The Tor Browser: mfbt/tests/TestEndian.cpp@7e26c7da4463 (annotated)

mfbt/tests/TestEndian.cpp@7e26c7da4463 (annotated)

mfbt/tests/TestEndian.cpp

Wed, 31 Dec 2014 06:55:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:55:50 +0100
changeset 2: 7e26c7da4463
permissions: -rw-r--r--

Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2

 /* 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/Endian.h"
 #include <stddef.h>
 using mozilla::BigEndian;
 using mozilla::LittleEndian;
 using mozilla::NativeEndian;
 template<typename T>
 void
 TestSingleSwap(T value, T swappedValue)
 {
 #if MOZ_LITTLE_ENDIAN
   MOZ_RELEASE_ASSERT(NativeEndian::swapToBigEndian(value) == swappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromBigEndian(value) == swappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapToNetworkOrder(value) == swappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromNetworkOrder(value) == swappedValue);
 #else
   MOZ_RELEASE_ASSERT(NativeEndian::swapToLittleEndian(value) == swappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromLittleEndian(value) == swappedValue);
 #endif
 }
 template<typename T>
 void
 TestSingleNoSwap(T value, T notSwappedValue)
 {
 #if MOZ_LITTLE_ENDIAN
   MOZ_RELEASE_ASSERT(NativeEndian::swapToLittleEndian(value) == notSwappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromLittleEndian(value) == notSwappedValue);
 #else
   MOZ_RELEASE_ASSERT(NativeEndian::swapToBigEndian(value) == notSwappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromBigEndian(value) == notSwappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapToNetworkOrder(value) == notSwappedValue);
   MOZ_RELEASE_ASSERT(NativeEndian::swapFromNetworkOrder(value) == notSwappedValue);
 #endif
 }
 // Endian.h functions are declared as protected in an 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* dst, const T* src, size_t count)                   \
   {                                                             \
     NativeEndian::NAME<T>(dst, src, count);                     \
   }
 WRAP_COPYTO(copyAndSwapToLittleEndian)
 WRAP_COPYTO(copyAndSwapToBigEndian)
 WRAP_COPYTO(copyAndSwapToNetworkOrder)
 #define WRAP_COPYFROM(NAME)                                     \
   template<typename T>                                          \
   void                                                          \
   NAME(T* dst, const void* src, size_t count)                   \
   {                                                             \
     NativeEndian::NAME<T>(dst, src, count);                     \
   }
 WRAP_COPYFROM(copyAndSwapFromLittleEndian)
 WRAP_COPYFROM(copyAndSwapFromBigEndian)
 WRAP_COPYFROM(copyAndSwapFromNetworkOrder)
 #define WRAP_IN_PLACE(NAME)                                     \
   template<typename T>                                          \
   void                                                          \
   NAME(T* p, size_t count)                                      \
   {                                                             \
     NativeEndian::NAME<T>(p, count);                            \
   }
 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 expectSwap,
                   const T (&values)[Count],
                   void (*swapperFunc)(void*, const T*, size_t),
                   T (*readerFunc)(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);
       swapperFunc(buffer + startPosition, values, 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 (expectSwap == NoSwap) {
         MOZ_RELEASE_ASSERT(memcmp(buffer + startPosition, values,
                           nValues * sizeof(T)) == 0);
       }
       for (size_t i = 0; i < nValues; ++i) {
         MOZ_RELEASE_ASSERT(readerFunc(buffer + startPosition + sizeof(T) * i) ==
                    values[i]);
       }
     }
   }
 }
 template<typename T, size_t Count>
 void
 TestBulkSwapFromSub(enum SwapExpectation expectSwap,
                     const T (&values)[Count],
                     void (*swapperFunc)(T*, const void*, size_t),
                     T (*readerFunc)(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);
       swapperFunc(buffer + startPosition, values, 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 (expectSwap == NoSwap) {
         MOZ_RELEASE_ASSERT(memcmp(buffer + startPosition, values,
                           nValues * sizeof(T)) == 0);
       }
       for (size_t i = 0; i < nValues; ++i)
