2 * Copyright (C) the libgit2 contributors. All rights reserved.
4 * This file is part of libgit2, distributed under the GNU GPL v2 with
5 * a Linking Exception. For full terms see the included COPYING file.
10 #include "diff_generate.h"
11 #include "diff_file.h"
12 #include "diff_driver.h"
13 #include "patch_generate.h"
14 #include "diff_xdiff.h"
19 static void diff_output_init(
20 git_patch_generated_output
*, const git_diff_options
*, git_diff_file_cb
,
21 git_diff_binary_cb
, git_diff_hunk_cb
, git_diff_line_cb
, void*);
23 static void diff_output_to_patch(
24 git_patch_generated_output
*, git_patch_generated
*);
26 static void patch_generated_free(git_patch
*p
)
28 git_patch_generated
*patch
= (git_patch_generated
*)p
;
30 git_array_clear(patch
->base
.lines
);
31 git_array_clear(patch
->base
.hunks
);
33 git__free((char *)patch
->base
.binary
.old_file
.data
);
34 git__free((char *)patch
->base
.binary
.new_file
.data
);
36 git_diff_file_content__clear(&patch
->ofile
);
37 git_diff_file_content__clear(&patch
->nfile
);
39 git_diff_free(patch
->diff
); /* decrements refcount */
42 git_pool_clear(&patch
->flattened
);
44 git__free((char *)patch
->base
.diff_opts
.old_prefix
);
45 git__free((char *)patch
->base
.diff_opts
.new_prefix
);
47 if (patch
->flags
& GIT_PATCH_GENERATED_ALLOCATED
)
51 static void patch_generated_update_binary(git_patch_generated
*patch
)
53 if ((patch
->base
.delta
->flags
& DIFF_FLAGS_KNOWN_BINARY
) != 0)
56 if ((patch
->ofile
.file
->flags
& GIT_DIFF_FLAG_BINARY
) != 0 ||
57 (patch
->nfile
.file
->flags
& GIT_DIFF_FLAG_BINARY
) != 0)
58 patch
->base
.delta
->flags
|= GIT_DIFF_FLAG_BINARY
;
60 else if (patch
->ofile
.file
->size
> GIT_XDIFF_MAX_SIZE
||
61 patch
->nfile
.file
->size
> GIT_XDIFF_MAX_SIZE
)
62 patch
->base
.delta
->flags
|= GIT_DIFF_FLAG_BINARY
;
64 else if ((patch
->ofile
.file
->flags
& DIFF_FLAGS_NOT_BINARY
) != 0 &&
65 (patch
->nfile
.file
->flags
& DIFF_FLAGS_NOT_BINARY
) != 0)
66 patch
->base
.delta
->flags
|= GIT_DIFF_FLAG_NOT_BINARY
;
69 static void patch_generated_init_common(git_patch_generated
*patch
)
71 patch
->base
.free_fn
= patch_generated_free
;
73 patch_generated_update_binary(patch
);
75 patch
->flags
|= GIT_PATCH_GENERATED_INITIALIZED
;
78 git_diff_addref(patch
->diff
);
81 static int patch_generated_normalize_options(
82 git_diff_options
*out
,
83 const git_diff_options
*opts
)
86 GITERR_CHECK_VERSION(opts
, GIT_DIFF_OPTIONS_VERSION
, "git_diff_options");
87 memcpy(out
, opts
, sizeof(git_diff_options
));
89 git_diff_options default_opts
= GIT_DIFF_OPTIONS_INIT
;
90 memcpy(out
, &default_opts
, sizeof(git_diff_options
));
93 out
->old_prefix
= opts
&& opts
->old_prefix
?
94 git__strdup(opts
->old_prefix
) :
95 git__strdup(DIFF_OLD_PREFIX_DEFAULT
);
97 out
->new_prefix
= opts
&& opts
->new_prefix
?
