Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 501 insertions, 0 deletions

diff --git a/mfbt/tests/TestEndian.cpp b/mfbt/tests/TestEndian.cpp
new file mode 100644
index 0000000000..7f275375f6
--- /dev/null
+++ b/mfbt/tests/TestEndian.cpp
@@ -0,0 +1,501 @@
+/* -*- 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/. */
+
+#include "mozilla/Assertions.h"
+#include "mozilla/EndianUtils.h"
+
+#include <stddef.h>
+
+using mozilla::BigEndian;
+using mozilla::LittleEndian;
+using mozilla::NativeEndian;
+
+template <typename T>
+void TestSingleSwap(T aValue, T aSwappedValue) {
+#if MOZ_LITTLE_ENDIAN()
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToBigEndian(aValue) == aSwappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromBigEndian(aValue) == aSwappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToNetworkOrder(aValue) == aSwappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromNetworkOrder(aValue) ==
+                     aSwappedValue);
+#else
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToLittleEndian(aValue) == aSwappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromLittleEndian(aValue) ==
+                     aSwappedValue);
+#endif
+}
+
+template <typename T>
+void TestSingleNoSwap(T aValue, T aUnswappedValue) {
+#if MOZ_LITTLE_ENDIAN()
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToLittleEndian(aValue) ==
+                     aUnswappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromLittleEndian(aValue) ==
+                     aUnswappedValue);
+#else
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToBigEndian(aValue) == aUnswappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromBigEndian(aValue) ==
+                     aUnswappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapToNetworkOrder(aValue) ==
+                     aUnswappedValue);
+  MOZ_RELEASE_ASSERT(NativeEndian::swapFromNetworkOrder(aValue) ==
+                     aUnswappedValue);
+#endif
+}
+
+// EndianUtils.h functions are declared as protected in a base class and
+// then re-exported as public in public derived classes.  The
+// standardese around explicit instantiation of templates is not clear
+// in such cases.  Provide these wrappers to make things more explicit.
+// For your own enlightenment, you may wish to peruse:
+// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56152 and subsequently
+// http://j.mp/XosS6S .
+#define WRAP_COPYTO(NAME)                               \
+  template <typename T>                                 \
+  void NAME(void* aDst, const T* aSrc, size_t aCount) { \
+    NativeEndian::NAME<T>(aDst, aSrc, aCount);          \
+  }
+
+WRAP_COPYTO(copyAndSwapToLittleEndian)
+WRAP_COPYTO(copyAndSwapToBigEndian)
+WRAP_COPYTO(copyAndSwapToNetworkOrder)
+
+#define WRAP_COPYFROM(NAME)                             \
+  template <typename T>                                 \
+  void NAME(T* aDst, const void* aSrc, size_t aCount) { \
+    NativeEndian::NAME<T>(aDst, aSrc, aCount);          \
+  }
+
+WRAP_COPYFROM(copyAndSwapFromLittleEndian)
+WRAP_COPYFROM(copyAndSwapFromBigEndian)
+WRAP_COPYFROM(copyAndSwapFromNetworkOrder)
+
+#define WRAP_IN_PLACE(NAME)            \
+  template <typename T>                \
+  void NAME(T* aP, size_t aCount) {    \
+    NativeEndian::NAME<T>(aP, aCount); \
+  }
+WRAP_IN_PLACE(swapToLittleEndianInPlace)
+WRAP_IN_PLACE(swapFromLittleEndianInPlace)
+WRAP_IN_PLACE(swapToBigEndianInPlace)
+WRAP_IN_PLACE(swapFromBigEndianInPlace)
+WRAP_IN_PLACE(swapToNetworkOrderInPlace)
