mirror of
https://github.com/mozilla/gecko-dev.git
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401 lines
16 KiB
C++
401 lines
16 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Assertions.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/Endian.h"
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#include <stddef.h>
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using mozilla::BigEndian;
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using mozilla::DebugOnly;
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using mozilla::LittleEndian;
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using mozilla::NativeEndian;
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template<typename T>
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void
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TestSingleSwap(T value, T swappedValue)
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{
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#if MOZ_LITTLE_ENDIAN
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MOZ_ASSERT(NativeEndian::swapToBigEndian(value) == swappedValue);
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MOZ_ASSERT(NativeEndian::swapFromBigEndian(value) == swappedValue);
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MOZ_ASSERT(NativeEndian::swapToNetworkOrder(value) == swappedValue);
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MOZ_ASSERT(NativeEndian::swapFromNetworkOrder(value) == swappedValue);
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#else
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MOZ_ASSERT(NativeEndian::swapToLittleEndian(value) == swappedValue);
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MOZ_ASSERT(NativeEndian::swapFromLittleEndian(value) == swappedValue);
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#endif
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}
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template<typename T>
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void
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TestSingleNoSwap(T value, T notSwappedValue)
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{
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#if MOZ_LITTLE_ENDIAN
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MOZ_ASSERT(NativeEndian::swapToLittleEndian(value) == notSwappedValue);
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MOZ_ASSERT(NativeEndian::swapFromLittleEndian(value) == notSwappedValue);
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#else
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MOZ_ASSERT(NativeEndian::swapToBigEndian(value) == notSwappedValue);
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MOZ_ASSERT(NativeEndian::swapFromBigEndian(value) == notSwappedValue);
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MOZ_ASSERT(NativeEndian::swapToNetworkOrder(value) == notSwappedValue);
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MOZ_ASSERT(NativeEndian::swapFromNetworkOrder(value) == notSwappedValue);
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#endif
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}
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// Endian.h functions are declared as protected in an base class and
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// then re-exported as public in public derived classes. The
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// standardese around explicit instantiation of templates is not clear
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// in such cases. Provide these wrappers to make things more explicit.
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// For your own enlightenment, you may wish to peruse:
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// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56152 and subsequently
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// http://j.mp/XosS6S .
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#define WRAP_COPYTO(NAME) \
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template<typename T> \
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void \
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NAME(void* dst, const T* src, size_t count) \
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{ \
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NativeEndian::NAME<T>(dst, src, count); \
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}
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WRAP_COPYTO(copyAndSwapToLittleEndian)
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WRAP_COPYTO(copyAndSwapToBigEndian)
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WRAP_COPYTO(copyAndSwapToNetworkOrder)
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#define WRAP_COPYFROM(NAME) \
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template<typename T> \
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void \
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NAME(T* dst, const void* src, size_t count) \
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{ \
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NativeEndian::NAME<T>(dst, src, count); \
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}
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WRAP_COPYFROM(copyAndSwapFromLittleEndian)
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WRAP_COPYFROM(copyAndSwapFromBigEndian)
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WRAP_COPYFROM(copyAndSwapFromNetworkOrder)
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#define WRAP_IN_PLACE(NAME) \
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template<typename T> \
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void \
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NAME(T* p, size_t count) \
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{ \
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NativeEndian::NAME<T>(p, count); \
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}
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WRAP_IN_PLACE(swapToLittleEndianInPlace)
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WRAP_IN_PLACE(swapFromLittleEndianInPlace)
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WRAP_IN_PLACE(swapToBigEndianInPlace)
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WRAP_IN_PLACE(swapFromBigEndianInPlace)
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WRAP_IN_PLACE(swapToNetworkOrderInPlace)
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WRAP_IN_PLACE(swapFromNetworkOrderInPlace)
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enum SwapExpectation {
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Swap,
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NoSwap
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};
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template<typename T, size_t Count>
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void
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TestBulkSwapToSub(enum SwapExpectation expectSwap,
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const T (&values)[Count],
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void (*swapperFunc)(void*, const T*, size_t),
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T (*readerFunc)(const void*))
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{
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const size_t arraySize = 2 * Count;
