A :crlf layer is automatically added on Windows. :crlf converts 0D 0A into 0A on read, and it converts 0A into 0D 0A on write.

:crlf is unfortunately added before the explicitly-specified layers, so it's performing the conversion on the encoded strings when it should be performed on the decoded strings. For ASCII-based encodings (e.g. UTF-8), this isn't a problem. But for UTF-16le, this does the wrong thing.

You can address the problem by using the following: 

open my $IN,  "<:raw:encoding(UTF-16LE):crlf", "in.xml";
open my $OUT, ">:raw:encoding(UTF-16LE):crlf", "out.xml";

[download]

:raw prevents the :crlf layer from being added in the first place, and then we add it explicitly on the right side* of the :encoding layer.

(Note that I also replaced the needless use of global variables with the use of lexically-scoped variables.)

* — Pun intended.

In reply to Re: CR-LF on UTF-16LE files on Windows by ikegami
in thread CR-LF on UTF-16LE files on Windows by vitoco

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