FM / util

/usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/util/

/usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/util

Name	Size	Mode	Actions
algorithm.h	1229	0644	edit dl rm
aligned_storage.h	4302	0644	edit dl rm
align_util.h	2636	0644	edit dl rm
async_generator.h	64088	0644	edit dl rm
async_util.h	9633	0644	edit dl rm
atomic_shared_ptr.h	3640	0644	edit dl rm
base64.h	1098	0644	edit dl rm
basic_decimal.h	20334	0644	edit dl rm
benchmark_util.h	4584	0644	edit dl rm
bitmap.h	17463	0644	edit dl rm
bitmap_builders.h	1563	0644	edit dl rm
bitmap_generate.h	3563	0644	edit dl rm
bitmap_ops.h	9084	0644	edit dl rm
bitmap_reader.h	8347	0644	edit dl rm
bitmap_visit.h	3460	0644	edit dl rm
bitmap_writer.h	9360	0644	edit dl rm
bitset_stack.h	2789	0644	edit dl rm
bit_block_counter.h	19141	0644	edit dl rm
bit_run_reader.h	16599	0644	edit dl rm
bit_stream_utils.h	16986	0644	edit dl rm
bit_util.h	11568	0644	edit dl rm
bpacking.h	1175	0644	edit dl rm
bpacking64_default.h	195934	0644	edit dl rm
bpacking_avx2.h	1009	0644	edit dl rm
bpacking_avx512.h	1011	0644	edit dl rm
bpacking_default.h	103232	0644	edit dl rm
bpacking_neon.h	1009	0644	edit dl rm
bpacking_simd128_generated.h	98529	0644	edit dl rm
bpacking_simd256_generated.h	77475	0644	edit dl rm
bpacking_simd512_generated.h	67081	0644	edit dl rm
byte_stream_split.h	28784	0644	edit dl rm
cancel.h	2911	0644	edit dl rm
checked_cast.h	2076	0644	edit dl rm
compare.h	1981	0644	edit dl rm
compression.h	7367	0644	edit dl rm
concurrent_map.h	1775	0644	edit dl rm
config.h	1659	0644	edit dl rm
converter.h	14657	0644	edit dl rm
counting_semaphore.h	2251	0644	edit dl rm
cpu_info.h	4724	0644	edit dl rm
decimal.h	11687	0644	edit dl rm
delimiting.h	7335	0644	edit dl rm
dispatch.h	3235	0644	edit dl rm
double_conversion.h	1195	0644	edit dl rm
endian.h	8071	0644	edit dl rm
formatting.h	20612	0644	edit dl rm
functional.h	5612	0644	edit dl rm
future.h	36168	0644	edit dl rm
future_iterator.h	2517	0644	edit dl rm
hashing.h	30633	0644	edit dl rm
hash_util.h	1914	0644	edit dl rm
int_util.h	4284	0644	edit dl rm
io_util.h	10326	0644	edit dl rm
iterator.h	18123	0644	edit dl rm
key_value_metadata.h	3579	0644	edit dl rm
launder.h	1051	0644	edit dl rm
logging.h	9338	0644	edit dl rm
macros.h	7349	0644	edit dl rm
make_unique.h	1475	0644	edit dl rm
map.h	2476	0644	edit dl rm
math_constants.h	1106	0644	edit dl rm
memory.h	1566	0644	edit dl rm
mutex.h	1833	0644	edit dl rm
optional.h	1174	0644	edit dl rm
parallel.h	3616	0644	edit dl rm
pcg_random.h	1146	0644	edit dl rm
print.h	1725	0644	edit dl rm
queue.h	1017	0644	edit dl rm
range.h	4834	0644	edit dl rm
rle_encoding.h	31029	0644	edit dl rm
simd.h	1333	0644	edit dl rm
small_vector.h	14660	0644	edit dl rm
sort.h	2466	0644	edit dl rm
spaced.h	3567	0644	edit dl rm
stopwatch.h	1401	0644	edit dl rm
string.h	2570	0644	edit dl rm
string_builder.h	2446	0644	edit dl rm
string_view.h	1269	0644	edit dl rm
task_group.h	4362	0644	edit dl rm
tdigest.h	3052	0644	edit dl rm
test_common.h	2837	0644	edit dl rm
thread_pool.h	15338	0644	edit dl rm
time.h	2988	0644	edit dl rm
trie.h	7157	0644	edit dl rm
type_fwd.h	1409	0644	edit dl rm
type_traits.h	2894	0644	edit dl rm
ubsan.h	2777	0644	edit dl rm
unreachable.h	926	0644	edit dl rm
uri.h	3297	0644	edit dl rm
utf8.h	18780	0644	edit dl rm
value_parsing.h	27056	0644	edit dl rm
variant.h	13728	0644	edit dl rm
vector.h	5665	0644	edit dl rm
visibility.h	1463	0644	edit dl rm
windows_compatibility.h	1260	0644	edit dl rm
windows_fixup.h	1379	0644	edit dl rm

