/****************************************************************************
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** Copyright (C) 2018 The Qt Company Ltd.
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** This file is part of the QtBluetooth module of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** ensure the GNU Lesser General Public License version 3 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
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****************************************************************************/

#include "qbluetoothutils_winrt_p.h"
#include <QtBluetooth/private/qtbluetoothglobal_p.h>
#include <QtCore/private/qfunctions_winrt_p.h>

#include <robuffer.h>
#include <wrl.h>
#include <winrt/windows.foundation.metadata.h>
#include <windows.storage.streams.h>

using namespace Microsoft::WRL;
using namespace Microsoft::WRL::Wrappers;
using namespace winrt::Windows::Foundation::Metadata;
using namespace ABI::Windows::Storage::Streams;

QT_BEGIN_NAMESPACE

QByteArray byteArrayFromBuffer(const ComPtr<NativeBuffer> &buffer, bool isWCharString)
{
    if (!buffer) {
        qErrnoWarning("nullptr passed to byteArrayFromBuffer");
        return QByteArray();
    }
    ComPtr<Windows::Storage::Streams::IBufferByteAccess> byteAccess;
    HRESULT hr = buffer.As(&byteAccess);
    RETURN_IF_FAILED("Could not cast buffer", return QByteArray())
    char *data;
    hr = byteAccess->Buffer(reinterpret_cast<byte **>(&data));
    RETURN_IF_FAILED("Could not obtain buffer data", return QByteArray())
    UINT32 size;
    hr = buffer->get_Length(&size);
    RETURN_IF_FAILED("Could not obtain buffer size", return QByteArray())
    if (isWCharString) {
        QString valueString = QString::fromUtf16(reinterpret_cast<char16_t *>(data)).left(size / 2);
        return valueString.toUtf8();
    }
    return QByteArray(data, qint32(size));
}

QT_END_NAMESPACE
