From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_REPLYTO_END_DIGIT, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id E66D11F4B4 for ; Sat, 17 Oct 2020 13:37:47 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id CA1D83857C4E; Sat, 17 Oct 2020 13:37:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CA1D83857C4E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1602941866; bh=BTbKEAyLRHVp3K9LjQShwobCf9EjIHKddF8d5LNJ9Go=; h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=y2NjNFK/npLqGy5whKT7fL2plCkzhBQqCge/Ddwh62UPgNOwVa7vRu1mC+cYtoKQa lS4C3c9Jc9kECrbsck8d5e2XiGvRfWqMRZJE0RowNlBZnp4cgnUhjOto6RTkfBzIHG /ZaALdvLBSjnPXINnXOiBziPecd5RSyT/RG31BiU= Received: from mail-wr1-x442.google.com (mail-wr1-x442.google.com [IPv6:2a00:1450:4864:20::442]) by sourceware.org (Postfix) with ESMTPS id 940AE3857C4D for ; Sat, 17 Oct 2020 13:37:44 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 940AE3857C4D Received: by mail-wr1-x442.google.com with SMTP id h5so6530990wrv.7 for ; Sat, 17 Oct 2020 06:37:44 -0700 (PDT) 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=ta7za7Wy+KC+UhtMwhAdG0+qzlJphZSTL0J/jVVJWW93LDGDRf1oOoOlTM1lRnhMkJ jD4/NmSn3Sme73S31RpaYf0ulh2DfDXosK5qFBQPKseMKp/k19hZDrCaijh+k02qAV6i zMSDj+DGFZ6wPZ0dlf2+AiNo4TYiNYEVRG/ldLRrftaU59suJrV0v8tmyJiHSzyqUZYI EKBAacXK8C+sDwLdjSEZVtgnsrYIEbXfVRjP7Gdd9y3NhE0jwF/XgDNLclXpZho48xEQ CofU3boOKUnz7WqqlRIE6KM89zNyerBocGC5t6CoDB3aW4KctKRPcpCFwaOUmmqYREHm Cj7w== X-Gm-Message-State: AOAM5335hVKob6jcFVjLs6o1tO+AtWkVgYGZlXXFYDfqnZ4PfEJVa+HY hQjyjOrsb7yoQxlTmvkR6Ep1IDrCDPs= 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 References: <20201017132748.150322-1-colomar.6.4.3@gmail.com> 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 X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Alejandro Colomar via Libc-alpha Reply-To: Alejandro Colomar Cc: linux-man@vger.kernel.org, libc-alpha@sourceware.org Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" 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) >