--- Libc/Libc-262/string/strtok.3
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-.\" Copyright (c) 1998 Softweyr LLC.  All rights reserved.
-.\"
-.\" strtok_r, from Berkeley strtok
-.\" Oct 13, 1998 by Wes Peters <wes@softweyr.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.
-.\"
-.\"     @(#)strtok.3	8.2 (Berkeley) 2/3/94
-.\" $FreeBSD: src/lib/libc/string/strtok.3,v 1.22 2001/10/01 16:09:00 ru Exp $
-.\"
-.Dd November 27, 1998
-.Dt STRTOK 3
-.Os
-.Sh NAME
-.Nm strtok , strtok_r
-.Nd string tokens
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In string.h
-.Ft char *
-.Fn strtok "char *str" "const char *sep"
-.Ft char *
-.Fn strtok_r "char *str" "const char *sep" "char **last"
-.Sh DESCRIPTION
-.Bf -symbolic
-This interface is obsoleted by
-.Xr strsep 3 .
-.Ef
-.Pp
-The
-.Fn strtok
-function
-is used to isolate sequential tokens in a null-terminated string,
-.Fa str .
-These tokens are separated in the string by at least one of the
-characters in
-.Fa sep .
-The first time that
-.Fn strtok
-is called,
-.Fa str
-should be specified; subsequent calls, wishing to obtain further tokens
-from the same string, should pass a null pointer instead.
-The separator string,
-.Fa sep ,
-must be supplied each time, and may change between calls.
-.Pp
-The implementation will behave as if no library function calls
-.Fn strtok .
-.Pp
-The
-.Fn strtok_r
-function is a reentrant version of
-.Fn strtok .
-The context pointer
-.Fa last
-must be provided on each call.
-.Fn strtok_r
-may also be used to nest two parsing loops within one another, as
-long as separate context pointers are used.
-.Pp
-The
-.Fn strtok
-and
-.Fn strtok_r
-functions
-return a pointer to the beginning of each subsequent token in the string,
-after replacing the token itself with a
-.Dv NUL
-character.
-When no more tokens remain, a null pointer is returned.
-.Sh EXAMPLES
-The following uses
-.Fn strtok_r
-to parse two strings using separate contexts:
-.Bd -literal
-char test[80], blah[80];
-char *sep = "\e\e/:;=-";
-char *word, *phrase, *brkt, *brkb;
-
-strcpy(test, "This;is.a:test:of=the/string\e\etokenizer-function.");
-
-for (word = strtok_r(test, sep, &brkt);
-     word;
-     word = strtok_r(NULL, sep, &brkt))
-{
-    strcpy(blah, "blah:blat:blab:blag");
-
-    for (phrase = strtok_r(blah, sep, &brkb);
-         phrase;
-         phrase = strtok_r(NULL, sep, &brkb))
-    {
-        printf("So far we're at %s:%s\en", word, phrase);
-    }
-}
-.Ed
-.Sh SEE ALSO
-.Xr memchr 3 ,
-.Xr strchr 3 ,
-.Xr strcspn 3 ,
-.Xr strpbrk 3 ,
-.Xr strrchr 3 ,
-.Xr strsep 3 ,
-.Xr strspn 3 ,
-.Xr strstr 3
-.Sh STANDARDS
-The
-.Fn strtok
-function
-conforms to
-.St -isoC .
-.Sh BUGS
-The System V
-.Fn strtok ,
-if handed a string containing only delimiter characters,
-will not alter the next starting point, so that a call to
-.Fn strtok
-with a different (or empty) delimiter string
-may return a
-.Pf non- Dv NULL
-value.
-Since this implementation always alters the next starting point,
-such a sequence of calls would always return
-.Dv NULL .
-.Sh AUTHORS
-.An Wes Peters ,
-Softweyr LLC:
-.Aq wes@softweyr.com
-.Pp
-Based on the
-.Fx 3.0
-implementation.