wcstok - split wide-character string into tokens


   #include <wchar.h>

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


   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

   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.


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


   For   an   explanation   of   the  terms  used  in  this  section,  see

   Interface  Attribute      Value   
   wcstok()   Thread safety  MT-Safe 


   POSIX.1-2001, POSIX.1-2008, C99.


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


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

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


   strtok(3), wcschr(3)


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