| File: | got/../lib/blame.c |
| Warning: | line 139, column 3 Value stored to 'right_start' is never read |
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| 1 | /* |
| 2 | * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org> |
| 3 | * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de> |
| 4 | * |
| 5 | * Permission to use, copy, modify, and distribute this software for any |
| 6 | * purpose with or without fee is hereby granted, provided that the above |
| 7 | * copyright notice and this permission notice appear in all copies. |
| 8 | * |
| 9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 16 | */ |
| 17 | |
| 18 | #include <sys/queue.h> |
| 19 | #include <sys/mman.h> |
| 20 | #include <sys/stat.h> |
| 21 | |
| 22 | #include <errno(*__errno()).h> |
| 23 | #include <sha1.h> |
| 24 | #include <string.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <time.h> |
| 28 | #include <limits.h> |
| 29 | #include <util.h> |
| 30 | #include <zlib.h> |
| 31 | |
| 32 | #include "got_error.h" |
| 33 | #include "got_object.h" |
| 34 | #include "got_cancel.h" |
| 35 | #include "got_blame.h" |
| 36 | #include "got_commit_graph.h" |
| 37 | #include "got_opentemp.h" |
| 38 | |
| 39 | #include "got_lib_inflate.h" |
| 40 | #include "got_lib_delta.h" |
| 41 | #include "got_lib_object.h" |
| 42 | #include "got_lib_diff.h" |
| 43 | |
| 44 | #ifndef MAX |
| 45 | #define MAX(_a,_b)((_a) > (_b) ? (_a) : (_b)) ((_a) > (_b) ? (_a) : (_b)) |
| 46 | #endif |
| 47 | |
| 48 | struct got_blame_line { |
| 49 | int annotated; |
| 50 | struct got_object_id id; |
| 51 | }; |
| 52 | |
| 53 | struct got_blame { |
| 54 | struct diff_config *cfg; |
| 55 | int nlines; /* number of lines in file being blamed */ |
| 56 | int nannotated; /* number of lines already annotated */ |
| 57 | struct got_blame_line *lines; /* one per line */ |
| 58 | int ncommits; |
| 59 | |
| 60 | /* |
| 61 | * These change with every traversed commit. After diffing |
| 62 | * commits N:N-1, in preparation for diffing commits N-1:N-2, |
| 63 | * data for commit N is retained and flipped into data for N-1. |
| 64 | * |
| 65 | */ |
| 66 | FILE *f1; /* older version from commit N-1. */ |
| 67 | FILE *f2; /* newer version from commit N. */ |
| 68 | unsigned char *map1; |
| 69 | unsigned char *map2; |
| 70 | off_t size1; |
| 71 | off_t size2; |
| 72 | int nlines1; |
| 73 | int nlines2; |
| 74 | off_t *line_offsets1; |
| 75 | off_t *line_offsets2; |
| 76 | |
| 77 | /* |
| 78 | * Map line numbers of an older version of the file to valid line |
| 79 | * numbers in the version of the file being blamed. This map is |
| 80 | * updated with each commit we traverse throughout the file's history. |
| 81 | * Lines mapped to -1 do not correspond to any line in the version |
| 82 | * being blamed. |
| 83 | */ |
| 84 | int *linemap1; |
| 85 | int *linemap2; |
| 86 | |
| 87 | struct diff_data *data1; |
| 88 | struct diff_data *data2; |
| 89 | }; |
| 90 | |
| 91 | static const struct got_error * |
| 92 | annotate_line(struct got_blame *blame, int lineno, struct got_object_id *id, |