+WRAP_IN_PLACE(swapFromNetworkOrderInPlace)
+
+enum SwapExpectation { Swap, NoSwap };
+
+template <typename T, size_t Count>
+void TestBulkSwapToSub(enum SwapExpectation aExpectSwap,
+                       const T (&aValues)[Count],
+                       void (*aSwapperFunc)(void*, const T*, size_t),
+                       T (*aReaderFunc)(const void*)) {
+  const size_t arraySize = 2 * Count;
+  const size_t bufferSize = arraySize * sizeof(T);
+  static uint8_t buffer[bufferSize];
+  const uint8_t fillValue = 0xa5;
+  static uint8_t checkBuffer[bufferSize];
+
+  MOZ_RELEASE_ASSERT(bufferSize > 2 * sizeof(T));
+
+  memset(checkBuffer, fillValue, bufferSize);
+
+  for (size_t startPosition = 0; startPosition < sizeof(T); ++startPosition) {
+    for (size_t nValues = 0; nValues < Count; ++nValues) {
+      memset(buffer, fillValue, bufferSize);
+      aSwapperFunc(buffer + startPosition, aValues, nValues);
+
+      MOZ_RELEASE_ASSERT(memcmp(buffer, checkBuffer, startPosition) == 0);
+      size_t valuesEndPosition = startPosition + sizeof(T) * nValues;
+      MOZ_RELEASE_ASSERT(memcmp(buffer + valuesEndPosition,
+                                checkBuffer + valuesEndPosition,
+                                bufferSize - valuesEndPosition) == 0);
+      if (aExpectSwap == NoSwap) {
+        MOZ_RELEASE_ASSERT(
+            memcmp(buffer + startPosition, aValues, nValues * sizeof(T)) == 0);
+      }
+      for (size_t i = 0; i < nValues; ++i) {
+        MOZ_RELEASE_ASSERT(
+            aReaderFunc(buffer + startPosition + sizeof(T) * i) == aValues[i]);
+      }
+    }
+  }
+}
+
+template <typename T, size_t Count>
+void TestBulkSwapFromSub(enum SwapExpectation aExpectSwap,
+                         const T (&aValues)[Count],
+                         void (*aSwapperFunc)(T*, const void*, size_t),
+                         T (*aReaderFunc)(const void*)) {
+  const size_t arraySize = 2 * Count;
+  const size_t bufferSize = arraySize * sizeof(T);
+  static T buffer[arraySize];
+  const uint8_t fillValue = 0xa5;
+  static T checkBuffer[arraySize];
+
+  memset(checkBuffer, fillValue, bufferSize);
+
+  for (size_t startPosition = 0; startPosition < Count; ++startPosition) {
+    for (size_t nValues = 0; nValues < (Count - startPosition); ++nValues) {
+      memset(buffer, fillValue, bufferSize);
+      aSwapperFunc(buffer + startPosition, aValues, nValues);
+
+      MOZ_RELEASE_ASSERT(
+          memcmp(buffer, checkBuffer, startPosition * sizeof(T)) == 0);
+      size_t valuesEndPosition = startPosition + nValues;
+      MOZ_RELEASE_ASSERT(
+          memcmp(buffer + valuesEndPosition, checkBuffer + valuesEndPosition,
+                 (arraySize - valuesEndPosition) * sizeof(T)) == 0);
+      if (aExpectSwap == NoSwap) {
+        MOZ_RELEASE_ASSERT(
+            memcmp(buffer + startPosition, aValues, nValues * sizeof(T)) == 0);
+      }
+      for (size_t i = 0; i < nValues; ++i) {
+        MOZ_RELEASE_ASSERT(aReaderFunc(buffer + startPosition + i) ==
+                           aValues[i]);
+      }
+    }
+  }
+}
+
+template <typename T, size_t Count>
+void TestBulkInPlaceSub(enum SwapExpectation aExpectSwap,
+                        const T (&aValues)[Count],
+                        void (*aSwapperFunc)(T*, size_t),
+                        T (*aReaderFunc)(const void*)) {
+  const size_t bufferCount = 4 * Count;
+  const size_t bufferSize = bufferCount * sizeof(T);
+  static T buffer[bufferCount];
+  const T fillValue = 0xa5;
+  static T checkBuffer[bufferCount];
+