98 git__strdup(opts
->new_prefix
) :
99 git__strdup(DIFF_NEW_PREFIX_DEFAULT
);
101 GITERR_CHECK_ALLOC(out
->old_prefix
);
102 GITERR_CHECK_ALLOC(out
->new_prefix
);
107 static int patch_generated_init(
108 git_patch_generated
*patch
, git_diff
*diff
, size_t delta_index
)
112 memset(patch
, 0, sizeof(*patch
));
115 patch
->base
.repo
= diff
->repo
;
116 patch
->base
.delta
= git_vector_get(&diff
->deltas
, delta_index
);
117 patch
->delta_index
= delta_index
;
119 if ((error
= patch_generated_normalize_options(
120 &patch
->base
.diff_opts
, &diff
->opts
)) < 0 ||
121 (error
= git_diff_file_content__init_from_diff(
122 &patch
->ofile
, diff
, patch
->base
.delta
, true)) < 0 ||
123 (error
= git_diff_file_content__init_from_diff(
124 &patch
->nfile
, diff
, patch
->base
.delta
, false)) < 0)
127 patch_generated_init_common(patch
);
132 static int patch_generated_alloc_from_diff(
133 git_patch_generated
**out
, git_diff
*diff
, size_t delta_index
)
136 git_patch_generated
*patch
= git__calloc(1, sizeof(git_patch_generated
));
137 GITERR_CHECK_ALLOC(patch
);
139 if (!(error
= patch_generated_init(patch
, diff
, delta_index
))) {
140 patch
->flags
|= GIT_PATCH_GENERATED_ALLOCATED
;
141 GIT_REFCOUNT_INC(patch
);
151 GIT_INLINE(bool) should_skip_binary(git_patch_generated
*patch
, git_diff_file
*file
)
153 if ((patch
->base
.diff_opts
.flags
& GIT_DIFF_SHOW_BINARY
) != 0)
156 return (file
->flags
& GIT_DIFF_FLAG_BINARY
) != 0;
159 static bool patch_generated_diffable(git_patch_generated
*patch
)
163 if (patch
->base
.delta
->status
== GIT_DELTA_UNMODIFIED
)
166 /* if we've determined this to be binary (and we are not showing binary
167 * data) then we have skipped loading the map data. instead, query the
170 if ((patch
->base
.delta
->flags
& GIT_DIFF_FLAG_BINARY
) != 0 &&
171 (patch
->base
.diff_opts
.flags
& GIT_DIFF_SHOW_BINARY
) == 0) {
172 olen
= (size_t)patch
->ofile
.file
->size
;
173 nlen
= (size_t)patch
->nfile
.file
->size
;
175 olen
= patch
->ofile
.map
.len
;
176 nlen
= patch
->nfile
.map
.len
;
179 /* if both sides are empty, files are identical */
183 /* otherwise, check the file sizes and the oid */
184 return (olen
!= nlen
||
185 !git_oid_equal(&patch
->ofile
.file
->id
, &patch
->nfile
.file
->id
));
188 static int patch_generated_load(git_patch_generated
*patch
, git_patch_generated_output
*output
)
191 bool incomplete_data
;
193 if ((patch
->flags
& GIT_PATCH_GENERATED_LOADED
) != 0)
196 /* if no hunk and data callbacks and user doesn't care if data looks
197 * binary, then there is no need to actually load the data
199 if ((patch
->ofile
.opts_flags
& GIT_DIFF_SKIP_BINARY_CHECK
) != 0 &&
200 output
&& !output
->binary_cb
&& !output
->hunk_cb
&& !output
->data_cb
)
204 (((patch
->ofile
.flags
& GIT_DIFF_FLAG__NO_DATA
) != 0 ||
205 (patch
->ofile
.file
->flags
& GIT_DIFF_FLAG_VALID_ID
) != 0) &&
206 ((patch
->nfile
.flags
& GIT_DIFF_FLAG__NO_DATA
) != 0 ||
207 (patch
->nfile
.file
->flags
& GIT_DIFF_FLAG_VALID_ID
) != 0));
209 /* always try to load workdir content first because filtering may
210 * need 2x data size and this minimizes peak memory footprint
212 if (patch
->ofile
.src
== GIT_ITERATOR_TYPE_WORKDIR
) {
213 if ((error
= git_diff_file_content__load(
214 &patch
->ofile
, &patch
->base
.diff_opts
)) < 0 ||
