<commit_before>/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.

Licensed 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.
==============================================================================*/

#ifndef TENSORFLOW_CONTRIB_IGNITE_KERNELS_IGNITE_BYTE_SWAPPER_H_
#define TENSORFLOW_CONTRIB_IGNITE_KERNELS_IGNITE_BYTE_SWAPPER_H_

#include <stdint.h>

namespace tensorflow {

class ByteSwapper {
 public:
  ByteSwapper(bool big_endian) {
    int x = 1;
    bool is_little_endian = (*(char *)&x == 1);
    swap_ = big_endian == is_little_endian;
  }

  inline void SwapIfRequiredInt16(int16_t *x) const {
    if (swap_) {
      Swap16(x);
    }
  }

  inline void SwapIfRequiredUnsignedInt16(uint16_t *x) const {
    if (swap_) {
      Swap16(reinterpret_cast<int16_t *>(x));
    }
  }

  inline void SwapIfRequiredInt32(int32_t *x) const {
    if (swap_) {
      Swap32(x);
    }
  }
<commit_msg>Work out the endianness statically.<commit_after>/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.

Licensed 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.
==============================================================================*/

#ifndef TENSORFLOW_CONTRIB_IGNITE_KERNELS_IGNITE_BYTE_SWAPPER_H_
#define TENSORFLOW_CONTRIB_IGNITE_KERNELS_IGNITE_BYTE_SWAPPER_H_

#include <stdint.h>

namespace tensorflow {

constexpr bool kLittleEndian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__;

class ByteSwapper {
 public:
  ByteSwapper(bool big_endian) {
    swap_ = big_endian == kLittleEndian;
  }

  inline void SwapIfRequiredInt16(int16_t *x) const {
    if (swap_) {
      Swap16(x);
    }
  }

  inline void SwapIfRequiredUnsignedInt16(uint16_t *x) const {
    if (swap_) {
      Swap16(reinterpret_cast<int16_t *>(x));
    }
  }

  inline void SwapIfRequiredInt32(int32_t *x) const {
    if (swap_) {
      Swap32(x);
    }
  }

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