| 93 | const struct got_error *(*cb)(void *, int, int, struct got_object_id *), |
| 94 | void *arg) |
| 95 | { |
| 96 | const struct got_error *err = NULL((void *)0); |
| 97 | struct got_blame_line *line; |
| 98 | |
| 99 | if (lineno < 0 || lineno >= blame->nlines) |
| 100 | return NULL((void *)0); |
| 101 | |
| 102 | line = &blame->lines[lineno]; |
| 103 | if (line->annotated) |
| 104 | return NULL((void *)0); |
| 105 | |
| 106 | memcpy(&line->id, id, sizeof(line->id)); |
| 107 | line->annotated = 1; |
| 108 | blame->nannotated++; |
| 109 | if (cb) |
| 110 | err = cb(arg, blame->nlines, lineno + 1, id); |
| 111 | return err; |
| 112 | } |
| 113 | |
| 114 | static const struct got_error * |
| 115 | blame_changes(struct got_blame *blame, struct diff_result *diff_result, |
| 116 | struct got_object_id *commit_id, |
| 117 | const struct got_error *(*cb)(void *, int, int, struct got_object_id *), |
| 118 | void *arg) |
| 119 | { |
| 120 | const struct got_error *err = NULL((void *)0); |
| 121 | int i; |
| 122 | int idx1 = 0, idx2 = 0; |
| 123 | |
| 124 | for (i = 0; i < diff_result->chunks.len && |
| 125 | blame->nannotated < blame->nlines; i++) { |
| 126 | struct diff_chunk *c = diff_chunk_get(diff_result, i); |
| 127 | unsigned int left_start, left_count; |
| 128 | unsigned int right_start, right_count; |
| 129 | int j; |
| 130 | |
| 131 | /* |
| 132 | * We do not need to worry about idx1/idx2 growing out |
| 133 | * of bounds because the diff implementation ensures |
| 134 | * that chunk ranges never exceed the number of lines |
| 135 | * in the left/right input files. |
| 136 | */ |
| 137 | left_start = diff_chunk_get_left_start(c, diff_result, 0); |
| 138 | left_count = diff_chunk_get_left_count(c); |
| 139 | right_start = diff_chunk_get_right_start(c, diff_result, 0); |
Value stored to 'right_start' is never read | |
| 140 | right_count = diff_chunk_get_right_count(c); |
| 141 | |
| 142 | if (left_count == right_count) { |
| 143 | for (j = 0; j < left_count; j++) { |
| 144 | blame->linemap1[idx1++] = |
| 145 | blame->linemap2[idx2++]; |
| 146 | } |
| 147 | continue; |
| 148 | } |
| 149 | |
| 150 | if (right_count == 0) { |
| 151 | for (j = 0; j < left_count; j++) { |
| 152 | blame->linemap1[idx1++] = -1; |
| 153 | } |
| 154 | continue; |
| 155 | } |
| 156 | |
| 157 | for (j = 0; j < right_count; j++) { |
| 158 | int ln = blame->linemap2[idx2++]; |
| 159 | err = annotate_line(blame, ln, commit_id, cb, arg); |
| 160 | if (err) |
| 161 | return err; |
| 162 | if (blame->nlines == blame->nannotated) |
| 163 | break; |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | return NULL((void *)0); |
| 168 | } |
| 169 | |
| 170 | static const struct got_error * |
| 171 | blame_prepare_file(FILE *f, unsigned char **p, off_t *size, |
| 172 | int *nlines, off_t **line_offsets, struct diff_data *diff_data, |
| 173 | const struct diff_config *cfg, struct got_blob_object *blob) |
| 174 | { |
| 175 | const struct got_error *err = NULL((void *)0); |
