# wcwidth

**Repository Path**: RT-Thread-Mirror/wcwidth

## Basic Information

- **Project Name**: wcwidth
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2021-08-25
- **Last Updated**: 2022-02-18

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# wcwidth for RT-Thread POSIX(IEEE Std 1003.1-2001)

## NAME

```
       wcwidth - determine columns needed for a wide character
```

## SYNOPSIS

```
       #define _XOPEN_SOURCE       /* See feature_test_macros(7) */
       #include <wchar.h>

       int wcwidth(wchar_t c);
```

## DESCRIPTION

```
       The wcwidth() function returns the number of columns needed to
       represent the wide character c.  If c is a printable wide
       character, the value is at least 0.  If c is null wide character
       (L'\0'), the value is 0.  Otherwise, -1 is returned.
```

## RETURN VALUE

```
       The wcwidth() function returns the number of column positions for
       c.
```

## ATTRIBUTES

```
       For an explanation of the terms used in this section, see
       attributes(7).

       ┌───────────────────────────────┬───────────────┬────────────────┐
       │Interface                      │ Attribute     │ Value          │
       ├───────────────────────────────┼───────────────┼────────────────┤
       │wcwidth()                      │ Thread safety │ MT-Safe locale │
       └───────────────────────────────┴───────────────┴────────────────┘
```

## CONFORMING TO

```
       POSIX.1-2001, POSIX.1-2008.

       Note that glibc before 2.2.5 used the prototype

       int wcwidth(wint_t c);
```

## Other references: 

- https://github.com/joejulian/xterm/blob/master/wcwidth.c
- https://man7.org/linux/man-pages/man3/wcwidth.3.html

## Contact information

Maintainer: [Meco Man](https://github.com/mysterywolf)

Homepage: <https://github.com/mysterywolf/wcwidth>