1 /*
2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "memory/allocation.hpp"
27 #include "metaprogramming/integerTypes.hpp"
28 #include "metaprogramming/isSame.hpp"
29 #include "unittest.hpp"
30 #include "utilities/debug.hpp"
31
32 struct IntegerTypesTestSupport: AllStatic {
33
34 template<size_t byte_size> struct SignedTypeOfSize;
35 template<size_t byte_size> struct UnsignedTypeOfSize;
36
37 template<typename T> struct Signed;
38 template<typename T> struct Unsigned;
39 };
40
41 #define DEFINE_CANONICAL_SIGNED_TYPE(T) \
42 template<> \
43 struct IntegerTypesTestSupport::SignedTypeOfSize<sizeof(T)> \
44 : public AllStatic \
45 { \
46 typedef T type; \
47 };
48
49 #define DEFINE_CANONICAL_UNSIGNED_TYPE(T) \
50 template<> \
51 struct IntegerTypesTestSupport::UnsignedTypeOfSize<sizeof(T)> \
52 : public AllStatic \
53 { \
54 typedef T type; \
55 };
56
57 #define DEFINE_INTEGER_TYPES_OF_SIZE(NBITS) \
58 DEFINE_CANONICAL_SIGNED_TYPE(int ## NBITS ## _t) \
59 DEFINE_CANONICAL_UNSIGNED_TYPE(uint ## NBITS ## _t)
60
61 DEFINE_INTEGER_TYPES_OF_SIZE(8)
62 DEFINE_INTEGER_TYPES_OF_SIZE(16)
63 DEFINE_INTEGER_TYPES_OF_SIZE(32)
64 DEFINE_INTEGER_TYPES_OF_SIZE(64)
65
66 #undef DEFINE_INTEGER_TYPES_OF_SIZE
67 #undef DEFINE_CANONICAL_SIGNED_TYPE
68 #undef DEFINE_CANONICAL_UNSIGNED_TYPE
69
70 template<typename T>
71 struct IntegerTypesTestSupport::Signed
72 : public SignedTypeOfSize<sizeof(T)>
73 {};
74
75 template<typename T>
76 struct IntegerTypesTestSupport::Unsigned
77 : public UnsignedTypeOfSize<sizeof(T)>
78 {};
79
80 TEST(IntegerTypesTest, round_trip_int) {
81 int sfive = 5;
82 int mfive = -5;
83 uint ufive = 5u;
84
85 typedef IntegerTypesTestSupport::Signed<int>::type SI;
86 typedef IntegerTypesTestSupport::Unsigned<int>::type UI;
87
88 EXPECT_EQ(sfive, IntegerTypes::cast<int>(IntegerTypes::cast<SI>(sfive)));
89 EXPECT_EQ(sfive, IntegerTypes::cast<int>(IntegerTypes::cast<UI>(sfive)));
90
91 EXPECT_EQ(mfive, IntegerTypes::cast<int>(IntegerTypes::cast<SI>(mfive)));
92 EXPECT_EQ(mfive, IntegerTypes::cast<int>(IntegerTypes::cast<UI>(mfive)));
93
94 EXPECT_EQ(ufive, IntegerTypes::cast<uint>(IntegerTypes::cast<SI>(ufive)));
95 EXPECT_EQ(ufive, IntegerTypes::cast<uint>(IntegerTypes::cast<UI>(ufive)));
96 }
97
98 TEST(IntegerTypesTest, round_trip_float) {
99 float ffive = 5.0f;
100 double dfive = 5.0;
101
102 typedef IntegerTypesTestSupport::Signed<float>::type SF;
103 typedef IntegerTypesTestSupport::Unsigned<float>::type UF;
104
105 typedef IntegerTypesTestSupport::Signed<double>::type SD;
106 typedef IntegerTypesTestSupport::Unsigned<double>::type UD;
107
108 EXPECT_EQ(ffive, IntegerTypes::cast<float>(IntegerTypes::cast<SF>(ffive)));
109 EXPECT_EQ(ffive, IntegerTypes::cast<float>(IntegerTypes::cast<UF>(ffive)));
110
111 EXPECT_EQ(dfive, IntegerTypes::cast<double>(IntegerTypes::cast<SD>(dfive)));
112 EXPECT_EQ(dfive, IntegerTypes::cast<double>(IntegerTypes::cast<UD>(dfive)));
113 }
114
115 TEST(IntegerTypesTest, round_trip_ptr) {
116 int five = 5;
117 int* pfive = &five;
118 const int* cpfive = &five;
119
120 typedef IntegerTypesTestSupport::Signed<int*>::type SIP;
121 typedef IntegerTypesTestSupport::Unsigned<int*>::type UIP;
122
123 EXPECT_EQ(pfive, IntegerTypes::cast<int*>(IntegerTypes::cast<SIP>(pfive)));
124 EXPECT_EQ(pfive, IntegerTypes::cast<int*>(IntegerTypes::cast<UIP>(pfive)));
125
126 EXPECT_EQ(cpfive, IntegerTypes::cast<const int*>(IntegerTypes::cast<SIP>(cpfive)));
127 EXPECT_EQ(cpfive, IntegerTypes::cast<const int*>(IntegerTypes::cast<UIP>(cpfive)));
128 }