215 should_skip_binary(patch
, patch
->ofile
.file
))
218 if (patch
->nfile
.src
== GIT_ITERATOR_TYPE_WORKDIR
) {
219 if ((error
= git_diff_file_content__load(
220 &patch
->nfile
, &patch
->base
.diff_opts
)) < 0 ||
221 should_skip_binary(patch
, patch
->nfile
.file
))
225 /* once workdir has been tried, load other data as needed */
226 if (patch
->ofile
.src
!= GIT_ITERATOR_TYPE_WORKDIR
) {
227 if ((error
= git_diff_file_content__load(
228 &patch
->ofile
, &patch
->base
.diff_opts
)) < 0 ||
229 should_skip_binary(patch
, patch
->ofile
.file
))
232 if (patch
->nfile
.src
!= GIT_ITERATOR_TYPE_WORKDIR
) {
233 if ((error
= git_diff_file_content__load(
234 &patch
->nfile
, &patch
->base
.diff_opts
)) < 0 ||
235 should_skip_binary(patch
, patch
->nfile
.file
))
239 /* if previously missing an oid, and now that we have it the two sides
240 * are the same (and not submodules), update MODIFIED -> UNMODIFIED
242 if (incomplete_data
&&
243 patch
->ofile
.file
->mode
== patch
->nfile
.file
->mode
&&
244 patch
->ofile
.file
->mode
!= GIT_FILEMODE_COMMIT
&&
245 git_oid_equal(&patch
->ofile
.file
->id
, &patch
->nfile
.file
->id
) &&
246 patch
->base
.delta
->status
== GIT_DELTA_MODIFIED
) /* not RENAMED/COPIED! */
247 patch
->base
.delta
->status
= GIT_DELTA_UNMODIFIED
;
250 patch_generated_update_binary(patch
);
253 if (patch_generated_diffable(patch
))
254 patch
->flags
|= GIT_PATCH_GENERATED_DIFFABLE
;
256 patch
->flags
|= GIT_PATCH_GENERATED_LOADED
;
262 static int patch_generated_invoke_file_callback(
263 git_patch_generated
*patch
, git_patch_generated_output
*output
)
265 float progress
= patch
->diff
?
266 ((float)patch
->delta_index
/ patch
->diff
->deltas
.length
) : 1.0f
;
268 if (!output
->file_cb
)
271 return giterr_set_after_callback_function(
272 output
->file_cb(patch
->base
.delta
, progress
, output
->payload
),
276 static int create_binary(
277 git_diff_binary_t
*out_type
,
280 size_t *out_inflatedlen
,
286 git_buf deflate
= GIT_BUF_INIT
, delta
= GIT_BUF_INIT
;
287 size_t delta_data_len
;
290 /* The git_delta function accepts unsigned long only */
291 if (!git__is_ulong(a_datalen
) || !git__is_ulong(b_datalen
))
294 if ((error
= git_zstream_deflatebuf(&deflate
, b_data
, b_datalen
)) < 0)
297 /* The git_delta function accepts unsigned long only */
298 if (!git__is_ulong(deflate
.size
)) {
303 if (a_datalen
&& b_datalen
) {
306 error
= git_delta(&delta_data
, &delta_data_len
,
312 error
= git_zstream_deflatebuf(
313 &delta
, delta_data
, delta_data_len
);
315 git__free(delta_data
);
316 } else if (error
== GIT_EBUFS
) {
324 if (delta
.size
&& delta
.size
< deflate
.size
) {
325 *out_type
= GIT_DIFF_BINARY_DELTA
;
326 *out_datalen
= delta
.size
;
327 *out_data
= git_buf_detach(&delta
);
328 *out_inflatedlen
= delta_data_len
;
330 *out_type
= GIT_DIFF_BINARY_LITERAL
;
331 *out_datalen
= deflate
.size
;
332 *out_data
= git_buf_detach(&deflate
);
333 *out_inflatedlen
= b_datalen
;
337 git_buf_free(&deflate
);
338 git_buf_free(&delta
);
343 static int diff_binary(git_patch_generated_output
*output
, git_patch_generated
*patch
)
345 git_diff_binary binary
= {{0}};
346 const char *old_data
= patch
->ofile
.map
.data
;
347 const char *new_data
= patch
->nfile
.map
.data
;
348 size_t old_len
= patch
->ofile
.map
.len
,
349 new_len
= patch
