1WCSWIDTH(3P)               POSIX Programmer's Manual              WCSWIDTH(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

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

16       #include <wchar.h>
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18       int wcswidth(const wchar_t *pwcs, size_t n);
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DESCRIPTION

21       The wcswidth() function shall determine the number of column  positions
22       required  for  n  wide-character  codes (or fewer than n wide-character
23       codes if a null wide-character code is encountered before n  wide-char‐
24       acter codes are exhausted) in the string pointed to by pwcs.
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RETURN VALUE

27       The wcswidth() function either shall return 0 (if pwcs points to a null
28       wide-character code), or return the number of column  positions  to  be
29       occupied  by the wide-character string pointed to by pwcs, or return −1
30       (if any of the first  n  wide-character  codes  in  the  wide-character
31       string pointed to by pwcs is not a printable wide-character code).
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ERRORS

34       No errors are defined.
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36       The following sections are informative.
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EXAMPLES

39       None.
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APPLICATION USAGE

42       This  function  was  removed from the final ISO/IEC 9899:1990/Amendment
43       1:1995 (E), and the return value for a non-printable wide character  is
44       not specified.
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RATIONALE

47       None.
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FUTURE DIRECTIONS

50       None.
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SEE ALSO

53       wcwidth()
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55       The  Base  Definitions  volume  of  POSIX.1‐2008, Section 3.103, Column
56       Position, <wchar.h>
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59       Portions of this text are reprinted and reproduced in  electronic  form
60       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
61       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
62       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
63       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
64       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
65       event of any discrepancy between this version and the original IEEE and
66       The  Open Group Standard, the original IEEE and The Open Group Standard
67       is the referee document. The original Standard can be  obtained  online
68       at http://www.unix.org/online.html .
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70       Any  typographical  or  formatting  errors that appear in this page are
71       most likely to have been introduced during the conversion of the source
72       files  to  man page format. To report such errors, see https://www.ker‐
73       nel.org/doc/man-pages/reporting_bugs.html .
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77IEEE/The Open Group                  2013                         WCSWIDTH(3P)
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