+  MOZ_RELEASE_ASSERT(bufferSize > 2 * sizeof(T));
+
+  memset(checkBuffer, fillValue, bufferSize);
+
+  for (size_t startPosition = 0; startPosition < Count; ++startPosition) {
+    for (size_t nValues = 0; nValues < Count; ++nValues) {
+      memset(buffer, fillValue, bufferSize);
+      memcpy(buffer + startPosition, aValues, nValues * sizeof(T));
+      aSwapperFunc(buffer + startPosition, nValues);
+
+      MOZ_RELEASE_ASSERT(
+          memcmp(buffer, checkBuffer, startPosition * sizeof(T)) == 0);
+      size_t valuesEndPosition = startPosition + nValues;
+      MOZ_RELEASE_ASSERT(
+          memcmp(buffer + valuesEndPosition, checkBuffer + valuesEndPosition,
+                 bufferSize - valuesEndPosition * sizeof(T)) == 0);
+      if (aExpectSwap == NoSwap) {
+        MOZ_RELEASE_ASSERT(
+            memcmp(buffer + startPosition, aValues, nValues * sizeof(T)) == 0);
+      }
+      for (size_t i = 0; i < nValues; ++i) {
+        MOZ_RELEASE_ASSERT(aReaderFunc(buffer + startPosition + i) ==
+                           aValues[i]);
+      }
+    }
+  }
+}
+
+template <typename T>
+struct Reader {};
+
+#define SPECIALIZE_READER(TYPE, READ_FUNC)                                     \
+  template <>                                                                  \
+  struct Reader<TYPE> {                                                        \
+    static TYPE readLE(const void* aP) { return LittleEndian::READ_FUNC(aP); } \
+    static TYPE readBE(const void* aP) { return BigEndian::READ_FUNC(aP); }    \
+  };
+
+SPECIALIZE_READER(uint16_t, readUint16)
+SPECIALIZE_READER(uint32_t, readUint32)
+SPECIALIZE_READER(uint64_t, readUint64)
+SPECIALIZE_READER(int16_t, readInt16)
+SPECIALIZE_READER(int32_t, readInt32)
+SPECIALIZE_READER(int64_t, readInt64)
+
+template <typename T, size_t Count>
+void TestBulkSwap(const T (&aBytes)[Count]) {
+#if MOZ_LITTLE_ENDIAN()
+  TestBulkSwapToSub(Swap, aBytes, copyAndSwapToBigEndian<T>, Reader<T>::readBE);
+  TestBulkSwapFromSub(Swap, aBytes, copyAndSwapFromBigEndian<T>,
+                      Reader<T>::readBE);
+  TestBulkSwapToSub(Swap, aBytes, copyAndSwapToNetworkOrder<T>,
+                    Reader<T>::readBE);
+  TestBulkSwapFromSub(Swap, aBytes, copyAndSwapFromNetworkOrder<T>,
+                      Reader<T>::readBE);
+#else
+  TestBulkSwapToSub(Swap, aBytes, copyAndSwapToLittleEndian<T>,
+                    Reader<T>::readLE);
+  TestBulkSwapFromSub(Swap, aBytes, copyAndSwapFromLittleEndian<T>,
+                      Reader<T>::readLE);
+#endif
+}
+
+template <typename T, size_t Count>
+void TestBulkNoSwap(const T (&aBytes)[Count]) {
+#if MOZ_LITTLE_ENDIAN()
+  TestBulkSwapToSub(NoSwap, aBytes, copyAndSwapToLittleEndian<T>,
+                    Reader<T>::readLE);
+  TestBulkSwapFromSub(NoSwap, aBytes, copyAndSwapFromLittleEndian<T>,
+                      Reader<T>::readLE);
+#else
+  TestBulkSwapToSub(NoSwap, aBytes, copyAndSwapToBigEndian<T>,
+                    Reader<T>::readBE);
+  TestBulkSwapFromSub(NoSwap, aBytes, copyAndSwapFromBigEndian<T>,
+                      Reader<T>::readBE);
+  TestBulkSwapToSub(NoSwap, aBytes, copyAndSwapToNetworkOrder<T>,
+                    Reader<T>::readBE);
+  TestBulkSwapFromSub(NoSwap, aBytes, copyAndSwapFromNetworkOrder<T>,
+                      Reader<T>::readBE);
+#endif
+}
+
+template <typename T, size_t Count>
+void TestBulkInPlaceSwap(const T (&aBytes)[Count]) {
+#if MOZ_LITTLE_ENDIAN()
