1 /* GLib testing framework examples and tests
2 *
3 * Copyright © 2018 Endless Mobile, Inc.
4 *
5 * SPDX-License-Identifier: LGPL-2.1-or-later
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General
18 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
19 *
20 * Author: Philip Withnall <withnall@endlessm.com>
21 */
22
23 #include <glib.h>
24
25 #ifdef G_CXX_STD_VERSION
26 #error G_CXX_STD_VERSION should be undefined in C programs
27 #endif
28
29 G_STATIC_ASSERT (!G_CXX_STD_CHECK_VERSION (98));
30 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (89));
31 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (90));
32
33 #if G_C_STD_VERSION >= 199000L
34 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (89));
35 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (90));
36 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (199000L));
37 #endif
38
39 #if G_C_STD_VERSION == 198900L
40 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (99));
41 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (199901L));
42 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (11));
43 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (201112L));
44 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (17));
45 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (201710L));
46 #endif
47
48 #if G_C_STD_VERSION >= 199901L
49 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (99));
50 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (199901L));
51 #endif
52
53 #if G_C_STD_VERSION == 199901L
54 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (11));
55 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (201112L));
56 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (17));
57 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (201710L));
58 #endif
59
60 #if G_C_STD_VERSION >= 201112L
61 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (11));
62 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (201112L));
63 #endif
64
65 #if G_C_STD_VERSION == 201112L
66 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (17));
67 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (201710L));
68 #endif
69
70 #if G_C_STD_VERSION >= 201710L
71 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (17));
72 G_STATIC_ASSERT (G_C_STD_CHECK_VERSION (201710L));
73 #endif
74
75 #if G_C_STD_VERSION == 201710L
76 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (23));
77 G_STATIC_ASSERT (!G_C_STD_CHECK_VERSION (202300L));
78 #endif
79
80 #ifdef _G_EXPECTED_C_STANDARD
81 static void
82 test_c_standard (void)
83 {
84 guint64 std_version = 0;
85
86 if (!g_ascii_string_to_unsigned (_G_EXPECTED_C_STANDARD, 10, 0, G_MAXUINT64,
87 &std_version, NULL))
88 {
89 g_test_skip ("Expected standard value is non-numeric: "
90 _G_EXPECTED_C_STANDARD);
91 return;
92 }
93
94 g_assert_true (G_C_STD_CHECK_VERSION (std_version));
95
96 if (std_version > 80 && std_version < 99)
97 std_version = 90;
98
99 if (std_version >= 90)
100 g_assert_cmpuint (G_C_STD_VERSION, >=, (std_version + 1900) * 100);
101 else
102 g_assert_cmpuint (G_C_STD_VERSION, >=, (std_version + 2000) * 100);
103 }
104 #endif
105
106 /* Test that G_STATIC_ASSERT_EXPR can be used as an expression */
107 static void
108 test_assert_static (void)
109 {
110 G_STATIC_ASSERT (4 == 4);
111 if (G_STATIC_ASSERT_EXPR (1 == 1), sizeof (gchar) == 2)
112 g_assert_not_reached ();
113 }
114
115 /* Test G_ALIGNOF() gives the same results as the G_STRUCT_OFFSET fallback. This
116 * should be the minimal alignment for the given type.
117 *
118 * This is necessary because the implementation of G_ALIGNOF() varies depending
119 * on the compiler in use. We want all implementations to be consistent.
120 *
121 * In the case that the compiler uses the G_STRUCT_OFFSET fallback, this test
122 * is a no-op. */
123 static void
124 test_alignof_fallback (void)
125 {
126 #define check_alignof(type) \
127 g_assert_cmpint (G_ALIGNOF (type), ==, G_STRUCT_OFFSET (struct { char a; type b; }, b))
128
129 check_alignof (char);
130 check_alignof (int);
131 check_alignof (float);
132 check_alignof (double);
133 check_alignof (struct { char a; int b; });
134 }
135
136 static void
137 test_struct_sizeof_member (void)
138 {
139 G_STATIC_ASSERT (G_SIZEOF_MEMBER (struct { char a; int b; }, a) == sizeof (char));
140 g_assert_cmpint (G_SIZEOF_MEMBER (struct { char a; int b; }, b), ==, sizeof (int));
141 }
142
143 int
144 main (int argc,
145 char *argv[])
146 {
147 g_test_init (&argc, &argv, NULL);
148
149 #ifdef _G_EXPECTED_C_STANDARD
150 g_test_add_func ("/C/standard-" _G_EXPECTED_C_STANDARD, test_c_standard);
151 #endif
152
153 g_test_add_func ("/alignof/fallback", test_alignof_fallback);
154 g_test_add_func ("/assert/static", test_assert_static);
155 g_test_add_func ("/struct/sizeof_member", test_struct_sizeof_member);
156
157 return g_test_run ();
158 }