mfbt/EndianUtils.h
author Petru Lingurar <petru.lingurar@softvision.ro>
Fri, 21 Dec 2018 08:56:47 +0000
changeset 501492 65621d0fe1262af0643cec37c23b2d9ec42588ad
parent 487838 023e8e5e6fb2d72617bab83fb24c45e492f517f2
child 508163 6f3709b3878117466168c40affa7bca0b60cf75b
permissions -rw-r--r--
Bug 1513938 - Enforce a Bundle size limit and drop `privateSession` if exceeds it. r=JanH, a=jcristau The `privateSession` key would normally allow persisting the Private Browsing session across OOMs in Activity's Bundle. We need to do that to avoid storing private, sensible data on disk like we do with the normal browsing session. In some cases `privateSession` would contain a lot of data which, along with other possible concurrent transactions could overflow Binder's buffer which has a limited fixed size, currently 1Mb. To avoid this, we will drop `privateSession` from the Bundle if the resulting size is greater than a _speculative_ size of 300KBs which would mean that in the case of an OOM all Private Browsing state would be lost. Bug 1515592 is filed to investigate for a better solution. Differential Revision: https://phabricator.services.mozilla.com/D15067

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* Functions for reading and writing integers in various endiannesses. */

/*
 * The classes LittleEndian and BigEndian expose static methods for
 * reading and writing 16-, 32-, and 64-bit signed and unsigned integers
 * in their respective endianness.  The addresses read from or written
 * to may be misaligned (although misaligned accesses may incur
 * architecture-specific performance costs).  The naming scheme is:
 *
 * {Little,Big}Endian::{read,write}{Uint,Int}<bitsize>
 *
 * For instance, LittleEndian::readInt32 will read a 32-bit signed
 * integer from memory in little endian format.  Similarly,
 * BigEndian::writeUint16 will write a 16-bit unsigned integer to memory
 * in big-endian format.
 *
 * The class NativeEndian exposes methods for conversion of existing
 * data to and from the native endianness.  These methods are intended
 * for cases where data needs to be transferred, serialized, etc.
 * swap{To,From}{Little,Big}Endian byteswap a single value if necessary.
 * Bulk conversion functions are also provided which optimize the
 * no-conversion-needed case:
 *
 * - copyAndSwap{To,From}{Little,Big}Endian;
 * - swap{To,From}{Little,Big}EndianInPlace.
 *
 * The *From* variants are intended to be used for reading data and the
 * *To* variants for writing data.
 *
 * Methods on NativeEndian work with integer data of any type.
 * Floating-point data is not supported.
 *
 * For clarity in networking code, "Network" may be used as a synonym
 * for "Big" in any of the above methods or class names.
 *
 * As an example, reading a file format header whose fields are stored
 * in big-endian format might look like:
 *
 * class ExampleHeader
 * {
 * private:
 *   uint32_t mMagic;
 *   uint32_t mLength;
 *   uint32_t mTotalRecords;
 *   uint64_t mChecksum;
 *
 * public:
 *   ExampleHeader(const void* data)
 *   {
 *     const uint8_t* ptr = static_cast<const uint8_t*>(data);
 *     mMagic = BigEndian::readUint32(ptr); ptr += sizeof(uint32_t);
 *     mLength = BigEndian::readUint32(ptr); ptr += sizeof(uint32_t);
 *     mTotalRecords = BigEndian::readUint32(ptr); ptr += sizeof(uint32_t);
 *     mChecksum = BigEndian::readUint64(ptr);
 *   }
 *   ...
 * };
 */

#ifndef mozilla_EndianUtils_h
#define mozilla_EndianUtils_h

#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/Compiler.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/TypeTraits.h"

#include <stdint.h>
#include <string.h>

#if defined(_MSC_VER)
#  include <stdlib.h>
#  pragma intrinsic(_byteswap_ushort)
#  pragma intrinsic(_byteswap_ulong)
#  pragma intrinsic(_byteswap_uint64)
#endif

