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WCSWIDTH(3P)               POSIX Programmer's Manual              WCSWIDTH(3P)
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-char-
       acter 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 Electri-
       cal 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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013                         WCSWIDTH(3P)