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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