Edit: /usr/local/lib64/python3.6/site-packages/pyarrow/include/arrow/util/endian.h (8071B)

// 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

#ifdef _WIN32
#define ARROW_LITTLE_ENDIAN 1
#else
#if defined(__APPLE__) || defined(__FreeBSD__)
#include <machine/endian.h>  // IWYU pragma: keep
#elif defined(sun) || defined(__sun)
#include <sys/byteorder.h>  // IWYU pragma: keep
#else
#include <endian.h>  // IWYU pragma: keep
#endif
#
#ifndef __BYTE_ORDER__
#error "__BYTE_ORDER__ not defined"
#endif
#
#ifndef __ORDER_LITTLE_ENDIAN__
#error "__ORDER_LITTLE_ENDIAN__ not defined"
#endif
#
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define ARROW_LITTLE_ENDIAN 1
#else
#define ARROW_LITTLE_ENDIAN 0
#endif
#endif

#if defined(_MSC_VER)
#include <intrin.h>  // IWYU pragma: keep
#define ARROW_BYTE_SWAP64 _byteswap_uint64
#define ARROW_BYTE_SWAP32 _byteswap_ulong
#else
#define ARROW_BYTE_SWAP64 __builtin_bswap64
#define ARROW_BYTE_SWAP32 __builtin_bswap32
#endif

#include <algorithm>
#include <array>

#include "arrow/util/type_traits.h"
#include "arrow/util/ubsan.h"

namespace arrow {
namespace BitUtil {

//
// Byte-swap 16-bit, 32-bit and 64-bit values
//

// Swap the byte order (i.e. endianness)
static inline int64_t ByteSwap(int64_t value) { return ARROW_BYTE_SWAP64(value); }
static inline uint64_t ByteSwap(uint64_t value) {
  return static_cast<uint64_t>(ARROW_BYTE_SWAP64(value));
}
static inline int32_t ByteSwap(int32_t value) { return ARROW_BYTE_SWAP32(value); }
static inline uint32_t ByteSwap(uint32_t value) {
  return static_cast<uint32_t>(ARROW_BYTE_SWAP32(value));
}
static inline int16_t ByteSwap(int16_t value) {
  constexpr auto m = static_cast<int16_t>(0xff);
  return static_cast<int16_t>(((value >> 8) & m) | ((value & m) << 8));
}
static inline uint16_t ByteSwap(uint16_t value) {
  return static_cast<uint16_t>(ByteSwap(static_cast<int16_t>(value)));
}
static inline uint8_t ByteSwap(uint8_t value) { return value; }
static inline int8_t ByteSwap(int8_t value) { return value; }
static inline double ByteSwap(double value) {
  const uint64_t swapped = ARROW_BYTE_SWAP64(util::SafeCopy<uint64_t>(value));
  return util::SafeCopy<double>(swapped);
}
static inline float ByteSwap(float value) {
  const uint32_t swapped = ARROW_BYTE_SWAP32(util::SafeCopy<uint32_t>(value));
  return util::SafeCopy<float>(swapped);
}

