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mfbt/tests/TestCasting.cpp@b8a032363ba2

mfbt/tests/TestCasting.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this file,

     4  * You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 

     6 #include "mozilla/Casting.h"

     7 

     8 #include <stdint.h>

     9 

    10 using mozilla::BitwiseCast;

    11 using mozilla::detail::IsInBounds;

    12 

    13 template<typename Uint, typename Ulong, bool = (sizeof(Uint) == sizeof(Ulong))>

    14 struct UintUlongBitwiseCast;

    15 

    16 template<typename Uint, typename Ulong>

    17 struct UintUlongBitwiseCast<Uint, Ulong, true>

    18 {

    19     static void test() {

    20       MOZ_RELEASE_ASSERT(BitwiseCast<Ulong>(Uint(8675309)) == Ulong(8675309));

    21     }

    22 };

    23 

    24 template<typename Uint, typename Ulong>

    25 struct UintUlongBitwiseCast<Uint, Ulong, false>

    26 {

    27     static void test() { }

    28 };

    29 

    30 static void

    31 TestBitwiseCast()

    32 {

    33   MOZ_RELEASE_ASSERT(BitwiseCast<int>(int(8675309)) == int(8675309));

    34   UintUlongBitwiseCast<unsigned int, unsigned long>::test();

    35 }

    36 

    37 static void

    38 TestSameSize()

    39 {

    40   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(0))));

    41   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MIN))));

    42   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int16_t>(int16_t(INT16_MAX))));

    43   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, uint16_t>(uint16_t(UINT16_MAX))));

    44   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int16_t>(uint16_t(0))));

    45   MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, int16_t>(uint16_t(-1))));

    46   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(-1))));

    47   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, uint16_t>(int16_t(INT16_MAX))));

    48   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint16_t>(int16_t(INT16_MIN))));

    49   MOZ_RELEASE_ASSERT((IsInBounds<int32_t, uint32_t>(int32_t(INT32_MAX))));

    50   MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint32_t>(int32_t(INT32_MIN))));

    51 }

    52 

    53 static void

    54 TestToBiggerSize()

    55 {

    56   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(0))));

    57   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MIN))));

    58   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int32_t>(int16_t(INT16_MAX))));

    59   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, uint32_t>(uint16_t(UINT16_MAX))));

    60   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(0))));

    61   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int32_t>(uint16_t(-1))));

    62   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(-1))));

    63   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, uint32_t>(int16_t(INT16_MAX))));

    64   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint32_t>(int16_t(INT16_MIN))));

    65   MOZ_RELEASE_ASSERT((IsInBounds<int32_t, uint64_t>(int32_t(INT32_MAX))));

    66   MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint64_t>(int32_t(INT32_MIN))));

    67 }

    68 

    69 static void

    70 TestToSmallerSize()

    71 {

    72   MOZ_RELEASE_ASSERT((IsInBounds<int16_t, int8_t>(int16_t(0))));

    73   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MIN))));

    74   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, int8_t>(int16_t(INT16_MAX))));

    75   MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, uint8_t>(uint16_t(UINT16_MAX))));

    76   MOZ_RELEASE_ASSERT((IsInBounds<uint16_t, int8_t>(uint16_t(0))));

    77   MOZ_RELEASE_ASSERT((!IsInBounds<uint16_t, int8_t>(uint16_t(-1))));

    78   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(-1))));

    79   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MAX))));

    80   MOZ_RELEASE_ASSERT((!IsInBounds<int16_t, uint8_t>(int16_t(INT16_MIN))));

    81   MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MAX))));

    82   MOZ_RELEASE_ASSERT((!IsInBounds<int32_t, uint16_t>(int32_t(INT32_MIN))));

    83 

    84   // Boundary cases

    85   MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) - 1)));

    86   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN))));

    87   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MIN) + 1)));

    88   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) - 1)));

    89   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX))));

    90   MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, int32_t>(int64_t(INT32_MAX) + 1)));

    91 

    92   MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(-1))));

    93   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(0))));

    94   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(1))));

    95   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) - 1)));

    96   MOZ_RELEASE_ASSERT((IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX))));

    97   MOZ_RELEASE_ASSERT((!IsInBounds<int64_t, uint32_t>(int64_t(UINT32_MAX) + 1)));

    98 }

    99 

   100 int

   101 main()

   102 {

   103   TestBitwiseCast();

   104 

   105   TestSameSize();

   106   TestToBiggerSize();

   107   TestToSmallerSize();

   108 }

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