test_cstddef.cpp revision 84011c7599ab8a4463cefda5e8ce8a59987640d8 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29// Test that including cstddef works. This should be the only include in this
30// file to make sure that we don't pick definitions without us knowing.
31#include <cstddef>
32
33namespace {
34const int kPassed = 0;
35const int kFailed = 1;
36#define FAIL_UNLESS(f) if (!android::f()) return kFailed;
37}  // anonymous namespace
38
39namespace android {
40// Dummy struct used to calculate offset of some of its fields.
41struct Foo
42{
43    char field1;
44    char field2;
45};
46
47// Check various types are declared in the std namespace.
48bool testTypesStd()
49{
50    // size_t should be defined in both namespaces
51    volatile ::size_t size_t_in_top_ns = 0;
52    volatile ::std::size_t size_t_in_std_ns = 0;
53
54    if (sizeof(::size_t) != sizeof(::std::size_t))
55    {
56        return false;
57    }
58
59    // ptrdiff_t should be defined in both namespaces
60    volatile ::ptrdiff_t ptrdiff_t_in_top_ns = 0;
61    volatile ::std::ptrdiff_t ptrdiff_t_in_std_ns = 0;
62
63    if (sizeof(::ptrdiff_t) != sizeof(::std::ptrdiff_t))
64    {
65        return false;
66    }
67    // NULL is only in the top namespace
68    volatile int *null_is_defined = NULL;
69    return true;
70}
71
72bool testOffsetOf()
73{
74#ifndef offsetof
75#error "offsetof is not a macro"
76#endif
77
78    // offsetof is only in the top namespace
79    volatile size_t offset = offsetof(struct Foo, field2);
80    return offset == 1;
81}
82
83bool testNull()
84{
85#ifndef NULL
86#error "NULL is not a macro"
87#endif
88    // If NULL is void* this will issue a warning.
89    volatile int null_is_not_void_star = NULL;
90    return true;
91}
92
93}  // android namespace
94
95int main(int argc, char **argv)
96{
97    FAIL_UNLESS(testTypesStd);
98    FAIL_UNLESS(testOffsetOf);
99    FAIL_UNLESS(testNull);
100    return kPassed;
101}
102