Embedded Template Library 1.0
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absolute.h
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1
2
3/******************************************************************************
4The MIT License(MIT)
5
6Embedded Template Library.
7https://github.com/ETLCPP/etl
8https://www.etlcpp.com
9
10Copyright(c) 2018 John Wellbelove
11
12Permission is hereby granted, free of charge, to any person obtaining a copy
13of this software and associated documentation files(the "Software"), to deal
14in the Software without restriction, including without limitation the rights
15to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
16copies of the Software, and to permit persons to whom the Software is
17furnished to do so, subject to the following conditions :
18
19The above copyright notice and this permission notice shall be included in all
20copies or substantial portions of the Software.
21
22THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
25AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28SOFTWARE.
29******************************************************************************/
30
31#ifndef ETL_ABSOLUTE_INCLUDED
32#define ETL_ABSOLUTE_INCLUDED
33
34#include "type_traits.h"
35#include "integral_limits.h"
36
37namespace etl
38{
39 //***************************************************************************
40 // For signed types.
41 //***************************************************************************
42 template <typename T>
43 ETL_NODISCARD
44 ETL_CONSTEXPR
46 absolute(T value) ETL_NOEXCEPT
47 {
48 return (value < T(0)) ? -value : value;
49 }
50
51 //***************************************************************************
52 // For unsigned types.
53 //***************************************************************************
54 template <typename T>
55 ETL_NODISCARD
56 ETL_CONSTEXPR
58 absolute(T value) ETL_NOEXCEPT
59 {
60 return value;
61 }
62
63 //***************************************************************************
64 // For signed types.
65 // Returns the result as the unsigned type.
66 //***************************************************************************
67#if ETL_USING_CPP11
68 template <typename T, typename TReturn = typename etl::make_unsigned<T>::type>
69#else
70 template <typename T, typename TReturn>
71 #endif
72 ETL_NODISCARD
73 ETL_CONSTEXPR
74 typename etl::enable_if<etl::is_signed<T>::value, TReturn>::type
75 absolute_unsigned(T value) ETL_NOEXCEPT
76 {
78 : (value < T(0)) ? TReturn(-value) : TReturn(value);
79 }
80
81 //***************************************************************************
82 // For unsigned types.
83 // Returns the result as the unsigned type.
84 //***************************************************************************
85 template <typename T>
86 ETL_NODISCARD
87 ETL_CONSTEXPR
89 absolute_unsigned(T value) ETL_NOEXCEPT
90 {
91 return etl::absolute(value);
92 }
93}
94
95#endif
96
Definition integral_limits.h:516
enable_if
Definition type_traits_generator.h:1186
bitset_ext
Definition absolute.h:38