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const size_t bufferSize = arraySize * sizeof(T);
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static uint8_t buffer[bufferSize];
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const uint8_t fillValue = 0xa5;
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static uint8_t checkBuffer[bufferSize];
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MOZ_ASSERT(bufferSize > 2 * sizeof(T));
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memset(checkBuffer, fillValue, bufferSize);
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for (size_t startPosition = 0; startPosition < sizeof(T); ++startPosition) {
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for (size_t nValues = 0; nValues < Count; ++nValues) {
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memset(buffer, fillValue, bufferSize);
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swapperFunc(buffer + startPosition, values, nValues);
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MOZ_ASSERT(memcmp(buffer, checkBuffer, startPosition) == 0);
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DebugOnly<size_t> valuesEndPosition = startPosition + sizeof(T) * nValues;
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MOZ_ASSERT(memcmp(buffer + valuesEndPosition,
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checkBuffer + valuesEndPosition,
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bufferSize - valuesEndPosition) == 0);
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if (expectSwap == NoSwap) {
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MOZ_ASSERT(memcmp(buffer + startPosition, values,
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nValues * sizeof(T)) == 0);
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}
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for (size_t i = 0; i < nValues; ++i) {
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MOZ_ASSERT(readerFunc(buffer + startPosition + sizeof(T) * i) ==
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values[i]);
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}
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}
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}
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}
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template<typename T, size_t Count>
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void
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TestBulkSwapFromSub(enum SwapExpectation expectSwap,
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const T (&values)[Count],
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void (*swapperFunc)(T*, const void*, size_t),
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T (*readerFunc)(const void*))
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{
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const size_t arraySize = 2 * Count;
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const size_t bufferSize = arraySize * sizeof(T);
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static T buffer[arraySize];
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const uint8_t fillValue = 0xa5;
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static T checkBuffer[arraySize];
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memset(checkBuffer, fillValue, bufferSize);
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for (size_t startPosition = 0; startPosition < Count; ++startPosition) {
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for (size_t nValues = 0; nValues < (Count - startPosition); ++nValues) {
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memset(buffer, fillValue, bufferSize);
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swapperFunc(buffer + startPosition, values, nValues);
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MOZ_ASSERT(memcmp(buffer, checkBuffer, startPosition * sizeof(T)) == 0);
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DebugOnly<size_t> valuesEndPosition = startPosition + nValues;
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MOZ_ASSERT(memcmp(buffer + valuesEndPosition,
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checkBuffer + valuesEndPosition,
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(arraySize - valuesEndPosition) * sizeof(T)) == 0);
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if (expectSwap == NoSwap) {
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MOZ_ASSERT(memcmp(buffer + startPosition, values,
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nValues * sizeof(T)) == 0);
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}
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for (size_t i = 0; i < nValues; ++i)
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MOZ_ASSERT(readerFunc(buffer + startPosition + i) == values[i]);
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}
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}
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}
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template<typename T, size_t Count>
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void
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TestBulkInPlaceSub(enum SwapExpectation expectSwap,
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const T (&values)[Count],
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void (*swapperFunc)(T* p, size_t),
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T (*readerFunc)(const void*))
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{
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const size_t bufferCount = 4 * Count;
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const size_t bufferSize = bufferCount * sizeof(T);
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static T buffer[bufferCount];
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const T fillValue = 0xa5;
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static T checkBuffer[bufferCount];
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MOZ_ASSERT(bufferSize > 2 * sizeof(T));
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memset(checkBuffer, fillValue, bufferSize);
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for (size_t startPosition = 0; startPosition < Count; ++startPosition) {
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for (size_t nValues = 0; nValues < Count; ++nValues) {
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memset(buffer, fillValue, bufferSize);
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memcpy(buffer + startPosition, values, nValues * sizeof(T));
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swapperFunc(buffer + startPosition, nValues);
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MOZ_ASSERT(memcmp(buffer, checkBuffer, startPosition * sizeof(T)) == 0);
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DebugOnly<size_t> valuesEndPosition = startPosition + nValues;
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MOZ_ASSERT(memcmp(buffer + valuesEndPosition,
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checkBuffer + valuesEndPosition,
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bufferSize - valuesEndPosition * sizeof(T)) == 0);
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if (expectSwap == NoSwap) {
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MOZ_ASSERT(memcmp(buffer + startPosition, values,
