usr/src/lib/libc/compat-sys5/strtok.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

/*
 * Sys5 compat routine
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)strtok.c    5.2 (Berkeley) 86/03/09";
#endif

char *
strtok(s, sep)
        register char *s, *sep;
{
        register char *p;
        register c;
        static char *lasts;

        if (s == 0)
                s = lasts;
        if (s == 0)
                return (0);

        while (c = *s) {
                if (!index(sep, c))
                        break;
                s++;
        }

        if (c == '\0') {
                lasts = 0;
                return (0);
        }

        for (p = s; c = *++p; )
                if (index(sep, c))
                        break;

        if (c == '\0')
                lasts = 0;
        else {
                *p++ = '\0';
                lasts = p;
        }
        return (s);
}