#if defined(_WIN64)
#  if defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)
#    define MOZ_LITTLE_ENDIAN 1
#  elif defined(_M_ARM64)
#    define MOZ_LITTLE_ENDIAN 1
#  else
#    error "CPU type is unknown"
#  endif
#elif defined(_WIN32)
#  if defined(_M_IX86)
#    define MOZ_LITTLE_ENDIAN 1
#  elif defined(_M_ARM)
#    define MOZ_LITTLE_ENDIAN 1
#  else
#    error "CPU type is unknown"
#  endif
#elif defined(__APPLE__) || defined(__powerpc__) || defined(__ppc__)
#  if __LITTLE_ENDIAN__
#    define MOZ_LITTLE_ENDIAN 1
#  elif __BIG_ENDIAN__
#    define MOZ_BIG_ENDIAN 1
#  endif
#elif defined(__GNUC__) && \
      defined(__BYTE_ORDER__) && \
      defined(__ORDER_LITTLE_ENDIAN__) && \
      defined(__ORDER_BIG_ENDIAN__)
   /*
    * Some versions of GCC provide architecture-independent macros for
    * this.  Yes, there are more than two values for __BYTE_ORDER__.
    */
#  if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#    define MOZ_LITTLE_ENDIAN 1
#  elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#    define MOZ_BIG_ENDIAN 1
#  else
#    error "Can't handle mixed-endian architectures"
#  endif
/*
 * We can't include useful headers like <endian.h> or <sys/isa_defs.h>
 * here because they're not present on all platforms.  Instead we have
 * this big conditional that ideally will catch all the interesting
 * cases.
 */
#elif defined(__sparc) || defined(__sparc__) || \
      defined(_POWER) || defined(__hppa) || \
      defined(_MIPSEB) || defined(__ARMEB__) || \
      defined(__s390__) || defined(__AARCH64EB__) || \
      (defined(__sh__) && defined(__LITTLE_ENDIAN__)) || \
      (defined(__ia64) && defined(__BIG_ENDIAN__))
#  define MOZ_BIG_ENDIAN 1
#elif defined(__i386) || defined(__i386__) || \
      defined(__x86_64) || defined(__x86_64__) || \
      defined(_MIPSEL) || defined(__ARMEL__) || \
      defined(__alpha__) || defined(__AARCH64EL__) || \
      (defined(__sh__) && defined(__BIG_ENDIAN__)) || \
      (defined(__ia64) && !defined(__BIG_ENDIAN__))
#  define MOZ_LITTLE_ENDIAN 1
#endif

#if MOZ_BIG_ENDIAN
#  define MOZ_LITTLE_ENDIAN 0
#elif MOZ_LITTLE_ENDIAN
#  define MOZ_BIG_ENDIAN 0
#else
#  error "Cannot determine endianness"
#endif

#if defined(__clang__)
#  if __has_builtin(__builtin_bswap16)
#    define MOZ_HAVE_BUILTIN_BYTESWAP16 __builtin_bswap16
#  endif
#elif defined(__GNUC__)
#  define MOZ_HAVE_BUILTIN_BYTESWAP16 __builtin_bswap16
#elif defined(_MSC_VER)
#  define MOZ_HAVE_BUILTIN_BYTESWAP16 _byteswap_ushort
#endif

namespace mozilla {

namespace detail {

/*
 * We need wrappers here because free functions with default template
 * arguments and/or partial specialization of function templates are not
 * supported by all the compilers we use.
 */
template<typename T, size_t Size = sizeof(T)>
struct Swapper;

template<typename T>
struct Swapper<T, 2>
{
  static T swap(T aValue)
  {
#if defined(MOZ_HAVE_BUILTIN_BYTESWAP16)
    return MOZ_HAVE_BUILTIN_BYTESWAP16(aValue);
#else
    return T(((aValue & 0x00ff) << 8) | ((aValue & 0xff00) >> 8));
#endif
  }
};

