wcslen(3) — Linux manual page

wcslen(3)                Library Functions Manual               wcslen(3)

NAME         top

       wcslen - determine the length of a wide-character string

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <wchar.h>

       size_t wcslen(const wchar_t *s);

DESCRIPTION         top

       The wcslen() function is the wide-character equivalent of the
       strlen(3) function.  It determines the length of the wide-
       character string pointed to by s, excluding the terminating null
       wide character (L'\0').

RETURN VALUE         top

       The wcslen() function returns the number of wide characters in s.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                            │ Attribute     │ Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │ wcslen()                             │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, C99.

NOTES         top

       In cases where the input buffer may not contain a terminating null
       wide character, wcsnlen(3) should be used instead.

SEE ALSO         top

       strlen(3)

COLOPHON         top

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Linux man-pages 6.15            2025-05-17                      wcslen(3)

Pages that refer to this page: strlen(3),  wcsnlen(3),  signal-safety(7)

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