source: trunk/minix/lib/ansi/strtok.c@ 15

/*
 * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
 * See the copyright notice in the ACK home directory, in the file "Copyright".
 */
/* $Header: /cvsup/minix/src/lib/ansi/strtok.c,v 1.1.1.1 2005/04/21 14:56:06 beng Exp $ */

#include        <string.h>

char *
strtok(register char *string, const char *separators)
{
        register char *s1, *s2;
        static char *savestring;

        if (string == NULL) {
                string = savestring;
                if (string == NULL) return (char *)NULL;
        }

        s1 = string + strspn(string, separators);
        if (*s1 == '\0') {
                savestring = NULL;
                return (char *)NULL;
        }

        s2 = strpbrk(s1, separators);
        if (s2 != NULL)
                *s2++ = '\0';
        savestring = s2;
        return s1;
}