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=-13.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B03E6C19437 for ; Tue, 8 Dec 2020 22:05:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87D6323AC4 for ; Tue, 8 Dec 2020 22:05:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730716AbgLHWEz (ORCPT ); Tue, 8 Dec 2020 17:04:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54088 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730697AbgLHWEs (ORCPT ); Tue, 8 Dec 2020 17:04:48 -0500 Received: from mail-ot1-x341.google.com (mail-ot1-x341.google.com [IPv6:2607:f8b0:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 49603C061282 for ; Tue, 8 Dec 2020 14:03:54 -0800 (PST) Received: by mail-ot1-x341.google.com with SMTP id o11so255543ote.4 for ; Tue, 08 Dec 2020 14:03:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ttaylorr-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=tgwQSV0Jx2RFdjihG4qsp3emQ8nruJR26Qc29XYgvWk=; b=oDWgLk2eutaDLo36krbya8wCZEvFHPhyPDejQJVfqZ8UZFRzwmPeE9wC25nhWimTx5 2NqBnZaK9skVuS9LfMwTPuzEH+XNT2tslkHFv17SQjvgXBmrqa2VWV/Wm0n6HwAPOVPT sxkMbAJQf+3Vag4kd0qS+BalrZJOJiI5IntnRYAKgkPr6I05tc6vUZP0nAGovXcaLzm1 jbyuJLgTIc+1H4VIWOfKaFeMHMRAqNuLiInC6AUmUVZIjGish4BX3CqbpWNEITaTa9JD 0eEEp5rWDxNAI7ll7RFnboYT7u1oNqSheKoZ4rm5y9v7folZsdJl6V1Ltu60r8rpPZ3R L9Gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=tgwQSV0Jx2RFdjihG4qsp3emQ8nruJR26Qc29XYgvWk=; b=rMPCDUPwIy8lCK1fvLADKfFQ4MVlwAyci90p3U3+A5kJ+SJuwlya5fGud75NcqZTEX KzDOML22ZZm191kveLKf1NDqyEbIdo3Abb3rfJ1QgBkw0QqvLk5XFtVKPP0a9aS3QXX7 8vhE5O+BCcug0uwBpqdlvTo1Va3clsGiGaM/gzA6U5Lcr5OjdZSoizaWdPf6VdlvDHIw ab/Tk5onIBsY4ywb80WtSkzj9xsiNVlTYT2uw8Abu8qxrQy4lR08Ql4fikVdgYJxTtrr Lxq3xO7tNEHFqV9IEtA+9Ed7DPeAWeMkOLMqPdOtMoaLEWQq1OrCzjnIFQDAptA/S04G MVrw== X-Gm-Message-State: AOAM530WQ+W5oD/4Gba2ggtQNC1BdTzvvNSC5YoI7u8xaGiKvwX7yXcQ JeMl0jBSzqqkDMz7ax1PgJIHT7SgPK8ygvhv X-Google-Smtp-Source: ABdhPJxlI/MRTD6NlzPCWOVIsKxqCL/m6ORPvwHJAHUBfQ6VGRyt1xIZ4sWiemls0yHUjvgN6UMjrA== X-Received: by 2002:a9d:39f5:: with SMTP id y108mr129616otb.63.1607465033396; Tue, 08 Dec 2020 14:03:53 -0800 (PST) Received: from localhost ([8.44.146.30]) by smtp.gmail.com with ESMTPSA id l1sm55670ooi.48.2020.12.08.14.03.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Dec 2020 14:03:52 -0800 (PST) Date: Tue, 8 Dec 2020 17:03:50 -0500 From: Taylor Blau To: git@vger.kernel.org Cc: peff@peff.net, jonathantanmy@google.com, dstolee@microsoft.com, gitster@pobox.com Subject: [PATCH v4 09/24] ewah: add bitmap_dup() function Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org From: Jeff King There's no easy way to make a copy of a bitmap. Obviously a caller can iterate over the bits and set them one by one in a new bitmap, but we can go much faster by copying whole words with memcpy(). Signed-off-by: Jeff King Signed-off-by: Taylor Blau --- ewah/bitmap.c | 7 +++++++ ewah/ewok.h | 1 + 2 files changed, 8 insertions(+) diff --git a/ewah/bitmap.c b/ewah/bitmap.c index 0a3502603f..b5f6376282 100644 --- a/ewah/bitmap.c +++ b/ewah/bitmap.c @@ -35,6 +35,13 @@ struct bitmap *bitmap_new(void) return bitmap_word_alloc(32); } +struct bitmap *bitmap_dup(const struct bitmap *src) +{ + struct bitmap *dst = bitmap_word_alloc(src->word_alloc); + COPY_ARRAY(dst->words, src->words, src->word_alloc); + return dst; +} + static void bitmap_grow(struct bitmap *self, size_t word_alloc) { size_t old_size = self->word_alloc; diff --git a/ewah/ewok.h b/ewah/ewok.h index 011852bef1..1fc555e672 100644 --- a/ewah/ewok.h +++ b/ewah/ewok.h @@ -173,6 +173,7 @@ struct bitmap { struct bitmap *bitmap_new(void); struct bitmap *bitmap_word_alloc(size_t word_alloc); +struct bitmap *bitmap_dup(const struct bitmap *src); void bitmap_set(struct bitmap *self, size_t pos); void bitmap_unset(struct bitmap *self, size_t pos); int bitmap_get(struct bitmap *self, size_t pos); -- 2.29.2.533.g07db1f5344