2 e6bcace5 2021-06-22 stsp * Copyright (c) 2020 Ori Bernstein
3 e6bcace5 2021-06-22 stsp * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
5 e6bcace5 2021-06-22 stsp * Permission to use, copy, modify, and distribute this software for any
6 e6bcace5 2021-06-22 stsp * purpose with or without fee is hereby granted, provided that the above
7 e6bcace5 2021-06-22 stsp * copyright notice and this permission notice appear in all copies.
9 e6bcace5 2021-06-22 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 e6bcace5 2021-06-22 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 e6bcace5 2021-06-22 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 e6bcace5 2021-06-22 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 e6bcace5 2021-06-22 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 e6bcace5 2021-06-22 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 e6bcace5 2021-06-22 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 e6bcace5 2021-06-22 stsp #include <sys/queue.h>
19 e6bcace5 2021-06-22 stsp #include <sys/stat.h>
21 e6bcace5 2021-06-22 stsp #include <inttypes.h>
22 e6bcace5 2021-06-22 stsp #include <stdio.h>
23 e6bcace5 2021-06-22 stsp #include <stdlib.h>
24 e6bcace5 2021-06-22 stsp #include <string.h>
25 e6bcace5 2021-06-22 stsp #include <sha1.h>
26 e6bcace5 2021-06-22 stsp #include <limits.h>
27 e6bcace5 2021-06-22 stsp #include <zlib.h>
29 e6bcace5 2021-06-22 stsp #include "got_error.h"
30 e6bcace5 2021-06-22 stsp #include "got_cancel.h"
31 e6bcace5 2021-06-22 stsp #include "got_object.h"
33 e6bcace5 2021-06-22 stsp #include "got_lib_deltify.h"
34 e6bcace5 2021-06-22 stsp #include "got_lib_delta.h"
35 e6bcace5 2021-06-22 stsp #include "got_lib_object.h"
36 e6bcace5 2021-06-22 stsp #include "got_lib_object_idset.h"
37 e6bcace5 2021-06-22 stsp #include "got_lib_deflate.h"
38 e6bcace5 2021-06-22 stsp #include "got_lib_pack.h"
41 e6bcace5 2021-06-22 stsp #define MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
44 e6bcace5 2021-06-22 stsp struct got_pack_meta {
45 e6bcace5 2021-06-22 stsp struct got_object_id id;
47 e6bcace5 2021-06-22 stsp int obj_type;
48 e6bcace5 2021-06-22 stsp time_t mtime;
50 e6bcace5 2021-06-22 stsp /* The best delta we picked */
51 e6bcace5 2021-06-22 stsp struct got_pack_meta *head;
52 e6bcace5 2021-06-22 stsp struct got_pack_meta *prev;
53 e6bcace5 2021-06-22 stsp struct got_delta_instruction *deltas;
54 e6bcace5 2021-06-22 stsp int ndeltas;
57 e6bcace5 2021-06-22 stsp /* Only used for delta window */
58 e6bcace5 2021-06-22 stsp struct got_delta_table *dtab;
60 e6bcace5 2021-06-22 stsp /* Only used for writing offset deltas */
64 e6bcace5 2021-06-22 stsp struct got_pack_metavec {
65 e6bcace5 2021-06-22 stsp struct got_pack_meta **meta;
70 e6bcace5 2021-06-22 stsp static const struct got_error *
71 e6bcace5 2021-06-22 stsp alloc_meta(struct got_pack_meta **new, struct got_object_id *id,
72 e6bcace5 2021-06-22 stsp const char *path, int obj_type, time_t mtime)
74 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
75 e6bcace5 2021-06-22 stsp struct got_pack_meta *m;
77 e6bcace5 2021-06-22 stsp *new = NULL;
79 e6bcace5 2021-06-22 stsp m = calloc(1, sizeof(*m));
80 e6bcace5 2021-06-22 stsp if (m == NULL)
81 e6bcace5 2021-06-22 stsp return got_error_from_errno("malloc");
83 e6bcace5 2021-06-22 stsp memcpy(&m->id, id, sizeof(m->id));
85 e6bcace5 2021-06-22 stsp m->path = strdup(path);
86 e6bcace5 2021-06-22 stsp if (m->path == NULL) {
87 e6bcace5 2021-06-22 stsp err = got_error_from_errno("strdup");
92 e6bcace5 2021-06-22 stsp m->obj_type = obj_type;
93 e6bcace5 2021-06-22 stsp m->mtime = mtime;
95 e6bcace5 2021-06-22 stsp return NULL;
99 e6bcace5 2021-06-22 stsp clear_meta(struct got_pack_meta *meta)
101 e6bcace5 2021-06-22 stsp if (meta == NULL)
103 e6bcace5 2021-06-22 stsp free(meta->deltas);
104 e6bcace5 2021-06-22 stsp meta->deltas = NULL;
105 e6bcace5 2021-06-22 stsp free(meta->path);
106 e6bcace5 2021-06-22 stsp meta->path = NULL;
109 e6bcace5 2021-06-22 stsp static void
110 e6bcace5 2021-06-22 stsp free_nmeta(struct got_pack_meta **meta, int nmeta)
114 e6bcace5 2021-06-22 stsp for (i = 0; i < nmeta; i++)
115 e6bcace5 2021-06-22 stsp clear_meta(meta[i]);
116 e6bcace5 2021-06-22 stsp free(meta);
120 e6bcace5 2021-06-22 stsp delta_order_cmp(const void *pa, const void *pb)
122 e6bcace5 2021-06-22 stsp struct got_pack_meta *a, *b;
125 e6bcace5 2021-06-22 stsp a = *(struct got_pack_meta **)pa;
126 e6bcace5 2021-06-22 stsp b = *(struct got_pack_meta **)pb;
128 e6bcace5 2021-06-22 stsp if (a->obj_type != b->obj_type)
129 e6bcace5 2021-06-22 stsp return a->obj_type - b->obj_type;
130 e6bcace5 2021-06-22 stsp cmp = strcmp(a->path, b->path);
131 e6bcace5 2021-06-22 stsp if (cmp != 0)
132 e6bcace5 2021-06-22 stsp return cmp;
133 e6bcace5 2021-06-22 stsp if (a->mtime != b->mtime)
134 e6bcace5 2021-06-22 stsp return a->mtime - b->mtime;
135 e6bcace5 2021-06-22 stsp return got_object_id_cmp(&a->id, &b->id);
139 e6bcace5 2021-06-22 stsp showprogress(int x, int pct)
141 e6bcace5 2021-06-22 stsp if(x > pct){
