function is the wide-character equivalent of the
with an added argument to make it multithread-safe.
It can be used
to split a wide-character string wcs into tokens, where a token is
defined as a substring not containing any wide-characters from delim.
The search starts at wcs, if wcs is not NULL,
or at *ptr, if wcs is NULL.
First, any delimiter wide-characters are skipped, that is, the
pointer is advanced beyond any wide-characters which occur in delim.
If the end of the wide-character string is now
returns NULL, to indicate that no tokens
were found, and stores an appropriate value in *ptr,
so that subsequent calls to
will continue to return NULL.
function recognizes the beginning of a token
and returns a pointer to it, but before doing that, it zero-terminates the
token by replacing the next wide-character which occurs in delim with
a L'\0' character,
and it updates *ptr so that subsequent calls will
continue searching after the end of recognized token.
function returns a pointer to the next token,
or NULL if no further token was found.
The original wcs wide-character string is destructively modified during
The following code loops over the tokens contained in a wide-character string.