wcsspn(3) — Linux manual page

wcsspn(3)                Library Functions Manual               wcsspn(3)

NAME         top

       wcsspn - get length of a prefix wide-character substring

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <wchar.h>

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

DESCRIPTION         top

       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         top

       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         top

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

STANDARDS         top

       C11, POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, C99.

SEE ALSO         top

       strspn(3), wcscspn(3)

COLOPHON         top

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Linux man-pages 6.10            2024-07-23                      wcsspn(3)

Pages that refer to this page: strspn(3),  wcscspn(3),  signal-safety(7)

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