wcsspn(3)                  Library Functions Manual                  wcsspn(3)

NAME
       wcsspn - get length of a prefix wide-character substring

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <wchar.h>

       size_t wcsspn(const wchar_t *wcs, const wchar_t *accept);

DESCRIPTION
       The wcsspn() function is the wide-character equivalent of the strspn(3)
       function.  It determines the length of the longest initial segment of
       wcs which consists entirely of wide-characters listed in accept.  In
       other words, it searches for the first occurrence in the wide-character
       string wcs of a wide-character not contained in the wide-character
       string accept.

RETURN VALUE
       The wcsspn() function returns the number of wide characters in the
       longest initial segment of wcs which consists entirely of wide-
       characters listed in accept.  In other words, it returns the position
       of the first occurrence in the wide-character string wcs of a wide-
       character not contained in the wide-character string accept, or
       wcslen(wcs) if there is none.

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

       +--------------------------------------------+---------------+---------+
       |Interface                                   | Attribute     | Value   |
       +--------------------------------------------+---------------+---------+
       |wcsspn ()                                   | Thread safety | MT-Safe |
       +--------------------------------------------+---------------+---------+
STANDARDS
       C11, POSIX.1-2008.

HISTORY
       POSIX.1-2001, C99.

SEE ALSO
       strspn(3), wcscspn(3)

Linux man-pages 6.7               2023-10-31                         wcsspn(3)