Path: utzoo!attcan!uunet!samsung!emory!mephisto!psuvax1!rutgers!umn-d-ub!cs.umn.edu!thelake!steve
From: steve@thelake.mn.org (Steve Yelvington)
Newsgroups: comp.sys.atari.st
Subject: Re: DA's and Curses
Summary: What's that egg doing on my face? Here's a correction.
Keywords: DA, desk accessory, Sozobon
Message-ID: <A1248990348@thelake.mn.org>
Date: 12 Apr 90 14:19:36 GMT
References: <2225@ariel.unm.edu> <A1555240072@thelake.mn.org> 
        <16567@eagle.wesleyan.edu>
Lines: 71


In <16567@eagle.wesleyan.edu>, ncastellano@eagle.wesleyan.edu writes:

>In article <A1555240072@thelake.mn.org>, 
> steve@thelake.mn.org (Steve Yelvington) writes:
>>      char path[128], defult[13] = '\0';
>
>My version of Sozobon C would not compile this unless I changed 'char' to
>'static char'.  This agrees with what I know about string initialization in C, 
>which is that you can only initialize char strings if they are extern or 
>static.  

Right. I slopped the code together in a hurry and posted it (a year ago!) 
without testing it. And sure enough, it was hosed up. Arggh! I hate it 
when that happens. It's pretty hard to make an excuse when you repost a 
year-old mistake.

At least this time somebody actually tried to compile it. :-)

>Even after getting it to compile, the desk accessory didn't seem to do 
>anything; it merely exited to the desktop.  Any idea what I might be doing 
>wrong?  I ld'd the libraries in the order suggested (dastart.o, accskel.o,
>aesfast.a, vdifast.a, dlibs.a)  Any help would be appreciated.

You didn't do anything wrong. I typed in a couple of things from bad 
documentation -- the description of AES messages on page 516 of "Atari ST 
Application Programming" by Pollack and Weber. The lesson here is twofold:
One, don't post untested code, and two, NEVER believe any documentation about
the ST* until you have checked it out three ways.

(* Same could be said for anything read on Usenet.)

AC_OPEN is 40, not 30. And the DA's apid should be found in msgbuf[4], 
not msgbuf[3].

Corrected code follows.

#define MENU_ID    " File selector "
#define AC_OPEN    40

#ifndef GEMFAST
int    contrl[12], intin[128], intout[128], ptsin[128], ptsout[128];
#endif

main()
    {
    int apid, menuid, msgbuf[8];
    apid = appl_init();                       /* say hello to the AES */
    menuid = menu_register(apid, MENU_ID);    /* add me to the Desk menu */
    while (1)                                 /* loop forever */
        {
        evnt_mesag(msgbuf);
        if ( (msgbuf[0] == AC_OPEN) && (msgbuf[4] == menuid) )
            wakeup();
        }
    appl_exit();    /* you'll never get here -- supposedly */
    }

wakeup()     /* Whatever needs to be done. Here we display the fsel ... */
     {
     char path[128], defult[13];
     defult[0] = '\0';
     int button;
     fullpath(path,"*.*");
     fsel_input(path,defult,&button);
     }


-- 
   Steve Yelvington at the lake in Minnesota
   steve@thelake.mn.org