NAME
wcsspn — get the
length of a wide substring
SYNOPSIS
#include
<wchar.h>
size_t wcsspn(const wchar_t *ws1, const wchar_t *ws2);
DESCRIPTION
[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.
The wcsspn () function shall
compute the length (in wide characters) of the maximum initial segment of
the wide-character string pointed to by ws1 which consists
entirely of wide-character codes from the wide-character string pointed to
by ws2.
RETURN VALUE
The wcsspn () function shall return the
length of the initial substring of ws1; no return value is
reserved to indicate an error.
ERRORS
No errors are defined.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
wcscspn(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <wchar.h>
CHANGE HISTORY
First released in Issue 4. Derived from the MSE working draft.
Issue 5
The RETURN VALUE section is updated to indicate that
wcsspn () returns the length of
ws1 rather that ws1 itself.
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