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/*        $NetBSD: strtok_r.c,v 1.9 2003/08/07 16:43:53 agc Exp $        */
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/*
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 * Copyright (c) 1988 Regents of the University of California.
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 * 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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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, 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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 * 3. 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 THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT 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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#include <sys/cdefs.h>
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#include <string.h>
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char *
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strtok_r(s, delim, lasts)
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        char *s;
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        const char *delim;
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        char **lasts;
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{
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        const char *spanp;
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        int c, sc;
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        char *tok;
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        if (s == NULL && (s = *lasts) == NULL)
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                return (NULL);
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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 = delim; (sc = *spanp++) != 0;) {
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                if (c == sc)
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                        goto cont;
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        }
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        if (c == 0) {                /* no non-delimiter characters */
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                *lasts = 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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                c = *s++;
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                spanp = delim;
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                do {
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                        if ((sc = *spanp++) == c) {
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                                if (c == 0)
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                                        s = NULL;
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                                else
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                                        s[-1] = 0;
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                                *lasts = s;
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                                return (tok);
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                        }
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                } while (sc != 0);
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        }
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        /* NOTREACHED */
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}