wcstok


SYNOPSIS
       #include <wchar.h>

       wchar_t *wcstok(wchar_t *wcs, const wchar_t *delim, wchar_t **ptr);

DESCRIPTION
       The wcstok() function is the wide-character equivalent of the strtok(3)
       function, 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  reached,  wcstok()
       returns  NULL,  to  indicate  that  no tokens were found, and stores an
       appropriate value in *ptr, so that subsequent calls  to  wcstok()  will
       continue  to  return NULL.  Otherwise, the wcstok() 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  null  wide  character  (L'\0'),  and  it
       updates *ptr so that subsequent calls will continue searching after the
       end of recognized token.

RETURN VALUE
       The wcstok() function returns a pointer to the next token, or  NULL  if
       no further token was found.

CONFORMING TO
       C99.

NOTES
       The original wcs wide-character string is destructively modified during
       the operation.

EXAMPLE
       The following code loops over the tokens contained in a  wide-character
       string.

       wchar_t *wcs = ...;
       wchar_t *token;
       wchar_t *state;
       for (token = wcstok(wcs, " \t\n", &state);
           token != NULL;
           token = wcstok(NULL, " \t\n", &state)) {
           ...
       }

SEE ALSO
       strtok(3), wcschr(3)

COLOPHON
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