// Write the swapped bytes into dst. Src and dst cannot overlap.
static inline void ByteSwap(void* dst, const void* src, int len) {
  switch (len) {
    case 1:
      *reinterpret_cast<int8_t*>(dst) = *reinterpret_cast<const int8_t*>(src);
      return;
    case 2:
      *reinterpret_cast<int16_t*>(dst) = ByteSwap(*reinterpret_cast<const int16_t*>(src));
      return;
    case 4:
      *reinterpret_cast<int32_t*>(dst) = ByteSwap(*reinterpret_cast<const int32_t*>(src));
      return;
    case 8:
      *reinterpret_cast<int64_t*>(dst) = ByteSwap(*reinterpret_cast<const int64_t*>(src));
      return;
    default:
      break;
  }

auto d = reinterpret_cast<uint8_t*>(dst);
  auto s = reinterpret_cast<const uint8_t*>(src);
  for (int i = 0; i < len; ++i) {
    d[i] = s[len - i - 1];
  }
}

// Convert to little/big endian format from the machine's native endian format.
#if ARROW_LITTLE_ENDIAN
template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T ToBigEndian(T value) {
  return ByteSwap(value);
}

template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T ToLittleEndian(T value) {
  return value;
}
#else
template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T ToBigEndian(T value) {
  return value;
}

// Convert from big/little endian format to the machine's native endian format.
#if ARROW_LITTLE_ENDIAN
template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T FromBigEndian(T value) {
  return ByteSwap(value);
}

template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T FromLittleEndian(T value) {
  return value;
}
#else
template <typename T, typename = internal::EnableIfIsOneOf<
                          T, int64_t, uint64_t, int32_t, uint32_t, int16_t, uint16_t,
                          uint8_t, int8_t, float, double>>
static inline T FromBigEndian(T value) {
  return value;
}

// Handle endianness in *word* granuality (keep individual array element untouched)
namespace LittleEndianArray {

namespace detail {

// Read a native endian array as little endian
template <typename T, size_t N>
struct Reader {
  const std::array<T, N>& native_array;

explicit Reader(const std::array<T, N>& native_array) : native_array(native_array) {}

const T& operator[](size_t i) const {
    return native_array[ARROW_LITTLE_ENDIAN ? i : N - 1 - i];
  }
};

// Read/write a native endian array as little endian
template <typename T, size_t N>
struct Writer {
  std::array<T, N>* native_array;

explicit Writer(std::array<T, N>* native_array) : native_array(native_array) {}

const T& operator[](size_t i) const {
    return (*native_array)[ARROW_LITTLE_ENDIAN ? i : N - 1 - i];
  }
  T& operator[](size_t i) { return (*native_array)[ARROW_LITTLE_ENDIAN ? i : N - 1 - i]; }
};

}  // namespace detail

// Construct array reader and try to deduce template augments
template <typename T, size_t N>
static inline detail::Reader<T, N> Make(const std::array<T, N>& native_array) {
  return detail::Reader<T, N>(native_array);
}

// Construct array writer and try to deduce template augments
template <typename T, size_t N>
static inline detail::Writer<T, N> Make(std::array<T, N>* native_array) {
  return detail::Writer<T, N>(native_array);
}

// Convert little endian array to native endian
template <typename T, size_t N>
static inline std::array<T, N> ToNative(std::array<T, N> array) {
  if (!ARROW_LITTLE_ENDIAN) {
    std::reverse(array.begin(), array.end());
  }
  return array;
}

// Convert native endian array to little endian
template <typename T, size_t N>
static inline std::array<T, N> FromNative(std::array<T, N> array) {
  return ToNative(array);
}

}  // namespace LittleEndianArray

}  // namespace BitUtil
}  // namespace arrow

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