From: Robert Dober <robert.dober@...>
Date: 2009-08-19T16:31:25+09:00
Subject: Re: fromdos dos2unix in ruby

On Wed, Aug 19, 2009 at 12:38 AM, Xavier Noria<fxn@hashref.com> wrote:
> On Tue, Aug 18, 2009 at 11:39 PM, Robert Dober<robert.dober@gmail.com> wrote:
>
>> Yup, I thought my code solved the issue, tell Ruby that a line ends
>> with "\n" ( that was tough to type ;) in each and replace a potential
>> "\r" before?
>> But maybe this does not work on binary files under Windows, no way to
>> test, sorry.
>
> The idea is good, but this topic is brittle (though easy when you get
> the facts straight).
>
> Problem is on CRLF platforms the I/O system filters out the CR of any
> pair CRLF before the string arrives to Ruby land. That is, if you work
> in text-mode. In fact that is the definition of text-mode, that the
> conversion is on.
>
> When you write in text mode in a CRLF platform, the I/O system
> monitors the stream of bytes, and inserts a CR every time he sees an
> LF. Unconditionally.
>
> On Unix these conversions do not happen, text-mode and binary-mode are
> the same, and Unix uses LF on disk to mean a newline.
>
> And the point is those conversions happen in text-mode *no matter
> which is the input record separator*, so in those solution the file
> opened for reading should be opened in binary mode anyway. If you
> don't do this, a file that has on disk
But I did open it in binary mode, did I not?
Anyway, if I had a typo in my snippet, thanx for the correction.

The only issue I can see is the following

Newline = "\n" || 10.chr || "\012" || ";-)"

file.open( "...", "rb"){ | f |
   f.each( Newline )  { ...
####### ^
####### Does this work on Windows?

Cheers
Robert