wcscspn - search a wide-character string for any of a set of wide characters
#include <wchar.h>
size_t wcscspn(const wchar_t *wcs, const wchar_t *reject);The wcscspn() function is the wide-character equivalent of the strcspn(3) function. It determines the length of the longest initial segment of wcs which consists entirely of wide-characters not listed in reject. In other words, it searches for the first occurrence in the wide-character string wcs of any of the characters in the wide-character string reject.
The wcscspn() function returns the number of wide characters in the longest initial segment of wcs which consists entirely of wide-characters not listed in reject. In other words, it returns the position of the first occurrence in the wide-character string wcs of any of the characters in the wide-character string reject, or wcslen(wcs) if there is none.
For an explanation of the terms used in this section, see attributes(7).
| Interface | Attribute | Value |
| wcscspn() | Thread safety | MT-Safe |
POSIX.1-2001, POSIX.1-2008, C99.
strcspn(3), wcspbrk(3), wcsspn(3)
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