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nValues * sizeof(T)) == 0);
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}
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for (size_t i = 0; i < nValues; ++i)
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MOZ_ASSERT(readerFunc(buffer + startPosition + i) == values[i]);
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}
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}
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}
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template<typename T>
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struct Reader
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{
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};
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#define SPECIALIZE_READER(TYPE, READ_FUNC) \
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template<> \
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struct Reader<TYPE> \
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{ \
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static TYPE readLE(const void* p) { return LittleEndian::READ_FUNC(p); } \
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static TYPE readBE(const void* p) { return BigEndian::READ_FUNC(p); } \
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};
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SPECIALIZE_READER(uint16_t, readUint16)
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SPECIALIZE_READER(uint32_t, readUint32)
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SPECIALIZE_READER(uint64_t, readUint64)
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SPECIALIZE_READER(int16_t, readInt16)
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SPECIALIZE_READER(int32_t, readInt32)
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SPECIALIZE_READER(int64_t, readInt64)
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template<typename T, size_t Count>
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void
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TestBulkSwap(const T (&bytes)[Count])
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{
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#if MOZ_LITTLE_ENDIAN
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TestBulkSwapToSub(Swap, bytes, copyAndSwapToBigEndian<T>, Reader<T>::readBE);
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TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromBigEndian<T>, Reader<T>::readBE);
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TestBulkSwapToSub(Swap, bytes, copyAndSwapToNetworkOrder<T>, Reader<T>::readBE);
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TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromNetworkOrder<T>, Reader<T>::readBE);
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#else
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TestBulkSwapToSub(Swap, bytes, copyAndSwapToLittleEndian<T>, Reader<T>::readLE);
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TestBulkSwapFromSub(Swap, bytes, copyAndSwapFromLittleEndian<T>, Reader<T>::readLE);
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#endif
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}
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template<typename T, size_t Count>
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void
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TestBulkNoSwap(const T (&bytes)[Count])
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{
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#if MOZ_LITTLE_ENDIAN
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TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToLittleEndian<T>, Reader<T>::readLE);
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TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromLittleEndian<T>, Reader<T>::readLE);
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#else
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TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToBigEndian<T>, Reader<T>::readBE);
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TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromBigEndian<T>, Reader<T>::readBE);
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TestBulkSwapToSub(NoSwap, bytes, copyAndSwapToNetworkOrder<T>, Reader<T>::readBE);
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TestBulkSwapFromSub(NoSwap, bytes, copyAndSwapFromNetworkOrder<T>, Reader<T>::readBE);
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#endif
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}
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template<typename T, size_t Count>
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void
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TestBulkInPlaceSwap(const T (&bytes)[Count])
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{
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#if MOZ_LITTLE_ENDIAN
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TestBulkInPlaceSub(Swap, bytes, swapToBigEndianInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(Swap, bytes, swapFromBigEndianInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(Swap, bytes, swapToNetworkOrderInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(Swap, bytes, swapFromNetworkOrderInPlace<T>, Reader<T>::readBE);
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#else
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TestBulkInPlaceSub(Swap, bytes, swapToLittleEndianInPlace<T>, Reader<T>::readLE);
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TestBulkInPlaceSub(Swap, bytes, swapFromLittleEndianInPlace<T>, Reader<T>::readLE);
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#endif
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}
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template<typename T, size_t Count>
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void
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TestBulkInPlaceNoSwap(const T (&bytes)[Count])
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{
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#if MOZ_LITTLE_ENDIAN
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TestBulkInPlaceSub(NoSwap, bytes, swapToLittleEndianInPlace<T>, Reader<T>::readLE);
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TestBulkInPlaceSub(NoSwap, bytes, swapFromLittleEndianInPlace<T>, Reader<T>::readLE);
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#else
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TestBulkInPlaceSub(NoSwap, bytes, swapToBigEndianInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(NoSwap, bytes, swapFromBigEndianInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(NoSwap, bytes, swapToNetworkOrderInPlace<T>, Reader<T>::readBE);
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TestBulkInPlaceSub(NoSwap, bytes, swapFromNetworkOrderInPlace<T>, Reader<T>::readBE);
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#endif
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}
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int
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main()
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{
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static const uint8_t unsigned_bytes[16] = { 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8,
