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From: david@jpl-devvax.JPL.NASA.GOV (David E. Smyth)
Newsgroups: comp.windows.x.motif
Subject: Re:  Widget Creation Library version 1.03 Now Available
Message-ID: <9057@jpl-devvax.JPL.NASA.GOV>
Date: 8 Aug 90 00:08:38 GMT
References: <1990Aug6.140420@nontech.ctt.bellcore.com>
Reply-To: david@jpl-devvax.JPL.NASA.GOV (David E. Smyth)
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 52

guy@auspex.auspex.com (Guy Harris) writes:
>david@jpl-devvax.JPL.NASA.GOV (David E. Smyth) writes:
> >    if ( strstr( res_type, "Widget")
> >#ifdef MOTIF
> >        || strstr( res_type, "Window")  /* wrong: but that's a menuWidget */
> >#endif
> >        )
> >
> >You can change the `strstr' to `strtok' and everything will work fine.
>
>If that's true, it's sure a lucky coincidence, as "strstr()" and
>"strtok()" don't do anything very much related....
>
>An N*M-time implementation of "strstr()" isn't that hard to do.

OK, OK, OK!  You are right, I was just lucky in my 10 second test...
strtok and strstr are rather different.  Here is a quick implementation
of strstr which seems to work.  I did not copy anybody elses, so you
don't have to worry about copyleft or copyright or whatever.  Please,
please, please, use an ANSI C compiler (e.g., gcc) if you can.  I
don't want to start supporting an ANSI C library!!!!!!!

For you hapless people out there who get "_strstr undefined" errors
when compiling WcCallb.c in Wcl version 1.03, just compile this and
include it on the load line:

/* copyright David E. Smyth 1990 */

char* strstr( s1, s2 )
    char* s1;
    char* s2;
{
    while (*s1)
    {
        if (*s1 == *s2)
        {
            char* start = s1;
            char* c = s2;
            while (*++s1 & *++c && *s1 == *c)
                ;
            if (*c == '\0')
                return start;
            else
                s1 = ++start;
        }
        else
        {
            s1++ ;
        }
    }
    return (char*)0;
}