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 "platform.h"
35#include "type_traits.h"
36#include "integral_limits.h"
37
38namespace etl
39{
40 //***************************************************************************
41 // For signed types.
42 //***************************************************************************
43 template <typename T>
44 ETL_NODISCARD
45 ETL_CONSTEXPR
47 absolute(T value) ETL_NOEXCEPT
48 {
49 return (value < T(0)) ? -value : value;
50 }
51
52 //***************************************************************************
53 // For unsigned types.
54 //***************************************************************************
55 template <typename T>
56 ETL_NODISCARD
57 ETL_CONSTEXPR
59 absolute(T value) ETL_NOEXCEPT
60 {
61 return value;
62 }
63
64 //***************************************************************************
65 // For signed types.
66 // Returns the result as the unsigned type.
67 //***************************************************************************
68 template <typename T>
69 ETL_NODISCARD
70 ETL_CONSTEXPR
72 absolute_unsigned(T value) ETL_NOEXCEPT
73 {
74 typedef typename etl::make_unsigned<T>::type TReturn;
75
77 : (value < T(0)) ? TReturn(-value) : TReturn(value);
78 }
79
80 //***************************************************************************
81 // For unsigned types.
82 // Returns the result as the unsigned type.
83 //***************************************************************************
84 template <typename T>
85 ETL_NODISCARD
86 ETL_CONSTEXPR
88 absolute_unsigned(T value) ETL_NOEXCEPT
89 {
90 return etl::absolute(value);
91 }
92}
93
94#endif
95
Definition integral_limits.h:516
enable_if
Definition type_traits_generator.h:1254
make_unsigned
Definition type_traits_generator.h:1244
bitset_ext
Definition absolute.h:39