Embedded Template Library 1.0
ratio.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) 2016 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
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27OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
28SOFTWARE.
29******************************************************************************/
30
31#ifndef ETL_RATIO_INCLUDED
32#define ETL_RATIO_INCLUDED
33
34#include "platform.h"
35
36#include <stddef.h>
37#include <stdint.h>
38
41
42namespace etl
43{
44 template <size_t NUM, size_t DEN = 1UL>
45 struct ratio
46 {
47 static ETL_CONSTANT intmax_t num = NUM;
48 static ETL_CONSTANT intmax_t den = DEN;
49 };
50
51 template <size_t NUM, size_t DEN>
52 ETL_CONSTANT intmax_t ratio<NUM, DEN>::num;
53
54 template <size_t NUM, size_t DEN>
55 ETL_CONSTANT intmax_t ratio<NUM, DEN>::den;
56
57 #if INT_MAX > INT32_MAX
61 typedef ratio<1, 1000000000000000> femto;
62 typedef ratio<1, 1000000000000> pico;
63 #endif
64
65 #if (INT_MAX >= INT32_MAX)
68 #endif
69
70 #if (INT_MAX >= INT16_MAX)
71 typedef ratio<1, 1000> milli;
72 typedef ratio<1, 100> centi;
73 typedef ratio<1, 10> deci;
74 typedef ratio<10, 1> deca;
75 typedef ratio<100, 1> hecto;
76 typedef ratio<1000, 1> kilo;
77 #endif
78
79 #if (INT_MAX >= INT32_MAX)
80 typedef ratio<1000000, 1> mega;
82 #endif
83
84 #if INT_MAX > INT32_MAX
85 typedef ratio<1000000000000, 1> tera;
86 typedef ratio<1000000000000000, 1> peta;
90 #endif
91
94
97
100}
101
102#endif
103
bitset_ext
Definition: absolute.h:38
ratio< 355, 113 > ratio_pi
An approximation of PI to 6 digits.
Definition: ratio.h:93
ratio< 326, 120 > ratio_e
An approximation of e.
Definition: ratio.h:99
ratio< 239, 169 > ratio_root2
An approximation of root 2.
Definition: ratio.h:96
Definition: ratio.h:46