1 74b37681 2019-02-07 stsp /* $OpenBSD: diff3.c,v 1.41 2016/10/18 21:06:52 millert Exp $ */
4 74b37681 2019-02-07 stsp * Copyright (C) Caldera International Inc. 2001-2002.
5 74b37681 2019-02-07 stsp * All rights reserved.
7 74b37681 2019-02-07 stsp * Redistribution and use in source and binary forms, with or without
8 74b37681 2019-02-07 stsp * modification, are permitted provided that the following conditions
10 74b37681 2019-02-07 stsp * 1. Redistributions of source code and documentation must retain the above
11 74b37681 2019-02-07 stsp * copyright notice, this list of conditions and the following disclaimer.
12 74b37681 2019-02-07 stsp * 2. Redistributions in binary form must reproduce the above copyright
13 74b37681 2019-02-07 stsp * notice, this list of conditions and the following disclaimer in the
14 74b37681 2019-02-07 stsp * documentation and/or other materials provided with the distribution.
15 74b37681 2019-02-07 stsp * 3. All advertising materials mentioning features or use of this software
16 74b37681 2019-02-07 stsp * must display the following acknowledgement:
17 74b37681 2019-02-07 stsp * This product includes software developed or owned by Caldera
18 74b37681 2019-02-07 stsp * International, Inc.
19 74b37681 2019-02-07 stsp * 4. Neither the name of Caldera International, Inc. nor the names of other
20 74b37681 2019-02-07 stsp * contributors may be used to endorse or promote products derived from
21 74b37681 2019-02-07 stsp * this software without specific prior written permission.
23 74b37681 2019-02-07 stsp * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
24 74b37681 2019-02-07 stsp * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
25 74b37681 2019-02-07 stsp * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26 74b37681 2019-02-07 stsp * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 74b37681 2019-02-07 stsp * IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE FOR ANY DIRECT,
28 74b37681 2019-02-07 stsp * INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 74b37681 2019-02-07 stsp * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 74b37681 2019-02-07 stsp * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 74b37681 2019-02-07 stsp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
32 74b37681 2019-02-07 stsp * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
33 74b37681 2019-02-07 stsp * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 74b37681 2019-02-07 stsp * POSSIBILITY OF SUCH DAMAGE.
37 74b37681 2019-02-07 stsp * Copyright (c) 1991, 1993
38 74b37681 2019-02-07 stsp * The Regents of the University of California. All rights reserved.
40 74b37681 2019-02-07 stsp * Redistribution and use in source and binary forms, with or without
41 74b37681 2019-02-07 stsp * modification, are permitted provided that the following conditions
43 74b37681 2019-02-07 stsp * 1. Redistributions of source code must retain the above copyright
44 74b37681 2019-02-07 stsp * notice, this list of conditions and the following disclaimer.
45 74b37681 2019-02-07 stsp * 2. Redistributions in binary form must reproduce the above copyright
46 74b37681 2019-02-07 stsp * notice, this list of conditions and the following disclaimer in the
47 74b37681 2019-02-07 stsp * documentation and/or other materials provided with the distribution.
48 74b37681 2019-02-07 stsp * 3. Neither the name of the University nor the names of its contributors
49 74b37681 2019-02-07 stsp * may be used to endorse or promote products derived from this software
50 74b37681 2019-02-07 stsp * without specific prior written permission.
52 74b37681 2019-02-07 stsp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 74b37681 2019-02-07 stsp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 74b37681 2019-02-07 stsp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 74b37681 2019-02-07 stsp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 74b37681 2019-02-07 stsp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 74b37681 2019-02-07 stsp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 74b37681 2019-02-07 stsp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 74b37681 2019-02-07 stsp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 74b37681 2019-02-07 stsp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 74b37681 2019-02-07 stsp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 74b37681 2019-02-07 stsp * SUCH DAMAGE.
64 74b37681 2019-02-07 stsp * @(#)diff3.c 8.1 (Berkeley) 6/6/93
67 c03c6cb3 2019-02-08 stsp #include <sys/stat.h>
68 c03c6cb3 2019-02-08 stsp #include <sys/queue.h>
70 74b37681 2019-02-07 stsp #include <ctype.h>
71 c03c6cb3 2019-02-08 stsp #include <limits.h>
72 74b37681 2019-02-07 stsp #include <stdio.h>
73 c03c6cb3 2019-02-08 stsp #include <stdarg.h>
74 74b37681 2019-02-07 stsp #include <stdlib.h>
75 74b37681 2019-02-07 stsp #include <string.h>
76 74b37681 2019-02-07 stsp #include <time.h>
77 74b37681 2019-02-07 stsp #include <unistd.h>
79 c03c6cb3 2019-02-08 stsp #include "got_error.h"
80 c03c6cb3 2019-02-08 stsp #include "got_opentemp.h"
81 c03c6cb3 2019-02-08 stsp #include "got_object.h"
83 c03c6cb3 2019-02-08 stsp #include "buf.h"
84 c03c6cb3 2019-02-08 stsp #include "rcsutil.h"
85 c03c6cb3 2019-02-08 stsp #include "got_lib_diff.h"
86 c03c6cb3 2019-02-08 stsp #include "worklist.h"
88 0d26ce36 2019-02-08 stsp #ifndef nitems
89 0d26ce36 2019-02-08 stsp #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
92 74b37681 2019-02-07 stsp /* diff3 - 3-way differential file comparison */
94 74b37681 2019-02-07 stsp /* diff3 [-ex3EX] d13 d23 f1 f2 f3 [m1 m3]
96 74b37681 2019-02-07 stsp * d13 = diff report on f1 vs f3
97 74b37681 2019-02-07 stsp * d23 = diff report on f2 vs f3
98 74b37681 2019-02-07 stsp * f1, f2, f3 the 3 files
99 74b37681 2019-02-07 stsp * if changes in f1 overlap with changes in f3, m1 and m3 are used
100 74b37681 2019-02-07 stsp * to mark the overlaps; otherwise, the file names f1 and f3 are used
101 74b37681 2019-02-07 stsp * (only for options E and X).
105 74b37681 2019-02-07 stsp * "from" is first in range of changed lines; "to" is last+1
106 74b37681 2019-02-07 stsp * from=to=line after point of insertion for added lines.
