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Annotation of prex-old/usr/lib/libc/string/strtok_r.c, Revision 1.1

1.1     ! nbrk        1: /*     $NetBSD: strtok_r.c,v 1.9 2003/08/07 16:43:53 agc Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1988 Regents of the University of California.
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. Neither the name of the University nor the names of its contributors
        !            16:  *    may be used to endorse or promote products derived from this software
        !            17:  *    without specific prior written permission.
        !            18:  *
        !            19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            29:  * SUCH DAMAGE.
        !            30:  */
        !            31:
        !            32: #include <sys/cdefs.h>
        !            33: #include <string.h>
        !            34:
        !            35: char *
        !            36: strtok_r(s, delim, lasts)
        !            37:        char *s;
        !            38:        const char *delim;
        !            39:        char **lasts;
        !            40: {
        !            41:        const char *spanp;
        !            42:        int c, sc;
        !            43:        char *tok;
        !            44:
        !            45:        if (s == NULL && (s = *lasts) == NULL)
        !            46:                return (NULL);
        !            47:
        !            48:        /*
        !            49:         * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
        !            50:         */
        !            51: cont:
        !            52:        c = *s++;
        !            53:        for (spanp = delim; (sc = *spanp++) != 0;) {
        !            54:                if (c == sc)
        !            55:                        goto cont;
        !            56:        }
        !            57:
        !            58:        if (c == 0) {           /* no non-delimiter characters */
        !            59:                *lasts = NULL;
        !            60:                return (NULL);
        !            61:        }
        !            62:        tok = s - 1;
        !            63:
        !            64:        /*
        !            65:         * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
        !            66:         * Note that delim must have one NUL; we stop if we see that, too.
        !            67:         */
        !            68:        for (;;) {
        !            69:                c = *s++;
        !            70:                spanp = delim;
        !            71:                do {
        !            72:                        if ((sc = *spanp++) == c) {
        !            73:                                if (c == 0)
        !            74:                                        s = NULL;
        !            75:                                else
        !            76:                                        s[-1] = 0;
        !            77:                                *lasts = s;
        !            78:                                return (tok);
        !            79:                        }
        !            80:                } while (sc != 0);
        !            81:        }
        !            82:        /* NOTREACHED */
        !            83: }