.\" Copyright (c) 1998 Softweyr LLC. All rights reserved. .\" .\" strtok_r, from Berkeley strtok .\" Oct 13, 1998 by Wes Peters <email@example.com> .\" .\" Copyright (c) 1988, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" This code is derived from software contributed to Berkeley by .\" the American National Standards Committee X3, on Information .\" Processing Systems. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" .\" 1. Redistributions of source code must retain the above copyright .\" notices, this list of conditions and the following disclaimer. .\" .\" 2. Redistributions in binary form must reproduce the above .\" copyright notices, this list of conditions and the following .\" disclaimer in the documentation and/or other materials provided .\" with the distribution. .\" .\" 3. All advertising materials mentioning features or use of this .\" software must display the following acknowledgement: .\" .\" This product includes software developed by Softweyr LLC, the .\" University of California, Berkeley, and its contributors. .\" .\" 4. Neither the name of Softweyr LLC, the University nor the names .\" of its contributors may be used to endorse or promote products .\" derived from this software without specific prior written .\" permission. .\" .\" THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND .\" CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, .\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF .\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE .\" DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE REGENTS, OR .\" CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, .\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT .\" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF .\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND .\" ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, .\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT .\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" $FreeBSD: src/lib/libc/string/wcstok.3,v 1.4 2002/10/15 09:49:54 tjr Exp $ .\" .Dd October 3, 2002 .Dt WCSTOK 3 .Os .Sh NAME .Nm wcstok .Nd split wide-character string into tokens .Sh LIBRARY .Lb libc .Sh SYNOPSIS .In wchar.h .Ft wchar_t * .Fo wcstok .Fa "wchar_t *restrict ws1" .Fa "const wchar_t *restrict ws2" .Fa "wchar_t **restrict ptr" .Fc .Sh DESCRIPTION The .Fn wcstok function is used to isolate sequential tokens in a null-terminated wide character string, .Fa ws1 . These tokens are separated in the string by at least one of the characters in .Fa ws2 . The first time that .Fn wcstok is called, .Fa ws1 should be specified; subsequent calls, wishing to obtain further tokens from the same string, should pass a null pointer instead. The separator string, .Fa ws2 , must be supplied each time, and may change between calls. The context pointer, .Fa ptr , must be provided on each call. .Pp The .Fn wcstok function is the wide character counterpart of the .Fn strtok_r function. .Sh RETURN VALUES The .Fn 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'\e0'). When no more tokens remain, a null pointer is returned. .Sh EXAMPLES The following code fragment splits a wide character string on .Tn ASCII space, tab, and newline characters, writing the resulting tokens to standard output: .Bd -literal -offset indent const wchar_t *seps = L" \et\en"; wchar_t *last, *tok, text = L" \enone\ettwo\et\etthree \en"; for (tok = wcstok(text, seps, &last); tok != NULL; tok = wcstok(NULL, seps, &last)) wprintf(L"%ls\en", tok); .Ed .Sh COMPATIBILITY Some early implementations of .Fn wcstok omit the context pointer argument, .Fa ptr , and maintain state across calls in a static variable like .Fn strtok does. .Sh SEE ALSO .Xr strtok 3 , .Xr wcschr 3 , .Xr wcscspn 3 , .Xr wcspbrk 3 , .Xr wcsrchr 3 , .Xr wcsspn 3 .Sh STANDARDS The .Fn wcstok function conforms to .St -isoC-99 .