108 74b37681 2019-02-07 stsp struct range {
113 74b37681 2019-02-07 stsp struct diff {
114 74b37681 2019-02-07 stsp struct range old;
115 74b37681 2019-02-07 stsp struct range new;
118 078e971d 2019-02-08 stsp struct diff3_state {
119 078e971d 2019-02-08 stsp size_t szchanges;
121 078e971d 2019-02-08 stsp struct diff *d13;
122 078e971d 2019-02-08 stsp struct diff *d23;
125 078e971d 2019-02-08 stsp * "de" is used to gather editing scripts. These are later spewed out
126 078e971d 2019-02-08 stsp * in reverse order. Its first element must be all zero, the "new"
127 078e971d 2019-02-08 stsp * component of "de" contains line positions or byte positions
128 078e971d 2019-02-08 stsp * depending on when you look (!?). Array overlap indicates which
129 078e971d 2019-02-08 stsp * sections in "de" correspond to lines that are different in all
130 078e971d 2019-02-08 stsp * three files.
132 078e971d 2019-02-08 stsp struct diff *de;
133 078e971d 2019-02-08 stsp char *overlap;
134 078e971d 2019-02-08 stsp int overlapcnt;
135 078e971d 2019-02-08 stsp FILE *fp[3];
136 078e971d 2019-02-08 stsp int cline[3]; /* # of the last-read line in each file (0-2) */
139 078e971d 2019-02-08 stsp * the latest known correspondence between line numbers of the 3 files
140 078e971d 2019-02-08 stsp * is stored in last[1-3];
142 078e971d 2019-02-08 stsp int last[4];
143 078e971d 2019-02-08 stsp char f1mark[PATH_MAX], f3mark[PATH_MAX]; /* markers for -E and -X */
147 5176f942 2019-02-08 stsp BUF *diffbuf;
151 180dce26 2019-10-06 stsp static const struct got_error *duplicate(int *, struct range *, struct range *,
152 180dce26 2019-10-06 stsp struct diff3_state *);
153 02b87977 2019-10-06 stsp static const struct got_error *edit(struct diff *, int, int *,
154 02b87977 2019-10-06 stsp struct diff3_state *);
155 02b87977 2019-10-06 stsp static const struct got_error *getchange(char **, FILE *, struct diff3_state *);
156 02b87977 2019-10-06 stsp static const struct got_error *get_line(char **, FILE *, size_t *,
157 02b87977 2019-10-06 stsp struct diff3_state *);
158 74b37681 2019-02-07 stsp static int number(char **);
159 b90524b1 2019-02-08 stsp static const struct got_error *readin(size_t *, char *, struct diff **,
160 b90524b1 2019-02-08 stsp struct diff3_state *);
161 c03c6cb3 2019-02-08 stsp static int ed_patch_lines(struct rcs_lines *, struct rcs_lines *);
162 50351dee 2019-10-09 stsp static const struct got_error *skip(int *, int, int, struct diff3_state *);
163 180dce26 2019-10-06 stsp static const struct got_error *edscript(int, struct diff3_state *);
164 180dce26 2019-10-06 stsp static const struct got_error *merge(size_t, size_t, struct diff3_state *);
165 ce09ab8d 2019-10-06 stsp static const struct got_error *prange(struct range *, struct diff3_state *);
166 f571bb85 2019-10-06 stsp static const struct got_error *repos(int, struct diff3_state *);
167 078e971d 2019-02-08 stsp static const struct got_error *increase(struct diff3_state *);
168 c03c6cb3 2019-02-08 stsp static const struct got_error *diff3_internal(char *, char *, char *,
169 a551f215 2019-02-08 stsp char *, char *, const char *, const char *, struct diff3_state *,
170 a551f215 2019-02-08 stsp const char *, const char *);
172 c03c6cb3 2019-02-08 stsp static const struct got_error *
173 5176f942 2019-02-08 stsp diff_output(BUF *diffbuf, const char *fmt, ...)
175 346b301a 2019-10-06 stsp const struct got_error *err = NULL;
176 c03c6cb3 2019-02-08 stsp va_list vap;
179 c03c6cb3 2019-02-08 stsp size_t newsize;
181 c03c6cb3 2019-02-08 stsp va_start(vap, fmt);
182 c03c6cb3 2019-02-08 stsp i = vasprintf(&str, fmt, vap);
183 c03c6cb3 2019-02-08 stsp va_end(vap);
184 c03c6cb3 2019-02-08 stsp if (i == -1)
185 638f9024 2019-05-13 stsp return got_error_from_errno("vasprintf");
186 346b301a 2019-10-06 stsp err = buf_append(&newsize, diffbuf, str, strlen(str));
188 346b301a 2019-10-06 stsp return err;
191 c03c6cb3 2019-02-08 stsp static const struct got_error*
192 c03c6cb3 2019-02-08 stsp diffreg(BUF **d, const char *path1, const char *path2)
194 c03c6cb3 2019-02-08 stsp const struct got_error *err = NULL;
195 c03c6cb3 2019-02-08 stsp FILE *f1 = NULL, *f2 = NULL, *outfile = NULL;
196 c03c6cb3 2019-02-08 stsp char *outpath = NULL;
197 c03c6cb3 2019-02-08 stsp struct got_diff_state ds;
198 c03c6cb3 2019-02-08 stsp struct got_diff_args args;
203 c03c6cb3 2019-02-08 stsp f1 = fopen(path1, "r");
204 c03c6cb3 2019-02-08 stsp if (f1 == NULL) {
205 638f9024 2019-05-13 stsp err = got_error_from_errno2("fopen", path1);
208 c03c6cb3 2019-02-08 stsp f2 = fopen(path2, "r");
209 c03c6cb3 2019-02-08 stsp if (f1 == NULL) {
210 638f9024 2019-05-13 stsp err = got_error_from_errno2("fopen", path2);
214 a551f215 2019-02-08 stsp err = got_opentemp_named(&outpath, &outfile, "/tmp/got-diffreg");
218 c03c6cb3 2019-02-08 stsp memset(&ds, 0, sizeof(ds));
219 c03c6cb3 2019-02-08 stsp /* XXX should stat buffers be passed in args instead of ds? */
220 c03c6cb3 2019-02-08 stsp if (stat(path1, &ds.stb1) == -1) {
221 638f9024 2019-05-13 stsp err = got_error_from_errno2("stat", path1);
224 c03c6cb3 2019-02-08 stsp if (stat(path2, &ds.stb2) == -1) {
225 638f9024 2019-05-13 stsp err = got_error_from_errno2("stat", path2);
229 c03c6cb3 2019-02-08 stsp memset(&args, 0, sizeof(args));
230 c03c6cb3 2019-02-08 stsp args.diff_format = D_NORMAL;
231 c03c6cb3 2019-02-08 stsp args.label[0] = "";
232 c03c6cb3 2019-02-08 stsp args.label[1] = "";
233 c03c6cb3 2019-02-08 stsp args.diff_context = 0;
235 c03c6cb3 2019-02-08 stsp err = got_diffreg(&res, f1, f2, D_FORCEASCII, &args, &ds,
236 c03c6cb3 2019-02-08 stsp outfile, NULL);
240 cbe7f848 2019-02-11 stsp if (fflush(outfile) != 0) {
241 638f9024 2019-05-13 stsp err = got_error_from_errno2("fflush", outpath);
245 575e8218 2019-10-07 stsp err = buf_load(d, outpath);
247 a551f215 2019-02-08 stsp if (outpath) {
248 a551f215 2019-02-08 stsp unlink(outpath);
249 a551f215 2019-02-08 stsp free(outpath);
251 fb43ecf1 2019-02-11 stsp if (outfile && fclose(outfile) != 0 && err == NULL)
252 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
253 fb43ecf1 2019-02-11 stsp if (f1 && fclose(f1) != 0 && err == NULL)
254 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
255 fb43ecf1 2019-02-11 stsp if (f2 && fclose(f2) != 0 && err == NULL)
256 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
257 c03c6cb3 2019-02-08 stsp return err;
261 74b37681 2019-02-07 stsp * For merge(1).
