170 lines
4 KiB
C
170 lines
4 KiB
C
/*
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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, 1993
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* The Regents of the University of California. All rights reserved.
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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 copyright
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* notices, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* 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 the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SOFTWEYR LLC, THE
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* REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD: src/lib/libc/string/strtok.c,v 1.2.6.1 2001/07/09 23:30:07 obrien Exp $";
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#endif
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#include <stddef.h>
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#include <string.h>
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char *
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strtok_r(char *s, const char *delim, char **last)
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{
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char *spanp;
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int c, sc;
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char *tok;
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if (s == NULL && (s = *last) == NULL)
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{
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return NULL;
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}
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/*
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* Skip (span) leading delimiters (s += strspn(s, delim), sort of).
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*/
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cont:
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c = *s++;
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for (spanp = (char *)delim; (sc = *spanp++) != 0; )
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{
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if (c == sc)
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{
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goto cont;
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}
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}
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if (c == 0) /* no non-delimiter characters */
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{
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*last = NULL;
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return NULL;
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}
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tok = s - 1;
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/*
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* Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
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* Note that delim must have one NUL; we stop if we see that, too.
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*/
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for (;;)
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{
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c = *s++;
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spanp = (char *)delim;
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do
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{
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if ((sc = *spanp++) == c)
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{
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if (c == 0)
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{
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s = NULL;
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}
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else
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{
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char *w = s - 1;
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*w = '\0';
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}
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*last = s;
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return tok;
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}
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}
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while (sc != 0);
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}
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/* NOTREACHED */
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}
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#if 0
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char *
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strtok(char *s, const char *delim)
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{
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static char *last;
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return strtok_r(s, delim, &last);
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}
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#endif
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#if defined(DEBUG_STRTOK)
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/*
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* Test the tokenizer.
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*/
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int
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main()
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{
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char test[80], blah[80];
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char *sep = "\\/:;=-";
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char *word, *phrase, *brkt, *brkb;
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printf("String tokenizer test:\n");
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strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
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for (word = strtok(test, sep);
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word;
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word = strtok(NULL, sep))
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{
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printf("Next word is \"%s\".\n", word);
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}
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phrase = "foo";
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strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");
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for (word = strtok_r(test, sep, &brkt);
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word;
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word = strtok_r(NULL, sep, &brkt))
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{
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strcpy(blah, "blah:blat:blab:blag");
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for (phrase = strtok_r(blah, sep, &brkb);
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phrase;
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phrase = strtok_r(NULL, sep, &brkb))
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{
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printf("So far we're at %s:%s\n", word, phrase);
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}
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}
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return 0;
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}
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#endif /* DEBUG_STRTOK */
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