diff options
Diffstat (limited to 'blame.c')
| -rw-r--r-- | blame.c | 1231 |
1 files changed, 1132 insertions, 99 deletions
@@ -9,6 +9,8 @@ #include "blame.h" #include "alloc.h" #include "commit-slab.h" +#include "bloom.h" +#include "commit-graph.h" define_commit_slab(blame_suspects, struct blame_origin *); static struct blame_suspects blame_suspects; @@ -99,9 +101,9 @@ static void verify_working_tree_path(struct repository *r, for (parents = work_tree->parents; parents; parents = parents->next) { const struct object_id *commit_oid = &parents->item->object.oid; struct object_id blob_oid; - unsigned mode; + unsigned short mode; - if (!get_tree_entry(commit_oid, path, &blob_oid, &mode) && + if (!get_tree_entry(r, commit_oid, path, &blob_oid, &mode) && oid_object_info(r, &blob_oid, NULL) == OBJ_BLOB) return; } @@ -116,35 +118,38 @@ static void verify_working_tree_path(struct repository *r, die("no such path '%s' in HEAD", path); } -static struct commit_list **append_parent(struct commit_list **tail, const struct object_id *oid) +static struct commit_list **append_parent(struct repository *r, + struct commit_list **tail, + const struct object_id *oid) { struct commit *parent; - parent = lookup_commit_reference(the_repository, oid); + parent = lookup_commit_reference(r, oid); if (!parent) die("no such commit %s", oid_to_hex(oid)); return &commit_list_insert(parent, tail)->next; } -static void append_merge_parents(struct commit_list **tail) +static void append_merge_parents(struct repository *r, + struct commit_list **tail) { int merge_head; struct strbuf line = STRBUF_INIT; - merge_head = open(git_path_merge_head(the_repository), O_RDONLY); + merge_head = open(git_path_merge_head(r), O_RDONLY); if (merge_head < 0) { if (errno == ENOENT) return; die("cannot open '%s' for reading", - git_path_merge_head(the_repository)); + git_path_merge_head(r)); } while (!strbuf_getwholeline_fd(&line, merge_head, '\n')) { struct object_id oid; - if (line.len < GIT_SHA1_HEXSZ || get_oid_hex(line.buf, &oid)) + if (get_oid_hex(line.buf, &oid)) die("unknown line in '%s': %s", - git_path_merge_head(the_repository), line.buf); - tail = append_parent(tail, &oid); + git_path_merge_head(r), line.buf); + tail = append_parent(r, tail, &oid); } close(merge_head); strbuf_release(&line); @@ -155,11 +160,13 @@ static void append_merge_parents(struct commit_list **tail) * want to transfer ownership of the buffer to the commit (so we * must use detach). */ -static void set_commit_buffer_from_strbuf(struct commit *c, struct strbuf *sb) +static void set_commit_buffer_from_strbuf(struct repository *r, + struct commit *c, + struct strbuf *sb) { size_t len; void *buf = strbuf_detach(sb, &len); - set_commit_buffer(the_repository, c, buf, len); + set_commit_buffer(r, c, buf, len); } /* @@ -183,9 +190,9 @@ static struct commit *fake_working_tree_commit(struct repository *r, unsigned mode; struct strbuf msg = STRBUF_INIT; - read_index(r->index); + repo_read_index(r); time(&now); - commit = alloc_commit_node(the_repository); + commit = alloc_commit_node(r); commit->object.parsed = 1; commit->date = now; parent_tail = &commit->parents; @@ -193,13 +200,14 @@ static struct commit *fake_working_tree_commit(struct repository *r, if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL)) die("no such ref: HEAD"); - parent_tail = append_parent(parent_tail, &head_oid); - append_merge_parents(parent_tail); + parent_tail = append_parent(r, parent_tail, &head_oid); + append_merge_parents(r, parent_tail); verify_working_tree_path(r, commit, path); origin = make_origin(commit, path); - ident = fmt_ident("Not Committed Yet", "not.committed.yet", NULL, 0); + ident = fmt_ident("Not Committed Yet", "not.committed.yet", + WANT_BLANK_IDENT, NULL, 0); strbuf_addstr(&msg, "tree 0000000000000000000000000000000000000000\n"); for (parent = commit->parents; parent; parent = parent->next) strbuf_addf(&msg, "parent %s\n", @@ -211,7 +219,7 @@ static struct commit *fake_working_tree_commit(struct repository *r, ident, ident, path, (!contents_from ? path : (!strcmp(contents_from, "-") ? "standard input" : contents_from))); - set_commit_buffer_from_strbuf(commit, &msg); + set_commit_buffer_from_strbuf(r, commit, &msg); if (!contents_from || strcmp("-", contents_from)) { struct stat st; @@ -265,7 +273,7 @@ static struct commit *fake_working_tree_commit(struct repository *r, * want to run "diff-index --cached". */ discard_index(r->index); - read_index(r->index); + repo_read_index(r); len = strlen(path); if (!mode) { @@ -305,12 +313,710 @@ static int diff_hunks(mmfile_t *file_a, mmfile_t *file_b, return xdi_diff(file_a, file_b, &xpp, &xecfg, &ecb); } +static const char *get_next_line(const char *start, const char *end) +{ + const char *nl = memchr(start, '\n', end - start); + + return nl ? nl + 1 : end; +} + +static int find_line_starts(int **line_starts, const char *buf, + unsigned long len) +{ + const char *end = buf + len; + const char *p; + int *lineno; + int num = 0; + + for (p = buf; p < end; p = get_next_line(p, end)) + num++; + + ALLOC_ARRAY(*line_starts, num + 1); + lineno = *line_starts; + + for (p = buf; p < end; p = get_next_line(p, end)) + *lineno++ = p - buf; + + *lineno = len; + + return num; +} + +struct fingerprint_entry; + +/* A fingerprint is intended to loosely represent a string, such that two + * fingerprints can be quickly compared to give an indication of the similarity + * of the strings that they represent. + * + * A fingerprint is represented as a multiset of the lower-cased byte pairs in + * the string that it represents. Whitespace is added at each end of the + * string. Whitespace pairs are ignored. Whitespace is converted to '\0'. + * For example, the string "Darth Radar" will be converted to the following + * fingerprint: + * {"\0d", "da", "da", "ar", "ar", "rt", "th", "h\0", "\0r", "ra", "ad", "r\0"} + * + * The similarity between two fingerprints is the size of the intersection of + * their multisets, including repeated elements. See fingerprint_similarity for + * examples. + * + * For ease of implementation, the fingerprint is implemented as a map + * of byte pairs to the count of that byte pair in the string, instead of + * allowing repeated elements in a set. + */ +struct fingerprint { + struct hashmap map; + /* As we know the maximum number of entries in advance, it's + * convenient to store the entries in a single array instead of having + * the hashmap manage the memory. + */ + struct fingerprint_entry *entries; +}; + +/* A byte pair in a fingerprint. Stores the number