263 c03c6cb3 2019-02-08 stsp const struct got_error *
264 57ee5d50 2019-02-08 stsp got_merge_diff3(int *overlapcnt, int outfd, const char *p1, const char *p2,
265 57ee5d50 2019-02-08 stsp const char *p3, const char *label1, const char *label3)
267 c03c6cb3 2019-02-08 stsp const struct got_error *err = NULL;
268 c03c6cb3 2019-02-08 stsp char *dp13, *dp23, *path1, *path2, *path3;
269 74b37681 2019-02-07 stsp BUF *b1, *b2, *b3, *d1, *d2, *diffb;
270 74b37681 2019-02-07 stsp u_char *data, *patch;
271 74b37681 2019-02-07 stsp size_t dlen, plen;
272 c03c6cb3 2019-02-08 stsp struct wklhead temp_files;
273 078e971d 2019-02-08 stsp struct diff3_state *d3s;
276 57ee5d50 2019-02-08 stsp *overlapcnt = 0;
278 5d731149 2019-02-08 stsp SLIST_INIT(&temp_files);
280 078e971d 2019-02-08 stsp d3s = calloc(1, sizeof(*d3s));
281 078e971d 2019-02-08 stsp if (d3s == NULL)
282 638f9024 2019-05-13 stsp return got_error_from_errno("calloc");
284 74b37681 2019-02-07 stsp b1 = b2 = b3 = d1 = d2 = diffb = NULL;
285 74b37681 2019-02-07 stsp dp13 = dp23 = path1 = path2 = path3 = NULL;
286 74b37681 2019-02-07 stsp data = patch = NULL;
288 575e8218 2019-10-07 stsp err = buf_load(&b1, p1);
291 575e8218 2019-10-07 stsp err = buf_load(&b2, p2);
294 575e8218 2019-10-07 stsp err = buf_load(&b3, p3);
298 575e8218 2019-10-07 stsp err = buf_alloc(&diffb, 128);
302 c03c6cb3 2019-02-08 stsp if (asprintf(&path1, "/tmp/got-diff1.XXXXXXXX") == -1) {
303 638f9024 2019-05-13 stsp err = got_error_from_errno("asprintf");
306 c03c6cb3 2019-02-08 stsp if (asprintf(&path2, "/tmp/got-diff2.XXXXXXXX") == -1) {
307 638f9024 2019-05-13 stsp err = got_error_from_errno("asprintf");
310 c03c6cb3 2019-02-08 stsp if (asprintf(&path3, "/tmp/got-diff3.XXXXXXXX") == -1) {
311 638f9024 2019-05-13 stsp err = got_error_from_errno("asprintf");
315 c03c6cb3 2019-02-08 stsp err = buf_write_stmp(b1, path1, &temp_files);
318 c03c6cb3 2019-02-08 stsp err = buf_write_stmp(b2, path2, &temp_files);
321 c03c6cb3 2019-02-08 stsp err = buf_write_stmp(b3, path3, &temp_files);
325 74b37681 2019-02-07 stsp buf_free(b2);
328 c03c6cb3 2019-02-08 stsp err = diffreg(&d1, path1, path3);
330 74b37681 2019-02-07 stsp buf_free(diffb);
331 74b37681 2019-02-07 stsp diffb = NULL;
335 c03c6cb3 2019-02-08 stsp err = diffreg(&d2, path2, path3);
337 c03c6cb3 2019-02-08 stsp buf_free(diffb);
338 c03c6cb3 2019-02-08 stsp diffb = NULL;
342 c03c6cb3 2019-02-08 stsp if (asprintf(&dp13, "/tmp/got-d13.XXXXXXXXXX") == -1) {
343 638f9024 2019-05-13 stsp err = got_error_from_errno("asprintf");
346 c03c6cb3 2019-02-08 stsp err = buf_write_stmp(d1, dp13, &temp_files);
350 74b37681 2019-02-07 stsp buf_free(d1);
353 c03c6cb3 2019-02-08 stsp if (asprintf(&dp23, "/tmp/got-d23.XXXXXXXXXX") == -1) {
354 638f9024 2019-05-13 stsp err = got_error_from_errno("asprintf");
357 c03c6cb3 2019-02-08 stsp err = buf_write_stmp(d2, dp23, &temp_files);
361 74b37681 2019-02-07 stsp buf_free(d2);
364 5176f942 2019-02-08 stsp d3s->diffbuf = diffb;
365 a551f215 2019-02-08 stsp err = diff3_internal(dp13, dp23, path1, path2, path3,
366 a551f215 2019-02-08 stsp label1, label3, d3s, label1, label3);
368 74b37681 2019-02-07 stsp buf_free(diffb);
369 74b37681 2019-02-07 stsp diffb = NULL;
373 74b37681 2019-02-07 stsp plen = buf_len(diffb);
374 74b37681 2019-02-07 stsp patch = buf_release(diffb);
375 74b37681 2019-02-07 stsp dlen = buf_len(b1);
376 74b37681 2019-02-07 stsp data = buf_release(b1);
378 5a3ad9e0 2019-02-08 stsp diffb = rcs_patchfile(data, dlen, patch, plen, ed_patch_lines);
380 74b37681 2019-02-07 stsp buf_free(b2);
