WCSSPN(3) manual page
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wcsspn - advance in a wide-character string, skipping
any of a set of wide characters
#include <wchar.h>
size_t wcsspn(const wchar_t *wcs, const wchar_t *accept);
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.
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.
The
wcsspn() function is thread-safe.
C99.
strspn(3)
, wcscspn(3)
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