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WCSSPN(3) Linux Programmer's Manual WCSSPN(3)

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.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
wcsspn () Thread safety MT-Safe

POSIX.1-2001, POSIX.1-2008, C99.

strspn(3), wcscspn(3)

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2015-08-08 GNU