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WCSWIDTH(3P) POSIX Programmer's Manual WCSWIDTH(3P)
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.
wcswidth — number of column positions of a wide-character string
#include <wchar.h>
int wcswidth(const wchar_t *pwcs, size_t n);
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.
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).
No errors are defined.
The following sections are informative.
None.
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.
None.
None.
wcwidth(3p)
The Base Definitions volume of POSIX.1‐2008, Section 3.103, Column
Position, wchar.h(0p)
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)