of times the byte pair + * occurs in the string that the fingerprint represents. + */ +struct fingerprint_entry { + /* The hashmap entry - the hash represents the byte pair in its + * entirety so we don't need to store the byte pair separately. + */ + struct hashmap_entry entry; + /* The number of times the byte pair occurs in the string that the + * fingerprint represents. + */ + int count; +}; + +/* See `struct fingerprint` for an explanation of what a fingerprint is. + * \param result the fingerprint of the string is stored here. This must be + * freed later using free_fingerprint. + * \param line_begin the start of the string + * \param line_end the end of the string + */ +static void get_fingerprint(struct fingerprint *result, + const char *line_begin, + const char *line_end) +{ + unsigned int hash, c0 = 0, c1; + const char *p; + int max_map_entry_count = 1 + line_end - line_begin; + struct fingerprint_entry *entry = xcalloc(max_map_entry_count, + sizeof(struct fingerprint_entry)); + struct fingerprint_entry *found_entry; + + hashmap_init(&result->map, NULL, NULL, max_map_entry_count); + result->entries = entry; + for (p = line_begin; p <= line_end; ++p, c0 = c1) { + /* Always terminate the string with whitespace. + * Normalise whitespace to 0, and normalise letters to + * lower case. This won't work for multibyte characters but at + * worst will match some unrelated characters. + */ + if ((p == line_end) || isspace(*p)) + c1 = 0; + else + c1 = tolower(*p); + hash = c0 | (c1 << 8); + /* Ignore whitespace pairs */ + if (hash == 0) + continue; + hashmap_entry_init(&entry->entry, hash); + + found_entry = hashmap_get_entry(&result->map, entry, + /* member name */ entry, NULL); + if (found_entry) { + found_entry->count += 1; + } else { + entry->count = 1; + hashmap_add(&result->map, &entry->entry); + ++entry; + } + } +} + +static void free_fingerprint(struct fingerprint *f) +{ + hashmap_clear(&f->map); + free(f->entries); +} + +/* Calculates the similarity between two fingerprints as the size of the + * intersection of their multisets, including repeated elements. See + * `struct fingerprint` for an explanation of the fingerprint representation. + * The similarity between "cat mat" and "father rather" is 2 because "at" is + * present twice in both strings while the similarity between "tim" and "mit" + * is 0. + */ +static int fingerprint_similarity(struct fingerprint *a, struct fingerprint *b) +{ + int intersection = 0; + struct hashmap_iter iter; + const struct fingerprint_entry *entry_a, *entry_b; + + hashmap_for_each_entry(&b->map, &iter, entry_b, + entry /* member name */) { + entry_a = hashmap_get_entry(&a->map, entry_b, entry, NULL); + if (entry_a) { + intersection += entry_a->count < entry_b->count ? + entry_a->count : entry_b->count; + } + } + return intersection; +} + +/* Subtracts byte-pair elements in B from A, modifying A in place. + */ +static void fingerprint_subtract(struct fingerprint *a, struct fingerprint *b) +{ + struct hashmap_iter iter; + struct fingerprint_entry *entry_a; + const struct fingerprint_entry *entry_b; + + hashmap_iter_init(&b->map, &iter); + + hashmap_for_each_entry(&b->map, &iter, entry_b, + entry /* member name */) { + entry_a = hashmap_get_entry(&a->map, entry_b, entry, NULL); + if (entry_a) { + if (entry_a->count <= entry_b->count) + hashmap_remove(&a->map, &entry_b->entry, NULL); + else + entry_a->count -= entry_b->count; + } + } +} + +/* Calculate fingerprints for a series of lines. + * Puts the fingerprints in the fingerprints array, which must have been + * preallocated to allow storing line_count elements. + */ +static void get_line_fingerprints(struct fingerprint *fingerprints, + const char *content, const int *line_starts, + long first_line, long line_count) +{ + int i; + const char *linestart, *lineend; + + line_starts += first_line; + for (i = 0; i < line_count; ++i) { + linestart = content + line_starts[i]; + lineend = content + line_starts[i + 1]; + get_fingerprint(fingerprints + i, linestart, lineend); + } +} + +static void free_line_fingerprints(struct fingerprint *fingerprints, + int nr_fingerprints) +{ + int i; + + for (i = 0; i < nr_fingerprints; i++) + free_fingerprint(&fingerprints[i]); +} + +/* This contains the data necessary to linearly map a line number in one half + * of a diff chunk to the line in the other half of the diff chunk that is + * closest in terms of its position as a fraction of the length of the chunk. + */ +struct line_number_mapping { + int destination_start, destination_length, + source_start, source_length; +}; + +/* Given a line number in one range, offset and scale it to map it onto the + * other range. + * Essentially this mapping is a simple linear equation but the calculation is + * more complicated to allow performing it with integer operations. + * Another complication is that if a line could map onto many lines in the + * destination range then we want to choose the line at the center of those + * possibilities. + * Example: if the chunk is 2 lines long in A and 10 lines long in B then the + * first 5 lines in B will map onto the first line in the A chunk, while the + * last 5 lines will all map onto the second line in the A chunk. + * Example: if the chunk is 10 lines long in A and 2 lines long in B then line + * 0 in B will map onto line 2 in A, and line 1 in B will map onto line 7 in A. + */ +static int map_line_number(int line_number, + const struct line_number_mapping *mapping) +{ + return ((line_number - mapping->source_start) * 2 + 1) * + mapping->destination_length / + (mapping->source_length * 2) + + mapping->destination_start; +} + +/* Get a pointer to the element storing the similarity between a line in A + * and a line in B. + * + * The similarities are stored in a 2-dimensional array. Each "row" in the + * array contains the similarities for a line in B. The similarities stored in + * a row are the similarities between the line in B and the nearby lines in A. + * To keep the length of each row the same, it is padded out with values of -1 + * where the search range extends beyond the lines in A. + * For example, if max_search_distance_a is 2 and the two sides of a diff chunk + * look like this: + * a | m + * b | n + * c | o + * d | p + * e | q + * Then the similarity array will contain: + * [-1, -1, am, bm, cm, + * -1, an, bn, cn, dn, + * ao, bo, co, do, eo, + * bp, cp, dp, ep, -1, + * cq, dq, eq, -1, -1] + * Where similarities are denoted either by -1 for invalid, or the + * concatenation of the two lines in the diff being