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-charac- ters 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 at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │wcsspn() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008, C99. SEE ALSO strspn(3), wcscspn(3) Linux man-pages 6.03 2022-12-15 wcsspn(3)
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