolumeSerialNumber
                    && raw.FileId == other.raw.FileId;
            }
        };

        ID query_id(const std::string&);
    }
}

namespace std
{
    template <>
    struct hash<pdb::file::ID>
    {
        std::size_t operator()(const pdb::file::ID& id) const
        {
            std::size_t seed = 0;
            boost::hash_combine(seed, id.raw.VolumeSerialNumber);
            boost::hash_combine(seed, id.raw.FileId.Identifier);
            return seed;
        }
    };
}