:man| Alphabetical   Categories   About us 
 
WCWIDTH (3) | C library functions | Unix Manual Pages | :man

NAME

wcwidth - "number of column positions of a wide-character code"

CONTENTS

Library
Synopsis
Description
Return Values
Examples
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In wchar.h int wcwidth "wchar_t wc"

DESCRIPTION

The wcwidth function determines the number of column positions required to display the wide character wc.

RETURN VALUES

The wcwidth function returns 0 if the wc argument is a null wide character (L’\0’), -1 if wc is not printable, otherwise it returns the number of column positions the character occupies.

EXAMPLES

This code fragment reads text from standard input and breaks lines that are more than 20 column positions wide, similar to the fold(1) utility:
wint_t ch;
int column, w;


column = 0;
while ((ch = getwchar()) != WEOF) {
w = wcwidth(ch);
if (w > 0 && column + w >= 20) {
putwchar(L’\n’);
column = 0;
}
putwchar(ch);
if (ch == L’\n’)
column = 0;
else if (w > 0)
column += w;
}

SEE ALSO

iswprint(3), wcswidth(3)

STANDARDS


Share this page

     Follow us

Facebook Twitter Google+ LinkedIn


 
Created by Blin Media, 2008-2013