wcwidth(3p) [centos man page]

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

PROLOG

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

NAME

       wcwidth - number of column positions of a wide-character code

SYNOPSIS

       #include <wchar.h>

       int wcwidth(wchar_t wc);

DESCRIPTION

       The wcwidth() function shall determine the number of column positions required for the wide character wc. The application shall ensure that
       the  value  of wc is a character representable as a wchar_t, and is a wide-character code corresponding to a valid character in the current
       locale.

RETURN VALUE

       The wcwidth() function shall either return 0 (if wc is a null wide-character code), or return the number of column positions to be occupied
       by the wide-character code wc, or return -1 (if wc does not correspond to 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

       wcswidth(), the Base Definitions volume of IEEE Std 1003.1-2001, <wchar.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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							       WCWIDTH(3P)

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 correspond-
       ing 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 Technol-
       ogy  --	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 Stan-
       dard 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)