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 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(), the Base Definitions volume of IEEE Std 1003.1-2001, <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.