template<typename T>
struct Swapper<T, 4>
{
  static T swap(T aValue)
  {
#if defined(__clang__) || defined(__GNUC__)
    return T(__builtin_bswap32(aValue));
#elif defined(_MSC_VER)
    return T(_byteswap_ulong(aValue));
#else
    return T(((aValue & 0x000000ffU) << 24) |
             ((aValue & 0x0000ff00U) << 8) |
             ((aValue & 0x00ff0000U) >> 8) |
             ((aValue & 0xff000000U) >> 24));
#endif
  }
};

template<typename T>
struct Swapper<T, 8>
{
  static inline T swap(T aValue)
  {
#if defined(__clang__) || defined(__GNUC__)
    return T(__builtin_bswap64(aValue));
#elif defined(_MSC_VER)
    return T(_byteswap_uint64(aValue));
#else
    return T(((aValue & 0x00000000000000ffULL) << 56) |
             ((aValue & 0x000000000000ff00ULL) << 40) |
             ((aValue & 0x0000000000ff0000ULL) << 24) |
             ((aValue & 0x00000000ff000000ULL) << 8) |
             ((aValue & 0x000000ff00000000ULL) >> 8) |
             ((aValue & 0x0000ff0000000000ULL) >> 24) |
             ((aValue & 0x00ff000000000000ULL) >> 40) |
             ((aValue & 0xff00000000000000ULL) >> 56));
#endif
  }
};

enum Endianness { Little, Big };

#if MOZ_BIG_ENDIAN
#  define MOZ_NATIVE_ENDIANNESS detail::Big
#else
#  define MOZ_NATIVE_ENDIANNESS detail::Little
#endif

class EndianUtils
{
  /**
   * Assert that the memory regions [aDest, aDest+aCount) and
   * [aSrc, aSrc+aCount] do not overlap.  aCount is given in bytes.
   */
  static void assertNoOverlap(const void* aDest, const void* aSrc,
                              size_t aCount)
  {
    DebugOnly<const uint8_t*> byteDestPtr = static_cast<const uint8_t*>(aDest);
    DebugOnly<const uint8_t*> byteSrcPtr = static_cast<const uint8_t*>(aSrc);
    MOZ_ASSERT((byteDestPtr <= byteSrcPtr &&
                byteDestPtr + aCount <= byteSrcPtr) ||
               (byteSrcPtr <= byteDestPtr &&
                byteSrcPtr + aCount <= byteDestPtr));
  }

  template<typename T>
  static void assertAligned(T* aPtr)
  {
    MOZ_ASSERT((uintptr_t(aPtr) % sizeof(T)) == 0, "Unaligned pointer!");
  }

protected:
  /**
   * Return |aValue| converted from SourceEndian encoding to DestEndian
   * encoding.
   */
  template<Endianness SourceEndian, Endianness DestEndian, typename T>
  static inline T maybeSwap(T aValue)
  {
    if (SourceEndian == DestEndian) {
      return aValue;
    }
    return Swapper<T>::swap(aValue);
  }

  /**
   * Convert |aCount| elements at |aPtr| from SourceEndian encoding to
   * DestEndian encoding.
   */
  template<Endianness SourceEndian, Endianness DestEndian, typename T>
  static inline void maybeSwapInPlace(T* aPtr, size_t aCount)
  {
    assertAligned(aPtr);

    if (SourceEndian == DestEndian) {
      return;
    }
    for (size_t i = 0; i < aCount; i++) {
      aPtr[i] = Swapper<T>::swap(aPtr[i]);
    }
  }