->nfile
.map
.len
;
352 /* Only load contents if the user actually wants to diff
354 if (patch
->base
.diff_opts
.flags
& GIT_DIFF_SHOW_BINARY
) {
355 /* Create the old->new delta (as the "new" side of the patch),
356 * and the new->old delta (as the "old" side)
358 if ((error
= create_binary(&binary
.old_file
.type
,
359 (char **)&binary
.old_file
.data
,
360 &binary
.old_file
.datalen
,
361 &binary
.old_file
.inflatedlen
,
362 new_data
, new_len
, old_data
, old_len
)) < 0 ||
363 (error
= create_binary(&binary
.new_file
.type
,
364 (char **)&binary
.new_file
.data
,
365 &binary
.new_file
.datalen
,
366 &binary
.new_file
.inflatedlen
,
367 old_data
, old_len
, new_data
, new_len
)) < 0)
371 error
= giterr_set_after_callback_function(
372 output
->binary_cb(patch
->base
.delta
, &binary
, output
->payload
),
375 git__free((char *) binary
.old_file
.data
);
376 git__free((char *) binary
.new_file
.data
);
381 static int patch_generated_create(
382 git_patch_generated
*patch
,
383 git_patch_generated_output
*output
)
387 if ((patch
->flags
& GIT_PATCH_GENERATED_DIFFED
) != 0)
390 /* if we are not looking at the binary or text data, don't do the diff */
391 if (!output
->binary_cb
&& !output
->hunk_cb
&& !output
->data_cb
)
394 if ((patch
->flags
& GIT_PATCH_GENERATED_LOADED
) == 0 &&
395 (error
= patch_generated_load(patch
, output
)) < 0)
398 if ((patch
->flags
& GIT_PATCH_GENERATED_DIFFABLE
) == 0)
401 if ((patch
->base
.delta
->flags
& GIT_DIFF_FLAG_BINARY
) != 0) {
402 if (output
->binary_cb
)
403 error
= diff_binary(output
, patch
);
407 error
= output
->diff_cb(output
, patch
);
410 patch
->flags
|= GIT_PATCH_GENERATED_DIFFED
;
414 static int diff_required(git_diff
*diff
, const char *action
)
418 giterr_set(GITERR_INVALID
, "Must provide valid diff to %s", action
);
422 int git_diff_foreach(
424 git_diff_file_cb file_cb
,
425 git_diff_binary_cb binary_cb
,
426 git_diff_hunk_cb hunk_cb
,
427 git_diff_line_cb data_cb
,
433 git_patch_generated patch
;
435 if ((error
= diff_required(diff
, "git_diff_foreach")) < 0)
438 memset(&xo
, 0, sizeof(xo
));
439 memset(&patch
, 0, sizeof(patch
));
441 &xo
.output
, &diff
->opts
, file_cb
, binary_cb
, hunk_cb
, data_cb
, payload
);
442 git_xdiff_init(&xo
, &diff
->opts
);
444 git_vector_foreach(&diff
->deltas
, idx
, patch
.base
.delta
) {
446 /* check flags against patch status */
447 if (git_diff_delta__should_skip(&diff
->opts
, patch
.base
.delta
))
450 if (binary_cb
|| hunk_cb
|| data_cb
) {
451 if ((error
= patch_generated_init(&patch
, diff
, idx
)) != 0 ||
452 (error
= patch_generated_load(&patch
, &xo
.output
)) != 0)
456 if ((error
= patch_generated_invoke_file_callback(&patch
, &xo
.output
)) == 0) {
457 if (binary_cb
|| hunk_cb
|| data_cb
)
458 error
= patch_generated_create(&patch
, &xo
.output
);
461 git_patch_free(&patch
.base
);
471 git_patch_generated patch
;
472 git_diff_delta delta
;
473 char paths
[GIT_FLEX_ARRAY
];
474 } patch_generated_with_delta
;
476 static int diff_single_generate(patch_generated_with_delta
*pd
, git_xdiff_output
*xo
)
479 git_patch_generated
*patch
= &pd
->patch
;
480 bool has_old
= ((patch
->ofile
.flags
& GIT_DIFF_FLAG__NO_DATA
) == 0);
481 bool has_new
= ((patch
->nfile
.flags
& GIT_DIFF_FLAG__NO_DATA
) == 0);
483 pd
->delta
.status
= has_new
?