381 74b37681 2019-02-07 stsp buf_free(b3);
382 74b37681 2019-02-07 stsp buf_free(d1);
383 74b37681 2019-02-07 stsp buf_free(d2);
385 74b37681 2019-02-07 stsp (void)unlink(path1);
386 74b37681 2019-02-07 stsp (void)unlink(path2);
387 74b37681 2019-02-07 stsp (void)unlink(path3);
388 74b37681 2019-02-07 stsp (void)unlink(dp13);
389 74b37681 2019-02-07 stsp (void)unlink(dp23);
391 74b37681 2019-02-07 stsp free(path1);
392 74b37681 2019-02-07 stsp free(path2);
393 74b37681 2019-02-07 stsp free(path3);
394 74b37681 2019-02-07 stsp free(dp13);
395 74b37681 2019-02-07 stsp free(dp23);
396 74b37681 2019-02-07 stsp free(data);
397 74b37681 2019-02-07 stsp free(patch);
399 c03c6cb3 2019-02-08 stsp worklist_clean(&temp_files, worklist_unlink);
401 0d26ce36 2019-02-08 stsp for (i = 0; i < nitems(d3s->fp); i++) {
402 fb43ecf1 2019-02-11 stsp if (d3s->fp[i] && fclose(d3s->fp[i]) != 0 && err == NULL)
403 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
405 5a3ad9e0 2019-02-08 stsp if (err == NULL && diffb) {
406 62f59172 2019-02-08 stsp if (buf_write_fd(diffb, outfd) < 0)
407 638f9024 2019-05-13 stsp err = got_error_from_errno("buf_write_fd");
408 57ee5d50 2019-02-08 stsp *overlapcnt = d3s->overlapcnt;
411 62f59172 2019-02-08 stsp buf_free(diffb);
412 c03c6cb3 2019-02-08 stsp return err;
415 c03c6cb3 2019-02-08 stsp static const struct got_error *
416 c03c6cb3 2019-02-08 stsp diff3_internal(char *dp13, char *dp23, char *path1, char *path2, char *path3,
417 a551f215 2019-02-08 stsp const char *fmark, const char *rmark, struct diff3_state *d3s,
418 a551f215 2019-02-08 stsp const char *label1, const char *label3)
420 c03c6cb3 2019-02-08 stsp const struct got_error *err = NULL;
421 74b37681 2019-02-07 stsp ssize_t m, n;
424 01a44956 2019-03-27 stsp i = snprintf(d3s->f1mark, sizeof(d3s->f1mark),
425 01a44956 2019-03-27 stsp "%s %s", GOT_DIFF_CONFLICT_MARKER_BEGIN, label1);
426 078e971d 2019-02-08 stsp if (i < 0 || i >= (int)sizeof(d3s->f1mark))
427 c03c6cb3 2019-02-08 stsp return got_error(GOT_ERR_NO_SPACE);
429 01a44956 2019-03-27 stsp i = snprintf(d3s->f3mark, sizeof(d3s->f3mark),
430 01a44956 2019-03-27 stsp "%s %s", GOT_DIFF_CONFLICT_MARKER_END, label3);
431 078e971d 2019-02-08 stsp if (i < 0 || i >= (int)sizeof(d3s->f3mark))
432 c03c6cb3 2019-02-08 stsp return got_error(GOT_ERR_NO_SPACE);
434 078e971d 2019-02-08 stsp err = increase(d3s);
436 c03c6cb3 2019-02-08 stsp return err;
438 b90524b1 2019-02-08 stsp err = readin(&m, dp13, &d3s->d13, d3s);
440 b90524b1 2019-02-08 stsp return err;
441 b90524b1 2019-02-08 stsp err = readin(&n, dp23, &d3s->d23, d3s);
443 b90524b1 2019-02-08 stsp return err;
445 078e971d 2019-02-08 stsp if ((d3s->fp[0] = fopen(path1, "r")) == NULL)
446 638f9024 2019-05-13 stsp return got_error_from_errno2("fopen", path1);
447 078e971d 2019-02-08 stsp if ((d3s->fp[1] = fopen(path2, "r")) == NULL)
448 638f9024 2019-05-13 stsp return got_error_from_errno2("fopen", path2);
449 078e971d 2019-02-08 stsp if ((d3s->fp[2] = fopen(path3, "r")) == NULL)
450 638f9024 2019-05-13 stsp return got_error_from_errno2("fopen", path3);
452 180dce26 2019-10-06 stsp return merge(m, n, d3s);
456 74b37681 2019-02-07 stsp ed_patch_lines(struct rcs_lines *dlines, struct rcs_lines *plines)
458 74b37681 2019-02-07 stsp char op, *ep;
459 74b37681 2019-02-07 stsp struct rcs_line *sort, *lp, *dlp, *ndlp, *insert_after;
460 74b37681 2019-02-07 stsp int start, end, i, lineno;
461 74b37681 2019-02-07 stsp u_char tmp;
463 74b37681 2019-02-07 stsp dlp = TAILQ_FIRST(&(dlines->l_lines));
464 74b37681 2019-02-07 stsp lp = TAILQ_FIRST(&(plines->l_lines));