| 176 | int diff_flags = 0, rc; |
| 177 | |
| 178 | err = got_object_blob_dump_to_file(size, nlines, line_offsets, |
| 179 | f, blob); |
| 180 | if (err) |
| 181 | return err; |
| 182 | |
| 183 | #ifndef GOT_DIFF_NO_MMAP |
| 184 | *p = mmap(NULL((void *)0), *size, PROT_READ0x01, MAP_PRIVATE0x0002, fileno(f)(!__isthreaded ? ((f)->_file) : (fileno)(f)), 0); |
| 185 | if (*p == MAP_FAILED((void *)-1)) |
| 186 | #endif |
| 187 | *p = NULL((void *)0); /* fall back on file I/O */ |
| 188 | |
| 189 | /* Allow blaming lines in binary files even though it's useless. */ |
| 190 | diff_flags |= DIFF_FLAG_FORCE_TEXT_DATA0x00000004; |
| 191 | |
| 192 | rc = diff_atomize_file(diff_data, cfg, f, *p, *size, diff_flags); |
| 193 | if (rc) |
| 194 | return got_error_set_errno(rc, "diff_atomize_file"); |
| 195 | |
| 196 | return NULL((void *)0); |
| 197 | } |
| 198 | |
| 199 | static const struct got_error * |
| 200 | blame_commit(struct got_blame *blame, struct got_object_id *id, |
| 201 | const char *path, struct got_repository *repo, |
| 202 | const struct got_error *(*cb)(void *, int, int, struct got_object_id *), |
| 203 | void *arg) |
| 204 | { |
| 205 | const struct got_error *err = NULL((void *)0); |
| 206 | struct got_commit_object *commit = NULL((void *)0); |
| 207 | struct got_object_qid *pid = NULL((void *)0); |
| 208 | struct got_object_id *pblob_id = NULL((void *)0); |
| 209 | struct got_blob_object *pblob = NULL((void *)0); |
| 210 | struct diff_result *diff_result = NULL((void *)0); |
| 211 | |
| 212 | err = got_object_open_as_commit(&commit, repo, id); |
| 213 | if (err) |
| 214 | return err; |
| 215 | |
| 216 | pid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit))((got_object_commit_get_parent_ids(commit))->sqh_first); |
| 217 | if (pid == NULL((void *)0)) { |
| 218 | got_object_commit_close(commit); |
| 219 | return NULL((void *)0); |
| 220 | } |
| 221 | |
| 222 | err = got_object_id_by_path(&pblob_id, repo, pid->id, path); |
| 223 | if (err) { |
| 224 | if (err->code == GOT_ERR_NO_TREE_ENTRY50) |
| 225 | err = NULL((void *)0); |
| 226 | goto done; |
| 227 | } |
| 228 | |
| 229 | err = got_object_open_as_blob(&pblob, repo, pblob_id, 8192); |
| 230 | if (err) |
| 231 | goto done; |
| 232 | |
| 233 | blame->f1 = got_opentemp(); |
| 234 | if (blame->f1 == NULL((void *)0)) { |
| 235 | err = got_error_from_errno("got_opentemp"); |
| 236 | goto done; |
| 237 | } |
| 238 | |
| 239 | err = blame_prepare_file(blame->f1, &blame->map1, &blame->size1, |
| 240 | &blame->nlines1, &blame->line_offsets1, blame->data1, |
| 241 | blame->cfg, pblob); |
| 242 | if (err) |
| 243 | goto done; |
| 244 | |
| 245 | diff_result = diff_main(blame->cfg, blame->data1, blame->data2); |
| 246 | if (diff_result == NULL((void *)0)) { |
| 247 | err = got_error_set_errno(ENOMEM12, "malloc"); |
| 248 | goto done; |
| 249 | } |
| 250 | if (diff_result->rc != DIFF_RC_OK0) { |
| 251 | err = got_error_set_errno(diff_result->rc, "diff"); |
| 252 | goto done; |
| 253 | } |
| 254 | if (diff_result->chunks.len > 0) { |
