PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT

WCSWIDTH(3P)              POSIX Programmer's Manual             WCSWIDTH(3P)

PROLOG         top

       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         top

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

SYNOPSIS         top

       #include <wchar.h>

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

DESCRIPTION         top

       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         top

       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         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       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         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       wcwidth(3p)

       The Base Definitions volume of POSIX.1‐2008, Section 3.103, Column
       Position, wchar.h(0p)

COPYRIGHT         top

       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 .

IEEE/The Open Group                 2013                        WCSWIDTH(3P)

Pages that refer to this page: wchar.h(0p)wcwidth(3p)