WCSWIDTH(P) POSIX Programmer's Manual WCSWIDTH(P)NAMEwcswidth - 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 ALSOwcwidth() , the Base Definitions volume of IEEE Std 1003.1-2001, Sec‐
tion 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(P)