+  TestBulkInPlaceSub(Swap, aBytes, swapToBigEndianInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(Swap, aBytes, swapFromBigEndianInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(Swap, aBytes, swapToNetworkOrderInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(Swap, aBytes, swapFromNetworkOrderInPlace<T>,
+                     Reader<T>::readBE);
+#else
+  TestBulkInPlaceSub(Swap, aBytes, swapToLittleEndianInPlace<T>,
+                     Reader<T>::readLE);
+  TestBulkInPlaceSub(Swap, aBytes, swapFromLittleEndianInPlace<T>,
+                     Reader<T>::readLE);
+#endif
+}
+
+template <typename T, size_t Count>
+void TestBulkInPlaceNoSwap(const T (&aBytes)[Count]) {
+#if MOZ_LITTLE_ENDIAN()
+  TestBulkInPlaceSub(NoSwap, aBytes, swapToLittleEndianInPlace<T>,
+                     Reader<T>::readLE);
+  TestBulkInPlaceSub(NoSwap, aBytes, swapFromLittleEndianInPlace<T>,
+                     Reader<T>::readLE);
+#else
+  TestBulkInPlaceSub(NoSwap, aBytes, swapToBigEndianInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(NoSwap, aBytes, swapFromBigEndianInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(NoSwap, aBytes, swapToNetworkOrderInPlace<T>,
+                     Reader<T>::readBE);
+  TestBulkInPlaceSub(NoSwap, aBytes, swapFromNetworkOrderInPlace<T>,
+                     Reader<T>::readBE);
+#endif
+}
+
+int main() {
+  static const uint8_t unsigned_bytes[16] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
+                                             0x07, 0x08, 0x01, 0x02, 0x03, 0x04,
+                                             0x05, 0x06, 0x07, 0x08};
+  static const int8_t signed_bytes[16] = {
+      -0x0f, -0x0e, -0x0d, -0x0c, -0x0b, -0x0a, -0x09, -0x08,
+      -0x0f, -0x0e, -0x0d, -0x0c, -0x0b, -0x0a, -0x09, -0x08};
+  static const uint16_t uint16_values[8] = {0x0102, 0x0304, 0x0506, 0x0708,
+                                            0x0102, 0x0304, 0x0506, 0x0708};
+  static const int16_t int16_values[8] = {
+      int16_t(0xf1f2), int16_t(0xf3f4), int16_t(0xf5f6), int16_t(0xf7f8),
+      int16_t(0xf1f2), int16_t(0xf3f4), int16_t(0xf5f6), int16_t(0xf7f8)};
+  static const uint32_t uint32_values[4] = {0x01020304, 0x05060708, 0x01020304,
+                                            0x05060708};
+  static const int32_t int32_values[4] = {
+      int32_t(0xf1f2f3f4), int32_t(0xf5f6f7f8), int32_t(0xf1f2f3f4),
+      int32_t(0xf5f6f7f8)};
+  static const uint64_t uint64_values[2] = {0x0102030405060708,
+                                            0x0102030405060708};
+  static const int64_t int64_values[2] = {int64_t(0xf1f2f3f4f5f6f7f8),
+                                          int64_t(0xf1f2f3f4f5f6f7f8)};
+  uint8_t buffer[8];
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readUint16(&unsigned_bytes[0]) == 0x0201);
+  MOZ_RELEASE_ASSERT(BigEndian::readUint16(&unsigned_bytes[0]) == 0x0102);
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readUint32(&unsigned_bytes[0]) ==
+                     0x04030201U);
+  MOZ_RELEASE_ASSERT(BigEndian::readUint32(&unsigned_bytes[0]) == 0x01020304U);
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readUint64(&unsigned_bytes[0]) ==
+                     0x0807060504030201ULL);
+  MOZ_RELEASE_ASSERT(BigEndian::readUint64(&unsigned_bytes[0]) ==
+                     0x0102030405060708ULL);
+
+  if (sizeof(uintptr_t) == 8) {
+    // MSVC warning C4309 is "'static_cast': truncation of constant value" and
+    // will hit for the literal casts below in 32-bit builds -- in dead code,
+    // because only the other arm of this |if| runs.  Turn off the warning for
+    // these two uses in dead code.