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0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8 };
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static const int8_t signed_bytes[16] = { -0x0f, -0x0e, -0x0d, -0x0c, -0x0b, -0x0a, -0x09, -0x08,
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-0x0f, -0x0e, -0x0d, -0x0c, -0x0b, -0x0a, -0x09, -0x08 };
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static const uint16_t uint16_values[8] = { 0x102, 0x304, 0x506, 0x708, 0x102, 0x304, 0x506, 0x708 };
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static const int16_t int16_values[8] = { int16_t(0xf1f2), int16_t(0xf3f4), int16_t(0xf5f6), int16_t(0xf7f8),
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int16_t(0xf1f2), int16_t(0xf3f4), int16_t(0xf5f6), int16_t(0xf7f8) };
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static const uint32_t uint32_values[4] = { 0x1020304, 0x5060708, 0x1020304, 0x5060708 };
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static const int32_t int32_values[4] = { int32_t(0xf1f2f3f4), int32_t(0xf5f6f7f8),
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int32_t(0xf1f2f3f4), int32_t(0xf5f6f7f8) };
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static const uint64_t uint64_values[2] = { 0x102030405060708, 0x102030405060708 };
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static const int64_t int64_values[2] = { int64_t(0xf1f2f3f4f5f6f7f8),
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int64_t(0xf1f2f3f4f5f6f7f8) };
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uint8_t buffer[8];
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MOZ_ASSERT(LittleEndian::readUint16(&unsigned_bytes[0]) == 0x201);
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MOZ_ASSERT(BigEndian::readUint16(&unsigned_bytes[0]) == 0x102);
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MOZ_ASSERT(LittleEndian::readUint32(&unsigned_bytes[0]) == 0x4030201U);
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MOZ_ASSERT(BigEndian::readUint32(&unsigned_bytes[0]) == 0x1020304U);
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MOZ_ASSERT(LittleEndian::readUint64(&unsigned_bytes[0]) == 0x807060504030201ULL);
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MOZ_ASSERT(BigEndian::readUint64(&unsigned_bytes[0]) == 0x102030405060708ULL);
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LittleEndian::writeUint16(&buffer[0], 0x201);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) == 0);
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BigEndian::writeUint16(&buffer[0], 0x102);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint16_t)) == 0);
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LittleEndian::writeUint32(&buffer[0], 0x4030201U);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) == 0);
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BigEndian::writeUint32(&buffer[0], 0x1020304U);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint32_t)) == 0);
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LittleEndian::writeUint64(&buffer[0], 0x807060504030201ULL);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_t)) == 0);
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BigEndian::writeUint64(&buffer[0], 0x102030405060708ULL);
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MOZ_ASSERT(memcmp(&unsigned_bytes[0], &buffer[0], sizeof(uint64_t)) == 0);
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MOZ_ASSERT(LittleEndian::readInt16(&signed_bytes[0]) == int16_t(0xf2f1));
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MOZ_ASSERT(BigEndian::readInt16(&signed_bytes[0]) == int16_t(0xf1f2));
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MOZ_ASSERT(LittleEndian::readInt32(&signed_bytes[0]) == int32_t(0xf4f3f2f1));
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MOZ_ASSERT(BigEndian::readInt32(&signed_bytes[0]) == int32_t(0xf1f2f3f4));
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MOZ_ASSERT(LittleEndian::readInt64(&signed_bytes[0]) == int64_t(0xf8f7f6f5f4f3f2f1LL));
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MOZ_ASSERT(BigEndian::readInt64(&signed_bytes[0]) == int64_t(0xf1f2f3f4f5f6f7f8LL));
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LittleEndian::writeInt16(&buffer[0], 0xf2f1);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int16_t)) == 0);
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BigEndian::writeInt16(&buffer[0], 0xf1f2);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int16_t)) == 0);
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LittleEndian::writeInt32(&buffer[0], 0xf4f3f2f1);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int32_t)) == 0);
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BigEndian::writeInt32(&buffer[0], 0xf1f2f3f4);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int32_t)) == 0);
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LittleEndian::writeInt64(&buffer[0], 0xf8f7f6f5f4f3f2f1LL);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int64_t)) == 0);
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BigEndian::writeInt64(&buffer[0], 0xf1f2f3f4f5f6f7f8LL);
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MOZ_ASSERT(memcmp(&signed_bytes[0], &buffer[0], sizeof(int64_t)) == 0);
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TestSingleSwap(uint16_t(0xf2f1), uint16_t(0xf1f2));
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TestSingleSwap(uint32_t(0xf4f3f2f1), uint32_t(0xf1f2f3f4));
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TestSingleSwap(uint64_t(0xf8f7f6f5f4f3f2f1), uint64_t(0xf1f2f3f4f5f6f7f8));
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TestSingleSwap(int16_t(0xf2f1), int16_t(0xf1f2));
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TestSingleSwap(int32_t(0xf4f3f2f1), int32_t(0xf1f2f3f4));
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TestSingleSwap(int64_t(0xf8f7f6f5f4f3f2f1), int64_t(0xf1f2f3f4f5f6f7f8));
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TestSingleNoSwap(uint16_t(0xf2f1), uint16_t(0xf2f1));
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TestSingleNoSwap(uint32_t(0xf4f3f2f1), uint32_t(0xf4f3f2f1));
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TestSingleNoSwap(uint64_t(0xf8f7f6f5f4f3f2f1), uint64_t(0xf8f7f6f5f4f3f2f1));
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TestSingleNoSwap(int16_t(0xf2f1), int16_t(0xf2f1));
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TestSingleNoSwap(int32_t(0xf4f3f2f1), int32_t(0xf4f3f2f1));
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TestSingleNoSwap(int64_t(0xf8f7f6f5f4f3f2f1), int64_t(0xf8f7f6f5f4f3f2f1));
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TestBulkSwap(uint16_values);
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TestBulkSwap(int16_values);
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TestBulkSwap(uint32_values);
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TestBulkSwap(int32_values);
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TestBulkSwap(uint64_values);
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TestBulkSwap(int64_values);
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TestBulkNoSwap(uint16_values);
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TestBulkNoSwap(int16_values);
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TestBulkNoSwap(uint32_values);
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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;
|
|
}
|