PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.

NAME

       wcswidth — number of column positions of a wide-character string

SYNOPSIS

       #include <wchar.h>

       int wcswidth(const wchar_t *pwcs, size_t n);

DESCRIPTION

       The  wcswidth()  function  shall  determine  the number of column positions required for n
       wide-character codes (or fewer than n wide-character codes if a null  wide-character  code
       is  encountered  before  n wide-character codes are exhausted) in the string pointed to by
       pwcs.

RETURN VALUE

       The wcswidth() function either shall return 0 (if pwcs points  to  a  null  wide-character
       code),  or  return  the  number  of  column positions to be occupied by the wide-character
       string pointed to by pwcs, or return −1 (if any of the first n wide-character codes in the
       wide-character string pointed to by pwcs is not a printable wide-character code).

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       This  function  was removed from the final ISO/IEC 9899:1990/Amendment 1:1995 (E), and the
       return value for a non-printable wide character is not specified.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       wcwidth()

       The Base Definitions volume of POSIX.1‐2008, Section 3.103, Column Position, <wchar.h>

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2013  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013  by  the
       Institute  of  Electrical  and  Electronics  Engineers,  Inc and The Open Group.  (This is
       POSIX.1-2008 with the  2013  Technical  Corrigendum  1  applied.)  In  the  event  of  any
       discrepancy  between  this  version and the original IEEE and The Open Group Standard, the
       original IEEE and The Open Group Standard is the referee document. The  original  Standard
       can be obtained online at http://www.unix.org/online.html .

       Any  typographical  or  formatting errors that appear in this page are most likely to have
       been introduced during the conversion of the source files to man page  format.  To  report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .