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-rw-r--r--mfbt/tests/TestEndian.cpp472
1 files changed, 472 insertions, 0 deletions
diff --git a/mfbt/tests/TestEndian.cpp b/mfbt/tests/TestEndian.cpp
new file mode 100644
index 000000000..1fb8ac98f
--- /dev/null
+++ b/mfbt/tests/TestEndian.cpp
@@ -0,0 +1,472 @@
+/* -*- 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] = {
+ 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
+ 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8
+ };
+ 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] = {
+ 0x102, 0x304, 0x506, 0x708, 0x102, 0x304, 0x506, 0x708
+ };
+ 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] = {
+ 0x1020304, 0x5060708, 0x1020304, 0x5060708
+ };
+ 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] = {
+ 0x102030405060708, 0x102030405060708
+ };
+ 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]) == 0x201);
+ MOZ_RELEASE_ASSERT(BigEndian::readUint16(&unsigned_bytes[0]) == 0x102);
+
+ MOZ_RELEASE_ASSERT(
+ LittleEndian::readUint32(&unsigned_bytes[0]) == 0x4030201U);
+ MOZ_RELEASE_ASSERT(
+ BigEndian::readUint32(&unsigned_bytes[0]) == 0x1020304U);
+
+ MOZ_RELEASE_ASSERT(
+ LittleEndian::readUint64(&unsigned_bytes[0]) == 0x807060504030201ULL);
+ MOZ_RELEASE_ASSERT(
+ BigEndian::readUint64(&unsigned_bytes[0]) == 0x102030405060708ULL);
+
+ LittleEndian::writeUint16(&buffer[0], 0x201);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) == 0);
+ BigEndian::writeUint16(&buffer[0], 0x102);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) == 0);
+
+ LittleEndian::writeUint32(&buffer[0], 0x4030201U);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) == 0);
+ BigEndian::writeUint32(&buffer[0], 0x1020304U);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) == 0);
+
+ LittleEndian::writeUint64(&buffer[0], 0x807060504030201ULL);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_t)) == 0);
+ BigEndian::writeUint64(&buffer[0], 0x102030405060708ULL);
+ MOZ_RELEASE_ASSERT(
+ memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_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));
+
+ 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);
+
+ 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;
+}