compared. + * + * \param similarities array of similarities between lines in A and B + * \param line_a the index of the line in A, in the same frame of reference as + * closest_line_a. + * \param local_line_b the index of the line in B, relative to the first line + * in B that similarities represents. + * \param closest_line_a the index of the line in A that is deemed to be + * closest to local_line_b. This must be in the same + * frame of reference as line_a. This value defines + * where similarities is centered for the line in B. + * \param max_search_distance_a maximum distance in lines from the closest line + * in A for other lines in A for which + * similarities may be calculated. + */ +static int *get_similarity(int *similarities, + int line_a, int local_line_b, + int closest_line_a, int max_search_distance_a) +{ + assert(abs(line_a - closest_line_a) <= + max_search_distance_a); + return similarities + line_a - closest_line_a + + max_search_distance_a + + local_line_b * (max_search_distance_a * 2 + 1); +} + +#define CERTAIN_NOTHING_MATCHES -2 +#define CERTAINTY_NOT_CALCULATED -1 + +/* Given a line in B, first calculate its similarities with nearby lines in A + * if not already calculated, then identify the most similar and second most + * similar lines. The "certainty" is calculated based on those two + * similarities. + * + * \param start_a the index of the first line of the chunk in A + * \param length_a the length in lines of the chunk in A + * \param local_line_b the index of the line in B, relative to the first line + * in the chunk. + * \param fingerprints_a array of fingerprints for the chunk in A + * \param fingerprints_b array of fingerprints for the chunk in B + * \param similarities 2-dimensional array of similarities between lines in A + * and B. See get_similarity() for more details. + * \param certainties array of values indicating how strongly a line in B is + * matched with some line in A. + * \param second_best_result array of absolute indices in A for the second + * closest match of a line in B. + * \param result array of absolute indices in A for the closest match of a line + * in B. + * \param max_search_distance_a maximum distance in lines from the closest line + * in A for other lines in A for which + * similarities may be calculated. + * \param map_line_number_in_b_to_a parameter to map_line_number(). + */ +static void find_best_line_matches( + int start_a, + int length_a, + int start_b, + int local_line_b, + struct fingerprint *fingerprints_a, + struct fingerprint *fingerprints_b, + int *similarities, + int *certainties, + int *second_best_result, + int *result, + const int max_search_distance_a, + const struct line_number_mapping *map_line_number_in_b_to_a) +{ + + int i, search_start, search_end, closest_local_line_a, *similarity, + best_similarity = 0, second_best_similarity = 0, + best_similarity_index = 0, second_best_similarity_index = 0; + + /* certainty has already been calculated so no need to redo the work */ + if (certainties[local_line_b] != CERTAINTY_NOT_CALCULATED) + return; + + closest_local_line_a = map_line_number( + local_line_b + start_b, map_line_number_in_b_to_a) - start_a; + + search_start = closest_local_line_a - max_search_distance_a; + if (search_start < 0) + search_start = 0; + + search_end = closest_local_line_a + max_search_distance_a + 1; + if (search_end > length_a) + search_end = length_a; + + for (i = search_start; i < search_end; ++i) { + similarity = get_similarity(similarities, + i, local_line_b, + closest_local_line_a, + max_search_distance_a); + if (*similarity == -1) { + /* This value will never exceed 10 but assert just in + * case + */ + assert(abs(i - closest_local_line_a) < 1000); + /* scale the similarity by (1000 - distance from + * closest line) to act as a tie break between lines + * that otherwise are equally similar. + */ + *similarity = fingerprint_similarity( + fingerprints_b + local_line_b, + fingerprints_a + i) * + (1000 - abs(i - closest_local_line_a)); + } + if (*similarity > best_similarity) { + second_best_similarity = best_similarity; + second_best_similarity_index = best_similarity_index; + best_similarity = *similarity; + best_similarity_index = i; + } else if (*similarity > second_best_similarity) { + second_best_similarity = *similarity; + second_best_similarity_index = i; + } + } + + if (best_similarity == 0) { + /* this line definitely doesn't match with anything. Mark it + * with this special value so it doesn't get invalidated and + * won't be recalculated. + */ + certainties[local_line_b] = CERTAIN_NOTHING_MATCHES; + result[local_line_b] = -1; + } else { + /* Calculate the certainty with which this line matches. + * If the line matches well with two lines then that reduces + * the certainty. However we still want to prioritise matching + * a line that matches very well with two lines over matching a + * line that matches poorly with one line, hence doubling + * best_similarity. + * This means that if we have + * line X that matches only one line with a score of 3, + * line Y that matches two lines equally with a score of 5, + * and line Z that matches only one line with a score or 2, + * then the lines in order of certainty are X, Y, Z. + */ + certainties[local_line_b] = best_similarity * 2 - + second_best_similarity; + + /* We keep both the best and second best results to allow us to + * check at a later stage of the matching process whether the + * result needs to be invalidated. + */ + result[local_line_b] = start_a + best_similarity_index; + second_best_result[local_line_b] = + start_a + second_best_similarity_index; + } +} + +/* + * This finds the line that we can match with the most confidence, and + * uses it as a partition. It then calls itself on the lines on either side of + * that partition. In this way we avoid lines appearing out of order, and + * retain a sensible line ordering. + * \param start_a index of the first line in A with which lines in B may be + * compared. + * \param start_b index of the first line in B for which matching should be + * done. + * \param length_a number of lines in A with which lines in B may be compared. + * \param length_b number of lines in B for which matching should be done. + * \param fingerprints_a mutable array of fingerprints in A. The first element + * corresponds to the line at start_a. + * \param fingerprints_b array of fingerprints in B. The first element + * corresponds to the line at start_b. + * \param similarities 2-dimensional array of similarities between lines in A + * and