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WCSTOK(3)             DragonFly Library Functions Manual             WCSTOK(3)


NAME

     wcstok -- split wide-character string into tokens


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <wchar.h>

     wchar_t *
     wcstok(wchar_t * restrict str, const wchar_t * restrict sep,
         wchar_t ** restrict last);


DESCRIPTION

     The wcstok() function is used to isolate sequential tokens in a null-
     terminated wide character string, str.  These tokens are separated in the
     string by at least one of the characters in sep.  The first time that
     wcstok() is called, str should be specified; subsequent calls, wishing to
     obtain further tokens from the same string, should pass a null pointer
     instead.  The separator string, sep, must be supplied each time, and may
     change between calls.  The context pointer last must be provided on each
     call.

     The wcstok() function is the wide character counterpart of the strtok_r()
     function.


RETURN VALUES

     The wcstok() function returns a pointer to the beginning of each
     subsequent token in the string, after replacing the token itself with a
     null wide character (L'\0').  When no more tokens remain, a null pointer
     is returned.


EXAMPLES

     The following code fragment splits a wide character string on ASCII
     space, tab and newline characters and writes the tokens to standard
     output:

           const wchar_t *seps = L" \t\n";
           wchar_t *last, *tok, text[] = L" \none\ttwo\t\tthree  \n";

           for (tok = wcstok(text, seps, &last); tok != NULL;
               tok = wcstok(NULL, seps, &last))
                   wprintf(L"%ls\n", tok);


COMPATIBILITY

     Some early implementations of wcstok() omit the context pointer argument,
     last, and maintain state across calls in a static variable like strtok()
     does.


SEE ALSO

     strtok(3), wcschr(3), wcscspn(3), wcspbrk(3), wcsrchr(3), wcsspn(3)


STANDARDS

     The wcstok() function conforms to ISO/IEC 9899:1999 (``ISO C99'').

DragonFly 3.5                   October 3, 2002                  DragonFly 3.5

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