143 e6bcace5 2021-06-22 stsp fprintf(stderr, "\b\b\b\b%3d%%", pct);
145 e6bcace5 2021-06-22 stsp return pct;
149 e6bcace5 2021-06-22 stsp delta_size(struct got_delta_instruction *deltas, int ndeltas)
151 e6bcace5 2021-06-22 stsp int i, size = 32;
152 e6bcace5 2021-06-22 stsp for (i = 0; i < ndeltas; i++) {
153 e6bcace5 2021-06-22 stsp if (deltas[i].copy)
154 e6bcace5 2021-06-22 stsp size += GOT_DELTA_SIZE_SHIFT;
156 e6bcace5 2021-06-22 stsp size += deltas[i].len + 1;
158 e6bcace5 2021-06-22 stsp return size;
162 e6bcace5 2021-06-22 stsp static const struct got_error *
163 e6bcace5 2021-06-22 stsp pick_deltas(struct got_pack_meta **meta, int nmeta, struct got_repository *repo,
164 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
166 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
167 e6bcace5 2021-06-22 stsp struct got_pack_meta *m = NULL, *base = NULL;
168 e6bcace5 2021-06-22 stsp struct got_raw_object *raw = NULL, *base_raw = NULL;
169 e6bcace5 2021-06-22 stsp struct got_delta_instruction *deltas;
170 e6bcace5 2021-06-22 stsp int i, j, size, ndeltas, pct, best;
171 e6bcace5 2021-06-22 stsp const int max_base_candidates = 10;
174 e6bcace5 2021-06-22 stsp fprintf(stderr, "picking deltas\n");
175 e6bcace5 2021-06-22 stsp fprintf(stderr, "deltifying %d objects: 0%%", nmeta);
176 e6bcace5 2021-06-22 stsp qsort(meta, nmeta, sizeof(struct got_pack_meta *), delta_order_cmp);
177 e6bcace5 2021-06-22 stsp for (i = 0; i < nmeta; i++) {
178 e6bcace5 2021-06-22 stsp if (cancel_cb) {
179 e6bcace5 2021-06-22 stsp err = (*cancel_cb)(cancel_arg);
184 e6bcace5 2021-06-22 stsp m = meta[i];
185 e6bcace5 2021-06-22 stsp pct = showprogress((i*100) / nmeta, pct);
186 e6bcace5 2021-06-22 stsp m->deltas = NULL;
187 e6bcace5 2021-06-22 stsp m->ndeltas = 0;
189 e6bcace5 2021-06-22 stsp if (m->obj_type == GOT_OBJ_TYPE_COMMIT ||
190 e6bcace5 2021-06-22 stsp m->obj_type == GOT_OBJ_TYPE_TAG)
193 e6bcace5 2021-06-22 stsp err = got_object_raw_open(&raw, repo, &m->id, 8192);
197 e6bcace5 2021-06-22 stsp err = got_deltify_init(&m->dtab, raw->f, raw->hdrlen,
198 e6bcace5 2021-06-22 stsp raw->size + raw->hdrlen);
202 e6bcace5 2021-06-22 stsp if (i > max_base_candidates) {
203 e6bcace5 2021-06-22 stsp struct got_pack_meta *n = NULL;
204 e6bcace5 2021-06-22 stsp n = meta[i - (max_base_candidates + 1)];
205 e6bcace5 2021-06-22 stsp got_deltify_free(n->dtab);
206 e6bcace5 2021-06-22 stsp n->dtab = NULL;
209 e6bcace5 2021-06-22 stsp best = raw->size;
210 e6bcace5 2021-06-22 stsp for (j = MAX(0, i - max_base_candidates); j < i; j++) {
211 e6bcace5 2021-06-22 stsp if (cancel_cb) {
212 e6bcace5 2021-06-22 stsp err = (*cancel_cb)(cancel_arg);
216 e6bcace5 2021-06-22 stsp base = meta[j];
217 e6bcace5 2021-06-22 stsp /* long chains make unpacking slow, avoid such bases */
218 e6bcace5 2021-06-22 stsp if (base->nchain >= 128 ||
219 e6bcace5 2021-06-22 stsp base->obj_type != m->obj_type)
222 e6bcace5 2021-06-22 stsp err = got_object_raw_open(&base_raw, repo, &base->id,
226 e6bcace5 2021-06-22 stsp err = got_deltify(&deltas, &ndeltas,
227 e6bcace5 2021-06-22 stsp raw->f, raw->hdrlen, raw->size + raw->hdrlen,
228 e6bcace5 2021-06-22 stsp base->dtab, base_raw->f, base_raw->hdrlen,
229 e6bcace5 2021-06-22 stsp base_raw->size + base_raw->hdrlen);
230 e6bcace5 2021-06-22 stsp got_object_raw_close(base_raw);
231 e6bcace5 2021-06-22 stsp base_raw = NULL;
235 e6bcace5 2021-06-22 stsp size = delta_size(deltas, ndeltas);
236 e6bcace5 2021-06-22 stsp if (size + 32 < best){
238 e6bcace5 2021-06-22 stsp * if we already picked a best delta,
239 e6bcace5 2021-06-22 stsp * replace it.
241 e6bcace5 2021-06-22 stsp free(m->deltas);
242 e6bcace5 2021-06-22 stsp best = size;
243 e6bcace5 2021-06-22 stsp m->deltas = deltas;
244 e6bcace5 2021-06-22 stsp m->ndeltas = ndeltas;
245 e6bcace5 2021-06-22 stsp m->nchain = base->nchain + 1;
246 e6bcace5 2021-06-22 stsp m->prev = base;
247 e6bcace5 2021-06-22 stsp m->head = base->head;
248 e6bcace5 2021-06-22 stsp if (m->head == NULL)
249 e6bcace5 2021-06-22 stsp m->head = base;
251 e6bcace5 2021-06-22 stsp free(deltas);
252 e6bcace5 2021-06-22 stsp deltas = NULL;
253 e6bcace5 2021-06-22 stsp ndeltas = 0;
257 e6bcace5 2021-06-22 stsp got_object_raw_close(raw);
258 e6bcace5 2021-06-22 stsp raw = NULL;
261 e6bcace5 2021-06-22 stsp fprintf(stderr, "\b\b\b\b100%%\n");
263 e6bcace5 2021-06-22 stsp for (i = MAX(0, nmeta - max_base_candidates); i < nmeta; i++) {
264 e6bcace5 2021-06-22 stsp got_deltify_free(meta[i]->dtab);
265 e6bcace5 2021-06-22 stsp meta[i]->dtab = NULL;
268 e6bcace5 2021-06-22 stsp got_object_raw_close(raw);
269 e6bcace5 2021-06-22 stsp if (base_raw)
270 e6bcace5 2021-06-22 stsp got_object_raw_close(base_raw);
271 e6bcace5 2021-06-22 stsp return err;
274 e6bcace5 2021-06-22 stsp static const struct got_error *
275 e6bcace5 2021-06-22 stsp add_meta(struct got_pack_metavec *v, struct got_object_idset *idset,
276 e6bcace5 2021-06-22 stsp struct got_object_id *id, const char *path, int obj_type,
277 e6bcace5 2021-06-22 stsp time_t mtime)