B. See get_similarity() for more details. + * \param certainties array of values indicating how strongly a line in B is + * matched with some line in A. + * \param second_best_result array of absolute indices in A for the second + * closest match of a line in B. + * \param result array of absolute indices in A for the closest match of a line + * in B. + * \param max_search_distance_a maximum distance in lines from the closest line + * in A for other lines in A for which + * similarities may be calculated. + * \param max_search_distance_b an upper bound on the greatest possible + * distance between lines in B such that they will + * both be compared with the same line in A + * according to max_search_distance_a. + * \param map_line_number_in_b_to_a parameter to map_line_number(). + */ +static void fuzzy_find_matching_lines_recurse( + int start_a, int start_b, + int length_a, int length_b, + struct fingerprint *fingerprints_a, + struct fingerprint *fingerprints_b, + int *similarities, + int *certainties, + int *second_best_result, + int *result, + int max_search_distance_a, + int max_search_distance_b, + const struct line_number_mapping *map_line_number_in_b_to_a) +{ + int i, invalidate_min, invalidate_max, offset_b, + second_half_start_a, second_half_start_b, + second_half_length_a, second_half_length_b, + most_certain_line_a, most_certain_local_line_b = -1, + most_certain_line_certainty = -1, + closest_local_line_a; + + for (i = 0; i < length_b; ++i) { + find_best_line_matches(start_a, + length_a, + start_b, + i, + fingerprints_a, + fingerprints_b, + similarities, + certainties, + second_best_result, + result, + max_search_distance_a, + map_line_number_in_b_to_a); + + if (certainties[i] > most_certain_line_certainty) { + most_certain_line_certainty = certainties[i]; + most_certain_local_line_b = i; + } + } + + /* No matches. */ + if (most_certain_local_line_b == -1) + return; + + most_certain_line_a = result[most_certain_local_line_b]; + + /* + * Subtract the most certain line's fingerprint in B from the matched + * fingerprint in A. This means that other lines in B can't also match + * the same parts of the line in A. + */ + fingerprint_subtract(fingerprints_a + most_certain_line_a - start_a, + fingerprints_b + most_certain_local_line_b); + + /* Invalidate results that may be affected by the choice of most + * certain line. + */ + invalidate_min = most_certain_local_line_b - max_search_distance_b; + invalidate_max = most_certain_local_line_b + max_search_distance_b + 1; + if (invalidate_min < 0) + invalidate_min = 0; + if (invalidate_max > length_b) + invalidate_max = length_b; + + /* As the fingerprint in A has changed, discard previously calculated + * similarity values with that fingerprint. + */ + for (i = invalidate_min; i < invalidate_max; ++i) { + closest_local_line_a = map_line_number( + i + start_b, map_line_number_in_b_to_a) - start_a; + + /* Check that the lines in A and B are close enough that there + * is a similarity value for them. + */ + if (abs(most_certain_line_a - start_a - closest_local_line_a) > + max_search_distance_a) { + continue; + } + + *get_similarity(similarities, most_certain_line_a - start_a, + i, closest_local_line_a, + max_search_distance_a) = -1; + } + + /* More invalidating of results that may be affected by the choice of + * most certain line. + * Discard the matches for lines in B that are currently matched with a + * line in A such that their ordering contradicts the ordering imposed + * by the choice of most certain line. + */ + for (i = most_certain_local_line_b - 1; i >= invalidate_min; --i) { + /* In this loop we discard results for lines in B that are + * before most-certain-line-B but are matched with a line in A + * that is after most-certain-line-A. + */ + if (certainties[i] >= 0 && + (result[i] >= most_certain_line_a || + second_best_result[i] >= most_certain_line_a)) { + certainties[i] = CERTAINTY_NOT_CALCULATED; + } + } + for (i = most_certain_local_line_b + 1; i < invalidate_max; ++i) { + /* In this loop we discard results for lines in B that are + * after most-certain-line-B but are matched with a line in A + * that is before most-certain-line-A. + */ + if (certainties[i] >= 0 && + (result[i] <= most_certain_line_a || + second_best_result[i] <= most_certain_line_a)) { + certainties[i] = CERTAINTY_NOT_CALCULATED; + } + } + + /* Repeat the matching process for lines before the most certain line. + */ + if (most_certain_local_line_b > 0) { + fuzzy_find_matching_lines_recurse( + start_a, start_b, + most_certain_line_a + 1 - start_a, + most_certain_local_line_b, + fingerprints_a, fingerprints_b, similarities, + certainties, second_best_result, result, + max_search_distance_a, + max_search_distance_b, + map_line_number_in_b_to_a); + } + /* Repeat the matching process for lines after the most certain line. + */ + if (most_certain_local_line_b + 1 < length_b) { + second_half_start_a = most_certain_line_a; + offset_b = most_certain_local_line_b + 1; + second_half_start_b = start_b + offset_b; + second_half_length_a = + length_a + start_a - second_half_start_a; + second_half_length_b = + length_b + start_b - second_half_start_b; + fuzzy_find_matching_lines_recurse( + second_half_start_a, second_half_start_b, + second_half_length_a, second_half_length_b, + fingerprints_a + second_half_start_a - start_a, + fingerprints_b + offset_b, + similarities + + offset_b * (max_search_distance_a * 2 + 1), + certainties + offset_b, + second_best_result + offset_b, result + offset_b, + max_search_distance_a, + max_search_distance_b, + map_line_number_in_b_to_a); + } +} + +/* Find the lines in the parent line range that most closely match the lines in + * the target line range. This is accomplished by matching fingerprints in each + * blame_origin, and choosing the best matches that preserve the line ordering. + * See struct fingerprint for details of fingerprint matching, and + * fuzzy_find_matching_lines_recurse for details of preserving line ordering. + * + * The performance is believed to be O(n log n) in the typical case and O(n^2) + * in a pathological case, where n is the number of lines in the target range. + */ +static int *fuzzy_find_matching_lines(struct blame_origin *parent, + struct blame_origin *target, + int tlno, int parent_slno, int same, + int parent_len) +{ + /* We use the terminology "A" for the left hand side of the diff AKA + * parent, and "B" for the right hand side of the diff AKA target. */ + int start_a = parent_slno; + int length_a = parent_len; + int start_b = tlno; + int