  /**
   * Write |aCount| elements to the unaligned address |aDest| in DestEndian
   * format, using elements found at |aSrc| in SourceEndian format.
   */
  template<Endianness SourceEndian, Endianness DestEndian, typename T>
  static void copyAndSwapTo(void* aDest, const T* aSrc, size_t aCount)
  {
    assertNoOverlap(aDest, aSrc, aCount * sizeof(T));
    assertAligned(aSrc);

    if (SourceEndian == DestEndian) {
      memcpy(aDest, aSrc, aCount * sizeof(T));
      return;
    }

    uint8_t* byteDestPtr = static_cast<uint8_t*>(aDest);
    for (size_t i = 0; i < aCount; ++i) {
      union
      {
        T mVal;
        uint8_t mBuffer[sizeof(T)];
      } u;
      u.mVal = maybeSwap<SourceEndian, DestEndian>(aSrc[i]);
      memcpy(byteDestPtr, u.mBuffer, sizeof(T));
      byteDestPtr += sizeof(T);
    }
  }

  /**
   * Write |aCount| elements to |aDest| in DestEndian format, using elements
   * found at the unaligned address |aSrc| in SourceEndian format.
   */
  template<Endianness SourceEndian, Endianness DestEndian, typename T>
  static void copyAndSwapFrom(T* aDest, const void* aSrc, size_t aCount)
  {
    assertNoOverlap(aDest, aSrc, aCount * sizeof(T));
    assertAligned(aDest);

    if (SourceEndian == DestEndian) {
      memcpy(aDest, aSrc, aCount * sizeof(T));
      return;
    }

    const uint8_t* byteSrcPtr = static_cast<const uint8_t*>(aSrc);
    for (size_t i = 0; i < aCount; ++i) {
      union
      {
        T mVal;
        uint8_t mBuffer[sizeof(T)];
      } u;
      memcpy(u.mBuffer, byteSrcPtr, sizeof(T));
      aDest[i] = maybeSwap<SourceEndian, DestEndian>(u.mVal);
      byteSrcPtr += sizeof(T);
    }
  }
};

template<Endianness ThisEndian>
class Endian : private EndianUtils
{
protected:
  /** Read a uint16_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE uint16_t readUint16(const void* aPtr)
  {
    return read<uint16_t>(aPtr);
  }

  /** Read a uint32_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE uint32_t readUint32(const void* aPtr)
  {
    return read<uint32_t>(aPtr);
  }

  /** Read a uint64_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE uint64_t readUint64(const void* aPtr)
  {
    return read<uint64_t>(aPtr);
  }

  /** Read a uintptr_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE uintptr_t readUintptr(const void* aPtr)
  {
    return read<uintptr_t>(aPtr);
  }

  /** Read an int16_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE int16_t readInt16(const void* aPtr)
  {
    return read<int16_t>(aPtr);
  }

  /** Read an int32_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE int32_t readInt32(const void* aPtr)
  {
    return read<uint32_t>(aPtr);
  }

  /** Read an int64_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE int64_t readInt64(const void* aPtr)
  {
    return read<int64_t>(aPtr);
  }

  /** Read an intptr_t in ThisEndian endianness from |aPtr| and return it. */
  static MOZ_MUST_USE intptr_t readIntptr(const void* aPtr)
  {
    return read<intptr_t>(aPtr);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeUint16(void* aPtr, uint16_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeUint32(void* aPtr, uint32_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeUint64(void* aPtr, uint64_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeUintptr(void* aPtr, uintptr_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeInt16(void* aPtr, int16_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeInt32(void* aPtr, int32_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeInt64(void* aPtr, int64_t aValue)
  {
    write(aPtr, aValue);
  }

  /** Write |aValue| to |aPtr| using ThisEndian endianness. */
  static void writeIntptr(void* aPtr, intptr_t aValue)
  {
    write(aPtr, aValue);
  }

  /*
   * Converts a value of type T to little-endian format.
   *
   * This function is intended for cases where you have data in your
   * native-endian format and you need it to appear in little-endian
   * format for transmission.
   */
  template<typename T>
  MOZ_MUST_USE static T swapToLittleEndian(T aValue)
  {
    return maybeSwap<ThisEndian, Little>(aValue);
  }

  /*
   * Copies |aCount| values of type T starting at |aSrc| to |aDest|, converting
   * them to little-endian format if ThisEndian is Big.
   * As with memcpy, |aDest| and |aSrc| must not overlap.
   */
  template<typename T>
  static void copyAndSwapToLittleEndian(void* aDest, const T* aSrc,
                                        size_t aCount)
  {
    copyAndSwapTo<ThisEndian, Little>(aDest, aSrc, aCount);
  }

