wcsnlen

WCSNLEN(3)                 Linux Programmer's Manual                WCSNLEN(3)



NAME
       wcsnlen - determine the length of a fixed-size wide-character string

SYNOPSIS
       #include <wchar.h>

       size_t wcsnlen(const wchar_t *s, size_t maxlen);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       wcsnlen():
           Since glibc 2.10:
               _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _GNU_SOURCE

DESCRIPTION
       The wcsnlen() function is the wide-character equivalent of the
       strnlen(3) function.  It returns the number of wide-characters in the
       string pointed to by s, not including the terminating null wide
       character (L'\0'), but at most maxlen wide characters (note: this
       parameter is not a byte count).  In doing this, wcsnlen() looks at only
       the first maxlen wide characters at s and never beyond s+maxlen.

RETURN VALUE
       The wcsnlen() function returns wcslen(s), if that is less than maxlen,
       or maxlen if there is no null wide character among the first maxlen
       wide characters pointed to by s.

VERSIONS
       The wcsnlen() function is provided in glibc since version 2.1.

ATTRIBUTES
       For an explanation of the terms used in this section, see
       attributes(7).

       ┌──────────┬───────────────┬─────────┐
       │Interface Attribute     Value   │
       ├──────────┼───────────────┼─────────┤
       │wcsnlen() │ Thread safety │ MT-Safe │
       └──────────┴───────────────┴─────────┘
CONFORMING TO
       POSIX.1-2008.

SEE ALSO
       strnlen(3), wcslen(3)

COLOPHON
       This page is part of release 5.06 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.



GNU                               2019-03-06                        WCSNLEN(3)