279 e6bcace5 2021-06-22 stsp const struct got_error *err;
280 e6bcace5 2021-06-22 stsp struct got_pack_meta *m;
282 e6bcace5 2021-06-22 stsp err = got_object_idset_add(idset, id, NULL);
284 e6bcace5 2021-06-22 stsp return err;
286 e6bcace5 2021-06-22 stsp if (v == NULL)
287 e6bcace5 2021-06-22 stsp return NULL;
289 e6bcace5 2021-06-22 stsp err = alloc_meta(&m, id, path, obj_type, mtime);
293 e6bcace5 2021-06-22 stsp if (v->nmeta == v->metasz){
294 e6bcace5 2021-06-22 stsp size_t newsize = 2 * v->metasz;
295 e6bcace5 2021-06-22 stsp struct got_pack_meta **new;
296 e6bcace5 2021-06-22 stsp new = reallocarray(v->meta, newsize, sizeof(*new));
297 e6bcace5 2021-06-22 stsp if (new == NULL) {
298 e6bcace5 2021-06-22 stsp err = got_error_from_errno("reallocarray");
301 e6bcace5 2021-06-22 stsp v->meta = new;
302 e6bcace5 2021-06-22 stsp v->metasz = newsize;
306 e6bcace5 2021-06-22 stsp clear_meta(m);
309 e6bcace5 2021-06-22 stsp v->meta[v->nmeta++] = m;
311 e6bcace5 2021-06-22 stsp return err;
314 e6bcace5 2021-06-22 stsp static const struct got_error *
315 e6bcace5 2021-06-22 stsp load_tree_entries(struct got_object_id_queue *ids, struct got_pack_metavec *v,
316 e6bcace5 2021-06-22 stsp struct got_object_idset *idset, struct got_object_id *tree_id,
317 e6bcace5 2021-06-22 stsp const char *dpath, time_t mtime, struct got_repository *repo,
318 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
320 e6bcace5 2021-06-22 stsp const struct got_error *err;
321 e6bcace5 2021-06-22 stsp struct got_tree_object *tree;
322 e6bcace5 2021-06-22 stsp char *p = NULL;
325 e6bcace5 2021-06-22 stsp err = got_object_open_as_tree(&tree, repo, tree_id);
327 e6bcace5 2021-06-22 stsp return err;
329 e6bcace5 2021-06-22 stsp for (i = 0; i < got_object_tree_get_nentries(tree); i++) {
330 e6bcace5 2021-06-22 stsp struct got_tree_entry *e = got_object_tree_get_entry(tree, i);
331 e6bcace5 2021-06-22 stsp struct got_object_id *id = got_tree_entry_get_id(e);
332 e6bcace5 2021-06-22 stsp mode_t mode = got_tree_entry_get_mode(e);
334 e6bcace5 2021-06-22 stsp if (cancel_cb) {
335 e6bcace5 2021-06-22 stsp err = (*cancel_cb)(cancel_arg);
340 e6bcace5 2021-06-22 stsp if (got_object_tree_entry_is_symlink(e) ||
341 e6bcace5 2021-06-22 stsp got_object_tree_entry_is_submodule(e) ||
342 e6bcace5 2021-06-22 stsp got_object_idset_contains(idset, id))
345 e6bcace5 2021-06-22 stsp if (asprintf(&p, "%s%s%s", dpath, dpath[0] != '\0' ? "/" : "",
346 e6bcace5 2021-06-22 stsp got_tree_entry_get_name(e)) == -1) {
347 e6bcace5 2021-06-22 stsp err = got_error_from_errno("asprintf");
351 e6bcace5 2021-06-22 stsp if (S_ISDIR(mode)) {
352 e6bcace5 2021-06-22 stsp struct got_object_qid *qid;
353 e6bcace5 2021-06-22 stsp err = got_object_qid_alloc(&qid, id);
356 e6bcace5 2021-06-22 stsp SIMPLEQ_INSERT_TAIL(ids, qid, entry);
357 e6bcace5 2021-06-22 stsp } else if (S_ISREG(mode)) {
358 e6bcace5 2021-06-22 stsp err = add_meta(v, idset, id, p, GOT_OBJ_TYPE_BLOB,
367 e6bcace5 2021-06-22 stsp got_object_tree_close(tree);
369 e6bcace5 2021-06-22 stsp return err;
372 e6bcace5 2021-06-22 stsp static const struct got_error *
373 e6bcace5 2021-06-22 stsp load_tree(struct got_pack_metavec *v, struct got_object_idset *idset,
374 e6bcace5 2021-06-22 stsp struct got_object_id *tree_id, const char *dpath, time_t mtime,
375 e6bcace5 2021-06-22 stsp struct got_repository *repo, got_cancel_cb cancel_cb, void *cancel_arg)
377 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
378 e6bcace5 2021-06-22 stsp struct got_object_id_queue tree_ids;
379 e6bcace5 2021-06-22 stsp struct got_object_qid *qid;
381 e6bcace5 2021-06-22 stsp if (got_object_idset_contains(idset, tree_id))
382 e6bcace5 2021-06-22 stsp return NULL;
384 e6bcace5 2021-06-22 stsp err = got_object_qid_alloc(&qid, tree_id);
386 e6bcace5 2021-06-22 stsp return err;
388 e6bcace5 2021-06-22 stsp SIMPLEQ_INIT(&tree_ids);
389 e6bcace5 2021-06-22 stsp SIMPLEQ_INSERT_TAIL(&tree_ids, qid, entry);
391 e6bcace5 2021-06-22 stsp while (!SIMPLEQ_EMPTY(&tree_ids)) {
392 e6bcace5 2021-06-22 stsp if (cancel_cb) {
393 e6bcace5 2021-06-22 stsp err = (*cancel_cb)(cancel_arg);
398 e6bcace5 2021-06-22 stsp qid = SIMPLEQ_FIRST(&tree_ids);
399 e6bcace5 2021-06-22 stsp SIMPLEQ_REMOVE_HEAD(&tree_ids, entry);
401 e6bcace5 2021-06-22 stsp if (got_object_idset_contains(idset, qid->id)) {
402 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
406 e6bcace5 2021-06-22 stsp err = add_meta(v, idset, qid->id, dpath, GOT_OBJ_TYPE_TREE,
409 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
413 e6bcace5 2021-06-22 stsp err = load_tree_entries(&tree_ids, v, idset, qid->id, dpath,
414 e6bcace5 2021-06-22 stsp mtime, repo, cancel_cb, cancel_arg);
415 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
420 e6bcace5 2021-06-22 stsp got_object_id_queue_free(&tree_ids);
421 e6bcace5 2021-06-22 stsp return err;
424 e6bcace5 2021-06-22 stsp static const struct got_error *
425 e6bcace5 2021-06-22 stsp load_commit(struct got_pack_metavec *v, struct got_object_idset *idset,
426 e6bcace5 2021-06-22 stsp struct got_object_id *id, struct got_repository *repo,
