1. getc() function and end of file
Hello all,
I'm trying to process a file, an image of a disk, actually. The file is
about 1,450,000 bytes.
Anyway, my program always stops after only reading about 38,400 bytes. It
appears that getc(infile) is returning -1 (a ctrl-Z presumably), causing
the program to quit.
The thing is, its nowhere near the end of the file yet. How can I make
getc(infile) keep going until it really reaches the end of the file? Do I
have to first look at the D_SIZE attribute from the dir() function, then
use a for loop to read all of the data, or is there another way?
Thanks,
Ted Fines
Macalester College
2. Re: getc() function and end of file
Ted Fines wrote:
> I'm trying to process a file, an image of a disk, actually. The file is
> about 1,450,000 bytes.
>
> Anyway, my program always stops after only reading about 38,400 bytes. It
> appears that getc(infile) is returning -1 (a ctrl-Z presumably), causing
> the program to quit.
My guess is that the fle contains a #1A character. This is a Crtl-Z and for
files opened with mode "r", this will cause a premature End-Of-File (EOF) to
be returned.
Try opening the file with mode "rb" instead.
Another approach is to use get_bytes() instead of getc().
------
Derek Parnell
Melbourne, Australia
"To finish a job quickly, go slower."
3. Re: getc() function and end of file
Could you use something like this?
include get.e
include file.e
object junk
integer fn, file_length
sequence seq
seq = {}
fn = open(" file_name " , "r")
junk=seek(fn,-1)
file_length=where(fn)
junk=seek(fn,0)
seq = append(seq, get_bytes(fn, file_length))
Euman
----- Original Message -----
From: "Ted Fines" <fines at macalester.edu>
To: "EUforum" <EUforum at topica.com>
Sent: Friday, April 06, 2001 16:40
Subject: getc() function and end of file
>
>
> Hello all,
>
> I'm trying to process a file, an image of a disk, actually. The file is
> about 1,450,000 bytes.
>
> Anyway, my program always stops after only reading about 38,400 bytes. It
> appears that getc(infile) is returning -1 (a ctrl-Z presumably), causing
> the program to quit.
>
> The thing is, its nowhere near the end of the file yet. How can I make
> getc(infile) keep going until it really reaches the end of the file? Do I
> have to first look at the D_SIZE attribute from the dir() function, then
> use a for loop to read all of the data, or is there another way?
>
> Thanks,
> Ted Fines
> Macalester College
>
>
>
>
>
>
4. Re: getc() function and end of file
Ted Fines wrote:
>Anyway, my program always stops after only reading about 38,400 bytes. It
>appears that getc(infile) is returning -1 (a ctrl-Z presumably), causing
>the program to quit.
Did you open it in binary mode? If not, that could be your problem.
-- David Cuny