| 255 | if (blame->nlines1 > 0) { |
| 256 | blame->linemap1 = calloc(blame->nlines1, |
| 257 | sizeof(*blame->linemap1)); |
| 258 | if (blame->linemap1 == NULL((void *)0)) { |
| 259 | err = got_error_from_errno("malloc"); |
| 260 | goto done; |
| 261 | } |
| 262 | } |
| 263 | err = blame_changes(blame, diff_result, id, cb, arg); |
| 264 | if (err) |
| 265 | goto done; |
| 266 | } else if (cb) |
| 267 | err = cb(arg, blame->nlines, -1, id); |
| 268 | done: |
| 269 | if (diff_result) |
| 270 | diff_result_free(diff_result); |
| 271 | if (commit) |
| 272 | got_object_commit_close(commit); |
| 273 | free(pblob_id); |
| 274 | if (pblob) |
| 275 | got_object_blob_close(pblob); |
| 276 | return err; |
| 277 | } |
| 278 | |
| 279 | static const struct got_error * |
| 280 | blame_close(struct got_blame *blame) |
| 281 | { |
| 282 | const struct got_error *err = NULL((void *)0); |
| 283 | |
| 284 | diff_data_free(blame->data1); |
| 285 | free(blame->data1); |
| 286 | diff_data_free(blame->data2); |
| 287 | free(blame->data2); |
| 288 | if (blame->map1) { |
| 289 | if (munmap(blame->map1, blame->size1) == -1 && err == NULL((void *)0)) |
| 290 | err = got_error_from_errno("munmap"); |
| 291 | } |
| 292 | if (blame->map2) { |
| 293 | if (munmap(blame->map2, blame->size2) == -1 && err == NULL((void *)0)) |
| 294 | err = got_error_from_errno("munmap"); |
| 295 | } |
| 296 | if (blame->f1 && fclose(blame->f1) == EOF(-1) && err == NULL((void *)0)) |
| 297 | err = got_error_from_errno("fclose"); |
| 298 | if (blame->f2 && fclose(blame->f2) == EOF(-1) && err == NULL((void *)0)) |
| 299 | err = got_error_from_errno("fclose"); |
| 300 | free(blame->lines); |
| 301 | free(blame->line_offsets1); |
| 302 | free(blame->line_offsets2); |
| 303 | free(blame->linemap1); |
| 304 | free(blame->linemap2); |
| 305 | free(blame->cfg); |
| 306 | free(blame); |
| 307 | return err; |
| 308 | } |
| 309 | |
| 310 | static int |
| 311 | atomize_file(struct diff_data *d, FILE *f, off_t filesize, int nlines, |
| 312 | off_t *line_offsets) |
| 313 | { |
| 314 | int i, rc = DIFF_RC_OK0; |
| 315 | int embedded_nul = 0; |
| 316 | |
| 317 | ARRAYLIST_INIT(d->atoms, nlines)do { (d->atoms).head = ((void *)0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d->atoms).alloc_blocksize = nlines; } while(0); |
| 318 | |
| 319 | for (i = 0; i < nlines; i++) { |
| 320 | struct diff_atom *atom; |
| 321 | off_t len, pos = line_offsets[i]; |
| 322 | unsigned int hash = 0; |
| 323 | int j; |
| 324 | |
| 325 | ARRAYLIST_ADD(atom, d->atoms)do { if ((d->atoms).len && !(d->atoms).allocated ) { atom = ((void *)0); break; } if ((d->atoms).head == (( void *)0) || (d->atoms).allocated < (d->atoms).len + 1) { (d->atoms).p = recallocarray((d->atoms).head, (d-> atoms).len, (d->atoms).allocated + ((d->atoms).alloc_blocksize ? : 8), sizeof(*(d->atoms).head)); if ((d->atoms).p == ((void *)0)) { atom = ((void *)0); break; } (d->atoms).allocated += (d->atoms).alloc_blocksize ? : 8; (d->atoms).head = (d->atoms).p; (d->atoms).p = ((void *)0); }; if ((d-> atoms).head == ((void *)0) || (d->atoms).allocated < (d ->atoms).len + 1) { atom = ((void *)0); break; } (atom) = & (d->atoms).head[(d->atoms).len]; (d->atoms).len++; } while (0); |
