1/*
2 * Copyright (c) 2017, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * * Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of Intel Corporation nor the names of its contributors
13 * may be used to endorse or promote products derived from this software
14 * without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef UTIL_SMALL_VECTOR_H
30#define UTIL_SMALL_VECTOR_H
31
32#include <vector>
33
34#include <boost/version.hpp>
35
36/*
37 * We use the small_vector constructors introduced in Boost 1.61 (trac bug
38 * #11866, github commit b436c91). If the Boost version is too old, we fall
39 * back to using std::vector.
40 */
41#if BOOST_VERSION >= 106100
42# define HAVE_BOOST_CONTAINER_SMALL_VECTOR
43#endif
44
45#if defined(HAVE_BOOST_CONTAINER_SMALL_VECTOR)
46# include <boost/container/small_vector.hpp>
47#endif
48
49namespace ue2 {
50
51#if defined(HAVE_BOOST_CONTAINER_SMALL_VECTOR)
52
53template <class T, std::size_t N,
54 typename Allocator = boost::container::new_allocator<T>>
55using small_vector = boost::container::small_vector<T, N, Allocator>;
56
57#else
58
59// Boost version isn't new enough, fall back to just using std::vector.
60template <class T, std::size_t N, typename Allocator = std::allocator<T>>
61using small_vector = std::vector<T, Allocator>;
62
63// Support workarounds for flat_set/flat_map and GCC 4.8.
64#define SMALL_VECTOR_IS_STL_VECTOR 1
65
66#endif // HAVE_BOOST_CONTAINER_SMALL_VECTOR
67
68} // namespace ue2
69
70#endif // UTIL_SMALL_VECTOR_H
71