427 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
429 e6bcace5 2021-06-22 stsp const struct got_error *err;
430 e6bcace5 2021-06-22 stsp struct got_commit_object *commit;
432 e6bcace5 2021-06-22 stsp if (got_object_idset_contains(idset, id))
433 e6bcace5 2021-06-22 stsp return NULL;
435 e6bcace5 2021-06-22 stsp err = got_object_open_as_commit(&commit, repo, id);
437 e6bcace5 2021-06-22 stsp return err;
439 e6bcace5 2021-06-22 stsp err = add_meta(v, idset, id, "", GOT_OBJ_TYPE_COMMIT,
440 e6bcace5 2021-06-22 stsp got_object_commit_get_committer_time(commit));
444 e6bcace5 2021-06-22 stsp err = load_tree(v, idset, got_object_commit_get_tree_id(commit),
445 e6bcace5 2021-06-22 stsp "", got_object_commit_get_committer_time(commit), repo,
446 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
448 e6bcace5 2021-06-22 stsp got_object_commit_close(commit);
449 e6bcace5 2021-06-22 stsp return err;
452 e6bcace5 2021-06-22 stsp enum findtwixt_color {
453 e6bcace5 2021-06-22 stsp COLOR_KEEP = 0,
454 e6bcace5 2021-06-22 stsp COLOR_DROP,
455 e6bcace5 2021-06-22 stsp COLOR_BLANK,
457 e6bcace5 2021-06-22 stsp static const int findtwixt_colors[] = {
458 e6bcace5 2021-06-22 stsp COLOR_KEEP,
459 e6bcace5 2021-06-22 stsp COLOR_DROP,
460 e6bcace5 2021-06-22 stsp COLOR_BLANK
463 e6bcace5 2021-06-22 stsp static const struct got_error *
464 e6bcace5 2021-06-22 stsp queue_commit_id(struct got_object_id_queue *ids, struct got_object_id *id,
465 e6bcace5 2021-06-22 stsp int color, struct got_repository *repo)
467 e6bcace5 2021-06-22 stsp const struct got_error *err;
468 e6bcace5 2021-06-22 stsp struct got_object_qid *qid;
469 e6bcace5 2021-06-22 stsp char *id_str;
470 e6bcace5 2021-06-22 stsp int obj_type;
472 e6bcace5 2021-06-22 stsp err = got_object_get_type(&obj_type, repo, id);
474 e6bcace5 2021-06-22 stsp return err;
476 e6bcace5 2021-06-22 stsp if (obj_type != GOT_OBJ_TYPE_COMMIT) {
477 e6bcace5 2021-06-22 stsp err = got_object_id_str(&id_str, id);
479 e6bcace5 2021-06-22 stsp return err;
480 e6bcace5 2021-06-22 stsp err = got_error_fmt(GOT_ERR_OBJ_TYPE,
481 e6bcace5 2021-06-22 stsp "%s is not a commit", id_str);
482 e6bcace5 2021-06-22 stsp free(id_str);
483 e6bcace5 2021-06-22 stsp return err;
485 e6bcace5 2021-06-22 stsp err = got_object_qid_alloc(&qid, id);
487 e6bcace5 2021-06-22 stsp return err;
489 e6bcace5 2021-06-22 stsp SIMPLEQ_INSERT_TAIL(ids, qid, entry);
490 e6bcace5 2021-06-22 stsp qid->data = (void *)&findtwixt_colors[color];
491 e6bcace5 2021-06-22 stsp return NULL;
494 e6bcace5 2021-06-22 stsp static const struct got_error *
495 e6bcace5 2021-06-22 stsp drop_commit(struct got_object_idset *keep, struct got_object_idset *drop,
496 e6bcace5 2021-06-22 stsp struct got_object_id *id, struct got_repository *repo,
497 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
499 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
500 e6bcace5 2021-06-22 stsp struct got_commit_object *commit;
501 e6bcace5 2021-06-22 stsp const struct got_object_id_queue *parents;
502 e6bcace5 2021-06-22 stsp struct got_object_id_queue ids;
503 e6bcace5 2021-06-22 stsp struct got_object_qid *qid;
505 e6bcace5 2021-06-22 stsp SIMPLEQ_INIT(&ids);
507 e6bcace5 2021-06-22 stsp err = got_object_qid_alloc(&qid, id);
509 e6bcace5 2021-06-22 stsp return err;
510 e6bcace5 2021-06-22 stsp SIMPLEQ_INSERT_HEAD(&ids, qid, entry);
512 e6bcace5 2021-06-22 stsp while (!SIMPLEQ_EMPTY(&ids)) {
513 e6bcace5 2021-06-22 stsp if (cancel_cb) {
514 e6bcace5 2021-06-22 stsp err = (*cancel_cb)(cancel_arg);
519 e6bcace5 2021-06-22 stsp qid = SIMPLEQ_FIRST(&ids);
520 e6bcace5 2021-06-22 stsp SIMPLEQ_REMOVE_HEAD(&ids, entry);
522 e6bcace5 2021-06-22 stsp if (got_object_idset_contains(drop, qid->id)) {
523 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
527 e6bcace5 2021-06-22 stsp err = got_object_idset_add(drop, qid->id, NULL);
529 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
533 e6bcace5 2021-06-22 stsp if (!got_object_idset_contains(keep, qid->id)) {
534 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
538 e6bcace5 2021-06-22 stsp err = got_object_open_as_commit(&commit, repo, qid->id);
539 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
543 e6bcace5 2021-06-22 stsp parents = got_object_commit_get_parent_ids(commit);
544 e6bcace5 2021-06-22 stsp if (parents) {
545 e6bcace5 2021-06-22 stsp err = got_object_id_queue_copy(parents, &ids);
547 e6bcace5 2021-06-22 stsp got_object_commit_close(commit);
551 e6bcace5 2021-06-22 stsp got_object_commit_close(commit);
554 e6bcace5 2021-06-22 stsp got_object_id_queue_free(&ids);
555 e6bcace5 2021-06-22 stsp return err;
558 e6bcace5 2021-06-22 stsp struct append_id_arg {
559 e6bcace5 2021-06-22 stsp struct got_object_id **array;
563 e6bcace5 2021-06-22 stsp static const struct got_error *
564 e6bcace5 2021-06-22 stsp append_id(struct got_object_id *id, void *data, void *arg)
566 e6bcace5 2021-06-22 stsp struct append_id_arg *a = arg;
568 e6bcace5 2021-06-22 stsp a->array[a->idx] = got_object_id_dup(id);
