// SPDX-License-Identifier: BSD-3-Clause

// Copyright (c) Contributors to the OpenEXR Project.

#define COMPILING_IMF_IDMANIFEST_ATTRIBUTE

#include "ImfIDManifestAttribute.h"

#include <stdlib.h>

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER

#if defined(_MSC_VER)

// suppress warning about non-exported base classes

#    pragma warning(disable : 4251)

#    pragma warning(disable : 4275)

#endif

using namespace OPENEXR_IMF_INTERNAL_NAMESPACE;

template <>

IMF_EXPORT const char*

IDManifestAttribute::staticTypeName ()

{

    return "idmanifest";

}

template <>

IMF_EXPORT void

IDManifestAttribute::writeValueTo (

    OPENEXR_IMF_INTERNAL_NAMESPACE::OStream& os, int version) const

{

    uint64_t uncompressedDataSize = _value._uncompressedDataSize;

    Xdr::write<StreamIO> (os, uncompressedDataSize);

    const char* output = (const char*) _value._data;

    Xdr::write<StreamIO> (os, output, _value._compressedDataSize);

}

template <>

IMF_EXPORT void

IDManifestAttribute::readValueFrom (

    OPENEXR_IMF_INTERNAL_NAMESPACE::IStream& is, int size, int version)

{

    if (size < static_cast<int> (sizeof (uint64_t)))

    {

        throw IEX_NAMESPACE::InputExc (

            "Invalid size field reading idmanifest attribute");

    }

    _value._compressedDataSize = size - sizeof (uint64_t);

    if (_value._data)

    {

        // if attribute is reallocated , free up previous memory

        free (static_cast<void*> (_value._data));

        _value._data = nullptr;

    }

    uint64_t uncompressedDataSize;

    //

    // first eight bytes: data size once data is uncompressed

    //

    Xdr::read<StreamIO> (is, uncompressedDataSize);

    _value._uncompressedDataSize = uncompressedDataSize;

    //

    // allocate memory for compressed storage and read data

    //

    _value._data =

        static_cast<unsigned char*> (malloc (size - sizeof (uint64_t)));

    char* input = (char*) _value._data;

    Xdr::read<StreamIO> (is, input, _value._compressedDataSize);

}

template class IMF_EXPORT_TEMPLATE_INSTANCE

    TypedAttribute<OPENEXR_IMF_INTERNAL_NAMESPACE::CompressedIDManifest>;

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT