| /* |
| * Copyright (C) 2005 Junio C Hamano |
| */ |
| #ifndef DIFFCORE_H |
| #define DIFFCORE_H |
| |
| #include "hash.h" |
| |
| struct diff_options; |
| struct mem_pool; |
| struct oid_array; |
| struct repository; |
| struct strintmap; |
| struct strmap; |
| struct userdiff_driver; |
| |
| /* This header file is internal between diff.c and its diff transformers |
| * (e.g. diffcore-rename, diffcore-pickaxe). Never include this header |
| * in anything else. |
| */ |
| |
| /* We internally use unsigned short as the score value, |
| * and rely on an int capable to hold 32-bits. -B can take |
| * -Bmerge_score/break_score format and the two scores are |
| * passed around in one int (high 16-bit for merge and low 16-bit |
| * for break). |
| */ |
| #define MAX_SCORE 60000.0 |
| #define DEFAULT_RENAME_SCORE 30000 /* rename/copy similarity minimum (50%) */ |
| #define DEFAULT_BREAK_SCORE 30000 /* minimum for break to happen (50%) */ |
| #define DEFAULT_MERGE_SCORE 36000 /* maximum for break-merge to happen (60%) */ |
| |
| #define MINIMUM_BREAK_SIZE 400 /* do not break a file smaller than this */ |
| |
| /** |
| * the internal representation for a single file (blob). It records the blob |
| * object name (if known -- for a work tree file it typically is a NUL SHA-1), |
| * filemode and pathname. This is what the `diff_addremove()`, `diff_change()` |
| * and `diff_unmerge()` synthesize and feed `diff_queue()` function with. |
| */ |
| struct diff_filespec { |
| struct object_id oid; |
| char *path; |
| void *data; |
| void *cnt_data; |
| unsigned long size; |
| int count; /* Reference count */ |
| int rename_used; /* Count of rename users */ |
| unsigned short mode; /* file mode */ |
| unsigned oid_valid : 1; /* if true, use oid and trust mode; |
| * if false, use the name and read from |
| * the filesystem. |
| */ |
| #define DIFF_FILE_VALID(spec) (((spec)->mode) != 0) |
| unsigned should_free : 1; /* data should be free()'ed */ |
| unsigned should_munmap : 1; /* data should be munmap()'ed */ |
| unsigned dirty_submodule : 2; /* For submodules: its work tree is dirty */ |
| #define DIRTY_SUBMODULE_UNTRACKED 1 |
| #define DIRTY_SUBMODULE_MODIFIED 2 |
| unsigned is_stdin : 1; |
| unsigned has_more_entries : 1; /* only appear in combined diff */ |
| /* data should be considered "binary"; -1 means "don't know yet" */ |
| signed int is_binary : 2; |
| struct userdiff_driver *driver; |
| }; |
| |
| struct diff_filespec *alloc_filespec(const char *); |
| void free_filespec(struct diff_filespec *); |
| void fill_filespec(struct diff_filespec *, const struct object_id *, |
| int, unsigned short); |
| |
| /* |
| * Prefetch the entries in diff_queued_diff. The parameter is a pointer to a |
| * struct repository. |
| */ |
| void diff_queued_diff_prefetch(void *repository); |
| |
| struct diff_populate_filespec_options { |
| unsigned check_size_only : 1; |
| unsigned check_binary : 1; |
| |
| /* |
| * If an object is missing, diff_populate_filespec() will invoke this |
| * callback before attempting to read that object again. |
| */ |
| void (*missing_object_cb)(void *); |
| void *missing_object_data; |
| }; |
| int diff_populate_filespec(struct repository *, struct diff_filespec *, |
| const struct diff_populate_filespec_options *); |
| void diff_free_filespec_data(struct diff_filespec *); |
| void diff_free_filespec_blob(struct diff_filespec *); |
| int diff_filespec_is_binary(struct repository *, struct diff_filespec *); |
| |
| /** |
| * This records a pair of `struct diff_filespec`; the filespec for a file in |
| * the "old" set (i.e. preimage) is called `one`, and the filespec for a file |
| * in the "new" set (i.e. postimage) is called `two`. A change that represents |
| * file creation has NULL in `one`, and file deletion has NULL in `two`. |
| * |
| * A `filepair` starts pointing at `one` and `two` that are from the same |
| * filename, but `diffcore_std()` can break pairs and match component filespecs |
| * with other filespecs from a different filepair to form new filepair. This is |
| * called 'rename detection'. |
| */ |
| struct diff_filepair { |
| struct diff_filespec *one; |
| struct diff_filespec *two; |