569 e6bcace5 2021-06-22 stsp if (a->array[a->idx] == NULL)
570 e6bcace5 2021-06-22 stsp return got_error_from_errno("got_object_id_dup");
573 e6bcace5 2021-06-22 stsp return NULL;
576 e6bcace5 2021-06-22 stsp static const struct got_error *
577 e6bcace5 2021-06-22 stsp findtwixt(struct got_object_id ***res, int *nres,
578 e6bcace5 2021-06-22 stsp struct got_object_id **head, int nhead,
579 e6bcace5 2021-06-22 stsp struct got_object_id **tail, int ntail,
580 e6bcace5 2021-06-22 stsp struct got_repository *repo,
581 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
583 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
584 e6bcace5 2021-06-22 stsp struct got_object_id_queue ids;
585 e6bcace5 2021-06-22 stsp struct got_object_idset *keep, *drop;
586 e6bcace5 2021-06-22 stsp struct got_object_qid *qid;
587 e6bcace5 2021-06-22 stsp int i, ncolor, nkeep;
589 e6bcace5 2021-06-22 stsp SIMPLEQ_INIT(&ids);
590 e6bcace5 2021-06-22 stsp *res = NULL;
593 e6bcace5 2021-06-22 stsp keep = got_object_idset_alloc();
594 e6bcace5 2021-06-22 stsp if (keep == NULL)
595 e6bcace5 2021-06-22 stsp return got_error_from_errno("got_object_idset_alloc");
597 e6bcace5 2021-06-22 stsp drop = got_object_idset_alloc();
598 e6bcace5 2021-06-22 stsp if (drop == NULL) {
599 e6bcace5 2021-06-22 stsp err = got_error_from_errno("got_object_idset_alloc");
603 e6bcace5 2021-06-22 stsp for (i = 0; i < nhead; i++){
604 e6bcace5 2021-06-22 stsp if (head[i]) {
605 e6bcace5 2021-06-22 stsp err = queue_commit_id(&ids, head[i], COLOR_KEEP, repo);
610 e6bcace5 2021-06-22 stsp for (i = 0; i < ntail; i++){
611 e6bcace5 2021-06-22 stsp if (tail[i]) {
612 e6bcace5 2021-06-22 stsp err = queue_commit_id(&ids, tail[i], COLOR_DROP, repo);
618 e6bcace5 2021-06-22 stsp while (!SIMPLEQ_EMPTY(&ids)) {
619 e6bcace5 2021-06-22 stsp int qcolor;
620 e6bcace5 2021-06-22 stsp qid = SIMPLEQ_FIRST(&ids);
621 e6bcace5 2021-06-22 stsp qcolor = *((int *)qid->data);
623 e6bcace5 2021-06-22 stsp if (got_object_idset_contains(drop, qid->id))
624 e6bcace5 2021-06-22 stsp ncolor = COLOR_DROP;
625 e6bcace5 2021-06-22 stsp else if (got_object_idset_contains(keep, qid->id))
626 e6bcace5 2021-06-22 stsp ncolor = COLOR_KEEP;
628 e6bcace5 2021-06-22 stsp ncolor = COLOR_BLANK;
630 e6bcace5 2021-06-22 stsp if (ncolor == COLOR_DROP || (ncolor == COLOR_KEEP &&
631 e6bcace5 2021-06-22 stsp qcolor == COLOR_KEEP)) {
632 e6bcace5 2021-06-22 stsp SIMPLEQ_REMOVE_HEAD(&ids, entry);
633 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
637 e6bcace5 2021-06-22 stsp if (ncolor == COLOR_KEEP && qcolor == COLOR_DROP) {
638 e6bcace5 2021-06-22 stsp err = drop_commit(keep, drop, qid->id, repo,
639 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
642 e6bcace5 2021-06-22 stsp } else if (ncolor == COLOR_BLANK) {
643 e6bcace5 2021-06-22 stsp struct got_commit_object *commit;
644 e6bcace5 2021-06-22 stsp struct got_object_id *id;
645 e6bcace5 2021-06-22 stsp const struct got_object_id_queue *parents;
646 e6bcace5 2021-06-22 stsp struct got_object_qid *pid;
648 e6bcace5 2021-06-22 stsp id = got_object_id_dup(qid->id);
649 e6bcace5 2021-06-22 stsp if (id == NULL) {
650 e6bcace5 2021-06-22 stsp err = got_error_from_errno("got_object_id_dup");
653 e6bcace5 2021-06-22 stsp if (qcolor == COLOR_KEEP)
654 e6bcace5 2021-06-22 stsp err = got_object_idset_add(keep, id, NULL);
656 e6bcace5 2021-06-22 stsp err = got_object_idset_add(drop, id, NULL);
662 e6bcace5 2021-06-22 stsp err = got_object_open_as_commit(&commit, repo, id);
667 e6bcace5 2021-06-22 stsp parents = got_object_commit_get_parent_ids(commit);
668 e6bcace5 2021-06-22 stsp if (parents) {
669 e6bcace5 2021-06-22 stsp SIMPLEQ_FOREACH(pid, parents, entry) {
670 e6bcace5 2021-06-22 stsp err = queue_commit_id(&ids, pid->id,
671 e6bcace5 2021-06-22 stsp qcolor, repo);
678 e6bcace5 2021-06-22 stsp got_object_commit_close(commit);
679 e6bcace5 2021-06-22 stsp commit = NULL;
681 e6bcace5 2021-06-22 stsp /* should not happen */
682 e6bcace5 2021-06-22 stsp err = got_error_fmt(GOT_ERR_NOT_IMPL,
683 e6bcace5 2021-06-22 stsp "%s ncolor=%d qcolor=%d", __func__, ncolor, qcolor);
687 e6bcace5 2021-06-22 stsp SIMPLEQ_REMOVE_HEAD(&ids, entry);
688 e6bcace5 2021-06-22 stsp got_object_qid_free(qid);
691 e6bcace5 2021-06-22 stsp nkeep = got_object_idset_num_elements(keep);
692 e6bcace5 2021-06-22 stsp if (nkeep > 0) {
693 e6bcace5 2021-06-22 stsp struct append_id_arg arg;
694 e6bcace5 2021-06-22 stsp arg.array = calloc(nkeep, sizeof(struct got_object_id *));
695 e6bcace5 2021-06-22 stsp if (arg.array == NULL) {
696 e6bcace5 2021-06-22 stsp err = got_error_from_errno("calloc");
699 e6bcace5 2021-06-22 stsp arg.idx = 0;
700 e6bcace5 2021-06-22 stsp err = got_object_idset_for_each(keep, append_id, &arg);
702 e6bcace5 2021-06-22 stsp free(arg.array);
705 e6bcace5 2021-06-22 stsp *res = arg.array;
706 e6bcace5 2021-06-22 stsp *nres = nkeep;
709 e6bcace5 2021-06-22 stsp got_object_idset_free(keep);
710 e6bcace5 2021-06-22 stsp got_object_idset_free(drop);
711 e6bcace5 2021-06-22 stsp got_object_id_queue_free(&ids);
