mirror of
https://github.com/ETLCPP/etl.git
synced 2026-10-29 02:17:09 +08:00
307 lines
4.8 KiB
Markdown
307 lines
4.8 KiB
Markdown
---
|
|
title: "math"
|
|
---
|
|
|
|
{{< callout type="info">}}
|
|
Header: `math.h`
|
|
From: `20.50.0`
|
|
{{< /callout >}}
|
|
|
|
Various mathematical utilities
|
|
|
|
## is_nan
|
|
|
|
```cpp
|
|
template <typename T>
|
|
ETL_CONSTEXPR bool is_nan(T value)
|
|
```
|
|
**Returns**
|
|
`true` if `value` is `NAN` (Not A Number).
|
|
Always returns `false` if `T` is an integral.
|
|
|
|
## is_infinity
|
|
|
|
```cpp
|
|
template <typename T>
|
|
ETL_CONSTEXPR bool is_infinity(T value)
|
|
```
|
|
**Returns**
|
|
`true` if `value` is infinity.
|
|
Always returns `false` if `T` is an integral.
|
|
|
|
## is_zero
|
|
|
|
```cpp
|
|
template <typename T>
|
|
ETL_CONSTEXPR bool is_zero(T value)
|
|
```
|
|
**Returns**
|
|
`true` if `value` is Zero.
|
|
|
|
## is_exactly_zero
|
|
|
|
```cpp
|
|
template <typename T>
|
|
ETL_CONSTEXPR bool is_exactly_equal(T value1, T value2)
|
|
```
|
|
**Returns**
|
|
`true` if `value1` is equal to `value2`.
|
|
|
|
## floor
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float floor(float value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::floorf` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::floorf(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double floor(double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::floor` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::floor(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double floor(long double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::floorl` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::floor` with casts to `double`.
|
|
otherwise
|
|
`::floorl(value)`
|
|
|
|
## ceil
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float ceil(float value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::ceilf` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::ceilf(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double ceil(double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::ceil` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::ceil(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double ceil(long double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::ceill` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::ceil` with casts to `double`.
|
|
otherwise
|
|
`::ceill(value)`
|
|
|
|
## log10
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float log10(float value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::log10f` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::log10f(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double log10(double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::log10` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::log10(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double log10(long double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::log10l` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::log10` with casts to `double`.
|
|
otherwise
|
|
`::log10l(value)`
|
|
|
|
## round
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float round(float value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::roundf` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::roundf(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double round(double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::round` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::round(value)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double round(long double value) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::roundl` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::round` with casts to `double`.
|
|
otherwise
|
|
`::roundl(value)`
|
|
|
|
## pow
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float pow(float base, float exponent) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::powf` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::powf(base, exponent)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double pow(double base, double exponent) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::pow` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::pow(base, exponent)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double pow(long double base, long double exponent) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::powl` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::pow` with casts to `double`.
|
|
otherwise
|
|
`::powl(base, intpart)`
|
|
|
|
## modf
|
|
|
|
Defined in the `etl::math` namespace.
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
float modf(float value, float* intpart) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::modff` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::modff(value, intpart)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
double modf(double value, double* intpart) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::modf` in `<math.h>`.
|
|
|
|
**Returns**
|
|
`::modf(value, intpart)`
|
|
|
|
---
|
|
|
|
```cpp
|
|
ETL_NODISCARD
|
|
long double modf(long double value, long double* intpart) ETL_NOEXCEPT
|
|
```
|
|
**Description**
|
|
A wrapper around `::modfl` in `<math.h>`.
|
|
|
|
**Returns**
|
|
If `ETL_NO_LONG_DOUBLE_MATH` is defined then returns
|
|
`::modf` with casts to `double`.
|
|
otherwise
|
|
`::modfl(value, intpart)`
|