| unsigned short int score; |
| char status; /* M C R A D U etc. (see Documentation/diff-format.txt or DIFF_STATUS_* in diff.h) */ |
| unsigned broken_pair : 1; |
| unsigned renamed_pair : 1; |
| unsigned is_unmerged : 1; |
| unsigned done_skip_stat_unmatch : 1; |
| unsigned skip_stat_unmatch_result : 1; |
| }; |
| |
| #define DIFF_PAIR_UNMERGED(p) ((p)->is_unmerged) |
| |
| #define DIFF_PAIR_RENAME(p) ((p)->renamed_pair) |
| |
| #define DIFF_PAIR_BROKEN(p) \ |
| ( (!DIFF_FILE_VALID((p)->one) != !DIFF_FILE_VALID((p)->two)) && \ |
| ((p)->broken_pair != 0) ) |
| |
| #define DIFF_PAIR_TYPE_CHANGED(p) \ |
| ((S_IFMT & (p)->one->mode) != (S_IFMT & (p)->two->mode)) |
| |
| #define DIFF_PAIR_MODE_CHANGED(p) ((p)->one->mode != (p)->two->mode) |
| |
| void diff_free_filepair(struct diff_filepair *); |
| void pool_diff_free_filepair(struct mem_pool *pool, |
| struct diff_filepair *p); |
| |
| int diff_unmodified_pair(struct diff_filepair *); |
| |
| /** |
| * This is a collection of filepairs. Notable members are: |
| * |
| * - `queue`: |
| * An array of pointers to `struct diff_filepair`. This dynamically grows as |
| * you add filepairs; |
| * |
| * - `alloc`: |
| * The allocated size of the `queue` array; |
| * |
| * - `nr`: |
| * The number of elements in the `queue` array. |
| */ |
| struct diff_queue_struct { |
| struct diff_filepair **queue; |
| int alloc; |
| int nr; |
| }; |
| |
| #define DIFF_QUEUE_INIT { 0 } |
| |
| void diff_queue_init(struct diff_queue_struct *q); |
| void diff_queue_clear(struct diff_queue_struct *q); |
| |
| extern struct diff_queue_struct diff_queued_diff; |
| struct diff_filepair *diff_queue(struct diff_queue_struct *, |
| struct diff_filespec *, |
| struct diff_filespec *); |
| void diff_q(struct diff_queue_struct *, struct diff_filepair *); |
| |
| /* dir_rename_relevance: the reason we want rename information for a dir */ |
| enum dir_rename_relevance { |
| NOT_RELEVANT = 0, |
| RELEVANT_FOR_ANCESTOR = 1, |
| RELEVANT_FOR_SELF = 2 |
| }; |
| /* file_rename_relevance: the reason(s) we want rename information for a file */ |
| enum file_rename_relevance { |
| RELEVANT_NO_MORE = 0, /* i.e. NOT relevant */ |
| RELEVANT_CONTENT = 1, |
| RELEVANT_LOCATION = 2 |
| }; |
| |
| void partial_clear_dir_rename_count(struct strmap *dir_rename_count); |
| |
| void diffcore_break(struct repository *, int); |
| void diffcore_rename(struct diff_options *); |
| void diffcore_rename_extended(struct diff_options *options, |
| struct mem_pool *pool, |
| struct strintmap *relevant_sources, |
| struct strintmap *dirs_removed, |
| struct strmap *dir_rename_count, |
| struct strmap *cached_pairs); |
| void diffcore_merge_broken(void); |
| void diffcore_pickaxe(struct diff_options *); |
| void diffcore_order(const char *orderfile); |
| void diffcore_rotate(struct diff_options *); |
| |
| /* low-level interface to diffcore_order */ |
| struct obj_order { |
| void *obj; /* setup by caller */ |
| |
| /* setup/used by order_objects() */ |
| int orig_order; |
| int order; |
| }; |
| |
| typedef const char *(*obj_path_fn_t)(void *obj); |
| |
| void order_objects(const char *orderfile, obj_path_fn_t obj_path, |
| struct obj_order *objs, int nr); |
| |
| #define DIFF_DEBUG 0 |
| #if DIFF_DEBUG |
| void diff_debug_filespec(struct diff_filespec *, int, const char *); |
| void diff_debug_filepair(const struct diff_filepair *, int); |
| void diff_debug_queue(const char *, struct diff_queue_struct *); |
| #else |
| #define diff_debug_filespec(a,b,c) do { /* nothing */ } while (0) |
| #define diff_debug_filepair(a,b) do { /* nothing */ } while (0) |
| #define diff_debug_queue(a,b) do { /* nothing */ } while (0) |
| #endif |
| |
| int diffcore_count_changes(struct repository *r, |
| struct diff_filespec *src, |
| struct diff_filespec *dst, |
| void **src_count_p, |
| void **dst_count_p, |
| unsigned long *src_copied, |
| unsigned long *literal_added); |
| |
| /* |
| * If filespec contains an OID and if that object is missing from the given |
| * repository, add that OID to to_fetch. |
| */ |
| void diff_add_if_missing(struct repository *r, |
| struct oid_array *to_fetch, |
| const struct diff_filespec *filespec); |
| |
| #endif |