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.
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