//
// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) Contributors to the OpenEXR Project.
//

//-----------------------------------------------------------------------------
//
//	class OpaqueAttribute
//
//-----------------------------------------------------------------------------

#include "Iex.h"
#include "ImfNamespace.h"
#include <ImfOpaqueAttribute.h>
#include <string.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

OpaqueAttribute::OpaqueAttribute (const char typeName[])
    : _typeName (typeName), _dataSize (0)
{}

OpaqueAttribute::OpaqueAttribute (const OpaqueAttribute& other)
    : _typeName (other._typeName)
    , _dataSize (other._dataSize)
    , _data (other._dataSize)
{
    _data.resizeErase (other._dataSize);
    memcpy ((char*) _data, (const char*) other._data, other._dataSize);
}

OpaqueAttribute::~OpaqueAttribute ()
{
    // empty
}

const char*
OpaqueAttribute::typeName () const
{
    return _typeName.c_str ();
}

Attribute*
OpaqueAttribute::copy () const
{
    return new OpaqueAttribute (*this);
}

void
OpaqueAttribute::writeValueTo (
    OPENEXR_IMF_INTERNAL_NAMESPACE::OStream& os, int version) const
{
    Xdr::write<StreamIO> (os, _data, _dataSize);
}

void
OpaqueAttribute::readValueFrom (
    OPENEXR_IMF_INTERNAL_NAMESPACE::IStream& is, int size, int version)
{
    _data.resizeErase (size);
    _dataSize = size;
    Xdr::read<StreamIO> (is, _data, size);
}

void
OpaqueAttribute::copyValueFrom (const Attribute& other)
{
    const OpaqueAttribute* oa = dynamic_cast<const OpaqueAttribute*> (&other);

    if (oa == 0 || _typeName != oa->_typeName)
    {
        THROW (
            IEX_NAMESPACE::TypeExc,
            "Cannot copy the value of an "
            "image file attribute of type "
            "\"" << other.typeName ()
                 << "\" "
                    "to an attribute of type "
                    "\""
                 << _typeName << "\".");
    }

    _data.resizeErase (oa->_dataSize);
    _dataSize = oa->_dataSize;
    memcpy ((char*) _data, (const char*) oa->_data, oa->_dataSize);
}

OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