         MOZ_RELEASE_ASSERT(readerFunc(buffer + startPosition + i) == values[i]);
     }
   }
 }
 template<typename T, size_t Count>
 void
 TestBulkInPlaceSub(enum SwapExpectation expectSwap,
                    const T (&values)[Count],
                    void (*swapperFunc)(T* p, size_t),
                    T (*readerFunc)(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, values, nValues * sizeof(T));
       swapperFunc(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 (expectSwap == NoSwap) {
         MOZ_RELEASE_ASSERT(memcmp(buffer + startPosition, values,
                           nValues * sizeof(T)) == 0);
       }
       for (size_t i = 0; i < nValues; ++i)
         MOZ_RELEASE_ASSERT(readerFunc(buffer + startPosition + i) == values[i]);
     }
   }
 }
 template<typename T>
 struct Reader
 {
 };
 #define SPECIALIZE_READER(TYPE, READ_FUNC)                              \
   template<>                                                            \
   struct Reader<TYPE>                                                   \
   {                                                                     \
     static TYPE readLE(const void* p) { return LittleEndian::READ_FUNC(p); }    \
     static TYPE readBE(const void* p) { return BigEndian::READ_FUNC(p); } \
   };
 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 (&bytes)[Count])
 {
 #if MOZ_LITTLE_ENDIAN
   TestBulkSwapToSub(Swap, bytes, copyAndSwapToBigEndian<T>, Reader<T>::readBE);
   TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromBigEndian<T>, Reader<T>::readBE);
   TestBulkSwapToSub(Swap, bytes, copyAndSwapToNetworkOrder<T>, Reader<T>::readBE);
   TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromNetworkOrder<T>, Reader<T>::readBE);
 #else
   TestBulkSwapToSub(Swap, bytes, copyAndSwapToLittleEndian<T>, Reader<T>::readLE);
   TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromLittleEndian<T>, Reader<T>::readLE);
 #endif
 }
 template<typename T, size_t Count>
 void
 TestBulkNoSwap(const T (&bytes)[Count])
 {
 #if MOZ_LITTLE_ENDIAN
   TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToLittleEndian<T>, Reader<T>::readLE);
   TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromLittleEndian<T>, Reader<T>::readLE);
 #else
   TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToBigEndian<T>, Reader<T>::readBE);
   TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromBigEndian<T>, Reader<T>::readBE);
   TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToNetworkOrder<T>, Reader<T>::readBE);
   TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromNetworkOrder<T>, Reader<T>::readBE);
 #endif
 }
 template<typename T, size_t Count>
 void
 TestBulkInPlaceSwap(const T (&bytes)[Count])
 {
 #if MOZ_LITTLE_ENDIAN
   TestBulkInPlaceSub(Swap, bytes, swapToBigEndianInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(Swap, bytes, swapFromBigEndianInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(Swap, bytes, swapToNetworkOrderInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(Swap, bytes, swapFromNetworkOrderInPlace<T>, Reader<T>::readBE);
 #else
   TestBulkInPlaceSub(Swap, bytes, swapToLittleEndianInPlace<T>, Reader<T>::readLE);
   TestBulkInPlaceSub(Swap, bytes, swapFromLittleEndianInPlace<T>, Reader<T>::readLE);
 #endif
 }
 template<typename T, size_t Count>
 void
 TestBulkInPlaceNoSwap(const T (&bytes)[Count])
 {
 #if MOZ_LITTLE_ENDIAN
   TestBulkInPlaceSub(NoSwap, bytes, swapToLittleEndianInPlace<T>, Reader<T>::readLE);
   TestBulkInPlaceSub(NoSwap, bytes, swapFromLittleEndianInPlace<T>, Reader<T>::readLE);
 #else
   TestBulkInPlaceSub(NoSwap, bytes, swapToBigEndianInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(NoSwap, bytes, swapFromBigEndianInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(NoSwap, bytes, swapToNetworkOrderInPlace<T>, Reader<T>::readBE);
   TestBulkInPlaceSub(NoSwap, bytes, swapFromNetworkOrderInPlace<T>, Reader<T>::readBE);
 #endif
 }
 int
 main()
 {
   static const uint8_t unsigned_bytes[16] = { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
 x1, 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], 0xf2f1);
   MOZ_RELEASE_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int16_t)) == 0);
   BigEndian::writeInt16(&buffer[0], 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;
 }

The Tor Browser / annotate

mfbt/tests/TestEndian.cpp@7e26c7da4463 (annotated)

mfbt/tests/TestEndian.cpp