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Manual Reference Pages  - WCWIDTH (3)

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wcwidth - determine columns needed for a wide character

CONTENTS

Synopsis
Description
Notes

#include <wchar.h> 



int wcwidth(wchar_t c); 

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 L’\0’, the value is 0. Otherwise -1 is returned.

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

UNIX98, POSIX 1003.1-2001 Note that glibc before 2.2.5 used the prototype

int wcwidth(wint_t c); 

wcswidth(3), iswprint(3)

The behaviour of wcwidth depends on the LC_CTYPE category of the current locale.

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