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From: Kevin Rodgers <kevin.d.rodgers@gmail.com>
To: help-gnu-emacs@gnu.org
Subject: Re: Making re-search-forward search for \377
Date: Sun, 02 Nov 2008 11:10:18 -0700	[thread overview]
Message-ID: <gekqe1$jbh$1@ger.gmane.org> (raw)
In-Reply-To: <87prlepk45.fsf@pcdesk.net>

Tyler Spivey wrote:
> Xah <xahlee@gmail.com> writes:
> 
>> what's the C-q 377 char?
>>
>> if i press Ctrl+q 377 Enter, i get this char: ÿ, which is LATIN SMALL
>> LETTER Y WITH DIAERESIS (unicode U+00FF).
>>
>> Then if i do:
>>
>> (re-search-forward "ÿ")
>>
>> it works perfectly.
>>
>> as far as my experience goes, the ease of programing with unicode in
>> elisp beats Perl and Python hands down...
> 
> I'm probably going to end up working with binary data in a temp
> buffer. Doing more research, I want enable-multibyte-characters to be
> off. Given that, if we go to *scratch*
> and run M-X toggle-enable-multibyte-characters until that variable
> becomes nil, doing C-Q 377 RET gives 0xff, which is what I want
> (according to C-x =, C-u C-x = and M-x describe-char). Now to
> match it, I try:
> 
> (re-search-forward "\xff") - no luck
> 
> What did you use to figure out that the multibyte version of that
> character was 0x00FF? I found it out accidentally as a lisp error, but
> none of the previously described commands (C-X =, M-X describe-char or
> C-u C-x =) will show that it is 0x00ff, they just show FF.

`C-u C-x =' shows this:

   character: ÿ (2303, #o4377, #x8ff, U+00FF)

-- 
Kevin Rodgers
Denver, Colorado, USA





  reply	other threads:[~2008-11-02 18:10 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-02  7:31 Making re-search-forward search for \377 Tyler Spivey
2008-11-02  8:45 ` Xah
2008-11-02  9:12   ` Tyler Spivey
2008-11-02 18:10     ` Kevin Rodgers [this message]
2008-11-02 20:32     ` Xah
2008-11-02 22:35       ` Tyler Spivey
2008-11-03  4:21     ` Eli Zaretskii
     [not found]     ` <mailman.2743.1225686066.25473.help-gnu-emacs@gnu.org>
2008-11-03  4:54       ` Tyler Spivey
2008-11-03 19:42         ` Eli Zaretskii

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