deserialize.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
 *                                                                           *
 * All rights reserved.                                                      *
 *                                                                           *
 * This program is free software; you can redistribute it and/or modify      *
 * it under the terms of the Mozilla Public License Version 2.0 as published *
 * by the Mozilla Foundation; either version 2 of the License, or            *
 * (at your option) any later version.                                       *
 *                                                                           *
 * This program is distributed in the hope that it will be useful,           *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_IO_SERIALIZATION_DESERIALIZE_H
#define VCL_IO_SERIALIZATION_DESERIALIZE_H
 
#include "endian.h"
 
#include <vclib/concepts/serialization.h>
#include <vclib/concepts/types.h>
 
#include <array>
#include <bit>
#include <istream>
#include <vector>
 
namespace vcl {
 
template<IsNotClass T>
void deserialize(std::istream& is, T& data, std::endian endian)
{
    is.read(reinterpret_cast<char*>(&data), sizeof(T));
    if (endian != std::endian::native) {
        data = detail::swapEndian(data);
    }
}
 
template<typename T>
void deserializeN(
    std::istream& is,
    T*            data,
    std::size_t   size,
    std::endian   endian = std::endian::little)
{
    for (std::size_t i = 0; i < size; ++i) {
        deserialize(is, data[i], endian);
    }
}
 
template<typename T, typename... Others>
void deserialize(std::istream& is, T& data, Others&... others)
{
    if constexpr (Serializable<T>) {
        data.deserialize(is);
    }
    else {
        deserialize(is, data, std::endian::little);
    }
    if constexpr (sizeof...(Others) > 0) {
        deserialize(is, others...);
    }
}
 
 
/*
 * std::array
 */
 
template<typename T, std::size_t N>
void deserialize(std::istream& is, std::array<T, N>& a)
{
    if constexpr (Serializable<T>) {
        for (T& v : a) {
            v.deserialize(is);
        }
    }
    else {
        for (T& e : a) {
            deserialize(is, e);
        }
    }
}
 
/*
 * std::string
 */
 
inline void deserialize(std::istream& is, std::string& s)
{
    std::size_t size;
    deserialize(is, size);
    s.resize(size);
    deserializeN(is, s.data(), size);
}
 
/*
 * std::vector
 */
 
template<typename T>
void deserialize(std::istream& is, std::vector<T>& v)
{
    std::size_t size;
    deserialize(is, size);
    v.resize(size);
    if constexpr (Serializable<T>) {
        for (T& e : v) {
            e.deserialize(is);
        }
    }
    else {
        for (T& e : v) {
            deserialize(is, e);
        }
    }
}
 
} // namespace vcl
 
#endif // VCL_IO_SERIALIZATION_DESERIALIZE_H