| 326 | if (atom == NULL((void *)0)) { |
| 327 | rc = errno(*__errno()); |
| 328 | break; |
| 329 | } |
| 330 | |
| 331 | if (i < nlines - 1) |
| 332 | len = line_offsets[i + 1] - pos; |
| 333 | else |
| 334 | len = filesize - pos; |
| 335 | |
| 336 | if (fseeko(f, pos, SEEK_SET0) == -1) { |
| 337 | rc = errno(*__errno()); |
| 338 | break; |
| 339 | } |
| 340 | for (j = 0; j < len; j++) { |
| 341 | int c = fgetc(f); |
| 342 | if (c == EOF(-1)) { |
| 343 | if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof )(f))) |
| 344 | rc = EIO5; /* unexpected EOF */ |
| 345 | else |
| 346 | rc = errno(*__errno()); |
| 347 | goto done; |
| 348 | } |
| 349 | |
| 350 | hash = diff_atom_hash_update(hash, (unsigned char)c); |
| 351 | |
| 352 | if (c == '\0') |
| 353 | embedded_nul = 1; |
| 354 | |
| 355 | } |
| 356 | *atom = (struct diff_atom){ |
| 357 | .root = d, |
| 358 | .pos = pos, |
| 359 | .at = NULL((void *)0), /* atom data is not memory-mapped */ |
| 360 | .len = len, |
| 361 | .hash = hash, |
| 362 | }; |
| 363 | } |
| 364 | |
| 365 | /* File are considered binary if they contain embedded '\0' bytes. */ |
| 366 | if (embedded_nul) |
| 367 | d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA0x00000001; |
| 368 | done: |
| 369 | if (rc) |
| 370 | ARRAYLIST_FREE(d->atoms)do { if ((d->atoms).head && (d->atoms).allocated ) free((d->atoms).head); do { (d->atoms).head = ((void * )0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d-> atoms).alloc_blocksize = (d->atoms).alloc_blocksize; } while (0); } while(0); |
| 371 | |
| 372 | return rc; |
| 373 | } |
| 374 | |
| 375 | static int |
| 376 | atomize_file_mmap(struct diff_data *d, unsigned char *p, |
| 377 | off_t filesize, int nlines, off_t *line_offsets) |
| 378 | { |
| 379 | int i, rc = DIFF_RC_OK0; |
| 380 | int embedded_nul = 0; |
| 381 | |
| 382 | ARRAYLIST_INIT(d->atoms, nlines)do { (d->atoms).head = ((void *)0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d->atoms).alloc_blocksize = nlines; } while(0); |
| 383 | |
| 384 | for (i = 0; i < nlines; i++) { |
| 385 | struct diff_atom *atom; |
| 386 | off_t len, pos = line_offsets[i]; |
| 387 | unsigned int hash = 0; |
| 388 | int j; |
| 389 | |
| 390 | ARRAYLIST_ADD(atom, d->atoms)do { if ((d->atoms).len && !(d->atoms).allocated ) { atom = ((void *)0); break; } if ((d->atoms).head == (( void *)0) || (d->atoms).allocated < (d->atoms).len + 1) { (d->atoms).p = recallocarray((d->atoms).head, (d-> atoms).len, (d->atoms).allocated + ((d->atoms).alloc_blocksize ? : 8), sizeof(*(d->atoms).head)); if ((d->atoms).p == ((void *)0)) { atom = ((void *)0); break; } (d->atoms).allocated += (d->atoms).alloc_blocksize ? : 8; (d->atoms).head = (d->atoms).p; (d->atoms).p = ((void *)0); }; if ((d-> atoms).head == ((void *)0) || (d->atoms).allocated < (d ->atoms).len + 1) { atom = ((void *)0); break; } (atom) = & (d->atoms).head[(d->atoms).len]; (d->atoms).len++; } while (0); |
