Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!glyph!ahh
From: ahh@glyph.UUCP (Andy Heffernan)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Manx SDB bug (second try)
Message-ID: <505@glyph.UUCP>
Date: 8 Mar 90 04:12:27 GMT
References: <16480@well.sf.ca.us> <34700001@suna8>
Reply-To: ahh@glyph.UUCP (Andy Heffernan)
Organization: Cinnamon Toast Crunch Research Labs
Lines: 31

In article <34700001@suna8> martin@suna8.cs.uiuc.edu writes:
[...]
>
>P.S.  I found what appears to be a bug in Rob Peck's book "Programmer's
>      Guide to the Amiga".  On page 17, he has a sample program that opens
>      the console and writes 'hello world' using a FileHandle, and fprintf().
>      Naively, I tried it and got a requester.  Intuitively, it shouldn't 
>      work anyway, since fprintf() needs a (FILE *), and the pointer is a
>      (FileHandle *).  Anyway, just thought you'd like to know...

I don't have Rob's book, but it sounds like he's using the fprintf()
from amiga.lib (not lc.lib) which understands AmigaDOS file handles.
Try linking with just amiga.lib, omitting whatever c-lib comes with
your compiler.

With Lattice version 5, something like this seems to work for me:
1> lc -v -b0 hello.c
1> blink lib:astartup.obj,hello.o to hello lib lib:amiga.lib

Of course, Open() returns a BPTR to a struct FileHandle, not a machine
pointer, so using it as or casting to a struct FileHandle is somewhat pointless 
without BADDR()'ing the returned value from Open() and only if you really 
want to goop around with FileHandle internals.

But what do I know.


-- 
-------------------------------------------------------------------------
  Andy Heffernan					uunet!glyph!ahh
"In a daze, Buck clutched at his head.  'Oh, how manly I feel,' he moaned."