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Diffstat (limited to '')
| -rw-r--r-- | mfbt/tests/TestCasting.cpp | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/mfbt/tests/TestCasting.cpp b/mfbt/tests/TestCasting.cpp new file mode 100644 index 0000000000..8c602589c0 --- /dev/null +++ b/mfbt/tests/TestCasting.cpp @@ -0,0 +1,99 @@ +/* -*- 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/Casting.h" + +#include <stdint.h> + +using mozilla::BitwiseCast; +using mozilla::detail::IsInBounds; + +template <typename Uint, typename Ulong, bool = (sizeof(Uint) == sizeof(Ulong))> +struct UintUlongBitwiseCast; + +template <typename Uint, typename Ulong> +struct UintUlongBitwiseCast<Uint, Ulong, true> { + static void test() { + MOZ_RELEASE_ASSERT(BitwiseCast<Ulong>(Uint(8675309)) == Ulong(8675309)); + } +}; + +template <typename Uint, typename Ulong> +struct UintUlongBitwiseCast<Uint, Ulong, false> { + static void test() {} +}; + +static void TestBitwiseCast() { + MOZ_RELEASE_ASSERT(BitwiseCast<int>(int(8675309)) == int(8675309)); + UintUlongBitwiseCast<unsigned int, unsigned long>::test(); +} + +static void TestSameSize() { + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(0)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, uint16_t>(uint16_t(UINT16_MAX)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int16_t>(uint16_t(0)))); + MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, int16_t>(uint16_t(-1)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(-1)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, uint16_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((IsInBounds<int32_t, uint32_t>(int32_t(INT32_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint32_t>(int32_t(INT32_MIN)))); +} + +static void TestToBiggerSize() { + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(0)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, uint32_t>(uint16_t(UINT16_MAX)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(0)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(-1)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(-1)))); + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, uint32_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((IsInBounds<int32_t, uint64_t>(int32_t(INT32_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint64_t>(int32_t(INT32_MIN)))); +} + +static void TestToSmallerSize() { + MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int8_t>(int16_t(0)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, uint8_t>(uint16_t(UINT16_MAX)))); + MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int8_t>(uint16_t(0)))); + MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, int8_t>(uint16_t(-1)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(-1)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MIN)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MIN)))); + + // Boundary cases + MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) - 1))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN)))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) + 1))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) - 1))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) + 1))); + + MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(-1)))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(0)))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(1)))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) - 1))); + MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX)))); + MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) + 1))); +} + +int main() { + TestBitwiseCast(); + + TestSameSize(); + TestToBiggerSize(); + TestToSmallerSize(); + + return 0; +} |