484 (has_old
? GIT_DELTA_MODIFIED
: GIT_DELTA_ADDED
) :
485 (has_old
? GIT_DELTA_DELETED
: GIT_DELTA_UNTRACKED
);
487 if (git_oid_equal(&patch
->nfile
.file
->id
, &patch
->ofile
.file
->id
))
488 pd
->delta
.status
= GIT_DELTA_UNMODIFIED
;
490 patch
->base
.delta
= &pd
->delta
;
492 patch_generated_init_common(patch
);
494 if (pd
->delta
.status
== GIT_DELTA_UNMODIFIED
&&
495 !(patch
->ofile
.opts_flags
& GIT_DIFF_INCLUDE_UNMODIFIED
))
498 error
= patch_generated_invoke_file_callback(patch
, (git_patch_generated_output
*)xo
);
501 error
= patch_generated_create(patch
, (git_patch_generated_output
*)xo
);
506 static int patch_generated_from_sources(
507 patch_generated_with_delta
*pd
,
508 git_xdiff_output
*xo
,
509 git_diff_file_content_src
*oldsrc
,
510 git_diff_file_content_src
*newsrc
,
511 const git_diff_options
*opts
)
514 git_repository
*repo
=
515 oldsrc
->blob
? git_blob_owner(oldsrc
->blob
) :
516 newsrc
->blob
? git_blob_owner(newsrc
->blob
) : NULL
;
517 git_diff_file
*lfile
= &pd
->delta
.old_file
, *rfile
= &pd
->delta
.new_file
;
518 git_diff_file_content
*ldata
= &pd
->patch
.ofile
, *rdata
= &pd
->patch
.nfile
;
520 if ((error
= patch_generated_normalize_options(&pd
->patch
.base
.diff_opts
, opts
)) < 0)
523 if (opts
&& (opts
->flags
& GIT_DIFF_REVERSE
) != 0) {
524 void *tmp
= lfile
; lfile
= rfile
; rfile
= tmp
;
525 tmp
= ldata
; ldata
= rdata
; rdata
= tmp
;
528 pd
->patch
.base
.delta
= &pd
->delta
;
530 if (!oldsrc
->as_path
) {
532 oldsrc
->as_path
= newsrc
->as_path
;
534 oldsrc
->as_path
= newsrc
->as_path
= "file";
536 else if (!newsrc
->as_path
)
537 newsrc
->as_path
= oldsrc
->as_path
;
539 lfile
->path
= oldsrc
->as_path
;
540 rfile
->path
= newsrc
->as_path
;
542 if ((error
= git_diff_file_content__init_from_src(
543 ldata
, repo
, opts
, oldsrc
, lfile
)) < 0 ||
544 (error
= git_diff_file_content__init_from_src(
545 rdata
, repo
, opts
, newsrc
, rfile
)) < 0)
548 return diff_single_generate(pd
, xo
);
551 static int patch_generated_with_delta_alloc(
552 patch_generated_with_delta
**out
,
553 const char **old_path
,
554 const char **new_path
)
556 patch_generated_with_delta
*pd
;
557 size_t old_len
= *old_path
? strlen(*old_path
) : 0;
558 size_t new_len
= *new_path
? strlen(*new_path
) : 0;
561 GITERR_CHECK_ALLOC_ADD(&alloc_len
, sizeof(*pd
), old_len
);
562 GITERR_CHECK_ALLOC_ADD(&alloc_len
, alloc_len
, new_len
);
563 GITERR_CHECK_ALLOC_ADD(&alloc_len
, alloc_len
, 2);
565 *out
= pd
= git__calloc(1, alloc_len
);
566 GITERR_CHECK_ALLOC(pd
);
568 pd
->patch
.flags
= GIT_PATCH_GENERATED_ALLOCATED
;
571 memcpy(&pd
->paths
[0], *old_path
, old_len
);
572 *old_path
= &pd
->paths
[0];
573 } else if (*new_path
)
574 *old_path
= &pd
->paths
[old_len
+ 1];
577 memcpy(&pd
->paths
[old_len
+ 1], *new_path
, new_len
);
578 *new_path
= &pd
->paths
[old_len
+ 1];
579 } else if (*old_path
)
580 *new_path
= &pd
->paths
[0];
585 static int diff_from_sources(
