From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,NICE_REPLY_A, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FDE0C433E7 for ; Sat, 17 Oct 2020 13:37:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4FCEA206D4 for ; Sat, 17 Oct 2020 13:37:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CtETlhe6" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438161AbgJQNhq (ORCPT ); Sat, 17 Oct 2020 09:37:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438160AbgJQNhp (ORCPT ); Sat, 17 Oct 2020 09:37:45 -0400 Received: from mail-wr1-x444.google.com (mail-wr1-x444.google.com [IPv6:2a00:1450:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6E61C061755 for ; Sat, 17 Oct 2020 06:37:44 -0700 (PDT) Received: by mail-wr1-x444.google.com with SMTP id i1so6561051wro.1 for ; Sat, 17 Oct 2020 06:37:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=BTbKEAyLRHVp3K9LjQShwobCf9EjIHKddF8d5LNJ9Go=; b=CtETlhe6X1TqW49MzJIzzWlCpvvIXgt0ZHUcN4mzG7Kemvy0U52yp8eciVFJ4+6N19 CYvMQpCU7RhkUncVs6FnNOn7FdiERSJB9ThHBC8IZH2gNvfpLtz5eBavqLIhc0mrKYrz 9xATetol0RRfO4p76H83tjD5icubLVV5/0QXjTwkVEHB5vjHv2XvpnHe4MnKwENNb2DS MD9K8UP2CzUNq04cZlMIQ4pmId/La8lf65jWBHhvLk2OyAsx0vZ9xZX3L2WPlqDsW66/ SsmNmGmQ0FN/yh1GT+UKUodgGmlkI6UZ84R7ucclA+SJPgRbyJBeaJINDRSSFmbLjOin Norw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=BTbKEAyLRHVp3K9LjQShwobCf9EjIHKddF8d5LNJ9Go=; b=hndkX1p/8Etlt19xBznu9C6NYWzRCcayDNwELPv2l6BhB5VH12mOv6ZrDb6O2m1Vgt jBxK7Pk6v1h/Sr3bt83W1kItD6z2lCwHH8+C6Mt40nJTTs2TdNdNyuC/obx8/yxelr6V rwI4/x3j7Sfo4fgCW5UjqUUUAndWI+yUNjeQghTxOdkKCmvCze5Bzun3q7+BNst2VyYk K/YPGDeoLEvN0aMVyPTAvBB3R5D8lrggFi51vIcHJbm6PCbv6HVCOznL+HGnBC5EYHrQ JKlkySPaAKGpx3sDNl7VttikvcoTzf+BVevZuFvWlWsFY8zcua8S7WaDFnSatunTLvV+ RG1g== X-Gm-Message-State: AOAM533ts74ipFFbv6KPa1Z2M7tXcjE6jNU9mR9u2gGsF+qO/Tw6qBMT lfukkOldSZQa1kMRnXHkpzIkMuL5EYA= X-Google-Smtp-Source: ABdhPJwZ1aXEdO2lqbb9rWrGwZ+r9DtelFfFuV7MQGDI1PMw1vK67II+kEqRku4YM8J7lRmMuJT7dQ== X-Received: by 2002:a5d:6cae:: with SMTP id a14mr10606859wra.187.1602941863486; Sat, 17 Oct 2020 06:37:43 -0700 (PDT) Received: from [192.168.0.160] ([170.253.49.0]) by smtp.gmail.com with ESMTPSA id i9sm7577201wma.47.2020.10.17.06.37.42 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 17 Oct 2020 06:37:42 -0700 (PDT) Subject: Re: [PATCH v2] regex.3: Add example program To: mtk.manpages@gmail.com Cc: linux-man@vger.kernel.org, libc-alpha@sourceware.org References: <20201017132748.150322-1-colomar.6.4.3@gmail.com> From: Alejandro Colomar Message-ID: <6d7ea902-357d-9581-83dc-fdeb14a592b4@gmail.com> Date: Sat, 17 Oct 2020 15:37:42 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20201017132748.150322-1-colomar.6.4.3@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org Oops, I should've used \e instead of \\ (see below). Please fix that :) Thanks, Alex On 10/17/20 3:27 PM, Alejandro Colomar wrote: > $ gcc -Wall -Wextra -Werror -pedantic regex.c -o regex > $ ./regex.3 > String = "1) John Driverhacker; > 2) John Doe; > 3) John Foo; > " > Matches: > #0: > offset = 25; length = 7 > substring = "John Do" > #1: > offset = 38; length = 8 > substring = "John Foo" > > Signed-off-by: Alejandro Colomar > --- > > Hi Michael, > > Now it's much better :) > > Cheers, > > Alex > > man3/regex.3 | 42 +++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 42 insertions(+) > > diff --git a/man3/regex.3 b/man3/regex.3 > index 7c5132995..72e576cc6 100644 > --- a/man3/regex.3 > +++ b/man3/regex.3 > @@ -337,6 +337,48 @@ T} Thread safety MT-Safe > .TE > .SH CONFORMING TO > POSIX.1-2001, POSIX.1-2008. > +.SH EXAMPLES > +.EX > +#include > +#include > +#include > +#include > + > +#define ARRAY_SIZE(arr) (sizeof((arr)) / sizeof((arr)[0])) > + > +static const char *const str = > + "1) John Driverhacker;\en2) John Doe;\en3) John Foo;\en"; > +static const char *const re = "John.*o"; > + > +int main(void) > +{ > + static const char *s = str; > + regex_t regex; > + regmatch_t pmatch[1]; > + regoff_t off, len; > + > + if (regcomp(®ex, re, REG_NEWLINE)) > + exit(EXIT_FAILURE); > + > + printf("String = \\"%s\\"\en", str); Here (twice) > + printf("Matches:\en"); > + > + for (int i = 0; ; i++) { > + if (regexec(®ex, s, ARRAY_SIZE(pmatch), pmatch, 0)) > + break; > + > + off = pmatch[0].rm_so + (s \- str); > + len = pmatch[0].rm_eo \- pmatch[0].rm_so; > + printf("#%d:\en", i); > + printf("offset = %jd; length = %jd\en", (intmax_t) off, (intmax_t) len); > + printf("substring = \\"%.*s\\"\en", len, s + pmatch[0].rm_so); And here (twice again) > + > + s += pmatch[0].rm_eo; > + } > + > + exit(EXIT_SUCCESS); > +} > +.EE > .SH SEE ALSO > .BR grep (1), > .BR regex (7) >