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WCSTOK(3) FreeBSD 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").
FreeBSD 14.0-RELEASE-p11 October 3, 2002 FreeBSD 14.0-RELEASE-p11