586 git_diff_file_content_src
*oldsrc
,
587 git_diff_file_content_src
*newsrc
,
588 const git_diff_options
*opts
,
589 git_diff_file_cb file_cb
,
590 git_diff_binary_cb binary_cb
,
591 git_diff_hunk_cb hunk_cb
,
592 git_diff_line_cb data_cb
,
596 patch_generated_with_delta pd
;
599 memset(&xo
, 0, sizeof(xo
));
601 &xo
.output
, opts
, file_cb
, binary_cb
, hunk_cb
, data_cb
, payload
);
602 git_xdiff_init(&xo
, opts
);
604 memset(&pd
, 0, sizeof(pd
));
606 error
= patch_generated_from_sources(&pd
, &xo
, oldsrc
, newsrc
, opts
);
608 git_patch_free(&pd
.patch
.base
);
613 static int patch_from_sources(
615 git_diff_file_content_src
*oldsrc
,
616 git_diff_file_content_src
*newsrc
,
617 const git_diff_options
*opts
)
620 patch_generated_with_delta
*pd
;
626 if ((error
= patch_generated_with_delta_alloc(
627 &pd
, &oldsrc
->as_path
, &newsrc
->as_path
)) < 0)
630 memset(&xo
, 0, sizeof(xo
));
631 diff_output_to_patch(&xo
.output
, &pd
->patch
);
632 git_xdiff_init(&xo
, opts
);
634 if (!(error
= patch_generated_from_sources(pd
, &xo
, oldsrc
, newsrc
, opts
)))
635 *out
= (git_patch
*)pd
;
637 git_patch_free((git_patch
*)pd
);
643 const git_blob
*old_blob
,
644 const char *old_path
,
645 const git_blob
*new_blob
,
646 const char *new_path
,
647 const git_diff_options
*opts
,
648 git_diff_file_cb file_cb
,
649 git_diff_binary_cb binary_cb
,
650 git_diff_hunk_cb hunk_cb
,
651 git_diff_line_cb data_cb
,
654 git_diff_file_content_src osrc
=
655 GIT_DIFF_FILE_CONTENT_SRC__BLOB(old_blob
, old_path
);
656 git_diff_file_content_src nsrc
=
657 GIT_DIFF_FILE_CONTENT_SRC__BLOB(new_blob
, new_path
);
658 return diff_from_sources(
659 &osrc
, &nsrc
, opts
, file_cb
, binary_cb
, hunk_cb
, data_cb
, payload
);
662 int git_patch_from_blobs(
664 const git_blob
*old_blob
,
665 const char *old_path
,
666 const git_blob
*new_blob
,
667 const char *new_path
,
668 const git_diff_options
*opts
)
670 git_diff_file_content_src osrc
=
671 GIT_DIFF_FILE_CONTENT_SRC__BLOB(old_blob
, old_path
);
672 git_diff_file_content_src nsrc
=
673 GIT_DIFF_FILE_CONTENT_SRC__BLOB(new_blob
, new_path
);
674 return patch_from_sources(out
, &osrc
, &nsrc
, opts
);
677 int git_diff_blob_to_buffer(
678 const git_blob
*old_blob
,
679 const char *old_path
,
682 const char *buf_path
,
683 const git_diff_options
*opts
,
684 git_diff_file_cb file_cb
,
685 git_diff_binary_cb binary_cb
,
686 git_diff_hunk_cb hunk_cb
,
687 git_diff_line_cb data_cb
,
690 git_diff_file_content_src osrc
=
691 GIT_DIFF_FILE_CONTENT_SRC__BLOB(old_blob
, old_path
);
692 git_diff_file_content_src nsrc
=
693 GIT_DIFF_FILE_CONTENT_SRC__BUF(buf
, buflen
, buf_path
);
694 return diff_from_sources(
695 &osrc
, &nsrc
, opts
, file_cb
, binary_cb
, hunk_cb
, data_cb
, payload
);
698 int git_patch_from_blob_and_buffer(
700 const git_blob
*old_blob
,
701 const char *old_path
,
704 const char *buf_path
,
705 const git_diff_options
*opts
)
707 git_diff_file_content_src osrc
=