467 74b37681 2019-02-07 stsp for (lp = TAILQ_NEXT(lp, l_list); lp != NULL;
468 74b37681 2019-02-07 stsp lp = TAILQ_NEXT(lp, l_list)) {
469 74b37681 2019-02-07 stsp /* Skip blank lines */
470 74b37681 2019-02-07 stsp if (lp->l_len < 2)
473 74b37681 2019-02-07 stsp /* NUL-terminate line buffer for strtol() safety. */
474 74b37681 2019-02-07 stsp tmp = lp->l_line[lp->l_len - 1];
475 74b37681 2019-02-07 stsp lp->l_line[lp->l_len - 1] = '\0';
477 74b37681 2019-02-07 stsp /* len - 1 is NUL terminator so we use len - 2 for 'op' */
478 74b37681 2019-02-07 stsp op = lp->l_line[lp->l_len - 2];
479 74b37681 2019-02-07 stsp start = (int)strtol(lp->l_line, &ep, 10);
481 74b37681 2019-02-07 stsp /* Restore the last byte of the buffer */
482 74b37681 2019-02-07 stsp lp->l_line[lp->l_len - 1] = tmp;
484 74b37681 2019-02-07 stsp if (op == 'a') {
485 74b37681 2019-02-07 stsp if (start > dlines->l_nblines ||
486 74b37681 2019-02-07 stsp start < 0 || *ep != 'a')
488 74b37681 2019-02-07 stsp } else if (op == 'c') {
489 74b37681 2019-02-07 stsp if (start > dlines->l_nblines ||
490 74b37681 2019-02-07 stsp start < 0 || (*ep != ',' && *ep != 'c'))
493 74b37681 2019-02-07 stsp if (*ep == ',') {
495 74b37681 2019-02-07 stsp end = (int)strtol(ep, &ep, 10);
496 74b37681 2019-02-07 stsp if (end < 0 || *ep != 'c')
499 74b37681 2019-02-07 stsp end = start;
505 74b37681 2019-02-07 stsp if (dlp == NULL)
507 74b37681 2019-02-07 stsp if (dlp->l_lineno == start)
509 74b37681 2019-02-07 stsp if (dlp->l_lineno > start) {
510 74b37681 2019-02-07 stsp dlp = TAILQ_PREV(dlp, tqh, l_list);
511 74b37681 2019-02-07 stsp } else if (dlp->l_lineno < start) {
512 74b37681 2019-02-07 stsp ndlp = TAILQ_NEXT(dlp, l_list);
513 74b37681 2019-02-07 stsp if (ndlp->l_lineno > start)
515 74b37681 2019-02-07 stsp dlp = ndlp;
519 74b37681 2019-02-07 stsp if (dlp == NULL)
523 74b37681 2019-02-07 stsp if (op == 'c') {
524 74b37681 2019-02-07 stsp insert_after = TAILQ_PREV(dlp, tqh, l_list);
525 74b37681 2019-02-07 stsp for (i = 0; i <= (end - start); i++) {
526 74b37681 2019-02-07 stsp ndlp = TAILQ_NEXT(dlp, l_list);
527 74b37681 2019-02-07 stsp TAILQ_REMOVE(&(dlines->l_lines), dlp, l_list);
528 74b37681 2019-02-07 stsp dlp = ndlp;
530 74b37681 2019-02-07 stsp dlp = insert_after;
533 74b37681 2019-02-07 stsp if (op == 'a' || op == 'c') {
536 74b37681 2019-02-07 stsp lp = TAILQ_NEXT(lp, l_list);
537 74b37681 2019-02-07 stsp if (lp == NULL)
540 acb4e1d1 2019-08-10 stsp if (lp->l_len == 2 &&
541 acb4e1d1 2019-08-10 stsp lp->l_line[0] == '.' &&
542 acb4e1d1 2019-08-10 stsp lp->l_line[1] == '\n')
545 74b37681 2019-02-07 stsp TAILQ_REMOVE(&(plines->l_lines), lp, l_list);
546 74b37681 2019-02-07 stsp TAILQ_INSERT_AFTER(&(dlines->l_lines), dlp,
547 74b37681 2019-02-07 stsp lp, l_list);
550 74b37681 2019-02-07 stsp lp->l_lineno = start;
556 74b37681 2019-02-07 stsp * always resort lines as the markers might be put at the
557 74b37681 2019-02-07 stsp * same line as we first started editing.
559 74b37681 2019-02-07 stsp lineno = 0;
560 74b37681 2019-02-07 stsp TAILQ_FOREACH(sort, &(dlines->l_lines), l_list)
561 74b37681 2019-02-07 stsp sort->l_lineno = lineno++;
562 74b37681 2019-02-07 stsp dlines->l_nblines = lineno - 1;
565 74b37681 2019-02-07 stsp return (0);
569 74b37681 2019-02-07 stsp * Pick up the line numbers of all changes from one change file.
570 74b37681 2019-02-07 stsp * (This puts the numbers in a vector, which is not strictly necessary,
571 74b37681 2019-02-07 stsp * since the vector is processed in one sequential pass.
