gecko/mfbt/tests/TestCasting.cpp
2013-04-23 14:36:51 -07:00

81 lines
3.5 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "mozilla/StandardInteger.h"
using mozilla::detail::IsInBounds;
static void
TestSameSize()
{
MOZ_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(0))));
MOZ_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((IsInBounds<uint16_t, uint16_t>(uint16_t(UINT16_MAX))));
MOZ_ASSERT((IsInBounds<uint16_t, int16_t>(uint16_t(0))));
MOZ_ASSERT((!IsInBounds<uint16_t, int16_t>(uint16_t(-1))));
MOZ_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(-1))));
MOZ_ASSERT((IsInBounds<int16_t, uint16_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((IsInBounds<int32_t, uint32_t>(int32_t(INT32_MAX))));
MOZ_ASSERT((!IsInBounds<int32_t, uint32_t>(int32_t(INT32_MIN))));
}
static void
TestToBiggerSize()
{
MOZ_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(0))));
MOZ_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((IsInBounds<uint16_t, uint32_t>(uint16_t(UINT16_MAX))));
MOZ_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(0))));
MOZ_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(-1))));
MOZ_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(-1))));
MOZ_ASSERT((IsInBounds<int16_t, uint32_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((IsInBounds<int32_t, uint64_t>(int32_t(INT32_MAX))));
MOZ_ASSERT((!IsInBounds<int32_t, uint64_t>(int32_t(INT32_MIN))));
}
static void
TestToSmallerSize()
{
MOZ_ASSERT((IsInBounds<int16_t, int8_t>(int16_t(0))));
MOZ_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((!IsInBounds<uint16_t, uint8_t>(uint16_t(UINT16_MAX))));
MOZ_ASSERT((IsInBounds<uint16_t, int8_t>(uint16_t(0))));
MOZ_ASSERT((!IsInBounds<uint16_t, int8_t>(uint16_t(-1))));
MOZ_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(-1))));
MOZ_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MAX))));
MOZ_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MIN))));
MOZ_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MAX))));
MOZ_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MIN))));
// Boundary cases
MOZ_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) - 1)));
MOZ_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN))));
MOZ_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) + 1)));
MOZ_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) - 1)));
MOZ_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX))));
MOZ_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) + 1)));
MOZ_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(-1))));
MOZ_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(0))));
MOZ_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(1))));
MOZ_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) - 1)));
MOZ_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX))));
MOZ_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) + 1)));
}
int
main()
{
TestSameSize();
TestToBiggerSize();
TestToSmallerSize();
}