length_b = same - tlno; + + struct line_number_mapping map_line_number_in_b_to_a = { + start_a, length_a, start_b, length_b + }; + + struct fingerprint *fingerprints_a = parent->fingerprints; + struct fingerprint *fingerprints_b = target->fingerprints; + + int i, *result, *second_best_result, + *certainties, *similarities, similarity_count; + + /* + * max_search_distance_a means that given a line in B, compare it to + * the line in A that is closest to its position, and the lines in A + * that are no greater than max_search_distance_a lines away from the + * closest line in A. + * + * max_search_distance_b is an upper bound on the greatest possible + * distance between lines in B such that they will both be compared + * with the same line in A according to max_search_distance_a. + */ + int max_search_distance_a = 10, max_search_distance_b; + + if (length_a <= 0) + return NULL; + + if (max_search_distance_a >= length_a) + max_search_distance_a = length_a ? length_a - 1 : 0; + + max_search_distance_b = ((2 * max_search_distance_a + 1) * length_b + - 1) / length_a; + + result = xcalloc(sizeof(int), length_b); + second_best_result = xcalloc(sizeof(int), length_b); + certainties = xcalloc(sizeof(int), length_b); + + /* See get_similarity() for details of similarities. */ + similarity_count = length_b * (max_search_distance_a * 2 + 1); + similarities = xcalloc(sizeof(int), similarity_count); + + for (i = 0; i < length_b; ++i) { + result[i] = -1; + second_best_result[i] = -1; + certainties[i] = CERTAINTY_NOT_CALCULATED; + } + + for (i = 0; i < similarity_count; ++i) + similarities[i] = -1; + + fuzzy_find_matching_lines_recurse(start_a, start_b, + length_a, length_b, + fingerprints_a + start_a, + fingerprints_b + start_b, + similarities, + certainties, + second_best_result, + result, + max_search_distance_a, + max_search_distance_b, + &map_line_number_in_b_to_a); + + free(similarities); + free(certainties); + free(second_best_result); + + return result; +} + +static void fill_origin_fingerprints(struct blame_origin *o) +{ + int *line_starts; + + if (o->fingerprints) + return; + o->num_lines = find_line_starts(&line_starts, o->file.ptr, + o->file.size); + o->fingerprints = xcalloc(sizeof(struct fingerprint), o->num_lines); + get_line_fingerprints(o->fingerprints, o->file.ptr, line_starts, + 0, o->num_lines); + free(line_starts); +} + +static void drop_origin_fingerprints(struct blame_origin *o) +{ + if (o->fingerprints) { + free_line_fingerprints(o->fingerprints, o->num_lines); + o->num_lines = 0; + FREE_AND_NULL(o->fingerprints); + } +} + /* * Given an origin, prepare mmfile_t structure to be used by the * diff machinery */ static void fill_origin_blob(struct diff_options *opt, - struct blame_origin *o, mmfile_t *file, int *num_read_blob) + struct blame_origin *o, mmfile_t *file, + int *num_read_blob, int fill_fingerprints) { if (!o->file.ptr) { enum object_type type; @@ -334,11 +1040,14 @@ static void fill_origin_blob(struct diff_options *opt, } else *file = o->file; + if (fill_fingerprints) + fill_origin_fingerprints(o); } static void drop_origin_blob(struct blame_origin *o) { FREE_AND_NULL(o->file.ptr); + drop_origin_fingerprints(o); } /* @@ -474,7 +1183,10 @@ void blame_coalesce(struct blame_scoreboard *sb) for (ent = sb->ent; ent && (next = ent->next); ent = next) { if (ent->suspect == next->suspect && - ent->s_lno + ent->num_lines == next->s_lno) { + ent->s_lno + ent->num_lines == next->s_lno && + ent->lno + ent->num_lines == next->lno && + ent->ignored == next->ignored && + ent->unblamable == next->unblamable) { ent->num_lines += next->num_lines; ent->next = next->next; blame_origin_decref(next->suspect); @@ -526,7 +1238,7 @@ static int fill_blob_sha1_and_mode(struct repository *r, { if (!is_null_oid(&origin->blob_oid)) return 0; - if (get_tree_entry(&origin->commit->object.oid, origin->path, &origin->blob_oid, &origin->mode)) + if (get_tree_entry(r, &origin->commit->object.oid, origin->path, &origin->blob_oid, &origin->mode)) goto error_out; if (oid_object_info(r, &origin->blob_oid, NULL) != OBJ_BLOB) goto error_out; @@ -537,13 +1249,74 @@ static int fill_blob_sha1_and_mode(struct repository *r, return -1; } +struct blame_bloom_data { + /* + * Changed-path Bloom filter keys. These can help prevent + * computing diffs against first parents, but we need to + * expand the list as code is moved or files are renamed. + */ + struct bloom_filter_settings *settings; + struct bloom_key **keys; + int nr; + int alloc; +}; + +static int bloom_count_queries = 0; +static int bloom_count_no = 0; +static int maybe_changed_path(struct repository *r, + struct blame_origin *origin, + struct blame_bloom_data *bd) +{ + int i; + struct bloom_filter *filter; + + if (!bd) + return 1; + + if (commit_graph_generation(origin->commit) == GENERATION_NUMBER_INFINITY) + return 1; + + filter = get_bloom_filter(r, origin->commit); + + if (!filter) + return 1; + + bloom_count_queries++; + for (i = 0; i < bd->nr; i++) { + if (bloom_filter_contains(filter, + bd->keys[i], + bd->settings)) + return 1; + } + + bloom_count_no++; + return 0; +} + +static void add_bloom_key(struct blame_bloom_data *bd, + const char *path) +{ + if (!bd) + return; + + if (bd->nr >= bd->alloc) { + bd->alloc *= 2; + REALLOC_ARRAY(bd->keys, bd->alloc); + } + + bd->keys[bd->nr] = xmalloc(sizeof(struct bloom_key)); + fill_bloom_key(path, strlen(path), bd->keys[bd->nr], bd->settings); + bd->nr++; +} + /* * We have an origin -- check if the same path exists in the * parent and return an origin structure to represent it. */ static struct blame_origin *find_origin(struct repository *r, struct commit *parent, - struct blame_origin *origin) + struct blame_origin *origin, + struct blame_bloom_data *bd) { struct blame_origin *porigin; struct diff_options diff_opts; @@ -577,10 +1350,18 @@ static struct blame_origin *find_origin(struct repository *r, if (is_null_oid(&origin->commit->object.oid)) do_diff_cache(get_commit_tree_oid(parent), &diff_opts); - else - diff_tree_oid(get_commit_tree_oid(parent), - get_commit_tree_oid(origin->commit), - "", &diff_opts); + else { + int compute_diff = 1; + if (origin->commit->parents && + oideq(&parent->object.oid, + &origin->commit->parents->item->object.oid)) + compute_diff = maybe_changed_path(r, origin, bd); + + if (compute_diff) + diff_tree_oid(get_commit_tree_oid(parent), + get_commit_tree_oid(origin->commit), + "", &diff_opts); + } diffcore_std(&diff_opts); if (!diff_queued_diff.nr) { @@ -632,7 +1413,8 @@ static struct blame_origin *find_origin(struct