572 74b37681 2019-02-07 stsp * The vector could be optimized out of existence)
574 b90524b1 2019-02-08 stsp static const struct got_error *
575 b90524b1 2019-02-08 stsp readin(size_t *n, char *name, struct diff **dd, struct diff3_state *d3s)
577 b90524b1 2019-02-08 stsp const struct got_error *err = NULL;
579 74b37681 2019-02-07 stsp int a, b, c, d;
580 74b37681 2019-02-07 stsp char kind, *p;
585 971405a7 2019-10-09 stsp f = fopen(name, "r");
586 971405a7 2019-10-09 stsp if (f == NULL)
587 638f9024 2019-05-13 stsp return got_error_from_errno2("fopen", name);
588 971405a7 2019-10-09 stsp err = getchange(&p, f, d3s);
591 02b87977 2019-10-06 stsp for (i = 0; p; i++) {
592 b90524b1 2019-02-08 stsp if (i >= d3s->szchanges - 1) {
593 b90524b1 2019-02-08 stsp err = increase(d3s);
597 74b37681 2019-02-07 stsp a = b = number(&p);
598 74b37681 2019-02-07 stsp if (*p == ',') {
600 74b37681 2019-02-07 stsp b = number(&p);
602 74b37681 2019-02-07 stsp kind = *p++;
603 74b37681 2019-02-07 stsp c = d = number(&p);
604 e19660d5 2019-10-06 stsp if (*p == ',') {
606 74b37681 2019-02-07 stsp d = number(&p);
608 74b37681 2019-02-07 stsp if (kind == 'a')
610 74b37681 2019-02-07 stsp if (kind == 'd')
614 74b37681 2019-02-07 stsp (*dd)[i].old.from = a;
615 74b37681 2019-02-07 stsp (*dd)[i].old.to = b;
616 74b37681 2019-02-07 stsp (*dd)[i].new.from = c;
617 74b37681 2019-02-07 stsp (*dd)[i].new.to = d;
619 971405a7 2019-10-09 stsp err = getchange(&p, f, d3s);
625 e19660d5 2019-10-06 stsp (*dd)[i].old.from = (*dd)[i - 1].old.to;
626 e19660d5 2019-10-06 stsp (*dd)[i].new.from = (*dd)[i - 1].new.to;
629 e4531130 2019-10-09 stsp if (fclose(f) != 0 && err == NULL)
630 638f9024 2019-05-13 stsp err = got_error_from_errno("fclose");
631 e4531130 2019-10-09 stsp if (err == NULL)
633 fb43ecf1 2019-02-11 stsp return err;
637 74b37681 2019-02-07 stsp number(char **lc)
642 74b37681 2019-02-07 stsp while (isdigit((unsigned char)(**lc)))
643 74b37681 2019-02-07 stsp nn = nn*10 + *(*lc)++ - '0';
645 74b37681 2019-02-07 stsp return (nn);
648 02b87977 2019-10-06 stsp static const struct got_error *
649 02b87977 2019-10-06 stsp getchange(char **line, FILE *b, struct diff3_state *d3s)
651 02b87977 2019-10-06 stsp const struct got_error *err = NULL;
653 02b87977 2019-10-06 stsp *line = NULL;
655 02b87977 2019-10-06 stsp if (*line && isdigit((unsigned char)(*line)[0]))
656 02b87977 2019-10-06 stsp return NULL;
657 02b87977 2019-10-06 stsp err = get_line(line, b, NULL, d3s);
659 02b87977 2019-10-06 stsp return err;
660 02b87977 2019-10-06 stsp } while (*line);
662 02b87977 2019-10-06 stsp return NULL;
665 02b87977 2019-10-06 stsp static const struct got_error *
666 02b87977 2019-10-06 stsp get_line(char **ret, FILE *b, size_t *n, struct diff3_state *d3s)
668 02b87977 2019-10-06 stsp const struct got_error *err = NULL;
669 6dea73df 2019-09-23 stsp char *cp = NULL;
670 500467ff 2019-09-25 hiltjo size_t size;
671 500467ff 2019-09-25 hiltjo ssize_t len;
674 02b87977 2019-10-06 stsp *ret = NULL;
676 6dea73df 2019-09-23 stsp len = getline(&cp, &size, b);
677 02b87977 2019-10-06 stsp if (len == -1) {
678 02b87977 2019-10-06 stsp if (ferror(b))
679 02b87977 2019-10-06 stsp err = got_error_from_errno("getline");
683 6dea73df 2019-09-23 stsp if (cp[len - 1] != '\n') {
685 6dea73df 2019-09-23 stsp if (len + 1 > size) {
686 6dea73df 2019-09-23 stsp new = realloc(cp, len + 1);
687 02b87977 2019-10-06 stsp if (new == NULL) {
688 02b87977 2019-10-06 stsp err = got_error_from_errno("realloc");
693 6dea73df 2019-09-23 stsp cp[len - 1] = '\n';
694 6dea73df 2019-09-23 stsp cp[len] = '\0';
697 6dea73df 2019-09-23 stsp free(d3s->buf);
698 02b87977 2019-10-06 stsp *ret = d3s->buf = cp;
700 74b37681 2019-02-07 stsp if (n != NULL)
704 02b87977 2019-10-06 stsp return err;
707 180dce26 2019-10-06 stsp static const struct got_error *
708 078e971d 2019-02-08 stsp merge(size_t m1, size_t m2, struct diff3_state *d3s)
710 180dce26 2019-10-06 stsp const struct got_error *err = NULL;
711 18b9ebab 2019-10-06 stsp struct diff *d1, *d2;
712 74b37681 2019-02-07 stsp int dpl, j, t1, t2;
714 078e971d 2019-02-08 stsp d1 = d3s->d13;
715 078e971d 2019-02-08 stsp d2 = d3s->d23;
718 078e971d 2019-02-08 stsp t1 = (d1 < d3s->d13 + m1);
719 078e971d 2019-02-08 stsp t2 = (d2 < d3s->d23 + m2);
720 74b37681 2019-02-07 stsp if (!t1 && !t2)
723 74b37681 2019-02-07 stsp /* first file is different from others */
724 74b37681 2019-02-07 stsp if (!t2 || (t1 && d1->new.to < d2->new.from)) {
725 74b37681 2019-02-07 stsp /* stuff peculiar to 1st file */
730 74b37681 2019-02-07 stsp /* second file is different from others */
731 74b37681 2019-02-07 stsp if (!t1 || (t2 && d2->new.to < d1->new.from)) {
737 74b37681 2019-02-07 stsp * Merge overlapping changes in first file
738 74b37681 2019-02-07 stsp * this happens after extension (see below).
740 078e971d 2019-02-08 stsp if (d1 + 1 < d3s->d13 + m1 && d1->new.to >= d1[1].new.from) {
741 74b37681 2019-02-07 stsp d1[1].old.from = d1->old.from;
742 74b37681 2019-02-07 stsp d1[1].new.from = d1->new.from;
747 74b37681 2019-02-07 stsp /* merge overlapping changes in second */
748 078e971d 2019-02-08 stsp if (d2 + 1 < d3s->d23 + m2 && d2->new.to >= d2[1].new.from) {
749 74b37681 2019-02-07 stsp d2[1].old.from = d2->old.from;
750 74b37681 2019-02-07 stsp d2[1].new.from = d2->new.from;
754 74b37681 2019-02-07 stsp /* stuff peculiar to third file or different in all */
755 74b37681 2019-02-07 stsp if (d1->new.from == d2->new.from && d1->new.to == d2->new.to) {
756 180dce26 2019-10-06 stsp err = duplicate(&dpl, &d1->old, &d2->old, d3s);
758 180dce26 2019-10-06 stsp return err;
761 74b37681 2019-02-07 stsp * dpl = 0 means all files differ
762 74b37681 2019-02-07 stsp * dpl = 1 means files 1 and 2 identical
764 18b9ebab 2019-10-06 stsp err = edit(d1, dpl, &j, d3s);
766 18b9ebab 2019-10-06 stsp return err;
773 74b37681 2019-02-07 stsp * Overlapping changes from file 1 and 2; extend changes
774 74b37681 2019-02-07 stsp * appropriately to make them coincide.
