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#ifndef ANDROID_ASTL_FUNCTIONAL__
31#define ANDROID_ASTL_FUNCTIONAL__
32
33#if defined(_T) || defined(_Arg) || defined(_Arg1) || defined(_Arg2) || \
34    defined(_Result) || defined(_Name) || defined(_Op)
35#error "Macro(s) already defined."
36#endif
37
38namespace std {
39
40template <class _Arg, class _Result>
41struct unary_function {
42    typedef _Arg    argument_type;
43    typedef _Result result_type;
44};
45
46template <class _Arg1, class _Arg2, class _Result>
47struct binary_function {
48    typedef _Arg1   first_argument_type;
49    typedef _Arg2   second_argument_type;
50    typedef _Result result_type;
51};
52
53// Comparaison
54
55#define FUNCTIONAL_BINARY_COMPARAISON(_Name, _Op)              \
56    template <typename _T>                                     \
57    struct _Name : public binary_function<_T, _T, bool>        \
58    {                                                          \
59        bool operator()(const _T& left, const _T& right) const \
60        { return left _Op right; }                             \
61    };
62
63FUNCTIONAL_BINARY_COMPARAISON(equal_to, ==)
64FUNCTIONAL_BINARY_COMPARAISON(not_equal_to, !=)
65FUNCTIONAL_BINARY_COMPARAISON(greater, >)
66FUNCTIONAL_BINARY_COMPARAISON(less, <)
67FUNCTIONAL_BINARY_COMPARAISON(greater_equal, >=)
68FUNCTIONAL_BINARY_COMPARAISON(less_equal, <=)
69
70}  // namespace std
71
72#endif  // ANDROID_ASTL_FUNCTIONAL__
73