Thursday, November 29, 2012

Re: Automatically change encoding when opening file

On 15:41 Thu 29 Nov , Ven Tadipatri wrote:
> On Thu, Nov 15, 2012 at 8:31 AM, Tony Mechelynck
> <antoine.mechelynck@gmail.com> wrote:
>
> >
> > If a file in UTF-16le has a BOM (the codepoint U+FEFF at the very beginning
> > of the file, which for UTF-16le means the bytes 0xFF 0xFE), then if you have
> > set Vim to use UTF-8 'encoding' in your vimrc that file will usually be
> > opened correctly (because the default 'fileencodings' -plural- starts with
> > "ucs-bom"). See http://vim.wikia.com/wiki/Working_with_Unicode about how to
> > set Vim up like that.
> >
>
> Hi Antoine,
>
> I'm not really that familiar with the different encoding types (UTF-8,
> UTF-16, etc), but when I came across a strange <feff> character which
> I think is related to what you're describing.
> I open up two files in gedit and they seem to contain the same exact
> line. But in vim, there's a strange character at the beginning
> "<feff>". It's not a string, because if I go to the beginning of the
> line and hit 'x', it deletes the entire <feff>, indicating it's some
> sort of special hidden character.
> What is this strange character? In Vi's hex mode (%!xxd), I can see
> there is a sequence of bits "efbbbf", and the rest of the file seems
> to somehow be offset
>
> Thanks,
> Ven
>
>
>
> >
> > Best regards,
> > Tony.
> > --
>
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Hi,

This is the bom (byte order mark) character:
http://en.wikipedia.org/wiki/Byte_order_mark

<feff> is the BOM character for UTF-16 encoding. UTF-16 uses 2 bytes to
encode a character, but the order of them might differ. This BOM
character tells which byte comes first.

Best,
Marcin

Best,
Marcin

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