776 74b37681 2019-02-07 stsp if (d1->new.from < d2->new.from) {
777 e19660d5 2019-10-06 stsp d2->old.from -= d2->new.from - d1->new.from;
778 74b37681 2019-02-07 stsp d2->new.from = d1->new.from;
779 74b37681 2019-02-07 stsp } else if (d2->new.from < d1->new.from) {
780 e19660d5 2019-10-06 stsp d1->old.from -= d1->new.from - d2->new.from;
781 74b37681 2019-02-07 stsp d1->new.from = d2->new.from;
783 74b37681 2019-02-07 stsp if (d1->new.to > d2->new.to) {
784 74b37681 2019-02-07 stsp d2->old.to += d1->new.to - d2->new.to;
785 74b37681 2019-02-07 stsp d2->new.to = d1->new.to;
786 74b37681 2019-02-07 stsp } else if (d2->new.to > d1->new.to) {
787 74b37681 2019-02-07 stsp d1->old.to += d2->new.to - d1->new.to;
788 74b37681 2019-02-07 stsp d1->new.to = d2->new.to;
792 078e971d 2019-02-08 stsp return (edscript(j, d3s));
796 74b37681 2019-02-07 stsp * print the range of line numbers, rold.from thru rold.to, as n1,n2 or n1
798 ce09ab8d 2019-10-06 stsp static const struct got_error *
799 5176f942 2019-02-08 stsp prange(struct range *rold, struct diff3_state *d3s)
801 ce09ab8d 2019-10-06 stsp const struct got_error *err = NULL;
803 ce09ab8d 2019-10-06 stsp if (rold->to <= rold->from) {
804 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%da\n", rold->from - 1);
806 ce09ab8d 2019-10-06 stsp return err;
808 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%d", rold->from);
810 ce09ab8d 2019-10-06 stsp return err;
811 ce09ab8d 2019-10-06 stsp if (rold->to > rold->from + 1) {
812 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, ",%d", rold->to - 1);
814 ce09ab8d 2019-10-06 stsp return err;
816 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "c\n");
818 ce09ab8d 2019-10-06 stsp return err;
821 ce09ab8d 2019-10-06 stsp return NULL;
824 50351dee 2019-10-09 stsp /* skip to just before line number from in file "i". */
825 02b87977 2019-10-06 stsp static const struct got_error *
826 50351dee 2019-10-09 stsp skip(int *nskipped, int i, int from, struct diff3_state *d3s)
828 02b87977 2019-10-06 stsp const struct got_error *err = NULL;
829 74b37681 2019-02-07 stsp size_t j, n;
830 74b37681 2019-02-07 stsp char *line;
832 02b87977 2019-10-06 stsp *nskipped = 0;
833 078e971d 2019-02-08 stsp for (n = 0; d3s->cline[i] < from - 1; n += j) {
834 02b87977 2019-10-06 stsp err = get_line(&line, d3s->fp[i], &j, d3s);
836 02b87977 2019-10-06 stsp return err;
837 078e971d 2019-02-08 stsp d3s->cline[i]++;
839 02b87977 2019-10-06 stsp *nskipped = n;
840 02b87977 2019-10-06 stsp return NULL;
844 180dce26 2019-10-06 stsp * Set *dpl to 1 or 0 according as the old range (in file 1) contains exactly
845 74b37681 2019-02-07 stsp * the same data as the new range (in file 2).
847 180dce26 2019-10-06 stsp static const struct got_error *
848 180dce26 2019-10-06 stsp duplicate(int *dpl, struct range *r1, struct range *r2, struct diff3_state *d3s)
850 f571bb85 2019-10-06 stsp const struct got_error *err = NULL;
853 02b87977 2019-10-06 stsp int nline, nskipped;
857 e19660d5 2019-10-06 stsp if (r1->to - r1->from != r2->to - r2->from)
858 180dce26 2019-10-06 stsp return NULL;
860 50351dee 2019-10-09 stsp err = skip(&nskipped, 0, r1->from, d3s);
862 02b87977 2019-10-06 stsp return err;
863 50351dee 2019-10-09 stsp err = skip(&nskipped, 1, r2->from, d3s);
865 02b87977 2019-10-06 stsp return err;
867 e19660d5 2019-10-06 stsp for (nline = 0; nline < r1->to - r1->from; nline++) {
869 078e971d 2019-02-08 stsp c = getc(d3s->fp[0]);
870 180dce26 2019-10-06 stsp if (c == EOF)
871 180dce26 2019-10-06 stsp return got_ferror(d3s->fp[0], GOT_ERR_EOF);
872 078e971d 2019-02-08 stsp d = getc(d3s->fp[1]);
873 180dce26 2019-10-06 stsp if (d == EOF)
874 180dce26 2019-10-06 stsp return got_ferror(d3s->fp[1], GOT_ERR_EOF);
876 f571bb85 2019-10-06 stsp if (c != d)
877 f571bb85 2019-10-06 stsp return repos(nchar, d3s);
878 74b37681 2019-02-07 stsp } while (c != '\n');
880 f571bb85 2019-10-06 stsp err = repos(nchar, d3s);
882 f571bb85 2019-10-06 stsp return err;
884 180dce26 2019-10-06 stsp return NULL;
887 f571bb85 2019-10-06 stsp static const struct got_error *
888 078e971d 2019-02-08 stsp repos(int nchar, struct diff3_state *d3s)
892 f571bb85 2019-10-06 stsp for (i = 0; i < 2; i++) {
893 f571bb85 2019-10-06 stsp if (fseek(d3s->fp[i], (long)-nchar, SEEK_CUR) == -1)
894 f571bb85 2019-10-06 stsp return got_ferror(d3s->fp[i], GOT_ERR_IO);
897 f571bb85 2019-10-06 stsp return NULL;
901 74b37681 2019-02-07 stsp * collect an editing script for later regurgitation
903 02b87977 2019-10-06 stsp static const struct got_error *
904 02b87977 2019-10-06 stsp edit(struct diff *diff, int fdup, int *j, struct diff3_state *d3s)
