wcslen(3p) — Linux manual page

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

       wcslen, wcsnlen — get length of a fixed-sized wide-character
       string

SYNOPSIS         top

       #include <wchar.h>

       size_t wcslen(const wchar_t *ws);
       size_t wcsnlen(const wchar_t *ws, size_t maxlen);

DESCRIPTION         top

       For wcslen(): The functionality described on this reference page
       is aligned with the ISO C standard. Any conflict between the
       requirements described here and the ISO C standard is
       unintentional. This volume of POSIX.1‐2017 defers to the ISO C
       standard.

       The wcslen() function shall compute the number of wide-character
       codes in the wide-character string to which ws points, not
       including the terminating null wide-character code.

       The wcsnlen() function shall compute the smaller of the number of
       wide characters in the array to which ws points, not including any
       terminating null wide-character code, and the value of maxlen.
       The wcsnlen() function shall never examine more than the first
       maxlen characters of the wide-character array pointed to by ws.

RETURN VALUE         top

       The wcslen() function shall return the length of ws.

       The wcsnlen() function shall return the number of wide characters
       preceding the first null wide-character code in the array to which
       ws points, if ws contains a null wide-character code within the
       first maxlen wide characters; otherwise, it shall return maxlen.

       No return values are reserved to indicate an error.

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       strlen(3p)

       The Base Definitions volume of POSIX.1‐2017, 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                        WCSLEN(3P)

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

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