// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// distributed with this work for additional information

// regarding copyright ownership.  The ASF licenses this file

// to you under the Apache License, Version 2.0 (the

// "License"); you may not use this file except in compliance

// with the License.  You may obtain a copy of the License at

//

//   http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing,

// software distributed under the License is distributed on an

// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

// KIND, either express or implied.  See the License for the

// specific language governing permissions and limitations

// under the License.

#pragma once

#include "core/data_type/data_type.h"

namespace doris::simd {

#include "common/compile_check_begin.h"

// Copy src_len bytes from src_void to desc in reverse order.

// The first bytes of src_void will be copied to the last bytes of desc.

inline void reverse_copy_bytes(UInt8* __restrict desc, size_t desc_len, const void* src_void,

                               size_t src_len) {

    if (src_len == 0) {

        return;

    }

    const UInt8* __restrict src_ui8 = static_cast<const UInt8*>(src_void);

    for (int64_t i = desc_len - 1, j = 0; j < src_len; --i, ++j) {

        desc[i] = src_ui8[j];

    }

}

#include "common/compile_check_end.h"

} // namespace doris::simd