  /*
   * Likewise, but converts values in place.
   */
  template<typename T>
  static void swapToLittleEndianInPlace(T* aPtr, size_t aCount)
  {
    maybeSwapInPlace<ThisEndian, Little>(aPtr, aCount);
  }

  /*
   * Converts a value of type T to big-endian format.
   */
  template<typename T>
  MOZ_MUST_USE static T swapToBigEndian(T aValue)
  {
    return maybeSwap<ThisEndian, Big>(aValue);
  }

  /*
   * Copies |aCount| values of type T starting at |aSrc| to |aDest|, converting
   * them to big-endian format if ThisEndian is Little.
   * As with memcpy, |aDest| and |aSrc| must not overlap.
   */
  template<typename T>
  static void copyAndSwapToBigEndian(void* aDest, const T* aSrc,
                                     size_t aCount)
  {
    copyAndSwapTo<ThisEndian, Big>(aDest, aSrc, aCount);
  }

  /*
   * Likewise, but converts values in place.
   */
  template<typename T>
  static void swapToBigEndianInPlace(T* aPtr, size_t aCount)
  {
    maybeSwapInPlace<ThisEndian, Big>(aPtr, aCount);
  }

  /*
   * Synonyms for the big-endian functions, for better readability
   * in network code.
   */

  template<typename T>
  MOZ_MUST_USE static T swapToNetworkOrder(T aValue)
  {
    return swapToBigEndian(aValue);
  }

  template<typename T>
  static void
  copyAndSwapToNetworkOrder(void* aDest, const T* aSrc, size_t aCount)
  {
    copyAndSwapToBigEndian(aDest, aSrc, aCount);
  }

  template<typename T>
  static void
  swapToNetworkOrderInPlace(T* aPtr, size_t aCount)
  {
    swapToBigEndianInPlace(aPtr, aCount);
  }

  /*
   * Converts a value of type T from little-endian format.
   */
  template<typename T>
  MOZ_MUST_USE static T swapFromLittleEndian(T aValue)
  {
    return maybeSwap<Little, ThisEndian>(aValue);
  }

  /*
   * Copies |aCount| values of type T starting at |aSrc| to |aDest|, converting
   * them to little-endian format if ThisEndian is Big.
   * As with memcpy, |aDest| and |aSrc| must not overlap.
   */
  template<typename T>
  static void copyAndSwapFromLittleEndian(T* aDest, const void* aSrc,
                                          size_t aCount)
  {
    copyAndSwapFrom<Little, ThisEndian>(aDest, aSrc, aCount);
  }

  /*
   * Likewise, but converts values in place.
   */
  template<typename T>
  static void swapFromLittleEndianInPlace(T* aPtr, size_t aCount)
  {
    maybeSwapInPlace<Little, ThisEndian>(aPtr, aCount);
  }

  /*
   * Converts a value of type T from big-endian format.
   */
  template<typename T>
  MOZ_MUST_USE static T swapFromBigEndian(T aValue)
  {
    return maybeSwap<Big, ThisEndian>(aValue);
  }

  /*
   * Copies |aCount| values of type T starting at |aSrc| to |aDest|, converting
   * them to big-endian format if ThisEndian is Little.
   * As with memcpy, |aDest| and |aSrc| must not overlap.
   */
  template<typename T>
  static void copyAndSwapFromBigEndian(T* aDest, const void* aSrc,
                                       size_t aCount)
  {
    copyAndSwapFrom<Big, ThisEndian>(aDest, aSrc, aCount);
  }

  /*
   * Likewise, but converts values in place.
   */
  template<typename T>
  static void swapFromBigEndianInPlace(T* aPtr, size_t aCount)
  {
    maybeSwapInPlace<Big, ThisEndian>(aPtr, aCount);
  }