repository *r, */ static struct blame_origin *find_rename(struct repository *r, struct commit *parent, - struct blame_origin *origin) + struct blame_origin *origin, + struct blame_bloom_data *bd) { struct blame_origin *porigin = NULL; struct diff_options diff_opts; @@ -657,6 +1439,7 @@ static struct blame_origin *find_rename(struct repository *r, struct diff_filepair *p = diff_queued_diff.queue[i]; if ((p->status == 'R' || p->status == 'C') && !strcmp(p->two->path, origin->path)) { + add_bloom_key(bd, p->one->path); porigin = get_origin(parent, p->one->path); oidcpy(&porigin->blob_oid, &p->one->oid); porigin->mode = p->one->mode; @@ -724,8 +1507,14 @@ static void split_overlap(struct blame_entry *split, struct blame_origin *parent) { int chunk_end_lno; + int i; memset(split, 0, sizeof(struct blame_entry [3])); + for (i = 0; i < 3; i++) { + split[i].ignored = e->ignored; + split[i].unblamable = e->unblamable; + } + if (e->s_lno < tlno) { /* there is a pre-chunk part not blamed on parent */ split[0].suspect = blame_origin_incref(e->suspect); @@ -834,6 +1623,164 @@ static struct blame_entry *reverse_blame(struct blame_entry *head, } /* + * Splits a blame entry into two entries at 'len' lines. The original 'e' + * consists of len lines, i.e. [e->lno, e->lno + len), and the second part, + * which is returned, consists of the remainder: [e->lno + len, e->lno + + * e->num_lines). The caller needs to sort out the reference counting for the + * new entry's suspect. + */ +static struct blame_entry *split_blame_at(struct blame_entry *e, int len, + struct blame_origin *new_suspect) +{ + struct blame_entry *n = xcalloc(1, sizeof(struct blame_entry)); + + n->suspect = new_suspect; + n->ignored = e->ignored; + n->unblamable = e->unblamable; + n->lno = e->lno + len; + n->s_lno = e->s_lno + len; + n->num_lines = e->num_lines - len; + e->num_lines = len; + e->score = 0; + return n; +} + +struct blame_line_tracker { + int is_parent; + int s_lno; +}; + +static int are_lines_adjacent(struct blame_line_tracker *first, + struct blame_line_tracker *second) +{ + return first->is_parent == second->is_parent && + first->s_lno + 1 == second->s_lno; +} + +static int scan_parent_range(struct fingerprint *p_fps, + struct fingerprint *t_fps, int t_idx, + int from, int nr_lines) +{ + int sim, p_idx; + #define FINGERPRINT_FILE_THRESHOLD 10 + int best_sim_val = FINGERPRINT_FILE_THRESHOLD; + int best_sim_idx = -1; + + for (p_idx = from; p_idx < from + nr_lines; p_idx++) { + sim = fingerprint_similarity(&t_fps[t_idx], &p_fps[p_idx]); + if (sim < best_sim_val) + continue; + /* Break ties with the closest-to-target line number */ + if (sim == best_sim_val && best_sim_idx != -1 && + abs(best_sim_idx - t_idx) < abs(p_idx - t_idx)) + continue; + best_sim_val = sim; + best_sim_idx = p_idx; + } + return best_sim_idx; +} + +/* + * The first pass checks the blame entry (from the target) against the parent's + * diff chunk. If that fails for a line, the second pass tries to match that + * line to any part of parent file. That catches cases where a change was + * broken into two chunks by 'context.' + */ +static void guess_line_blames(struct blame_origin *parent, + struct blame_origin *target, + int tlno, int offset, int same, int parent_len, + struct blame_line_tracker *line_blames) +{ + int i, best_idx, target_idx; + int parent_slno = tlno + offset; + int *fuzzy_matches; + + fuzzy_matches = fuzzy_find_matching_lines(parent, target, + tlno, parent_slno, same, + parent_len); + for (i = 0; i < same - tlno; i++) { + target_idx = tlno + i; + if (fuzzy_matches && fuzzy_matches[i] >= 0) { + best_idx = fuzzy_matches[i]; + } else { + best_idx = scan_parent_range(parent->fingerprints, + target->fingerprints, + target_idx, 0, + parent->num_lines); + } + if (best_idx >= 0) { + line_blames[i].is_parent = 1; + line_blames[i].s_lno = best_idx; + } else { + line_blames[i].is_parent = 0; + line_blames[i].s_lno = target_idx; + } + } + free(fuzzy_matches); +} + +/* + * This decides which parts of a blame entry go to the parent (added to the + * ignoredp list) and which stay with the target (added to the diffp list). The + * actual decision was made in a separate heuristic function, and those answers + * for the lines in 'e' are in line_blames. This consumes e, essentially + * putting it on a list. + * + * Note that the blame entries on the ignoredp list are not necessarily sorted + * with respect to the parent's line numbers yet. + */ +static void ignore_blame_entry(struct blame_entry *e, + struct blame_origin *parent, + struct blame_entry **diffp, + struct blame_entry **ignoredp, + struct blame_line_tracker *line_blames) +{ + int entry_len, nr_lines, i; + + /* + * We carve new entries off the front of e. Each entry comes from a + * contiguous chunk of lines: adjacent lines from the same origin + * (either the parent or the target). + */ + entry_len = 1; + nr_lines = e->num_lines; /* e changes in the loop */ + for (i = 0; i < nr_lines; i++) { + struct blame_entry *next = NULL; + + /* + * We are often adjacent to the next line - only split the blame + * entry when we have to. + */ + if (i + 1 < nr_lines) { + if (are_lines_adjacent(&line_blames[i], + &line_blames[i + 1])) { + entry_len++; + continue; + } + next = split_blame_at(e, entry_len, + blame_origin_incref(e->suspect)); + } + if (line_blames[i].is_parent) { + e->ignored = 1; + blame_origin_decref(e->suspect); + e->suspect = blame_origin_incref(parent); + e->s_lno = line_blames[i - entry_len + 1].s_lno; + e->next = *ignoredp; + *ignoredp = e; + } else { + e->unblamable = 1; + /* e->s_lno is already in the target's address space. */ + e->next = *diffp; + *diffp = e; + } + assert(e->num_lines == entry_len); + e = next; + entry_len = 1; + } + assert(!e); +} + +/* * Process one hunk from the patch between the current suspect for * blame_entry e and its parent. This first blames any unfinished * entries before the chunk (which is where target and parent start @@ -842,13 +1789,20 @@ static struct blame_entry *reverse_blame(struct blame_entry *head, * -C options may lead to overlapping/duplicate source line number * ranges, all we can rely on from sorting/merging is the order of the * first suspect line number. + * + * tlno: line number in the target where this chunk begins + * same: line number in the target where this chunk ends + * offset: add to tlno to get the chunk starting point in the parent + * parent_len: number of lines in the parent chunk */ static void blame_chunk(struct blame_entry ***dstq, struct blame_entry ***srcq, - int