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 POSIX.1-2008 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
XBD <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.