712 e6bcace5 2021-06-22 stsp return err;
715 e6bcace5 2021-06-22 stsp static const struct got_error *
716 e6bcace5 2021-06-22 stsp read_meta(struct got_pack_meta ***meta, int *nmeta,
717 e6bcace5 2021-06-22 stsp struct got_object_id **theirs, int ntheirs,
718 e6bcace5 2021-06-22 stsp struct got_object_id **ours, int nours, struct got_repository *repo,
719 e6bcace5 2021-06-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
721 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
722 e6bcace5 2021-06-22 stsp struct got_object_id **ids = NULL;
723 e6bcace5 2021-06-22 stsp struct got_object_idset *idset;
724 e6bcace5 2021-06-22 stsp int i, nobj = 0;
725 e6bcace5 2021-06-22 stsp struct got_pack_metavec v;
727 e6bcace5 2021-06-22 stsp *meta = NULL;
728 e6bcace5 2021-06-22 stsp *nmeta = 0;
730 e6bcace5 2021-06-22 stsp idset = got_object_idset_alloc();
731 e6bcace5 2021-06-22 stsp if (idset == NULL)
732 e6bcace5 2021-06-22 stsp return got_error_from_errno("got_object_idset_alloc");
734 e6bcace5 2021-06-22 stsp v.nmeta = 0;
735 e6bcace5 2021-06-22 stsp v.metasz = 64;
736 e6bcace5 2021-06-22 stsp v.meta = calloc(v.metasz, sizeof(struct got_pack_meta *));
737 e6bcace5 2021-06-22 stsp if (v.meta == NULL) {
738 e6bcace5 2021-06-22 stsp err = got_error_from_errno("reallocarray");
742 e6bcace5 2021-06-22 stsp err = findtwixt(&ids, &nobj, ours, nours, theirs, ntheirs, repo,
743 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
744 e6bcace5 2021-06-22 stsp if (err || nobj == 0)
747 e6bcace5 2021-06-22 stsp for (i = 0; i < ntheirs; i++) {
748 e6bcace5 2021-06-22 stsp if (theirs[i] != NULL) {
749 e6bcace5 2021-06-22 stsp err = load_commit(NULL, idset, theirs[i], repo,
750 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
756 e6bcace5 2021-06-22 stsp for (i = 0; i < nobj; i++) {
757 e6bcace5 2021-06-22 stsp err = load_commit(&v, idset, ids[i], repo,
758 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
763 e6bcace5 2021-06-22 stsp for (i = 0; i < nobj; i++) {
764 e6bcace5 2021-06-22 stsp free(ids[i]);
767 e6bcace5 2021-06-22 stsp got_object_idset_free(idset);
768 e6bcace5 2021-06-22 stsp if (err == NULL) {
769 e6bcace5 2021-06-22 stsp *meta = v.meta;
770 e6bcace5 2021-06-22 stsp *nmeta = v.nmeta;
772 e6bcace5 2021-06-22 stsp free(v.meta);
774 e6bcace5 2021-06-22 stsp return err;
777 e6bcace5 2021-06-22 stsp const struct got_error *
778 e6bcace5 2021-06-22 stsp hwrite(FILE *f, void *buf, int len, SHA1_CTX *ctx)
782 e6bcace5 2021-06-22 stsp SHA1Update(ctx, buf, len);
783 e6bcace5 2021-06-22 stsp n = fwrite(buf, 1, len, f);
784 e6bcace5 2021-06-22 stsp if (n != len)
785 e6bcace5 2021-06-22 stsp return got_ferror(f, GOT_ERR_IO);
786 e6bcace5 2021-06-22 stsp return NULL;
789 e6bcace5 2021-06-22 stsp static void
790 e6bcace5 2021-06-22 stsp putbe32(char *b, uint32_t n)
792 e6bcace5 2021-06-22 stsp b[0] = n >> 24;
793 e6bcace5 2021-06-22 stsp b[1] = n >> 16;
794 e6bcace5 2021-06-22 stsp b[2] = n >> 8;
795 e6bcace5 2021-06-22 stsp b[3] = n >> 0;
799 e6bcace5 2021-06-22 stsp write_order_cmp(const void *pa, const void *pb)
801 e6bcace5 2021-06-22 stsp struct got_pack_meta *a, *b, *ahd, *bhd;
803 e6bcace5 2021-06-22 stsp a = *(struct got_pack_meta **)pa;
804 e6bcace5 2021-06-22 stsp b = *(struct got_pack_meta **)pb;
805 e6bcace5 2021-06-22 stsp ahd = (a->head == NULL) ? a : a->head;
806 e6bcace5 2021-06-22 stsp bhd = (b->head == NULL) ? b : b->head;
807 e6bcace5 2021-06-22 stsp if (ahd->mtime != bhd->mtime)
808 e6bcace5 2021-06-22 stsp return bhd->mtime - ahd->mtime;
809 e6bcace5 2021-06-22 stsp if (ahd != bhd)
810 e6bcace5 2021-06-22 stsp return (uintptr_t)bhd - (uintptr_t)ahd;
811 e6bcace5 2021-06-22 stsp if (a->nchain != b->nchain)
812 e6bcace5 2021-06-22 stsp return a->nchain - b->nchain;
813 e6bcace5 2021-06-22 stsp return a->mtime - b->mtime;
816 e6bcace5 2021-06-22 stsp static const struct got_error *
817 e6bcace5 2021-06-22 stsp packhdr(int *hdrlen, char *hdr, size_t bufsize, int obj_type, size_t len)
821 e6bcace5 2021-06-22 stsp *hdrlen = 0;
823 e6bcace5 2021-06-22 stsp hdr[0] = obj_type << 4;
824 e6bcace5 2021-06-22 stsp hdr[0] |= len & 0xf;
826 e6bcace5 2021-06-22 stsp for (i = 1; len != 0; i++){
827 e6bcace5 2021-06-22 stsp if (i >= bufsize)
828 e6bcace5 2021-06-22 stsp return got_error(GOT_ERR_NO_SPACE);
829 e6bcace5 2021-06-22 stsp hdr[i - 1] |= GOT_DELTA_SIZE_MORE;
830 e6bcace5 2021-06-22 stsp hdr[i] = len & GOT_DELTA_SIZE_VAL_MASK;
831 e6bcace5 2021-06-22 stsp len >>= GOT_DELTA_SIZE_SHIFT;
834 e6bcace5 2021-06-22 stsp *hdrlen = i;
835 e6bcace5 2021-06-22 stsp return NULL;
838 e6bcace5 2021-06-22 stsp static const struct got_error *
839 e6bcace5 2021-06-22 stsp append(char **p, int *len, int *sz, void *seg, int nseg)
843 e6bcace5 2021-06-22 stsp if (*len + nseg >= *sz) {
844 e6bcace5 2021-06-22 stsp while (*len + nseg >= *sz)
845 e6bcace5 2021-06-22 stsp *sz += *sz / 2;
846 e6bcace5 2021-06-22 stsp n = realloc(*p, *sz);
847 e6bcace5 2021-06-22 stsp if (n == NULL)
848 e6bcace5 2021-06-22 stsp return got_error_from_errno("realloc");