+#ifdef _MSC_VER
+#  pragma warning(push)
+#  pragma warning(disable : 4309)
+#endif
+    MOZ_RELEASE_ASSERT(LittleEndian::readUintptr(&unsigned_bytes[0]) ==
+                       static_cast<uintptr_t>(0x0807060504030201ULL));
+    MOZ_RELEASE_ASSERT(BigEndian::readUintptr(&unsigned_bytes[0]) ==
+                       static_cast<uintptr_t>(0x0102030405060708ULL));
+#ifdef _MSC_VER
+#  pragma warning(pop)
+#endif
+  } else {
+    MOZ_RELEASE_ASSERT(LittleEndian::readUintptr(&unsigned_bytes[0]) ==
+                       0x04030201U);
+    MOZ_RELEASE_ASSERT(BigEndian::readUintptr(&unsigned_bytes[0]) ==
+                       0x01020304U);
+  }
+
+  LittleEndian::writeUint16(&buffer[0], 0x0201);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) ==
+                     0);
+  BigEndian::writeUint16(&buffer[0], 0x0102);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) ==
+                     0);
+
+  LittleEndian::writeUint32(&buffer[0], 0x04030201U);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) ==
+                     0);
+  BigEndian::writeUint32(&buffer[0], 0x01020304U);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) ==
+                     0);
+
+  LittleEndian::writeUint64(&buffer[0], 0x0807060504030201ULL);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_t)) ==
+                     0);
+  BigEndian::writeUint64(&buffer[0], 0x0102030405060708ULL);
+  MOZ_RELEASE_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_t)) ==
+                     0);
+
+  memset(&buffer[0], 0xff, sizeof(buffer));
+  LittleEndian::writeUintptr(&buffer[0], uintptr_t(0x0807060504030201ULL));
+  MOZ_RELEASE_ASSERT(
+      memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uintptr_t)) == 0);
+  if (sizeof(uintptr_t) == 4) {
+    MOZ_RELEASE_ASSERT(LittleEndian::readUint32(&buffer[4]) == 0xffffffffU);
+  }
+
+  memset(&buffer[0], 0xff, sizeof(buffer));
+  if (sizeof(uintptr_t) == 8) {
+    BigEndian::writeUintptr(&buffer[0], uintptr_t(0x0102030405060708ULL));
+  } else {
+    BigEndian::writeUintptr(&buffer[0], uintptr_t(0x01020304U));
+    MOZ_RELEASE_ASSERT(LittleEndian::readUint32(&buffer[4]) == 0xffffffffU);
+  }
+  MOZ_RELEASE_ASSERT(
+      memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uintptr_t)) == 0);
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readInt16(&signed_bytes[0]) ==
+                     int16_t(0xf2f1));
+  MOZ_RELEASE_ASSERT(BigEndian::readInt16(&signed_bytes[0]) == int16_t(0xf1f2));
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readInt32(&signed_bytes[0]) ==
+                     int32_t(0xf4f3f2f1));
+  MOZ_RELEASE_ASSERT(BigEndian::readInt32(&signed_bytes[0]) ==
+                     int32_t(0xf1f2f3f4));
+
+  MOZ_RELEASE_ASSERT(LittleEndian::readInt64(&signed_bytes[0]) ==
+                     int64_t(0xf8f7f6f5f4f3f2f1LL));
+  MOZ_RELEASE_ASSERT(BigEndian::readInt64(&signed_bytes[0]) ==
+                     int64_t(0xf1f2f3f4f5f6f7f8LL));
+
+  if (sizeof(uintptr_t) == 8) {
+    MOZ_RELEASE_ASSERT(LittleEndian::readIntptr(&signed_bytes[0]) ==
+                       intptr_t(0xf8f7f6f5f4f3f2f1LL));
+    MOZ_RELEASE_ASSERT(BigEndian::readIntptr(&signed_bytes[0]) ==
+                       intptr_t(0xf1f2f3f4f5f6f7f8LL));
+  } else {
+    MOZ_RELEASE_ASSERT(LittleEndian::readIntptr(&signed_bytes[0]) ==
+                       intptr_t(0xf4f3f2f1));