| 391 | if (atom == NULL((void *)0)) { |
| 392 | rc = errno(*__errno()); |
| 393 | break; |
| 394 | } |
| 395 | |
| 396 | if (i < nlines - 1) |
| 397 | len = line_offsets[i + 1] - pos; |
| 398 | else |
| 399 | len = filesize - pos; |
| 400 | |
| 401 | for (j = 0; j < len; j++) |
| 402 | hash = diff_atom_hash_update(hash, p[pos + j]); |
| 403 | |
| 404 | if (!embedded_nul && memchr(&p[pos], '\0', len) != NULL((void *)0)) |
| 405 | embedded_nul = 1; |
| 406 | |
| 407 | *atom = (struct diff_atom){ |
| 408 | .root = d, |
| 409 | .pos = pos, |
| 410 | .at = &p[pos], |
| 411 | .len = len, |
| 412 | .hash = hash, |
| 413 | }; |
| 414 | } |
| 415 | |
| 416 | /* File are considered binary if they contain embedded '\0' bytes. */ |
| 417 | if (embedded_nul) |
| 418 | d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA0x00000001; |
| 419 | |
| 420 | if (rc) |
| 421 | ARRAYLIST_FREE(d->atoms)do { if ((d->atoms).head && (d->atoms).allocated ) free((d->atoms).head); do { (d->atoms).head = ((void * )0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d-> atoms).alloc_blocksize = (d->atoms).alloc_blocksize; } while (0); } while(0); |
| 422 | |
| 423 | return rc; |
| 424 | } |
| 425 | |
| 426 | /* Implements diff_atomize_func_t */ |
| 427 | static int |
| 428 | blame_atomize_file(void *arg, struct diff_data *d) |
| 429 | { |
| 430 | struct got_blame *blame = arg; |
| 431 | |
| 432 | if (d->f == blame->f1) { |
| 433 | if (blame->map1) |
| 434 | return atomize_file_mmap(d, blame->map1, |
| 435 | blame->size1, blame->nlines1, |
| 436 | blame->line_offsets1); |
| 437 | else |
| 438 | return atomize_file(d, blame->f1, blame->size1, |
| 439 | blame->nlines1, blame->line_offsets1); |
| 440 | } else if (d->f == blame->f2) { |
| 441 | if (d->atoms.len > 0) { |
| 442 | /* Re-use data from previous commit. */ |
| 443 | return DIFF_RC_OK0; |
| 444 | } |
| 445 | if (blame->map2) |
| 446 | return atomize_file_mmap(d, blame->map2, |
| 447 | blame->size2, blame->nlines2, |
| 448 | blame->line_offsets2); |
| 449 | else |
| 450 | return atomize_file(d, blame->f2, blame->size2, |
| 451 | blame->nlines2, blame->line_offsets2); |
| 452 | } |
| 453 | |
| 454 | return DIFF_RC_OK0; |
| 455 | } |
| 456 | |
| 457 | static const struct got_error * |
| 458 | close_file2_and_reuse_file1(struct got_blame *blame) |
| 459 | { |
| 460 | struct diff_data *d; |
| 461 | |
| 462 | free(blame->line_offsets2); |
| 463 | blame->line_offsets2 = blame->line_offsets1; |
| 464 | blame->line_offsets1 = NULL((void *)0); |
| 465 | |
| 466 | free(blame->linemap2); |
| 467 | blame->linemap2 = blame->linemap1; |
| 468 | blame->linemap1 = NULL((void *)0); |
| 469 | |
| 470 | if (blame->map2) { |
| 471 | if (munmap(blame->map2, blame->size2) == -1) |
| 472 | return got_error_from_errno("munmap"); |
| 473 | blame->map2 = blame->map1; |
| 474 | blame->map1 = NULL((void *)0); |
| 475 | |
| 476 | } |
| 477 | blame->size2 = blame->size1; |
| 478 | blame->size1 = 0; |
| 479 | |
| 480 | if (fclose(blame->f2) == EOF(-1)) |
