From: Bill Kelly <billk@...>
Date: 2010-06-26T08:44:29+09:00
Subject: Re: marshalled data in 1.9

Roger Pack wrote:
>> irb(main):002:0> File.open("zz", "w") {|io| io.write 
>> "foo\r\nbar\nbaz\n"}
>> => 16
>> irb(main):003:0> File.read("zz")
>> => "foo\n\nbar\nbaz\n"
>>
>>
>> Notice the "\r\n" came back as "\n\n".
> 
> This feels like a bug to me...

If I could pick one statement to summarize my feeling
about developing on Windows, that might be it.  ;P

But anyway...

It's not strictly a ruby issue.  I recall encountering CRLF
text mode vs. binary mode issues in DOS with Borland C
in the mid 1980's.

But, back to the ruby example above... I don't see
how one could expect the data to survive a round trip.

Note that if we force ruby to deal with a single
character at a time, the results are consistent with
the above:

irb(main):004:0> File.open("zz2", "w") {|io| "foo\r\nbar\nbaz\n".each_char {|c| io.write c; io.flush}}
=> "foo\r\nbar\nbaz\n"

irb(main):005:0> File.open("zz2", "r") {|io| x=c=""; x << c while (c = io.getc); x}
=> "foo\n\nbar\nbaz\n"



So... it's not clear to me how round-trip semantics
could be implemented given the need to consider each
character individually?


Regards,

Bill