906 02b87977 2019-10-06 stsp const struct got_error *err = NULL;
907 02b87977 2019-10-06 stsp int nskipped;
909 18b9ebab 2019-10-06 stsp if (((fdup + 1) & 3) == 0)
910 02b87977 2019-10-06 stsp return NULL;
912 02b87977 2019-10-06 stsp d3s->overlap[*j] = !fdup;
914 078e971d 2019-02-08 stsp d3s->overlapcnt++;
915 02b87977 2019-10-06 stsp d3s->de[*j].old.from = diff->old.from;
916 02b87977 2019-10-06 stsp d3s->de[*j].old.to = diff->old.to;
917 50351dee 2019-10-09 stsp err = skip(&nskipped, 2, diff->new.from, d3s);
919 02b87977 2019-10-06 stsp return err;
920 e19660d5 2019-10-06 stsp d3s->de[*j].new.from = d3s->de[*j - 1].new.to + nskipped;
921 50351dee 2019-10-09 stsp err = skip(&nskipped, 2, diff->new.to, d3s);
922 e19660d5 2019-10-06 stsp d3s->de[*j].new.to = d3s->de[*j].new.from + nskipped;
923 02b87977 2019-10-06 stsp return NULL;
926 74b37681 2019-02-07 stsp /* regurgitate */
927 180dce26 2019-10-06 stsp static const struct got_error *
928 078e971d 2019-02-08 stsp edscript(int n, struct diff3_state *d3s)
930 ce09ab8d 2019-10-06 stsp const struct got_error *err = NULL;
932 74b37681 2019-02-07 stsp char block[BUFSIZ+1];
934 74b37681 2019-02-07 stsp for (; n > 0; n--) {
935 ce09ab8d 2019-10-06 stsp if (!d3s->overlap[n]) {
936 ce09ab8d 2019-10-06 stsp err = prange(&d3s->de[n].old, d3s);
938 ce09ab8d 2019-10-06 stsp return err;
940 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%da\n%s\n",
941 01a44956 2019-03-27 stsp d3s->de[n].old.to -1, GOT_DIFF_CONFLICT_MARKER_SEP);
943 ce09ab8d 2019-10-06 stsp return err;
945 e9dabdfb 2019-10-06 stsp if (fseek(d3s->fp[2], (long)d3s->de[n].new.from, SEEK_SET)
947 e9dabdfb 2019-10-06 stsp return got_error_from_errno("fseek");
948 078e971d 2019-02-08 stsp k = d3s->de[n].new.to - d3s->de[n].new.from;
949 e19660d5 2019-10-06 stsp for (; k > 0; k -= j) {
950 74b37681 2019-02-07 stsp j = k > BUFSIZ ? BUFSIZ : k;
951 078e971d 2019-02-08 stsp if (fread(block, 1, j, d3s->fp[2]) != (size_t)j)
952 180dce26 2019-10-06 stsp return got_ferror(d3s->fp[2], GOT_ERR_IO);
953 74b37681 2019-02-07 stsp block[j] = '\0';
954 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%s", block);
956 ce09ab8d 2019-10-06 stsp return err;
959 ce09ab8d 2019-10-06 stsp if (!d3s->overlap[n]) {
960 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, ".\n");
962 ce09ab8d 2019-10-06 stsp return err;
964 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%s\n.\n", d3s->f3mark);
966 ce09ab8d 2019-10-06 stsp return err;
967 ce09ab8d 2019-10-06 stsp err = diff_output(d3s->diffbuf, "%da\n%s\n.\n",
968 5176f942 2019-02-08 stsp d3s->de[n].old.from - 1, d3s->f1mark);
970 ce09ab8d 2019-10-06 stsp return err;
974 180dce26 2019-10-06 stsp return NULL;
977 c03c6cb3 2019-02-08 stsp static const struct got_error *
978 078e971d 2019-02-08 stsp increase(struct diff3_state *d3s)
980 74b37681 2019-02-07 stsp size_t newsz, incr;
981 c03c6cb3 2019-02-08 stsp struct diff *d;
984 74b37681 2019-02-07 stsp /* are the memset(3) calls needed? */
985 078e971d 2019-02-08 stsp newsz = d3s->szchanges == 0 ? 64 : 2 * d3s->szchanges;
986 078e971d 2019-02-08 stsp incr = newsz - d3s->szchanges;
988 078e971d 2019-02-08 stsp d = reallocarray(d3s->d13, newsz, sizeof(*d3s->d13));
989 c03c6cb3 2019-02-08 stsp if (d == NULL)
990 638f9024 2019-05-13 stsp return got_error_from_errno("reallocarray");
991 078e971d 2019-02-08 stsp d3s->d13 = d;
992 078e971d 2019-02-08 stsp memset(d3s->d13 + d3s->szchanges, 0, incr * sizeof(*d3s->d13));
994 078e971d 2019-02-08 stsp d = reallocarray(d3s->d23, newsz, sizeof(*d3s->d23));
995 c03c6cb3 2019-02-08 stsp if (d == NULL)
996 638f9024 2019-05-13 stsp return got_error_from_errno("reallocarray");
997 078e971d 2019-02-08 stsp d3s->d23 = d;
998 078e971d 2019-02-08 stsp memset(d3s->d23 + d3s->szchanges, 0, incr * sizeof(*d3s->d23));
1000 078e971d 2019-02-08 stsp d = reallocarray(d3s->de, newsz, sizeof(*d3s->de));
1001 c03c6cb3 2019-02-08 stsp if (d == NULL)
1002 638f9024 2019-05-13 stsp return got_error_from_errno("reallocarray");
1003 078e971d 2019-02-08 stsp d3s->de = d;
1004 078e971d 2019-02-08 stsp memset(d3s->de + d3s->szchanges, 0, incr * sizeof(*d3s->de));
1006 078e971d 2019-02-08 stsp s = reallocarray(d3s->overlap, newsz, sizeof(*d3s->overlap));
1007 c03c6cb3 2019-02-08 stsp if (s == NULL)
1008 638f9024 2019-05-13 stsp return got_error_from_errno("reallocarray");
1009 078e971d 2019-02-08 stsp d3s->overlap = s;
1010 078e971d 2019-02-08 stsp memset(d3s->overlap + d3s->szchanges, 0, incr * sizeof(*d3s->overlap));
1011 078e971d 2019-02-08 stsp d3s->szchanges = newsz;
1013 c03c6cb3 2019-02-08 stsp return NULL;