| 481 | return got_error_from_errno("fclose"); |
| 482 | blame->f2 = blame->f1; |
| 483 | blame->f1 = NULL((void *)0); |
| 484 | |
| 485 | blame->nlines2 = blame->nlines1; |
| 486 | blame->nlines1 = 0; |
| 487 | |
| 488 | diff_data_free(blame->data2); /* does not free pointer itself */ |
| 489 | memset(blame->data2, 0, sizeof(*blame->data2)); |
| 490 | d = blame->data2; |
| 491 | blame->data2 = blame->data1; |
| 492 | blame->data1 = d; |
| 493 | |
| 494 | return NULL((void *)0); |
| 495 | } |
| 496 | |
| 497 | static const struct got_error * |
| 498 | blame_open(struct got_blame **blamep, const char *path, |
| 499 | struct got_object_id *start_commit_id, struct got_repository *repo, |
| 500 | const struct got_error *(*cb)(void *, int, int, struct got_object_id *), |
| 501 | void *arg, got_cancel_cb cancel_cb, void *cancel_arg) |
| 502 | { |
| 503 | const struct got_error *err = NULL((void *)0); |
| 504 | struct got_object_id *obj_id = NULL((void *)0); |
| 505 | struct got_blob_object *blob = NULL((void *)0); |
| 506 | struct got_blame *blame = NULL((void *)0); |
| 507 | struct got_object_id *id = NULL((void *)0); |
| 508 | int lineno; |
| 509 | struct got_commit_graph *graph = NULL((void *)0); |
| 510 | |
| 511 | *blamep = NULL((void *)0); |
| 512 | |
| 513 | err = got_object_id_by_path(&obj_id, repo, start_commit_id, path); |
| 514 | if (err) |
| 515 | goto done; |
| 516 | |
| 517 | err = got_object_open_as_blob(&blob, repo, obj_id, 8192); |
| 518 | if (err) |
| 519 | goto done; |
| 520 | |
| 521 | blame = calloc(1, sizeof(*blame)); |
| 522 | if (blame == NULL((void *)0)) { |
| 523 | err = got_error_from_errno("calloc"); |
| 524 | goto done; |
| 525 | } |
| 526 | |
| 527 | blame->data1 = calloc(1, sizeof(*blame->data1)); |
| 528 | if (blame->data1 == NULL((void *)0)) { |
| 529 | err = got_error_from_errno("calloc"); |
| 530 | goto done; |
| 531 | } |
| 532 | blame->data2 = calloc(1, sizeof(*blame->data2)); |
| 533 | if (blame->data2 == NULL((void *)0)) { |
| 534 | err = got_error_from_errno("calloc"); |
| 535 | goto done; |
| 536 | } |
| 537 | |
| 538 | blame->f2 = got_opentemp(); |
| 539 | if (blame->f2 == NULL((void *)0)) { |
| 540 | err = got_error_from_errno("got_opentemp"); |
| 541 | goto done; |
| 542 | } |
| 543 | err = got_diff_get_config(&blame->cfg, GOT_DIFF_ALGORITHM_PATIENCE, |
| 544 | blame_atomize_file, blame); |
| 545 | if (err) |
| 546 | goto done; |
| 547 | |
| 548 | err = blame_prepare_file(blame->f2, &blame->map2, &blame->size2, |
| 549 | &blame->nlines2, &blame->line_offsets2, blame->data2, |
| 550 | blame->cfg, blob); |
| 551 | blame->nlines = blame->nlines2; |
| 552 | if (err || blame->nlines == 0) |
| 553 | goto done; |
| 554 | |
| 555 | got_object_blob_close(blob); |
| 556 | blob = NULL((void *)0); |
| 557 | |
| 558 | /* Don't include \n at EOF in the blame line count. */ |
| 559 | if (blame->line_offsets2[blame->nlines - 1] == blame->size2) |
| 560 | blame->nlines--; |
| 561 | |
| 562 | blame->lines = calloc(blame->nlines, sizeof(*blame->lines)); |
