diff.h

   1 /*
   2  * Copyright (C) 2005 Junio C Hamano
   3  */
   4 #ifndef DIFF_H
   5 #define DIFF_H
   6
   7 #include "tree-walk.h"
   8
   9 struct diff_options;
  10
  11 typedef void (*change_fn_t)(struct diff_options *options,
  12                  unsigned old_mode, unsigned new_mode,
  13                  const unsigned char *old_sha1,
  14                  const unsigned char *new_sha1,
  15                  const char *base, const char *path);
  16
  17 typedef void (*add_remove_fn_t)(struct diff_options *options,
  18                     int addremove, unsigned mode,
  19                     const unsigned char *sha1,
  20                     const char *base, const char *path);
  21
  22 struct diff_options {
  23         const char *filter;
  24         const char *orderfile;
  25         const char *pickaxe;
  26         unsigned recursive:1,
  27                  tree_in_recursive:1,
  28                  full_index:1;
  29         int break_opt;
  30         int detect_rename;
  31         int find_copies_harder;
  32         int line_termination;
  33         int output_format;
  34         int pickaxe_opts;
  35         int rename_score;
  36         int reverse_diff;
  37         int rename_limit;
  38         int setup;
  39         int abbrev;
  40
  41         int nr_paths;
  42         const char **paths;
  43         int *pathlens;
  44         change_fn_t change;
  45         add_remove_fn_t add_remove;
  46 };
  47
  48 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
  49 extern void diff_tree_release_paths(struct diff_options *);
  50 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
  51                      const char *base, struct diff_options *opt);
  52 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
  53                           const char *base, struct diff_options *opt);
  54
  55 struct combine_diff_path {
  56         struct combine_diff_path *next;
  57         int len;
  58         char *path;
  59         unsigned int mode;
  60         unsigned char sha1[20];
  61         struct combine_diff_parent {
  62                 char status;
  63                 unsigned int mode;
  64                 unsigned char sha1[20];
  65         } parent[FLEX_ARRAY];
  66 };
  67 #define combine_diff_path_size(n, l) \
  68         (sizeof(struct combine_diff_path) + \
  69          sizeof(struct combine_diff_parent) * (n) + (l) + 1)
  70
  71 extern int show_combined_diff(struct combine_diff_path *elem, int num_parent,
  72                               int dense, const char *header,
  73                               struct diff_options *);
  74
  75 extern const char *diff_tree_combined_merge(const unsigned char *sha1, const char *, int, struct diff_options *opt);
  76
  77 extern void diff_addremove(struct diff_options *,
  78                            int addremove,
  79                            unsigned mode,
  80                            const unsigned char *sha1,
  81                            const char *base,
  82                            const char *path);
  83
  84 extern void diff_change(struct diff_options *,
  85                         unsigned mode1, unsigned mode2,
  86                         const unsigned char *sha1,
  87                         const unsigned char *sha2,
  88                         const char *base, const char *path);
  89
  90 extern void diff_unmerge(struct diff_options *,
  91                          const char *path);
  92
  93 extern int diff_scoreopt_parse(const char *opt);
  94
  95 #define DIFF_SETUP_REVERSE              1
  96 #define DIFF_SETUP_USE_CACHE            2
  97 #define DIFF_SETUP_USE_SIZE_CACHE       4
  98
  99 extern int git_diff_config(const char *var, const char *value);
 100 extern void diff_setup(struct diff_options *);
 101 extern int diff_opt_parse(struct diff_options *, const char **, int);
 102 extern int diff_setup_done(struct diff_options *);
 103
 104 #define DIFF_DETECT_RENAME      1
 105 #define DIFF_DETECT_COPY        2
 106
 107 #define DIFF_PICKAXE_ALL        1
 108 #define DIFF_PICKAXE_REGEX      2
 109
 110 extern void diffcore_std(struct diff_options *);
 111
 112 extern void diffcore_std_no_resolve(struct diff_options *);
 113
 114 #define COMMON_DIFF_OPTIONS_HELP \
 115 "\ncommon diff options:\n" \
 116 "  -z            output diff-raw with lines terminated with NUL.\n" \
 117 "  -p            output patch format.\n" \
 118 "  -u            synonym for -p.\n" \
 119 "  --name-only   show only names of changed files.\n" \
 120 "  --name-status show names and status of changed files.\n" \
 121 "  --full-index  show full object name on index lines.\n" \
 122 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 123 "  -R            swap input file pairs.\n" \
 124 "  -B            detect complete rewrites.\n" \
 125 "  -M            detect renames.\n" \
 126 "  -C            detect copies.\n" \
 127 "  --find-copies-harder\n" \
 128 "                try unchanged files as candidate for copy detection.\n" \
 129 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 130 "  -O<file>      reorder diffs according to the <file>.\n" \
 131 "  -S<string>    find filepair whose only one side contains the string.\n" \
 132 "  --pickaxe-all\n" \
 133 "                show all files diff when -S is used and hit is found.\n"
 134
 135 extern int diff_queue_is_empty(void);
 136
 137 #define DIFF_FORMAT_RAW         1
 138 #define DIFF_FORMAT_PATCH       2
 139 #define DIFF_FORMAT_NO_OUTPUT   3
 140 #define DIFF_FORMAT_NAME        4
 141 #define DIFF_FORMAT_NAME_STATUS 5
 142
 143 extern void diff_flush(struct diff_options*);
 144
 145 /* diff-raw status letters */
 146 #define DIFF_STATUS_ADDED               'A'
 147 #define DIFF_STATUS_COPIED              'C'
 148 #define DIFF_STATUS_DELETED             'D'
 149 #define DIFF_STATUS_MODIFIED            'M'
 150 #define DIFF_STATUS_RENAMED             'R'
 151 #define DIFF_STATUS_TYPE_CHANGED        'T'
 152 #define DIFF_STATUS_UNKNOWN             'X'
 153 #define DIFF_STATUS_UNMERGED            'U'
 154
 155 /* these are not diff-raw status letters proper, but used by
 156  * diffcore-filter insn to specify additional restrictions.
 157  */
 158 #define DIFF_STATUS_FILTER_AON          '*'
 159 #define DIFF_STATUS_FILTER_BROKEN       'B'
 160
 161 extern const char *diff_unique_abbrev(const unsigned char *, int);
 162
 163 #endif /* DIFF_H */