From: Robert Klemme <shortcutter@...>
Date: 2007-12-21T21:37:58+09:00
Subject: Re: Binary file reading in Ruby

2007/12/21, rohit2000s@yahoo.com <rohit2000s@yahoo.com>:
> Hi All,
>
> I am trying to read in a binary file of size 'n' using:
>
> mem_buf = IO.read(file_name, n, 0)
>
> Where file_name is an argument to the script.
>
> But after the read I observed that the size of the mem_buf is less
> than 'n' (It should be equal to 'n').
>
> (mem_buf.size != n).
>
> This script fails on the above read check.
>
> Any ideas what I might be doing wrong here. Any help will be
> appreciated.

Either, the file is smaller than n or you have an issue with
conversion (typically on Windows).  For binary files I'd do this which
is more portable:

mem_buf = File.open(file_name,"rb") {|io| io.read}

Also, it helps documenting things. Bw, you do not need the offset and
size arguments.

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end