tlno, int offset, int same, - struct blame_origin *parent) + int tlno, int offset, int same, int parent_len, + struct blame_origin *parent, + struct blame_origin *target, int ignore_diffs) { struct blame_entry *e = **srcq; - struct blame_entry *samep = NULL, *diffp = NULL; + struct blame_entry *samep = NULL, *diffp = NULL, *ignoredp = NULL; + struct blame_line_tracker *line_blames = NULL; while (e && e->s_lno < tlno) { struct blame_entry *next = e->next; @@ -859,14 +1813,9 @@ static void blame_chunk(struct blame_entry ***dstq, struct blame_entry ***srcq, */ if (e->s_lno + e->num_lines > tlno) { /* Move second half to a new record */ - int len = tlno - e->s_lno; - struct blame_entry *n = xcalloc(1, sizeof (struct blame_entry)); - n->suspect = e->suspect; - n->lno = e->lno + len; - n->s_lno = e->s_lno + len; - n->num_lines = e->num_lines - len; - e->num_lines = len; - e->score = 0; + struct blame_entry *n; + + n = split_blame_at(e, tlno - e->s_lno, e->suspect); /* Push new record to diffp */ n->next = diffp; diffp = n; @@ -902,6 +1851,14 @@ static void blame_chunk(struct blame_entry ***dstq, struct blame_entry ***srcq, */ samep = NULL; diffp = NULL; + + if (ignore_diffs && same - tlno > 0) { + line_blames = xcalloc(sizeof(struct blame_line_tracker), + same - tlno); + guess_line_blames(parent, target, tlno, offset, same, + parent_len, line_blames); + } + while (e && e->s_lno < same) { struct blame_entry *next = e->next; @@ -913,22 +1870,37 @@ static void blame_chunk(struct blame_entry ***dstq, struct blame_entry ***srcq, * Move second half to a new record to be * processed by later chunks */ - int len = same - e->s_lno; - struct blame_entry *n = xcalloc(1, sizeof (struct blame_entry)); - n->suspect = blame_origin_incref(e->suspect); - n->lno = e->lno + len; - n->s_lno = e->s_lno + len; - n->num_lines = e->num_lines - len; - e->num_lines = len; - e->score = 0; + struct blame_entry *n; + + n = split_blame_at(e, same - e->s_lno, + blame_origin_incref(e->suspect)); /* Push new record to samep */ n->next = samep; samep = n; } - e->next = diffp; - diffp = e; + if (ignore_diffs) { + ignore_blame_entry(e, parent, &diffp, &ignoredp, + line_blames + e->s_lno - tlno); + } else { + e->next = diffp; + diffp = e; + } e = next; } + free(line_blames); + if (ignoredp) { + /* + * Note ignoredp is not sorted yet, and thus neither is dstq. + * That list must be sorted before we queue_blames(). We defer + * sorting until after all diff hunks are processed, so that + * guess_line_blames() can pick *any* line in the parent. The + * slight drawback is that we end up sorting all blame entries + * passed to the parent, including those that are unrelated to + * changes made by the ignored commit. + */ + **dstq = reverse_blame(ignoredp, **dstq); + *dstq = &ignoredp->next; + } **srcq = reverse_blame(diffp, reverse_blame(samep, e)); /* Move across elements that are in the unblamable portion */ if (diffp) @@ -937,7 +1909,9 @@ static void blame_chunk(struct blame_entry ***dstq, struct blame_entry ***srcq, struct blame_chunk_cb_data { struct blame_origin *parent; + struct blame_origin *target; long offset; + int ignore_diffs; struct blame_entry **dstq; struct blame_entry **srcq; }; @@ -950,7 +1924,8 @@ static int blame_chunk_cb(long start_a, long count_a, if (start_a - start_b != d->offset) die("internal error in blame::blame_chunk_cb"); blame_chunk(&d->dstq, &d->srcq, start_b, start_a - start_b, - start_b + count_b, d->parent); + start_b + count_b, count_a, d->parent, d->target, + d->ignore_diffs); d->offset = start_a + count_a - (start_b + count_b); return 0; } @@ -962,7 +1937,7 @@ static int blame_chunk_cb(long start_a, long count_a, */ static void pass_blame_to_parent(struct blame_scoreboard *sb, struct blame_origin *target, - struct blame_origin *parent) + struct blame_origin *parent, int ignore_diffs) { mmfile_t file_p, file_o; struct blame_chunk_cb_data d; @@ -972,11 +1947,15 @@ static void pass_blame_to_parent(struct blame_scoreboard *sb, return; /* nothing remains for this target */ d.parent = parent; + d.target = target; d.offset = 0; + d.ignore_diffs = ignore_diffs; d.dstq = &newdest; d.srcq = &target->suspects; - fill_origin_blob(&sb->revs->diffopt, parent, &file_p, &sb->num_read_blob); - fill_origin_blob(&sb->revs->diffopt, target, &file_o, &sb->num_read_blob); + fill_origin_blob(&sb->revs->diffopt, parent, &file_p, + &sb->num_read_blob, ignore_diffs); + fill_origin_blob(&sb->revs->diffopt, target, &file_o, + &sb->num_read_blob, ignore_diffs); sb->num_get_patch++; if (diff_hunks(&file_p, &file_o, blame_chunk_cb, &d, sb->xdl_opts)) @@ -984,8 +1963,13 @@ static void pass_blame_to_parent(struct blame_scoreboard *sb, oid_to_hex(&parent->commit->object.oid), oid_to_hex(&target->commit->object.oid)); /* The rest are the same as the parent */ - blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, parent); + blame_chunk(&d.dstq, &d.srcq, INT_MAX, d.offset, INT_MAX, 0, + parent, target, 0); *d.dstq = NULL; + if (ignore_diffs) + newdest = llist_mergesort(newdest, get_next_blame, + set_next_blame, + compare_blame_suspect); queue_blames(sb, parent, newdest); return; @@ -1182,7 +2166,8 @@ static void find_move_in_parent(struct blame_scoreboard *sb, if (!unblamed) return; /* nothing remains for this target */ - fill_origin_blob(&sb->revs->diffopt, parent, &file_p, &sb->num_read_blob); + fill_origin_blob(&sb->revs->diffopt, parent, &file_p, + &sb->num_read_blob, 0); if (!file_p.ptr) return; @@ -1311,7 +2296,8 @@ static void find_copy_in_parent(struct blame_scoreboard *sb, norigin = get_origin(parent, p->one->path); oidcpy(&norigin->blob_oid, &p->one->oid); norigin->mode = p->one->mode; - fill_origin_blob(&sb->revs->diffopt, norigin, &file_p, &sb->num_read_blob); + fill_origin_blob(&sb->revs->diffopt, norigin, &file_p, + &sb->num_read_blob, 0); if (!file_p.ptr) continue; @@ -1420,6 +2406,11 @@ static void distribute_blame(struct blame_scoreboard *sb, struct blame_entry *bl #define MAXSG 16 +typedef struct blame_origin *(*blame_find_alg)(struct repository *, + struct commit *, + struct blame_origin *, + struct blame_bloom_data *); + static void pass_blame(struct blame_scoreboard *sb, struct blame_origin *origin, int opt) { struct rev_info *revs = sb->revs; @@ -1444,8 +2435,7 @@ static void pass_blame(struct blame_scoreboard *sb, struct blame_origin *origin, * common cases, then we look for renames in the second pass. */ for (pass = 0; pass < 2 - sb->no_whole_file_rename; pass++) { - struct blame_origin *(*find)(struct repository *, struct commit *, struct blame_origin *); - find = pass ? find_rename : find_origin; + blame_find_alg find = pass ? find_rename : find_origin; for (i = 0, sg = first_scapegoat(revs, commit, sb->reverse); i < num_sg && sg; @@ -1457,7 +2447,7 @@ static void pass_blame(struct blame_scoreboard *sb, struct blame_origin *origin, continue; if (parse_commit(p)) continue; - porigin = find(sb->repo, p, origin); + porigin = find(sb->repo, p, origin, sb->bloom_data); if (!porigin) continue; if (oideq(&porigin->blob_oid, &origin->blob_oid)) { @@ -1489,12 +2479,35 @@ static void pass_blame(struct blame_scoreboard *sb, struct blame_origin *origin, blame_origin_incref(porigin); origin->previous = porigin; } - pass_blame_to_parent(sb, origin, porigin); + pass_blame_to_parent(sb, origin, porigin, 0); if (!origin->suspects) goto finish; } /* + * Pass remaining suspects for ignored commits to their parents. + */ + if (oidset_contains(&sb->ignore_list, &commit->object.oid)) { + for (i = 0, sg = first_scapegoat(revs, commit, sb->reverse); + i < num_sg && sg; + sg = sg->next, i++) { + struct blame_origin *porigin = sg_origin[i]; + + if (!porigin) + continue; + pass_blame_to_parent(sb, origin, porigin, 1); + /* + * Preemptively drop porigin so we can refresh the + * fingerprints if we use the parent again, which can + * occur if you ignore back-to-back commits. + */ + drop_origin_blob(porigin); + if (!origin->suspects) + goto finish; + } + } + + /* * Optionally find moves in parents' files. */ if (opt & PICKAXE_BLAME_MOVE) { @@ -1556,7 +2569,8 @@ finish: } for (i = 0; i < num_sg; i++) { if (sg_origin[i]) { - drop_origin_blob(sg_origin[i]); + if (!sg_origin[i]->suspects) + drop_origin_blob(sg_origin[i]); blame_origin_decref(sg_origin[i]); } } @@ -1633,37 +2647,14 @@ void assign_blame(struct blame_scoreboard *sb, int opt) } } -static const char *get_next_line(const char *start, const char *end) -{ - const char *nl = memchr(start, '\n', end - start); - return nl ? nl + 1 : end; -} - /* * To allow quick access to the contents of nth line in the * final image, prepare an index in the scoreboard. */ static int prepare_lines(struct blame_scoreboard *sb) { - const char *buf = sb->final_buf; - unsigned long len = sb->final_buf_size; - const char *end = buf + len; - const char *p; - int *lineno; - int num = 0; - - for (p = buf; p < end; p = get_next_line(p, end)) - num++; - - ALLOC_ARRAY(sb->lineno, num + 1); - lineno = sb->lineno; - - for (p = buf; p < end; p = get_next_line(p, end)) - *lineno++ = p - buf; - - *lineno = len; - - sb->num_lines = num; + sb->num_lines = find_line_starts(&sb->lineno, sb->final_buf, + sb->final_buf_size); return sb->num_lines; } @@ -1678,8 +2669,8 @@ static struct commit *find_single_final(struct rev_info *revs, struct object *obj = revs->pending.objects[i].item; if (obj->flags & UNINTERESTING) continue; - obj = deref_tag(the_repository, obj, NULL, 0); - if (obj->type != OBJ_COMMIT) + obj = deref_tag(revs->repo, obj, NULL, 0); + if (!obj || obj->type != OBJ_COMMIT) die("Non commit %s?", revs->pending.objects[i].name); if (found) die("More than one commit to dig from %s and %s?", @@ -1709,14 +2700,14 @@ static struct commit *dwim_reverse_initial(struct rev_info *revs, /* Is that sole rev a committish? */ obj = revs->pending.objects[0].item; - obj = deref_tag(the_repository, obj, NULL, 0); - if (obj->type != OBJ_COMMIT) + obj = deref_tag(revs->repo, obj, NULL, 0); + if (!obj || obj->type != OBJ_COMMIT) return NULL; /* Do we have HEAD? */ if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, &head_oid, NULL)) return NULL; - head_commit = lookup_commit_reference_gently(the_repository, + head_commit = lookup_commit_reference_gently(revs->repo, &head_oid, 1); if (!head_commit) return NULL; @@ -1745,8 +2736,8 @@ static struct commit *find_single_initial(struct rev_info *revs, struct object *obj = revs->pending.objects[i].item; if (!(obj->flags & UNINTERESTING)) continue; - obj = deref_tag(the_repository, obj, NULL, 0); - if (obj->type != OBJ_COMMIT) + obj = deref_tag(revs->repo, obj, NULL, 0); + if (!obj || obj->type != OBJ_COMMIT) die("Non commit %s?", revs->pending.objects[i].name); if (found) die("More than one commit to dig up from, %s and %s?", @@ -1773,7 +2764,6 @@ void init_scoreboard(struct blame_scoreboard *sb) } void setup_scoreboard(struct blame_scoreboard *sb, - const char *path, struct blame_origin **orig) { const char *final_commit_name = NULL; @@ -1812,7 +2802,7 @@ void setup_scoreboard(struct blame_scoreboard *sb, setup_work_tree(); sb->final = fake_working_tree_commit(sb->repo, &sb->revs->diffopt, - path, sb->contents_from); + sb->path, sb->contents_from); add_pending_object(sb->revs, &(sb->final->object), ":"); } @@ -1855,12 +2845,12 @@ void setup_scoreboard(struct blame_scoreboard *sb, sb->final_buf_size = o->file.size; } else { - o = get_origin(sb->final, path); + o = get_origin(sb->final, sb->path); if (fill_blob_sha1_and_mode(sb->repo, o)) - die(_("no such path %s in %s"), path, final_commit_name); + die(_("no such path %s in %s"), sb->path, final_commit_name); if (sb->revs->diffopt.flags.allow_textconv && - textconv_object(sb->repo, path, o->mode, &o->blob_oid, 1, (char **) &sb->final_buf, + textconv_object(sb->repo, sb->path, o->mode, &o->blob_oid, 1, (char **) &sb->final_buf, &sb->final_buf_size)) ; else @@ -1870,7 +2860,7 @@ void setup_scoreboard(struct blame_scoreboard *sb, if (!sb->final_buf) die(_("cannot read blob %s for path %s"), oid_to_hex(&o->blob_oid), - path); + sb->path); } sb->num_read_blob++; prepare_lines(sb); @@ -1896,3 +2886,46 @@ struct blame_entry *blame_entry_prepend(struct blame_entry *head, blame_origin_incref(o); return new_head; } + +void setup_blame_bloom_data(struct blame_scoreboard *sb) +{ + struct blame_bloom_data *bd; + struct bloom_filter_settings *bs; + + if (!sb->repo->objects->commit_graph) + return; + + bs = get_bloom_filter_settings(sb->repo); + if (!bs) + return; + + bd = xmalloc(sizeof(struct blame_bloom_data)); + + bd->settings = bs; + + bd->alloc = 4; + bd->nr = 0; + ALLOC_ARRAY(bd->keys, bd->alloc); + + add_bloom_key(bd, sb->path); + + sb->bloom_data = bd; +} + +void cleanup_scoreboard(struct blame_scoreboard *sb) +{ + if (sb->bloom_data) { + int i; + for (i = 0; i < sb->bloom_data->nr; i++) { + free(sb->bloom_data->keys[i]->hashes); + free(sb->bloom_data->keys[i]); + } + free(sb->bloom_data->keys); + FREE_AND_NULL(sb->bloom_data); + + trace2_data_intmax("blame", sb->repo, + "bloom/queries", bloom_count_queries); + trace2_data_intmax("blame", sb->repo, + "bloom/response-no", bloom_count_no); + } +} |