/* @(#)root/clib:$Name:  $:$Id: strtok.c,v 1.1.1.1 2000/05/16 17:00:43 rdm Exp $ */
/* Author: */

#if defined(WIN32) && defined(SYMANTEC)

/* This is file STRTOK.C */
/* This file may have been modified by DJ Delorie (Jan 1991).  If so,
** these modifications are Coyright (C) 1993 DJ Delorie, 24 Kirsten Ave,
** Rochester NH, 03867-2954, USA.
*/

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strtok.c    5.7 (Berkeley) 6/1/90";
#endif /* LIBC_SCCS and not lint */

#include <stddef.h>
#include <string.h>

char *
strtok(s, delim)
        register char *s;
        register const char *delim;
{
        register const char *spanp;
        register int c, sc;
        char *tok;
        static char *last;


        if (s == NULL && (s = last) == NULL)
                return (NULL);

        /*
         * Skip (span) leading delimiters (s += strspn(s, delim), sort of).
         */
cont:
        c = *s++;
        for (spanp = delim; (sc = *spanp++) != 0;) {
                if (c == sc)
                        goto cont;
        }

        if (c == 0) {           /* no non-delimiter characters */
                last = NULL;
                return (NULL);
        }
        tok = s - 1;

        /*
         * Scan token (scan for delimiters: s += strcspn(s, delim), sort of).
         * Note that delim must have one NUL; we stop if we see that, too.
         */
        for (;;) {
                c = *s++;
                spanp = delim;
                do {
                        if ((sc = *spanp++) == c) {
                                if (c == 0)
                                        s = NULL;
                                else
                                        s[-1] = 0;
                                last = s;
                                return (tok);
                        }
                } while (sc != 0);
        }
        /* NOTREACHED */
}
#else

#ifndef __GNUC__
/* Prevent "empty translation unit" warnings. */
static char file_intentionally_empty = 69;
#endif

#endif
