| #ifndef BLAME_H |
| #define BLAME_H |
| |
| #include "oidset.h" |
| #include "xdiff-interface.h" |
| #include "prio-queue.h" |
| |
| #define PICKAXE_BLAME_MOVE 01 |
| #define PICKAXE_BLAME_COPY 02 |
| #define PICKAXE_BLAME_COPY_HARDER 04 |
| #define PICKAXE_BLAME_COPY_HARDEST 010 |
| |
| #define BLAME_DEFAULT_MOVE_SCORE 20 |
| #define BLAME_DEFAULT_COPY_SCORE 40 |
| |
| struct fingerprint; |
| |
| /* |
| * One blob in a commit that is being suspected |
| */ |
| struct blame_origin { |
| int refcnt; |
| /* Record preceding blame record for this blob */ |
| struct blame_origin *previous; |
| /* origins are put in a list linked via `next' hanging off the |
| * corresponding commit's util field in order to make finding |
| * them fast. The presence in this chain does not count |
| * towards the origin's reference count. It is tempting to |
| * let it count as long as the commit is pending examination, |
| * but even under circumstances where the commit will be |
| * present multiple times in the priority queue of unexamined |
| * commits, processing the first instance will not leave any |
| * work requiring the origin data for the second instance. An |
| * interspersed commit changing that would have to be |
| * preexisting with a different ancestry and with the same |
| * commit date in order to wedge itself between two instances |
| * of the same commit in the priority queue _and_ produce |
| * blame entries relevant for it. While we don't want to let |
| * us get tripped up by this case, it certainly does not seem |
| * worth optimizing for. |
| */ |
| struct blame_origin *next; |
| struct commit *commit; |
| /* `suspects' contains blame entries that may be attributed to |
| * this origin's commit or to parent commits. When a commit |
| * is being processed, all suspects will be moved, either by |
| * assigning them to an origin in a different commit, or by |
| * shipping them to the scoreboard's ent list because they |
| * cannot be attributed to a different commit. |
| */ |
| struct blame_entry *suspects; |
| mmfile_t file; |
| int num_lines; |
| struct fingerprint *fingerprints; |
| struct object_id blob_oid; |
| unsigned short mode; |
| /* guilty gets set when shipping any suspects to the final |
| * blame list instead of other commits |
| */ |
| char guilty; |
| char path[FLEX_ARRAY]; |
| }; |
| |
| /* |
| * Each group of lines is described by a blame_entry; it can be split |
| * as we pass blame to the parents. They are arranged in linked lists |
| * kept as `suspects' of some unprocessed origin, or entered (when the |
| * blame origin has been finalized) into the scoreboard structure. |
| * While the scoreboard structure is only sorted at the end of |
| * processing (according to final image line number), the lists |
| * attached to an origin are sorted by the target line number. |
| */ |
| struct blame_entry { |
| struct blame_entry *next; |
| |
| /* the first line of this group in the final image; |
| * internally all line numbers are 0 based. |
| */ |
| int lno; |
| |
| /* how many lines this group has */ |
| int num_lines; |
| |
| /* the commit that introduced this group into the final image */ |
| struct blame_origin *suspect; |
| |
| /* the line number of the first line of this group in the |
| * suspect's file; internally all line numbers are 0 based. |
| */ |
| int s_lno; |
| |
| /* how significant this entry is -- cached to avoid |
| * scanning the lines over and over. |
| */ |
| unsigned score; |
| int ignored; |
| int unblamable; |
| }; |
| |
| struct blame_bloom_data; |
| |
| /* |
| * The current state of the blame assignment. |
| */ |
| struct blame_scoreboard { |
| /* the final commit (i.e. where we started digging from) */ |
| struct commit *final; |
| /* Priority queue for commits with unassigned blame records */ |
| struct prio_queue commits; |
| struct repository *repo; |
| struct rev_info *revs; |
| const char *path; |
| |
| /* |
| * The contents in the final image. |
| * Used by many functions to obtain contents of the nth line, |
| * indexed with scoreboard.lineno[blame_entry.lno]. |
| */ |
| const char *final_buf; |
| unsigned long final_buf_size; |
| |
| /* linked list of blames */ |
| struct blame_entry *ent; |
| |
| struct oidset ignore_list; |
| |
| /* look-up a line in the final buffer */ |
| int num_lines; |
| int *lineno; |
| |
| /* stats */ |
| int num_read_blob; |
| int num_get_patch; |
| int num_commits; |
| |
| /* |
| * blame for a blame_entry with score lower than these thresholds |
| * is not passed to the parent using move/copy logic. |
| */ |
| unsigned move_score; |
| unsigned copy_score; |
| |
| /* use this file's contents as the final image */ |
| const char *contents_from; |
| |
| /* flags */ |
| int reverse; |
| int show_root; |
| int xdl_opts; |
| int no_whole_file_rename; |
| int debug; |
| |
| /* callbacks */ |
| void(*on_sanity_fail)(struct blame_scoreboard *, int); |
| void(*found_guilty_entry)(struct blame_entry *, void *); |
| |
| void *found_guilty_entry_data; |
| struct blame_bloom_data *bloom_data; |
| }; |
| |
| /* |
| * Origin is refcounted and usually we keep the blob contents to be |
| * reused. |
| */ |
| static inline struct blame_origin *blame_origin_incref(struct blame_origin *o) |
| { |
| if (o) |
| o->refcnt++; |
| return o; |
| } |
| void blame_origin_decref(struct blame_origin *o); |
| |
| void blame_coalesce(struct blame_scoreboard *sb); |
| void blame_sort_final(struct blame_scoreboard *sb); |
| unsigned blame_entry_score(struct blame_scoreboard *sb, struct blame_entry *e); |
| void assign_blame(struct blame_scoreboard *sb, int opt); |
| const char *blame_nth_line(struct blame_scoreboard *sb, long lno); |
| |
| void init_scoreboard(struct blame_scoreboard *sb); |
| void setup_scoreboard(struct blame_scoreboard *sb, |
| struct blame_origin **orig); |
| void setup_blame_bloom_data(struct blame_scoreboard *sb); |
| void cleanup_scoreboard(struct blame_scoreboard *sb); |
| |
| struct blame_entry *blame_entry_prepend(struct blame_entry *head, |
| long start, long end, |
| struct blame_origin *o); |
| |
| struct blame_origin *get_blame_suspects(struct commit *commit); |
| |
| #endif /* BLAME_H */ |