Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!julius.cs.uiuc.edu!news.cs.indiana.edu!msi.umn.edu!noc.MR.NET!gacvx2.gac.edu!hhdist
From: postmaster.DUNG_BEETLE@gateway.qm.apple.com (postmaster)
Newsgroups: comp.sys.handhelds
Subject: Steve Winters :Unknown QM u
Message-ID: <9101040921.AA21214@internal.apple.com>
Date: 4 Jan 91 09:23:58 GMT
Lines: 87
To: handhelds@gac.edu
Return-path: <postmaster.DUNG_BEETLE@gateway.qm.apple.com>
To: handhelds@gac.edu

Mail*Link#170#                    Steve Winters :Unknown QM u
Received: by gateway.qm.apple.com; 4 Jan 91 01:23:56
Received: from apple.com ([130.43.2.2]) by goofy.apple.com with SMTP
(5.61/25-eef)
	id AA16891; Fri, 4 Jan 91 00:32:43 -0800
	for winters
Received: from gacvx2.gac.edu by apple.com with SMTP (5.61/25-eef)
	id AA19251; Sun, 23 Dec 90 11:36:32 -0800
	for Steve_Winters.PERIPH_PROJ@gateway.qm.apple.com
Date: Sun, 23 Dec 1990 13:30 CST
From: handhelds@gac.edu
Subject: Re: SAD compilation problems....
Sender: NEWSMGR@gacvx2.gac.edu
To: HANDHELDS@gacvx2.gac.edu
Errors-To: postmaster@gac.edu
Reply-To: handhelds@gac.edu
Message-Id: <E2D81D9DE00004B1@gacvx2.gac.edu>
X-Vms-To: IN%"HANDHELDS@GACVX2.GAC.EDU"
Comments: Forwarded from COMP.SYS.HANDHELDS by GACVX2.GAC.EDU

Relay-Version: VMS News - V6.0-1 14/11/90 VAX/VMS V5.4; site gacvx2.gac.edu
Path:
gacvx2.gac.edu!noc.MR.NET!uc!tut.cis.ohio-state.edu!snorkelwacker.mit.edu!ai-lab!rice-chex!bson
Newsgroups: comp.sys.handhelds
Subject: Re: SAD compilation problems....
Message-ID: <12523@life.ai.mit.edu>
From: bson@rice-chex.ai.mit.edu (Jan Brittenson)
Date: 23 Dec 90 18:36:48 GMT
Sender: news@ai.mit.edu
References: <1990Dec22.180316.647@zip.eecs.umich.edu>
Organization: nil
Lines: 55

In article <1990Dec22.180316.647@zip.eecs.umich.edu> 
   kamidon@zip.eecs.umich.edu (Keith Amidon) writes:

   When porting SAD, make sure that integers are 32 bits or more
(shouldn't pose any problems on 68k machines) and that all data types
and pointers (except double) are passed on the stack as 32-bit
quantities.


 > ... the one problem I have run into is that SAD expects there to be a
 > library function called qsort, which doesn't seem to exist in DICE's
 > libraries.

From the SunOS man(1) page:

   SYNOPSIS
        qsort(base, nel, width, compar)
        char *base;
        int (*compar)();
   
   DESCRIPTION
        qsort() is an implementation of the quicker-sort  algorithm.
        It sorts a table of data in place.
   
        base points to the element at the base of the table.  nel is
        the  number of elements in the table.  width is the size, in
        bytes, of each element in the table.  compar is the name  of
        the  comparison function, which is called with two arguments
        that point to the elements being compared.  As the  function
        must  return an integer less than, equal to, or greater than
        zero, so must the first argument to be  considered  be  less
        than, equal to, or greater than the second.


   Note that the description is confusing; compar is not the name
(implying name in ascii) of the comparison function, but rather a
pointer to it, i.e. (int (*)()) as defined in the synopsis above.

I mention this because I've seen attempts to do things like:

  /* WRONG */  qsort(..., "my_cmp");  /* WRONG */

(Usually by students, but worth mentioning nevertheless.)


 > [Where can I] find sources for a routine doing the same thing which I
 > could link into the SAD programs?

   Check with project GNU's C Standard Library at FTP address
prep.ai.mit.edu. qsort should be fairly self-contained and not require
much else from the library - send me mail if you need help with
this.

						-- Jan Brittenson
						   bson@ai.mit.edu