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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 IEEE Std 1003.1-2001, Section
       3.103, Column Position, <wchar.h>
COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  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.opengroup.org/unix/online.html .

IEEE/The Open Group                  2003                         WCSWIDTH(3P)