From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: pjb@informatimago.com (Pascal J. Bourguignon) Newsgroups: gmane.emacs.help Subject: Re: Constructing and Manipulating Raw Strings Date: Wed, 13 Oct 2010 17:53:24 +0200 Organization: Informatimago Message-ID: <87tykqhyx7.fsf@kuiper.lan.informatimago.com> References: <1bef9c40-265a-4519-bf4a-a4ca443cab15@n40g2000vbb.googlegroups.com> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Trace: dough.gmane.org 1291874104 25662 80.91.229.12 (9 Dec 2010 05:55:04 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Thu, 9 Dec 2010 05:55:04 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Dec 09 06:54:58 2010 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PQZSz-0005bs-Vr for geh-help-gnu-emacs@m.gmane.org; Thu, 09 Dec 2010 06:54:58 +0100 Original-Received: from localhost ([127.0.0.1]:34446 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PQYar-0001y1-Tk for geh-help-gnu-emacs@m.gmane.org; Wed, 08 Dec 2010 23:59:01 -0500 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 20 Original-X-Trace: individual.net 9hBWmazial+41kqSGqszDAxW2bBPeRyhu/6Axjo4zCimOanfQ1 Cancel-Lock: sha1:YWRmNzg1MDllMDIxMjM2OGFhNjIxODY3ODJiYTYwNzA5MzgwZjM4Mw== sha1:ch82mn5tpwf01cXh1lnuTbhFCTU= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en X-Disabled: X-No-Archive: no User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:181757 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:76764 Archived-At: Nordlöw writes: > What is the best way to extract the individual bytes from hexadecimal > string (output from md5) and using them as input into a call to > unibyte-string()? > > I want to use this raw string as a key in a hash table for file types > and then I don't want to waste space (size halves if we go from a > hexadecimal string to a raw byte string). > > Does read() (or some of its variants) support reading raw unibyte > strings (that may contain zero bytes). You can use decode-hex-string instead: (decode-hex-string "4142434445464748494a4b4c4d4e4f") --> "ABCDEFGHIJKLMNO" -- __Pascal Bourguignon__ http://www.informatimago.com/