+    MOZ_RELEASE_ASSERT(BigEndian::readIntptr(&signed_bytes[0]) ==
+                       intptr_t(0xf1f2f3f4));
+  }
+
+  LittleEndian::writeInt16(&buffer[0], int16_t(0xf2f1));
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int16_t)) ==
+                     0);
+  BigEndian::writeInt16(&buffer[0], int16_t(0xf1f2));
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int16_t)) ==
+                     0);
+
+  LittleEndian::writeInt32(&buffer[0], 0xf4f3f2f1);
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int32_t)) ==
+                     0);
+  BigEndian::writeInt32(&buffer[0], 0xf1f2f3f4);
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int32_t)) ==
+                     0);
+
+  LittleEndian::writeInt64(&buffer[0], 0xf8f7f6f5f4f3f2f1LL);
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int64_t)) ==
+                     0);
+  BigEndian::writeInt64(&buffer[0], 0xf1f2f3f4f5f6f7f8LL);
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int64_t)) ==
+                     0);
+
+  memset(&buffer[0], 0xff, sizeof(buffer));
+  LittleEndian::writeIntptr(&buffer[0], intptr_t(0xf8f7f6f5f4f3f2f1LL));
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(intptr_t)) ==
+                     0);
+  if (sizeof(intptr_t) == 4) {
+    MOZ_RELEASE_ASSERT(LittleEndian::readUint32(&buffer[4]) == 0xffffffffU);
+  }
+
+  memset(&buffer[0], 0xff, sizeof(buffer));
+  if (sizeof(intptr_t) == 8) {
+    BigEndian::writeIntptr(&buffer[0], intptr_t(0xf1f2f3f4f5f6f7f8LL));
+  } else {
+    BigEndian::writeIntptr(&buffer[0], intptr_t(0xf1f2f3f4));
+    MOZ_RELEASE_ASSERT(LittleEndian::readUint32(&buffer[4]) == 0xffffffffU);
+  }
+  MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(intptr_t)) ==
+                     0);
+
+  TestSingleSwap(uint16_t(0xf2f1), uint16_t(0xf1f2));
+  TestSingleSwap(uint32_t(0xf4f3f2f1), uint32_t(0xf1f2f3f4));
+  TestSingleSwap(uint64_t(0xf8f7f6f5f4f3f2f1), uint64_t(0xf1f2f3f4f5f6f7f8));
+
+  TestSingleSwap(int16_t(0xf2f1), int16_t(0xf1f2));
+  TestSingleSwap(int32_t(0xf4f3f2f1), int32_t(0xf1f2f3f4));
+  TestSingleSwap(int64_t(0xf8f7f6f5f4f3f2f1), int64_t(0xf1f2f3f4f5f6f7f8));
+
+  TestSingleNoSwap(uint16_t(0xf2f1), uint16_t(0xf2f1));
+  TestSingleNoSwap(uint32_t(0xf4f3f2f1), uint32_t(0xf4f3f2f1));
+  TestSingleNoSwap(uint64_t(0xf8f7f6f5f4f3f2f1), uint64_t(0xf8f7f6f5f4f3f2f1));
+
+  TestSingleNoSwap(int16_t(0xf2f1), int16_t(0xf2f1));
+  TestSingleNoSwap(int32_t(0xf4f3f2f1), int32_t(0xf4f3f2f1));
+  TestSingleNoSwap(int64_t(0xf8f7f6f5f4f3f2f1), int64_t(0xf8f7f6f5f4f3f2f1));
+
+  TestBulkSwap(uint16_values);
+  TestBulkSwap(int16_values);
+  TestBulkSwap(uint32_values);
+  TestBulkSwap(int32_values);
+  TestBulkSwap(uint64_values);
+  TestBulkSwap(int64_values);
+
+  TestBulkNoSwap(uint16_values);
+  TestBulkNoSwap(int16_values);
+  TestBulkNoSwap(uint32_values);
+  TestBulkNoSwap(int32_values);
+  TestBulkNoSwap(uint64_values);
+  TestBulkNoSwap(int64_values);
+
+  TestBulkInPlaceSwap(uint16_values);
+  TestBulkInPlaceSwap(int16_values);
+  TestBulkInPlaceSwap(uint32_values);
+  TestBulkInPlaceSwap(int32_values);
+  TestBulkInPlaceSwap(uint64_values);
+  TestBulkInPlaceSwap(int64_values);
+
+  TestBulkInPlaceNoSwap(uint16_values);
+  TestBulkInPlaceNoSwap(int16_values);
+  TestBulkInPlaceNoSwap(uint32_values);
+  TestBulkInPlaceNoSwap(int32_values);
+  TestBulkInPlaceNoSwap(uint64_values);
+  TestBulkInPlaceNoSwap(int64_values);
+
+  return 0;
+}