Linux manual pages Section 3  

Name

wcswidth — determine columns needed for a fixed-size wide-character string

Synopsis

#define _XOPEN_SOURCE              /* See feature_test_macros(7) */
#include <wchar.h>
int wcswidth( const wchar_t *s,
  size_t n);
 

DESCRIPTION

The wcswidth() function returns the number of columns needed to represent the wide-character string pointed to by s, but at most n wide characters. If a nonprintable wide character occurs among these characters, −1 is returned.

RETURN VALUE

The wcswidth() function returns the number of column positions for the wide-character string s, truncated to at most length n.

CONFORMING TO

POSIX.1-2001.

NOTES

The behavior of wcswidth() depends on the LC_CTYPE category of the current locale.

SEE ALSO

iswprint(3), wcwidth(3)

COLOPHON

This page is part of release 3.33 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man-pages/.


  Copyright (c) Bruno Haible <haibleclisp.cons.org>

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References consulted:
  GNU glibc-2 source code and manual
  Dinkumware C library reference http://www.dinkumware.com/
  OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html