wcswidth(3p) — Linux manual page

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.1‐2017, Section 3.103, Column
       Position, wchar.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 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 .

       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                2017                      WCSWIDTH(3P)

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

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