708 GIT_DIFF_FILE_CONTENT_SRC__BLOB(old_blob
, old_path
);
709 git_diff_file_content_src nsrc
=
710 GIT_DIFF_FILE_CONTENT_SRC__BUF(buf
, buflen
, buf_path
);
711 return patch_from_sources(out
, &osrc
, &nsrc
, opts
);
714 int git_diff_buffers(
717 const char *old_path
,
720 const char *new_path
,
721 const git_diff_options
*opts
,
722 git_diff_file_cb file_cb
,
723 git_diff_binary_cb binary_cb
,
724 git_diff_hunk_cb hunk_cb
,
725 git_diff_line_cb data_cb
,
728 git_diff_file_content_src osrc
=
729 GIT_DIFF_FILE_CONTENT_SRC__BUF(old_buf
, old_len
, old_path
);
730 git_diff_file_content_src nsrc
=
731 GIT_DIFF_FILE_CONTENT_SRC__BUF(new_buf
, new_len
, new_path
);
732 return diff_from_sources(
733 &osrc
, &nsrc
, opts
, file_cb
, binary_cb
, hunk_cb
, data_cb
, payload
);
736 int git_patch_from_buffers(
740 const char *old_path
,
743 const char *new_path
,
744 const git_diff_options
*opts
)
746 git_diff_file_content_src osrc
=
747 GIT_DIFF_FILE_CONTENT_SRC__BUF(old_buf
, old_len
, old_path
);
748 git_diff_file_content_src nsrc
=
749 GIT_DIFF_FILE_CONTENT_SRC__BUF(new_buf
, new_len
, new_path
);
750 return patch_from_sources(out
, &osrc
, &nsrc
, opts
);
753 int git_patch_generated_from_diff(
754 git_patch
**patch_ptr
, git_diff
*diff
, size_t idx
)
758 git_diff_delta
*delta
= NULL
;
759 git_patch_generated
*patch
= NULL
;
761 if (patch_ptr
) *patch_ptr
= NULL
;
763 if (diff_required(diff
, "git_patch_from_diff") < 0)
766 delta
= git_vector_get(&diff
->deltas
, idx
);
768 giterr_set(GITERR_INVALID
, "Index out of range for delta in diff");
769 return GIT_ENOTFOUND
;
772 if (git_diff_delta__should_skip(&diff
->opts
, delta
))
775 /* don't load the patch data unless we need it for binary check */
777 ((delta
->flags
& DIFF_FLAGS_KNOWN_BINARY
) != 0 ||
778 (diff
->opts
.flags
& GIT_DIFF_SKIP_BINARY_CHECK
) != 0))
781 if ((error
= patch_generated_alloc_from_diff(&patch
, diff
, idx
)) < 0)
784 memset(&xo
, 0, sizeof(xo
));
785 diff_output_to_patch(&xo
.output
, patch
);
786 git_xdiff_init(&xo
, &diff
->opts
);
788 error
= patch_generated_invoke_file_callback(patch
, &xo
.output
);
791 error
= patch_generated_create(patch
, &xo
.output
);
794 /* TODO: if cumulative diff size is < 0.5 total size, flatten patch */
795 /* TODO: and unload the file content */
798 if (error
|| !patch_ptr
)
799 git_patch_free(&patch
->base
);
801 *patch_ptr
= &patch
->base
;
806 git_diff_driver
*git_patch_generated_driver(git_patch_generated
*patch
)
808 /* ofile driver is representative for whole patch */
809 return patch
->ofile
.driver
;
812 void git_patch_generated_old_data(
813 char **ptr
, size_t *len
, git_patch_generated
*patch
)
815 *ptr
= patch
->ofile
.map
.data
;
816 *len
= patch
->ofile
.map
.len
;
819 void git_patch_generated_new_data(
820 char **ptr
, size_t *len
, git_patch_generated
*patch
)
822 *ptr
= patch
->nfile
.map
.data
;
823 *len
= patch
->nfile
.map
.len
;
826 static int patch_generated_file_cb(
