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.\" Copyright (c) 1998 Softweyr LLC. All rights reserved.
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.\"
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.\" strtok_r, from Berkeley strtok
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.\" Oct 13, 1998 by Wes Peters <wes@softweyr.com>
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.\"
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.\" Copyright (c) 1988, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" the American National Standards Committee X3, on Information
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.\" Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\"
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notices, this list of conditions and the following disclaimer.
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.\"
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.\" 2. Redistributions in binary form must reproduce the above
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.\" copyright notices, this list of conditions and the following
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.\" disclaimer in the documentation and/or other materials provided
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.\" with the distribution.
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.\"
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.\" 3. All advertising materials mentioning features or use of this
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.\" software must display the following acknowledgement:
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.\"
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.\" This product includes software developed by Softweyr LLC, the
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.\" University of California, Berkeley, and its contributors.
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.\"
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.\" 4. Neither the name of Softweyr LLC, the University nor the names
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.\" of its contributors may be used to endorse or promote products
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.\" derived from this software without specific prior written
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.\" permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND
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.\" CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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.\" DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE REGENTS, OR
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.\" CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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.\" LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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.\" ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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2002-10-02 14:28:26 +00:00
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.Dd October 3, 2002
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2002-09-07 08:16:57 +00:00
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.Dt WCSTOK 3
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.Os
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.Sh NAME
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.Nm wcstok
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.Nd split wide-character string into tokens
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In wchar.h
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.Ft wchar_t *
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.Fn wcstok "wchar_t * restrict str" "const wchar_t * restrict sep" "wchar_t ** restrict last"
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.Sh DESCRIPTION
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The
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.Fn wcstok
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function
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is used to isolate sequential tokens in a null-terminated wide character
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string,
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.Fa str .
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These tokens are separated in the string by at least one of the
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characters in
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.Fa sep .
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The first time that
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2002-09-08 11:09:24 +00:00
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.Fn wcstok
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is called,
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.Fa str
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should be specified; subsequent calls, wishing to obtain further tokens
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from the same string, should pass a null pointer instead.
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The separator string,
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.Fa sep ,
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must be supplied each time, and may change between calls.
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The context pointer
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.Fa last
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must be provided on each call.
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.Pp
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The
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.Fn wcstok
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function is the wide character counterpart of the
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.Fn strtok_r
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function.
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.Sh RETURN VALUES
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The
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.Fn wcstok
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function
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returns a pointer to the beginning of each subsequent token in the string,
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after replacing the token itself with a null wide character (L'\e0').
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When no more tokens remain, a null pointer is returned.
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.Sh EXAMPLES
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The following code fragment splits a wide character string on
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.Tn ASCII
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space, tab and newline characters and writes the tokens to
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standard output:
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.Bd -literal -offset indent
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const wchar_t *seps = L" \et\en";
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wchar_t *last, *tok, text[] = L" \enone\ettwo\et\etthree \en";
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for (tok = wcstok(text, seps, &last); tok != NULL;
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tok = wcstok(NULL, seps, &last))
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wprintf(L"%ls\en", tok);
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.Ed
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2002-09-07 08:16:57 +00:00
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.Sh COMPATIBILITY
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Some early implementations of
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.Fn wcstok
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omit the
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context pointer argument,
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.Fa last ,
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and maintain state across calls in a static variable like
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.Fn strtok
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does.
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.Sh SEE ALSO
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2002-10-02 14:28:26 +00:00
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.Xr strtok 3 ,
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.Xr wcschr 3 ,
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.Xr wcscspn 3 ,
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.Xr wcspbrk 3 ,
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.Xr wcsrchr 3 ,
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2002-10-15 09:49:54 +00:00
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.Xr wcsspn 3
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.Sh STANDARDS
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The
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.Fn wcstok
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function
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conforms to
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.St -isoC-99 .
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