  /*
   * Synonyms for the big-endian functions, for better readability
   * in network code.
   */
  template<typename T>
  MOZ_MUST_USE static T swapFromNetworkOrder(T aValue)
  {
    return swapFromBigEndian(aValue);
  }

  template<typename T>
  static void copyAndSwapFromNetworkOrder(T* aDest, const void* aSrc,
                                          size_t aCount)
  {
    copyAndSwapFromBigEndian(aDest, aSrc, aCount);
  }

  template<typename T>
  static void swapFromNetworkOrderInPlace(T* aPtr, size_t aCount)
  {
    swapFromBigEndianInPlace(aPtr, aCount);
  }

private:
  /**
   * Read a value of type T, encoded in endianness ThisEndian from |aPtr|.
   * Return that value encoded in native endianness.
   */
  template<typename T>
  static T read(const void* aPtr)
  {
    union
    {
      T mVal;
      uint8_t mBuffer[sizeof(T)];
    } u;
    memcpy(u.mBuffer, aPtr, sizeof(T));
    return maybeSwap<ThisEndian, MOZ_NATIVE_ENDIANNESS>(u.mVal);
  }

  /**
   * Write a value of type T, in native endianness, to |aPtr|, in ThisEndian
   * endianness.
   */
  template<typename T>
  static void write(void* aPtr, T aValue)
  {
    T tmp = maybeSwap<MOZ_NATIVE_ENDIANNESS, ThisEndian>(aValue);
    memcpy(aPtr, &tmp, sizeof(T));
  }

  Endian() = delete;
  Endian(const Endian& aTther) = delete;
  void operator=(const Endian& aOther) = delete;
};

template<Endianness ThisEndian>
class EndianReadWrite : public Endian<ThisEndian>
{
private:
  typedef Endian<ThisEndian> super;

public:
  using super::readUint16;
  using super::readUint32;
  using super::readUint64;
  using super::readUintptr;
  using super::readInt16;
  using super::readInt32;
  using super::readInt64;
  using super::readIntptr;
  using super::writeUint16;
  using super::writeUint32;
  using super::writeUint64;
  using super::writeUintptr;
  using super::writeInt16;
  using super::writeInt32;
  using super::writeInt64;
  using super::writeIntptr;
};

} /* namespace detail */

class LittleEndian final : public detail::EndianReadWrite<detail::Little>
{};

class BigEndian final : public detail::EndianReadWrite<detail::Big>
{};

typedef BigEndian NetworkEndian;

class NativeEndian final : public detail::Endian<MOZ_NATIVE_ENDIANNESS>
{
private:
  typedef detail::Endian<MOZ_NATIVE_ENDIANNESS> super;

public:
  /*
   * These functions are intended for cases where you have data in your
   * native-endian format and you need the data to appear in the appropriate
   * endianness for transmission, serialization, etc.
   */
  using super::swapToLittleEndian;
  using super::copyAndSwapToLittleEndian;
  using super::swapToLittleEndianInPlace;
  using super::swapToBigEndian;
  using super::copyAndSwapToBigEndian;
  using super::swapToBigEndianInPlace;
  using super::swapToNetworkOrder;
  using super::copyAndSwapToNetworkOrder;
  using super::swapToNetworkOrderInPlace;

  /*
   * These functions are intended for cases where you have data in the
   * given endianness (e.g. reading from disk or a file-format) and you
   * need the data to appear in native-endian format for processing.
   */
  using super::swapFromLittleEndian;
  using super::copyAndSwapFromLittleEndian;
  using super::swapFromLittleEndianInPlace;
  using super::swapFromBigEndian;
  using super::copyAndSwapFromBigEndian;
  using super::swapFromBigEndianInPlace;
  using super::swapFromNetworkOrder;
  using super::copyAndSwapFromNetworkOrder;
  using super::swapFromNetworkOrderInPlace;
};

#undef MOZ_NATIVE_ENDIANNESS

} /* namespace mozilla */

#endif /* mozilla_EndianUtils_h */