851 e6bcace5 2021-06-22 stsp memcpy(*p + *len, seg, nseg);
852 e6bcace5 2021-06-22 stsp *len += nseg;
853 e6bcace5 2021-06-22 stsp return NULL;
857 e6bcace5 2021-06-22 stsp static const struct got_error *
858 e6bcace5 2021-06-22 stsp encodedelta(int *nd, struct got_pack_meta *m, struct got_raw_object *o,
859 e6bcace5 2021-06-22 stsp off_t base_size, char **pp)
861 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
863 e6bcace5 2021-06-22 stsp unsigned char buf[16], *bp;
864 e6bcace5 2021-06-22 stsp int len, sz, i, j;
866 e6bcace5 2021-06-22 stsp struct got_delta_instruction *d;
868 e6bcace5 2021-06-22 stsp *pp = NULL;
873 e6bcace5 2021-06-22 stsp p = malloc(sz);
874 e6bcace5 2021-06-22 stsp if (p == NULL)
875 e6bcace5 2021-06-22 stsp return got_error_from_errno("malloc");
877 e6bcace5 2021-06-22 stsp /* base object size */
878 e6bcace5 2021-06-22 stsp buf[0] = base_size & GOT_DELTA_SIZE_VAL_MASK;
879 e6bcace5 2021-06-22 stsp n = base_size >> GOT_DELTA_SIZE_SHIFT;
880 e6bcace5 2021-06-22 stsp for (i = 1; n > 0; i++) {
881 e6bcace5 2021-06-22 stsp buf[i - 1] |= GOT_DELTA_SIZE_MORE;
882 e6bcace5 2021-06-22 stsp buf[i] = n & GOT_DELTA_SIZE_VAL_MASK;
883 e6bcace5 2021-06-22 stsp n >>= GOT_DELTA_SIZE_SHIFT;
885 e6bcace5 2021-06-22 stsp err = append(&p, &len, &sz, buf, i);
887 e6bcace5 2021-06-22 stsp return err;
889 e6bcace5 2021-06-22 stsp /* target object size */
890 e6bcace5 2021-06-22 stsp buf[0] = o->size & GOT_DELTA_SIZE_VAL_MASK;
891 e6bcace5 2021-06-22 stsp n = o->size >> GOT_DELTA_SIZE_SHIFT;
892 e6bcace5 2021-06-22 stsp for (i = 1; n > 0; i++) {
893 e6bcace5 2021-06-22 stsp buf[i - 1] |= GOT_DELTA_SIZE_MORE;
894 e6bcace5 2021-06-22 stsp buf[i] = n & GOT_DELTA_SIZE_VAL_MASK;
895 e6bcace5 2021-06-22 stsp n >>= GOT_DELTA_SIZE_SHIFT;
897 e6bcace5 2021-06-22 stsp err = append(&p, &len, &sz, buf, i);
899 e6bcace5 2021-06-22 stsp return err;
900 e6bcace5 2021-06-22 stsp for (j = 0; j < m->ndeltas; j++) {
901 e6bcace5 2021-06-22 stsp d = &m->deltas[j];
902 e6bcace5 2021-06-22 stsp if (d->copy) {
903 e6bcace5 2021-06-22 stsp n = d->offset;
904 e6bcace5 2021-06-22 stsp bp = &buf[1];
905 e6bcace5 2021-06-22 stsp buf[0] = GOT_DELTA_BASE_COPY;
906 e6bcace5 2021-06-22 stsp for (i = 0; i < 4; i++) {
907 e6bcace5 2021-06-22 stsp /* DELTA_COPY_OFF1 ... DELTA_COPY_OFF4 */
908 e6bcace5 2021-06-22 stsp buf[0] |= 1 << i;
909 e6bcace5 2021-06-22 stsp *bp++ = n & 0xff;
911 e6bcace5 2021-06-22 stsp if (n == 0)
915 e6bcace5 2021-06-22 stsp n = d->len;
916 e6bcace5 2021-06-22 stsp if (n != GOT_DELTA_COPY_DEFAULT_LEN) {
917 e6bcace5 2021-06-22 stsp /* DELTA_COPY_LEN1 ... DELTA_COPY_LEN3 */
918 e6bcace5 2021-06-22 stsp for (i = 0; i < 3 && n > 0; i++) {
919 e6bcace5 2021-06-22 stsp buf[0] |= 1 << (i + 4);
920 e6bcace5 2021-06-22 stsp *bp++ = n & 0xff;
924 e6bcace5 2021-06-22 stsp err = append(&p, &len, &sz, buf, bp - buf);
926 e6bcace5 2021-06-22 stsp return err;
928 e6bcace5 2021-06-22 stsp char content[128];
930 e6bcace5 2021-06-22 stsp if (fseeko(o->f, o->hdrlen + d->offset, SEEK_SET) == -1)
931 e6bcace5 2021-06-22 stsp return got_error_from_errno("fseeko");
933 e6bcace5 2021-06-22 stsp while (n != d->len) {
934 e6bcace5 2021-06-22 stsp buf[0] = (d->len - n < 127) ? d->len - n : 127;
935 e6bcace5 2021-06-22 stsp err = append(&p, &len, &sz, buf, 1);
937 e6bcace5 2021-06-22 stsp return err;
938 e6bcace5 2021-06-22 stsp r = fread(content, 1, buf[0], o->f);
939 e6bcace5 2021-06-22 stsp if (r != buf[0])
940 e6bcace5 2021-06-22 stsp return got_ferror(o->f, GOT_ERR_IO);
941 e6bcace5 2021-06-22 stsp err = append(&p, &len, &sz, content, buf[0]);
943 e6bcace5 2021-06-22 stsp return err;
944 e6bcace5 2021-06-22 stsp n += buf[0];
950 e6bcace5 2021-06-22 stsp return NULL;
954 e6bcace5 2021-06-22 stsp packoff(char *hdr, off_t off)
957 e6bcace5 2021-06-22 stsp char rbuf[8];
959 e6bcace5 2021-06-22 stsp rbuf[0] = off & GOT_DELTA_SIZE_VAL_MASK;
960 e6bcace5 2021-06-22 stsp for (i = 1; (off >>= GOT_DELTA_SIZE_SHIFT) != 0; i++) {
961 e6bcace5 2021-06-22 stsp rbuf[i] = (--off & GOT_DELTA_SIZE_VAL_MASK) |
962 e6bcace5 2021-06-22 stsp GOT_DELTA_SIZE_MORE;
966 e6bcace5 2021-06-22 stsp while (i > 0)
967 e6bcace5 2021-06-22 stsp hdr[j++] = rbuf[--i];
971 e6bcace5 2021-06-22 stsp static const struct got_error *
972 e6bcace5 2021-06-22 stsp genpack(uint8_t *pack_sha1, FILE *packfile,
973 e6bcace5 2021-06-22 stsp struct got_pack_meta **meta, int nmeta, int use_offset_deltas,
974 e6bcace5 2021-06-22 stsp struct got_repository *repo)
976 e6bcace5 2021-06-22 stsp const struct got_error *err = NULL;
977 e6bcace5 2021-06-22 stsp int i, nh, nd, pct;
978 e6bcace5 2021-06-22 stsp SHA1_CTX ctx;
979 e6bcace5 2021-06-22 stsp struct got_pack_meta *m;
980 e6bcace5 2021-06-22 stsp struct got_raw_object *raw;
981 e6bcace5 2021-06-22 stsp char *p = NULL, buf[32];
982 e6bcace5 2021-06-22 stsp size_t outlen, n;
983 e6bcace5 2021-06-22 stsp struct got_deflate_checksum csum;
985 e6bcace5 2021-06-22 stsp SHA1Init(&ctx);
986 e6bcace5 2021-06-22 stsp csum.output_sha1 = &ctx;
987 e6bcace5 2021-06-22 stsp csum.output_crc = NULL;
