Embedded Template Library 1.0
absolute.h
Go to the documentation of this file.
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_CONSTEXPR typename etl::enable_if<etl::is_signed<T>::value, T>::type
44 absolute(T value)
45 {
46 return (value < T(0)) ? -value : value;
47 }
48
49 //***************************************************************************
50 // For unsigned types.
51 //***************************************************************************
52 template <typename T>
53 ETL_CONSTEXPR typename etl::enable_if<etl::is_unsigned<T>::value, T>::type
54 absolute(T value)
55 {
56 return value;
57 }
58
59 //***************************************************************************
60 // For signed types.
61 // Returns the result as the unsigned type.
62 //***************************************************************************
63#if ETL_USING_CPP11
64 template <typename T, typename TReturn = typename etl::make_unsigned<T>::type>
65#else
66 template <typename T, typename TReturn>
67 #endif
68 ETL_CONSTEXPR typename etl::enable_if<etl::is_signed<T>::value, TReturn>::type
69 absolute_unsigned(T value)
70 {
72 : (value < T(0)) ? TReturn(-value) : TReturn(value);
73 }
74
75 //***************************************************************************
76 // For unsigned types.
77 // Returns the result as the unsigned type.
78 //***************************************************************************
79 template <typename T>
80 ETL_CONSTEXPR typename etl::enable_if<etl::is_unsigned<T>::value, T>::type
81 absolute_unsigned(T value)
82 {
83 return etl::absolute(value);
84 }
85}
86
87#endif
88
Definition: integral_limits.h:468
enable_if
Definition: type_traits_generator.h:1191
bitset_ext
Definition: absolute.h:38