From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Cecilio Pardo Newsgroups: gmane.emacs.devel Subject: Re: Using a temp file from emacs C code Date: Sun, 27 Oct 2024 09:22:53 +0100 Message-ID: References: <1074f1ac-3ac4-4d91-9aec-8d86f3afba2a@imayhem.com> <867c9uax31.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="31144"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla Thunderbird Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Oct 27 09:23:23 2024 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 1t4yYV-00080b-59 for ged-emacs-devel@m.gmane-mx.org; Sun, 27 Oct 2024 09:23:23 +0100 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t4yY9-0004Ce-69; Sun, 27 Oct 2024 04:23:01 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t4yY6-0004CV-LI for emacs-devel@gnu.org; Sun, 27 Oct 2024 04:22:58 -0400 Original-Received: from mail.imayhem.com ([82.223.54.191] helo=zealous-pike.82-223-54-191.plesk.page) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1t4yY4-00077z-AK; Sun, 27 Oct 2024 04:22:58 -0400 Original-Received: from [192.168.68.104] (111.red-88-21-7.staticip.rima-tde.net [88.21.7.111]) by zealous-pike.82-223-54-191.plesk.page (Postfix) with ESMTPSA id C79AD80421; Sun, 27 Oct 2024 08:22:53 +0000 (UTC) Authentication-Results: zealous-pike.82-223-54-191.plesk.page; spf=pass (sender IP is 88.21.7.111) smtp.mailfrom=cpardo@imayhem.com smtp.helo=[192.168.68.104] Received-SPF: pass (zealous-pike.82-223-54-191.plesk.page: connection is authenticated) Content-Language: es-ES In-Reply-To: <867c9uax31.fsf@gnu.org> Received-SPF: pass client-ip=82.223.54.191; envelope-from=cpardo@imayhem.com; helo=zealous-pike.82-223-54-191.plesk.page X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:324874 Archived-At: On 27/10/2024 7:17, Eli Zaretskii wrote: >> How should I create and use a temp file from emacs' C code? > > By first trying to avoid it, and do it from Lisp instead ;-) > > But if you absolutely have no other way, then... I promise. >> I got this working but it doesn't look right: >> >> - Call lisp function make-temp-file, trough funcall >> - Convert the returned string to utf-16 (because of Windows) >> - Then to read the file use emacs_fopen > > I don't understand: if you create the file, why do you need to read it > back? why not simply pass whatever you write to the file to the code > which needs to read it, as a string or a temp buffer? Sorry, I oversimplified. I'm calling a winapi function that writes the file. > Anyway, you could use Fmake_temp_file_internal instead. You can see > an example of that in the implementation of native-elisp-load. And > for reading a file (if you really need it; see above) use > Finsert_file_contents, it will handle the issues with encoding the > file name etc. for you. (But beware of hidden rocks if you do this in > code that needs to be run early during Emacs bootstrap.) Thanks. Not this time.