| 563 | if (blame->lines == NULL((void *)0)) { |
| 564 | err = got_error_from_errno("calloc"); |
| 565 | goto done; |
| 566 | } |
| 567 | |
| 568 | blame->linemap2 = calloc(blame->nlines2, sizeof(*blame->linemap2)); |
| 569 | if (blame->linemap2 == NULL((void *)0)) { |
| 570 | err = got_error_from_errno("calloc"); |
| 571 | goto done; |
| 572 | } |
| 573 | for (lineno = 0; lineno < blame->nlines2; lineno++) |
| 574 | blame->linemap2[lineno] = lineno; |
| 575 | |
| 576 | err = got_commit_graph_open(&graph, path, 1); |
| 577 | if (err) |
| 578 | goto done; |
| 579 | |
| 580 | err = got_commit_graph_iter_start(graph, start_commit_id, repo, |
| 581 | cancel_cb, cancel_arg); |
| 582 | if (err) |
| 583 | goto done; |
| 584 | for (;;) { |
| 585 | struct got_object_id *next_id; |
| 586 | err = got_commit_graph_iter_next(&next_id, graph, repo, |
| 587 | cancel_cb, cancel_arg); |
| 588 | if (err) { |
| 589 | if (err->code == GOT_ERR_ITER_COMPLETED46) { |
| 590 | err = NULL((void *)0); |
| 591 | break; |
| 592 | } |
| 593 | goto done; |
| 594 | } |
| 595 | if (next_id) { |
| 596 | id = next_id; |
| 597 | err = blame_commit(blame, id, path, repo, cb, arg); |
| 598 | if (err) { |
| 599 | if (err->code == GOT_ERR_ITER_COMPLETED46) |
| 600 | err = NULL((void *)0); |
| 601 | goto done; |
| 602 | } |
| 603 | if (blame->nannotated == blame->nlines) |
| 604 | break; |
| 605 | |
| 606 | err = close_file2_and_reuse_file1(blame); |
| 607 | if (err) |
| 608 | goto done; |
| 609 | } |
| 610 | } |
| 611 | |
| 612 | if (id && blame->nannotated < blame->nlines) { |
| 613 | /* Annotate remaining non-annotated lines with last commit. */ |
| 614 | for (lineno = 0; lineno < blame->nlines; lineno++) { |
| 615 | err = annotate_line(blame, lineno, id, cb, arg); |
| 616 | if (err) |
| 617 | goto done; |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | done: |
| 622 | if (graph) |
| 623 | got_commit_graph_close(graph); |
| 624 | free(obj_id); |
| 625 | if (blob) |
| 626 | got_object_blob_close(blob); |
| 627 | if (err) { |
| 628 | if (blame) |
| 629 | blame_close(blame); |
| 630 | } else |
| 631 | *blamep = blame; |
| 632 | |
| 633 | return err; |
| 634 | } |
| 635 | |
| 636 | const struct got_error * |
| 637 | got_blame(const char *path, struct got_object_id *commit_id, |
| 638 | struct got_repository *repo, |
| 639 | const struct got_error *(*cb)(void *, int, int, struct got_object_id *), |
| 640 | void *arg, got_cancel_cb cancel_cb, void* cancel_arg) |
| 641 | { |
| 642 | const struct got_error *err = NULL((void *)0), *close_err = NULL((void *)0); |
| 643 | struct got_blame *blame; |
| 644 | char *abspath; |
| 645 | |
| 646 | if (asprintf(&abspath, "%s%s", path[0] == '/' ? "" : "/", path) == -1) |
| 647 | return got_error_from_errno2("asprintf", path); |
| 648 | |
| 649 | err = blame_open(&blame, abspath, commit_id, repo, cb, arg, |
| 650 | cancel_cb, cancel_arg); |
| 651 | free(abspath); |
| 652 | if (blame) |
| 653 | close_err = blame_close(blame); |
| 654 | return err ? err : close_err; |
| 655 | } |