test_cstddef.cpp revision 3cb2639f22f8aaf46852c9f03e825e05fc7e7362 
1/* -*- c++ -*- */
2/*
3 * Copyright (C) 2009 The Android Open Source Project
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *  * Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 *  * Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in
13 *    the documentation and/or other materials provided with the
14 *    distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
23 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30// Test that including cstddef works. This should be the only include in this
31// file to make sure that we don't pick definitions without us knowing.
32#include <cstddef>
33
34namespace {
35const int kPassed = 0;
36const int kFailed = 1;
37#define FAIL_UNLESS(f) if (!android::f()) return kFailed;
38}  // anonymous namespace
39
40namespace android {
41// Dummy struct used to calculate offset of some of its fields.
42struct Foo
43{
44    char field1;
45    char field2;
46};
47
48// Check various types are declared in the std namespace.
49bool testTypesStd()
50{
51    // size_t should be defined in both namespaces
52    volatile ::size_t size_t_in_top_ns = 0;
53    volatile ::std::size_t size_t_in_std_ns = 0;
54
55    if (sizeof(::size_t) != sizeof(::std::size_t))
56    {
57        return false;
58    }
59
60    // ptrdiff_t should be defined in both namespaces
61    volatile ::ptrdiff_t ptrdiff_t_in_top_ns = 0;
62    volatile ::std::ptrdiff_t ptrdiff_t_in_std_ns = 0;
63
64    if (sizeof(::ptrdiff_t) != sizeof(::std::ptrdiff_t))
65    {
66        return false;
67    }
68    // NULL is only in the top namespace
69    volatile int *null_is_defined = NULL;
70    return true;
71}
72
73bool testOffsetOf()
74{
75#ifndef offsetof
76#error "offsetof is not a macro"
77#endif
78
79    // offsetof is only in the top namespace
80    volatile size_t offset = offsetof(struct Foo, field2);
81    return offset == 1;
82}
83
84bool testNull()
85{
86#ifndef NULL
87#error "NULL is not a macro"
88#endif
89    // If NULL is void* this will issue a warning.
90    volatile int null_is_not_void_star = NULL;
91    return true;
92}
93
94}  // android namespace
95
96int main(int argc, char **argv)
97{
98    FAIL_UNLESS(testTypesStd);
99    FAIL_UNLESS(testOffsetOf);
100    FAIL_UNLESS(testNull);
101    return kPassed;
102}
103