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wcstok(3)


NAME

   wcstok - split wide-character string into tokens

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.

ATTRIBUTES

   For   an   explanation   of   the  terms  used  in  this  section,  see
   attributes(7).

   
   Interface  Attribute      Value   
   
   wcstok()   Thread safety  MT-Safe

CONFORMING TO

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

   This page is part of release 4.09 of the Linux  man-pages  project.   A
   description  of  the project, information about reporting bugs, and the
   latest    version    of    this    page,    can     be     found     at
   https://www.kernel.org/doc/man-pages/.



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