827 const git_diff_delta
*delta
,
831 GIT_UNUSED(delta
); GIT_UNUSED(progress
); GIT_UNUSED(payload
);
835 static int patch_generated_binary_cb(
836 const git_diff_delta
*delta
,
837 const git_diff_binary
*binary
,
840 git_patch
*patch
= payload
;
844 memcpy(&patch
->binary
, binary
, sizeof(git_diff_binary
));
846 if (binary
->old_file
.data
) {
847 patch
->binary
.old_file
.data
= git__malloc(binary
->old_file
.datalen
);
848 GITERR_CHECK_ALLOC(patch
->binary
.old_file
.data
);
850 memcpy((char *)patch
->binary
.old_file
.data
,
851 binary
->old_file
.data
, binary
->old_file
.datalen
);
854 if (binary
->new_file
.data
) {
855 patch
->binary
.new_file
.data
= git__malloc(binary
->new_file
.datalen
);
856 GITERR_CHECK_ALLOC(patch
->binary
.new_file
.data
);
858 memcpy((char *)patch
->binary
.new_file
.data
,
859 binary
->new_file
.data
, binary
->new_file
.datalen
);
865 static int git_patch_hunk_cb(
866 const git_diff_delta
*delta
,
867 const git_diff_hunk
*hunk_
,
870 git_patch_generated
*patch
= payload
;
871 git_patch_hunk
*hunk
;
875 hunk
= git_array_alloc(patch
->base
.hunks
);
876 GITERR_CHECK_ALLOC(hunk
);
878 memcpy(&hunk
->hunk
, hunk_
, sizeof(hunk
->hunk
));
880 patch
->base
.header_size
+= hunk_
->header_len
;
882 hunk
->line_start
= git_array_size(patch
->base
.lines
);
883 hunk
->line_count
= 0;
888 static int patch_generated_line_cb(
889 const git_diff_delta
*delta
,
890 const git_diff_hunk
*hunk_
,
891 const git_diff_line
*line_
,
894 git_patch_generated
*patch
= payload
;
895 git_patch_hunk
*hunk
;
901 hunk
= git_array_last(patch
->base
.hunks
);
902 assert(hunk
); /* programmer error if no hunk is available */
904 line
= git_array_alloc(patch
->base
.lines
);
905 GITERR_CHECK_ALLOC(line
);
907 memcpy(line
, line_
, sizeof(*line
));
909 /* do some bookkeeping so we can provide old/new line numbers */
911 patch
->base
.content_size
+= line
->content_len
;
913 if (line
->origin
== GIT_DIFF_LINE_ADDITION
||
914 line
->origin
== GIT_DIFF_LINE_DELETION
)
915 patch
->base
.content_size
+= 1;
916 else if (line
->origin
== GIT_DIFF_LINE_CONTEXT
) {
917 patch
->base
.content_size
+= 1;
918 patch
->base
.context_size
+= line
->content_len
+ 1;
919 } else if (line
->origin
== GIT_DIFF_LINE_CONTEXT_EOFNL
)
920 patch
->base
.context_size
+= line
->content_len
;
927 static void diff_output_init(
928 git_patch_generated_output
*out
,
929 const git_diff_options
*opts
,
930 git_diff_file_cb file_cb
,
931 git_diff_binary_cb binary_cb
,
932 git_diff_hunk_cb hunk_cb
,
933 git_diff_line_cb data_cb
,
938 memset(out
, 0, sizeof(*out
));
940 out
->file_cb
= file_cb
;
941 out
->binary_cb
= binary_cb
;
942 out
->hunk_cb
= hunk_cb
;
943 out
->data_cb
= data_cb
;
944 out
->payload
= payload
;
947 static void diff_output_to_patch(
948 git_patch_generated_output
*out
, git_patch_generated
*patch
)
953 patch_generated_file_cb
,
954 patch_generated_binary_cb
,
956 patch_generated_line_cb
,