gecko-dev/mfbt/tests/TestEndian.cpp
Nicholas Nethercote 6c3f5d7b8e Bug 1041914 - Convert the fourth quarter of MFBT to Gecko style. r=Ms2ger.
--HG--
extra : rebase_source : 588fa9c0d1e819e1826835c4ef4a1428a927bf93
2014-07-22 20:54:41 -07:00

473 lines
17 KiB
C++

/* -*- 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/Endian.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
}
// 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* 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;
}