LibreOffice: sal/macros.h Source File

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macros.h
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1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2/*
3 * This file is part of the LibreOffice project.
4 *
5 * This Source Code Form is subject to the terms of the Mozilla Public
6 * License, v. 2.0. If a copy of the MPL was not distributed with this
7 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 *
9 * This file incorporates work covered by the following license notice:
10 *
11 * Licensed to the Apache Software Foundation (ASF) under one or more
12 * contributor license agreements. See the NOTICE file distributed
13 * with this work for additional information regarding copyright
14 * ownership. The ASF licenses this file to you under the Apache
15 * License, Version 2.0 (the "License"); you may not use this file
16 * except in compliance with the License. You may obtain a copy of
17 * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 */
19
20/*
21 * This file is part of LibreOffice published API.
22 */
23
24#ifndef INCLUDED_SAL_MACROS_H
25#define INCLUDED_SAL_MACROS_H
26
27#include <stddef.h>
28
29#ifndef SAL_N_ELEMENTS
30# if defined(__cplusplus) && ( defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L )
31 /*
32 * Magic template to calculate at compile time the number of elements
33 * in an array. Enforcing that the argument must be an array and not
34 * a pointer, e.g.
35 * char *pFoo="foo";
36 * SAL_N_ELEMENTS(pFoo);
37 * fails while
38 * SAL_N_ELEMENTS("foo");
39 * or
40 * char aFoo[]="foo";
41 * SAL_N_ELEMENTS(aFoo);
42 * pass
43 *
44 * Unfortunately if arr is an array of an anonymous class then we need
45 * C++0x, i.e. see
46 * http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#757
47 */
48 template <typename T, size_t S> char (&sal_n_array_size( T(&)[S] ))[S];
49# define SAL_N_ELEMENTS(arr) (sizeof(sal_n_array_size(arr)))
50# else
51# define SAL_N_ELEMENTS(arr) (sizeof (arr) / sizeof ((arr)[0]))
52# endif
53#endif
54
55#ifndef SAL_STRINGIFY
56# define SAL_STRINGIFY_ARG(x) #x
57# define SAL_STRINGIFY(x) SAL_STRINGIFY_ARG(x)
58#endif
59
60#endif
61
62/* vim:set shiftwidth=4 softtabstop=4 expandtab: */