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From: bombadil@diku.dk (Kristian Nielsen)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: Question About FileInfoBlock Structures
Keywords: FileInfoBlock directories dos amigados
Message-ID: <1991Feb5.095106.14457@odin.diku.dk>
Date: 5 Feb 91 09:51:06 GMT
References: <18a052ee.ARN02d3@aquarium.buffalo.ny.us>
Sender: news@odin.diku.dk (Netnews System)
Organization: Department of Computer Science, U of Copenhagen
Lines: 53

ernie@aquarium.buffalo.ny.us (Ernest J. Gainey III) writes:

>Hello Everyone,

> I'm curious if anyone knows why this little bit of code produces such
> a strange result, from what I can tell, it should do a directory
> listing filename, filesize, and protections...

> Problem is... the fib_Protection field of the FileInfoBlock structure
> is Empty... when I print it as a "%d", i get a 0... all the other fields
> appear to have values... but do a...
>  printf("Protection==%d\n",MyFileInfoBlock->fib_Protection);
> and I get a: Protection==0 ...

>Here, I'll include my little test program, and show ya... and maybe someone
>can figure out whats wrong...

[...]

> for (x=6; x>=0; x--)
> {
>  if (MyFileInfoBlock->fib_Protection && (1<<x))
                                       ^^
                                       ||
In addition to the comment someone made that some bits are inverted, this
line seems to be able to bring troubles also. The problem is, you are using
the logical and '&&', not the bitwise and '&'. So, (1 && 2)==1, while 
(1 & 2)==0, which was what you desired. Guess this is an example of why
these Pascal-folks hate C so much, while us hardened C-folks find it to bee
no prob.. ehh - never mind...

>   {
>    Protection[6-x]=*ProtectionNames[x];
>   }
>    else
>   {
>    Protection[6-x]='-';
>   }
>}

[...]

>Thanks all for your help...


	Kristian

==========================================================================
Kristian Nielsen                          |      ///   Only the AMIGA
Student at DIKU, University of Copenhagen |     ///
(Department of Computer Science)          | \\\///     makes it possible!
Denmark                                   |  \XX/
==========================================================================