From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS31976 209.132.180.0/23 X-Spam-Status: No, score=-5.9 required=3.0 tests=AWL,BAYES_00, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD shortcircuit=no autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by dcvr.yhbt.net (Postfix) with ESMTP id 404172023C for ; Tue, 5 Jul 2016 11:24:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932900AbcGELYD (ORCPT ); Tue, 5 Jul 2016 07:24:03 -0400 Received: from mout.gmx.net ([212.227.15.15]:58782 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932866AbcGELXs (ORCPT ); Tue, 5 Jul 2016 07:23:48 -0400 Received: from virtualbox ([37.24.141.253]) by mail.gmx.com (mrgmx001) with ESMTPSA (Nemesis) id 0LeN3N-1betPi0HpV-00qE2G; Tue, 05 Jul 2016 13:23:39 +0200 Date: Tue, 5 Jul 2016 13:23:38 +0200 (CEST) From: Johannes Schindelin X-X-Sender: virtualbox@virtualbox To: git@vger.kernel.org cc: Junio C Hamano , Eric Sunshine , Jeff King , Johannes Sixt , Duy Nguyen Subject: [PATCH v2 07/17] merge-recursive: avoid returning a wholesale struct In-Reply-To: Message-ID: <435b2f32f52f6bec73ce702f71510eb9363e99ef.1467717730.git.johannes.schindelin@gmx.de> References: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Provags-ID: V03:K0:IN3f4tzi8E8EXDNsWkbkAuUTisSDVXmxHHEOZ3D8WcXpCHTqk2i k3wSVFRFlPI8nFzknP1RH9YN8xBqPLokOhEAgKs5CguuCI2nWu9tPQXMgcL17yyJTHP0fSR 4Fc69DNYCuUFpltrK3iIVPJqC84LXame/vjgWl4semtgiwsmsmYQgDSKRrq0TtxlMv0p4Lw e+tQCtv7OLp8349I1gzMg== X-UI-Out-Filterresults: notjunk:1;V01:K0:4fAuzyDfuLc=:gLpDozR8AHa4KLrXKCKls6 Qfnz48zUWVDYKSvameNKYgMJpD1399SFmf7crnPzvEHKpvsq9MIqNFbizHIL2TnzlwW6jqpdQ RlLPzlfC2Ogzb7mmq0TyZ81wREC4z/tOMPD17njPPt0P7A6o+SR8Lp6Df0DY3vUb+TLV+LNUN oq2C0Gb5No5cyGDQV+FelPA1d5dEdKK6+Dxu0Z8PVllF1c+3SZoix6x5EfPRl/giQOIm2DT9r 9MHVJyCtJuRLAIelsoarAOdc+eLax0a/5x6DApIUsL7Uf3SdDB0jFTNqEnaCjTwMH/Opsknq8 trKqYUH6u6NXaXdP0Ro9LB38khRWhW78GxLA6aPzTGHHQ2iGB7QgvKI79zlsd7yIDPb6vfwm5 DrXF+OaXZoFeMLUMC8ikTvUib8sTl//FZB5FxczdmDdaIJ5iotF1KQ4C7mPBtbaN5vNMgD532 p4EZ9p8NC3pnN5JEk0vDxO/ZW47Uw1ZIFtDj2Su5+o5Qgq+cztXOM49pWqIS1e4DOLNJ/ZdGt lDiaHVSph29S8FAYPDOmsu+ItKwMpIDBkRdF9NpSzRHXLDxSFpxq9uZ/efirqvy5GV9r45cz7 GETVclRlS0DvgGHvCXZrahgRBd7XwqX2b+lOLDH677sn2pm3y0DFkjc70quk8EZcLM/OuVbdk FXZLo7m+bmueU9cukOUrGQWr9dRVobc4Pz0AHyebtwVY+Kqn+1uPdgXGpZc11+7jyBNrjL3QA NLFGhJKH0G3YdJXBv5wqlcNRKHNEweyjpaEcR8T6SJS6TYoGhh//c7VFDEfz2pHAuw3Kmev+z WKTOXF8 Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org It is technically allowed, as per C89, for functions' return type to be complete structs (i.e. *not* just pointers to structs). However, it was just an oversight of this developer when converting Python code to C code in 6d297f8 (Status update on merge-recursive in C, 2006-07-08) which introduced such a return type. Besides, by converting this construct to pass in the struct, we can now start returning a value that can indicate errors in future patches. This will help the current effort to libify merge-recursive.c. Signed-off-by: Johannes Schindelin --- merge-recursive.c | 93 ++++++++++++++++++++++++++++++------------------------- 1 file changed, 50 insertions(+), 43 deletions(-) diff --git a/merge-recursive.c b/merge-recursive.c index 716488b..3e3667f 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -886,47 +886,47 @@ static int merge_3way(struct merge_options *o, return merge_status; } -static struct merge_file_info merge_file_1(struct merge_options *o, +static int merge_file_1(struct merge_options *o, const struct diff_filespec *one, const struct diff_filespec *a, const struct diff_filespec *b, const char *branch1, - const char *branch2) + const char *branch2, + struct merge_file_info *result) { - struct merge_file_info result; - result.merge = 0; - result.clean = 1; + result->merge = 0; + result->clean = 1; if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { - result.clean = 0; + result->clean = 0; if (S_ISREG(a->mode)) { - result.mode = a->mode; - hashcpy(result.sha, a->sha1); + result->mode = a->mode; + hashcpy(result->sha, a->sha1); } else { - result.mode = b->mode; - hashcpy(result.sha, b->sha1); + result->mode = b->mode; + hashcpy(result->sha, b->sha1); } } else { if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1)) - result.merge = 1; + result->merge = 1; /* * Merge modes */ if (a->mode == b->mode || a->mode == one->mode) - result.mode = b->mode; + result->mode = b->mode; else { - result.mode = a->mode; + result->mode = a->mode; if (b->mode != one->mode) { - result.clean = 0; - result.merge = 1; + result->clean = 0; + result->merge = 1; } } if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1)) - hashcpy(result.sha, b->sha1); + hashcpy(result->sha, b->sha1); else if (sha_eq(b->sha1, one->sha1)) - hashcpy(result.sha, a->sha1); + hashcpy(result->sha, a->sha1); else if (S_ISREG(a->mode)) { mmbuffer_t result_buf; int merge_status; @@ -938,62 +938,63 @@ static struct merge_file_info merge_file_1(struct merge_options *o, die(_("Failed to execute internal merge")); if (write_sha1_file(result_buf.ptr, result_buf.size, - blob_type, result.sha)) + blob_type, result->sha)) die(_("Unable to add %s to database"), a->path); free(result_buf.ptr); - result.clean = (merge_status == 0); + result->clean = (merge_status == 0); } else if (S_ISGITLINK(a->mode)) { - result.clean = merge_submodule(result.sha, + result->clean = merge_submodule(result->sha, one->path, one->sha1, a->sha1, b->sha1, !o->call_depth); } else if (S_ISLNK(a->mode)) { - hashcpy(result.sha, a->sha1); + hashcpy(result->sha, a->sha1); if (!sha_eq(a->sha1, b->sha1)) - result.clean = 0; + result->clean = 0; } else die("BUG: unsupported object type in the tree"); } - return result; + return 0; } -static struct merge_file_info -merge_file_special_markers(struct merge_options *o, +static int merge_file_special_markers(struct merge_options *o, const struct diff_filespec *one, const struct diff_filespec *a, const struct diff_filespec *b, const char *branch1, const char *filename1, const char *branch2, - const char *filename2) + const char *filename2, + struct merge_file_info *mfi) { char *side1 = NULL; char *side2 = NULL; - struct merge_file_info mfi; + int ret; if (filename1) side1 = xstrfmt("%s:%s", branch1, filename1); if (filename2) side2 = xstrfmt("%s:%s", branch2, filename2); - mfi = merge_file_1(o, one, a, b, - side1 ? side1 : branch1, side2 ? side2 : branch2); + ret = merge_file_1(o, one, a, b, + side1 ? side1 : branch1, side2 ? side2 : branch2, mfi); free(side1); free(side2); - return mfi; + return ret; } -static struct merge_file_info merge_file_one(struct merge_options *o, +static int merge_file_one(struct merge_options *o, const char *path, const unsigned char *o_sha, int o_mode, const unsigned char *a_sha, int a_mode, const unsigned char *b_sha, int b_mode, const char *branch1, - const char *branch2) + const char *branch2, + struct merge_file_info *mfi) { struct diff_filespec one, a, b; @@ -1004,7 +1005,7 @@ static struct merge_file_info merge_file_one(struct merge_options *o, a.mode = a_mode; hashcpy(b.sha1, b_sha); b.mode = b_mode; - return merge_file_1(o, &one, &a, &b, branch1, branch2); + return merge_file_1(o, &one, &a, &b, branch1, branch2, mfi); } static void handle_change_delete(struct merge_options *o, @@ -1177,11 +1178,14 @@ static void conflict_rename_rename_1to2(struct merge_options *o, struct merge_file_info mfi; struct diff_filespec other; struct diff_filespec *add; - mfi = merge_file_one(o, one->path, + + if (merge_file_one(o, one->path, one->sha1, one->mode, a->sha1, a->mode, b->sha1, b->mode, - ci->branch1, ci->branch2); + ci->branch1, ci->branch2, &mfi)) + return; + /* * FIXME: For rename/add-source conflicts (if we could detect * such), this is wrong. We should instead find a unique @@ -1235,12 +1239,13 @@ static void conflict_rename_rename_2to1(struct merge_options *o, remove_file(o, 1, a->path, o->call_depth || would_lose_untracked(a->path)); remove_file(o, 1, b->path, o->call_depth || would_lose_untracked(b->path)); - mfi_c1 = merge_file_special_markers(o, a, c1, &ci->ren1_other, + if (merge_file_special_markers(o, a, c1, &ci->ren1_other, o->branch1, c1->path, - o->branch2, ci->ren1_other.path); - mfi_c2 = merge_file_special_markers(o, b, &ci->ren2_other, c2, + o->branch2, ci->ren1_other.path, &mfi_c1) || + merge_file_special_markers(o, b, &ci->ren2_other, c2, o->branch1, ci->ren2_other.path, - o->branch2, c2->path); + o->branch2, c2->path, &mfi_c2)) + return; if (o->call_depth) { /* @@ -1461,10 +1466,11 @@ static int process_renames(struct merge_options *o, ren1_dst, branch2); if (o->call_depth) { struct merge_file_info mfi; - mfi = merge_file_one(o, ren1_dst, null_sha1, 0, + if (merge_file_one(o, ren1_dst, null_sha1, 0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_other.sha1, dst_other.mode, - branch1, branch2); + branch1, branch2, &mfi)) + return -1; output(o, 1, _("Adding merged %s"), ren1_dst); update_file(o, 0, mfi.sha, mfi.mode, ren1_dst); try_merge = 0; @@ -1620,9 +1626,10 @@ static int merge_content(struct merge_options *o, if (dir_in_way(path, !o->call_depth)) df_conflict_remains = 1; } - mfi = merge_file_special_markers(o, &one, &a, &b, + if (merge_file_special_markers(o, &one, &a, &b, o->branch1, path1, - o->branch2, path2); + o->branch2, path2, &mfi)) + return -1; if (mfi.clean && !df_conflict_remains && sha_eq(mfi.sha, a_sha) && mfi.mode == a_mode) { -- 2.9.0.280.g32e2a70