From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: How to walk a Lisp_String? Date: Thu, 01 Sep 2022 11:42:06 -0400 Message-ID: References: <87a67jw1kw.fsf@elite.giraud> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="15969"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: "emacs-devel" To: Manuel Giraud Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Sep 01 17:44:45 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oTmN2-0003we-RA for ged-emacs-devel@m.gmane-mx.org; Thu, 01 Sep 2022 17:44:44 +0200 Original-Received: from localhost ([::1]:53004 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oTmN1-0000ka-Uu for ged-emacs-devel@m.gmane-mx.org; Thu, 01 Sep 2022 11:44:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:58112) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oTmKh-0006H9-HP for emacs-devel@gnu.org; Thu, 01 Sep 2022 11:42:19 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:64736) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oTmKf-0002rf-24 for emacs-devel@gnu.org; Thu, 01 Sep 2022 11:42:18 -0400 Original-Received: from pmg1.iro.umontreal.ca (localhost.localdomain [127.0.0.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id E1D0F1005C1; Thu, 1 Sep 2022 11:42:14 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg1.iro.umontreal.ca (Proxmox) with ESMTP id 4BB8A100189; Thu, 1 Sep 2022 11:42:13 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1662046933; bh=U+Za4/SEIWzlXZcyiNZiTYgE/K2fw07jgcqqU6WO3eI=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=aqcX6pvTJZOSm6El3NVw3xJESBSKaWuZ/diiQ+w3ubWY5U6lXIpylV43niGqkmZ91 Qnx//z1GGtEvvoZlkuCCKiawo2x+j1zgipw7YFn9tSl5+1PuyRU4fbTcqXclR7OM2Z sjEwk5cgCpxWZFX9kDRrilZnbTqLioiORZbbJ9sUDfbVqzpWDfDTNc/uWiWYybNURd 5u4vWhDUnLvmBIWmo0NlUG34aGs8zSDC9oKAeptyz2wnFNfoErMqIh8UlqIDvSyINg KwT6Vqwn6pnLcm8M9v9wey//aj8JN6VEdbd5C27ri948z90O5hO34NQNNH0piekVwu 9a/98WoPyOzGQ== Original-Received: from lechazo (lechon.iro.umontreal.ca [132.204.27.242]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id B35491201E3; Thu, 1 Sep 2022 11:42:12 -0400 (EDT) In-Reply-To: <87a67jw1kw.fsf@elite.giraud> (Manuel Giraud's message of "Thu, 01 Sep 2022 17:34:23 +0200") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:294490 Archived-At: > I'm at a point where I'd like to walk a struct Lisp_String one > =ABcharacter=BB at a time. Of course, I should be able to handle multi-b= yte > Lisp_String. How could I do that? SDATA gives you a pointer to the actual bytes of the string, and then you can use `string_char_and_length` to read a char along with its size in bytes (you have to keep track of your "charpos" and "bytepos" separately). Stefan