wcsspn
Section: C Library Functions (3)
Updated: 2022-12-15
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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-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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
wcsspn()
| Thread safety | MT-Safe
|
STANDARDS
POSIX.1-2001, POSIX.1-2008, C99.
SEE ALSO
strspn(3),
wcscspn(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- SEE ALSO
-
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