From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sun He Subject: [PATCH v3] Replace memcpy with hashcpy when dealing hash copy globally Date: Mon, 3 Mar 2014 17:39:59 +0800 Message-ID: <1393839599-6955-1-git-send-email-sunheehnus@gmail.com> Cc: sunshine@sunshineco.com, mhagger@alum.mit.edu, pclouds@gmail.com, Sun He To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Mon Mar 03 10:41:34 2014 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WKPNM-0000pC-5X for gcvg-git-2@plane.gmane.org; Mon, 03 Mar 2014 10:41:32 +0100 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754141AbaCCJl2 (ORCPT ); Mon, 3 Mar 2014 04:41:28 -0500 Received: from mail-pa0-f54.google.com ([209.85.220.54]:33230 "EHLO mail-pa0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752263AbaCCJl1 (ORCPT ); Mon, 3 Mar 2014 04:41:27 -0500 Received: by mail-pa0-f54.google.com with SMTP id lf10so875110pab.13 for ; Mon, 03 Mar 2014 01:41:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id; bh=AYzLQzudPSASWacx89Sy8KDfrhCv2NbjxbT9n/qj5PM=; b=tE5rQhSREYG8tQXJL2E5qhjJacLrm3YPV6GJI/8TnVZAcaOE4rNBL6wZq7jkGKuM39 yXFhElXBTffg0+xUQBFmBzMI+aww/Nl8QFLcdHJD2hH9V7XkcTWlMwTeMNWgpYdT04Ny HYaBpwXqH6HH9UXy7Niapg8K8yWp8dxFBZpeHkFRzcRDLoIide8HrShjAnNeKMQRAiE9 DTDYYaYQdKTvokYB3KcggfjdNGKDJSWRsjmV3kiZ3LBgzw61aWJmON7XWkGyUPfeJxmX 8l+J/6lOic31Tb45h1ZFaE8xT65ZvqjBnyTPMJSXZpaSQDsFiJDQn8lS66xT+fMKn9z3 V32A== X-Received: by 10.66.248.227 with SMTP id yp3mr5609384pac.116.1393839686504; Mon, 03 Mar 2014 01:41:26 -0800 (PST) Received: from ENIGMA.61.134.1.4 ([61.150.43.99]) by mx.google.com with ESMTPSA id vg1sm34129285pbc.44.2014.03.03.01.41.18 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 03 Mar 2014 01:41:25 -0800 (PST) X-Mailer: git-send-email 1.9.0.138.g2de3478.dirty Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: Replacing memcpy with hashcpy is more directly and elegant. Leave ppc/sha1.c alone, as it is an isolated component. Pull cache.h(actually ../cache.h) in just for one memcpy there is not proper. Helped-by: Michael Haggerty Helped-by: Duy Nguyen Signed-off-by: Sun He --- PATCH v3 delete the one-space indentation on each line of commit message as is suggested by Eric Sunshine. Thanks to Eric Sunshine. PATCH v2 leave ppc/sha1.c alone. The general rule is if cache.h or git-compat-util.h is included, it is the first #include, and system includes will be always in git-compat-tuil.h. via Duy Nguyen The change in PATCH v1 is not proper because I placed cache.h in the end. And adding it to the head is not a good way to achieve the goal, as is said above "---". Thanks to Duy Nguyen. Find the potential places with memcpy by the bash command: $ find . | xargs grep "memcpy.*\(.*20.*\)" ppc/sha1.c doesn't include cache.h and it cannot use hashcpy(). So just leave memcpy(in ppc/sha1.c) alone. bundle.c | 2 +- grep.c | 2 +- pack-bitmap-write.c | 2 +- reflog-walk.c | 4 ++-- refs.c | 2 +- 5 files changed, 6 insertions(+), 6 deletions(-) diff --git a/bundle.c b/bundle.c index e99065c..7809fbb 100644 --- a/bundle.c +++ b/bundle.c @@ -19,7 +19,7 @@ static void add_to_ref_list(const unsigned char *sha1, const char *name, list->list = xrealloc(list->list, list->alloc * sizeof(list->list[0])); } - memcpy(list->list[list->nr].sha1, sha1, 20); + hashcpy(list->list[list->nr].sha1, sha1); list->list[list->nr].name = xstrdup(name); list->nr++; } diff --git a/grep.c b/grep.c index c668034..f5101f7 100644 --- a/grep.c +++ b/grep.c @@ -1650,7 +1650,7 @@ void grep_source_init(struct grep_source *gs, enum grep_source_type type, break; case GREP_SOURCE_SHA1: gs->identifier = xmalloc(20); - memcpy(gs->identifier, identifier, 20); + hashcpy(gs->identifier, identifier); break; case GREP_SOURCE_BUF: gs->identifier = NULL; diff --git a/pack-bitmap-write.c b/pack-bitmap-write.c index 1218bef..5f1791a 100644 --- a/pack-bitmap-write.c +++ b/pack-bitmap-write.c @@ -530,7 +530,7 @@ void bitmap_writer_finish(struct pack_idx_entry **index, header.version = htons(default_version); header.options = htons(flags | options); header.entry_count = htonl(writer.selected_nr); - memcpy(header.checksum, writer.pack_checksum, 20); + hashcpy(header.checksum, writer.pack_checksum); sha1write(f, &header, sizeof(header)); dump_bitmap(f, writer.commits); diff --git a/reflog-walk.c b/reflog-walk.c index b2fbdb2..d490f7d 100644 --- a/reflog-walk.c +++ b/reflog-walk.c @@ -32,8 +32,8 @@ static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1, sizeof(struct reflog_info)); } item = array->items + array->nr; - memcpy(item->osha1, osha1, 20); - memcpy(item->nsha1, nsha1, 20); + hashcpy(item->osha1, osha1); + hashcpy(item->nsha1, nsha1); item->email = xstrdup(email); item->timestamp = timestamp; item->tz = tz; diff --git a/refs.c b/refs.c index 89228e2..f90b7ea 100644 --- a/refs.c +++ b/refs.c @@ -1222,7 +1222,7 @@ static int resolve_gitlink_packed_ref(struct ref_cache *refs, if (ref == NULL) return -1; - memcpy(sha1, ref->u.value.sha1, 20); + hashcpy(sha1, ref->u.value.sha1); return 0; } -- 1.9.0.138.g2de3478.dirty