/*
* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
* its licensors.
*
* For complete copyright and license terms please see the LICENSE at the root of this
* distribution (the "License"). All use of this software is governed by the License,
* or, if provided, by the license below or the license accompanying this file. Do not
* remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*
*/

#include <CryCommon/PakLoadDataUtils.h>

namespace PakLoadDataUtils
{
    bool LoadDataFromFile_Seek(size_t elems, AZ::IO::HandleType& fileHandle, int& nDataSize, [[maybe_unused]] EEndian eEndian)
    {
        GetISystem()->GetIPak()->FSeek(fileHandle, elems, SEEK_CUR);
        nDataSize -= elems;
        AZ_Assert(nDataSize >= 0, "nDataSize must be equal or greater than 0");
        return (nDataSize >= 0);
    }

    bool LoadDataFromFile_Seek(size_t elems, uint8*& f, int& nDataSize, [[maybe_unused]] EEndian eEndian)
    {
        nDataSize -= elems;
        f += elems;
        AZ_Assert(nDataSize >= 0, "nDataSize must be equal or greater than 0");
        return true;
    }

    void LoadDataFromFile_FixAlignment(AZ::IO::HandleType& fileHandle, int& nDataSize)
    {
        while (nDataSize & 3)
        {
            [[maybe_unused]] size_t nRes = GetISystem()->GetIPak()->FSeek(fileHandle, 1, SEEK_CUR);
            AZ_Assert(nRes == 0, "FSeek failed for 1 byte");
            AZ_Assert(nDataSize, "nDataSize reached zero" );
            nDataSize--;
        }
        AZ_Assert(nDataSize >= 0, "nDataSize must be equal or greater than 0");
    }

    void LoadDataFromFile_FixAlignment(uint8*& f, int& nDataSize)
    {
        while (nDataSize & 3)
        {
            AZ_Assert(*f == 222, "Found invalid data in buffer.");
            f++;
            AZ_Assert(nDataSize, "nDataSize reached zero");
            nDataSize--;
        }
        AZ_Assert(nDataSize >= 0, "nDataSize must be equal or greater than 0");
    }

} //namespace PakLoadDataUtils