990 e6bcace5 2021-06-22 stsp fprintf(stderr, "generating pack\n");
992 e6bcace5 2021-06-22 stsp err = hwrite(packfile, "PACK", 4, &ctx);
994 e6bcace5 2021-06-22 stsp return err;
995 e6bcace5 2021-06-22 stsp putbe32(buf, GOT_PACKFILE_VERSION);
996 e6bcace5 2021-06-22 stsp err = hwrite(packfile, buf, 4, &ctx);
999 e6bcace5 2021-06-22 stsp putbe32(buf, nmeta);
1000 e6bcace5 2021-06-22 stsp err = hwrite(packfile, buf, 4, &ctx);
1002 e6bcace5 2021-06-22 stsp goto done;
1003 e6bcace5 2021-06-22 stsp qsort(meta, nmeta, sizeof(struct got_pack_meta *), write_order_cmp);
1004 e6bcace5 2021-06-22 stsp fprintf(stderr, "writing %d objects: 0%%", nmeta);
1005 e6bcace5 2021-06-22 stsp for (i = 0; i < nmeta; i++) {
1006 e6bcace5 2021-06-22 stsp pct = showprogress((i*100)/nmeta, pct);
1007 e6bcace5 2021-06-22 stsp m = meta[i];
1008 e6bcace5 2021-06-22 stsp m->off = ftello(packfile);
1009 e6bcace5 2021-06-22 stsp err = got_object_raw_open(&raw, repo, &m->id, 8192);
1011 e6bcace5 2021-06-22 stsp goto done;
1012 e6bcace5 2021-06-22 stsp if (m->deltas == NULL) {
1013 e6bcace5 2021-06-22 stsp err = packhdr(&nh, buf, sizeof(buf),
1014 e6bcace5 2021-06-22 stsp m->obj_type, raw->size);
1016 e6bcace5 2021-06-22 stsp goto done;
1017 e6bcace5 2021-06-22 stsp err = hwrite(packfile, buf, nh, &ctx);
1019 e6bcace5 2021-06-22 stsp goto done;
1020 e6bcace5 2021-06-22 stsp if (fseeko(raw->f, raw->hdrlen, SEEK_SET) == -1) {
1021 e6bcace5 2021-06-22 stsp err = got_error_from_errno("fseeko");
1022 e6bcace5 2021-06-22 stsp goto done;
1024 e6bcace5 2021-06-22 stsp err = got_deflate_to_file(&outlen, raw->f, packfile,
1027 e6bcace5 2021-06-22 stsp goto done;
1029 e6bcace5 2021-06-22 stsp FILE *delta_file;
1030 e6bcace5 2021-06-22 stsp struct got_raw_object *base_raw;
1031 e6bcace5 2021-06-22 stsp err = got_object_raw_open(&base_raw, repo,
1032 e6bcace5 2021-06-22 stsp &m->prev->id, 8192);
1034 e6bcace5 2021-06-22 stsp goto done;
1035 e6bcace5 2021-06-22 stsp err = encodedelta(&nd, m, raw, base_raw->size, &p);
1037 e6bcace5 2021-06-22 stsp goto done;
1038 e6bcace5 2021-06-22 stsp got_object_raw_close(base_raw);
1039 e6bcace5 2021-06-22 stsp if (use_offset_deltas && m->prev->off != 0) {
1040 e6bcace5 2021-06-22 stsp err = packhdr(&nh, buf, sizeof(buf),
1041 e6bcace5 2021-06-22 stsp GOT_OBJ_TYPE_OFFSET_DELTA, nd);
1043 e6bcace5 2021-06-22 stsp goto done;
1044 e6bcace5 2021-06-22 stsp nh += packoff(buf + nh,
1045 e6bcace5 2021-06-22 stsp m->off - m->prev->off);
1046 e6bcace5 2021-06-22 stsp err = hwrite(packfile, buf, nh, &ctx);
1048 e6bcace5 2021-06-22 stsp goto done;
1050 e6bcace5 2021-06-22 stsp err = packhdr(&nh, buf, sizeof(buf),
1051 e6bcace5 2021-06-22 stsp GOT_OBJ_TYPE_REF_DELTA, nd);
1052 e6bcace5 2021-06-22 stsp err = hwrite(packfile, buf, nh, &ctx);
1054 e6bcace5 2021-06-22 stsp goto done;
1055 e6bcace5 2021-06-22 stsp err = hwrite(packfile, m->prev->id.sha1,
1056 e6bcace5 2021-06-22 stsp sizeof(m->prev->id.sha1), &ctx);
1058 e6bcace5 2021-06-22 stsp goto done;
1060 e6bcace5 2021-06-22 stsp /* XXX need got_deflate_from_mem() */
1061 e6bcace5 2021-06-22 stsp delta_file = fmemopen(p, nd, "r");
1062 e6bcace5 2021-06-22 stsp if (delta_file == NULL) {
1063 e6bcace5 2021-06-22 stsp err = got_error_from_errno("fmemopen");
1064 e6bcace5 2021-06-22 stsp goto done;
1066 e6bcace5 2021-06-22 stsp err = got_deflate_to_file(&outlen, delta_file,
1067 e6bcace5 2021-06-22 stsp packfile, &csum);
1068 e6bcace5 2021-06-22 stsp fclose(delta_file);
1070 e6bcace5 2021-06-22 stsp goto done;
1074 e6bcace5 2021-06-22 stsp got_object_raw_close(raw);
1075 e6bcace5 2021-06-22 stsp raw = NULL;
1077 e6bcace5 2021-06-22 stsp fprintf(stderr, "\b\b\b\b100%%\n");
1078 e6bcace5 2021-06-22 stsp SHA1Final(pack_sha1, &ctx);
1079 e6bcace5 2021-06-22 stsp n = fwrite(pack_sha1, 1, SHA1_DIGEST_LENGTH, packfile);
1080 e6bcace5 2021-06-22 stsp if (n != SHA1_DIGEST_LENGTH)
1081 e6bcace5 2021-06-22 stsp err = got_ferror(packfile, GOT_ERR_IO);
1084 e6bcace5 2021-06-22 stsp return err;
1087 e6bcace5 2021-06-22 stsp const struct got_error *
1088 e6bcace5 2021-06-22 stsp got_pack_create(uint8_t *packsha1, FILE *packfile,
1089 e6bcace5 2021-06-22 stsp struct got_object_id **theirs, int ntheirs,
1090 e6bcace5 2021-06-22 stsp struct got_object_id **ours, int nours,
1091 e6bcace5 2021-06-22 stsp struct got_repository *repo, got_cancel_cb cancel_cb, void *cancel_arg)
1093 e6bcace5 2021-06-22 stsp const struct got_error *err;
1094 e6bcace5 2021-06-22 stsp struct got_pack_meta **meta;
1095 e6bcace5 2021-06-22 stsp int nmeta;
1097 e6bcace5 2021-06-22 stsp err = read_meta(&meta, &nmeta, theirs, ntheirs, ours, nours, repo,
1098 e6bcace5 2021-06-22 stsp cancel_cb, cancel_arg);
1100 e6bcace5 2021-06-22 stsp return err;
1102 e6bcace5 2021-06-22 stsp err = pick_deltas(meta, nmeta, repo, cancel_cb, cancel_arg);
1104 e6bcace5 2021-06-22 stsp goto done;
1106 e6bcace5 2021-06-22 stsp err = genpack(packsha1, packfile, meta, nmeta, 1, repo);
1108 e6bcace5 2021-06-22 stsp goto done;
1110 e6bcace5 2021-06-22 stsp free_nmeta(meta, nmeta);
1111 e6bcace5 2021-06-22 stsp return err;