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                  with_raw:1,
  28                  with_stat:1,
  29                  tree_in_recursive:1,
  30                  full_index:1;
  31         int break_opt;
  32         int detect_rename;
  33         int find_copies_harder;
  34         int line_termination;
  35         int output_format;
  36         int pickaxe_opts;
  37         int rename_score;
  38         int reverse_diff;
  39         int rename_limit;
  40         int setup;
  41         int abbrev;
  42
  43         int nr_paths;
  44         const char **paths;
  45         int *pathlens;
  46         change_fn_t change;
  47         add_remove_fn_t add_remove;
  48 };
  49
  50 extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
  51 extern void diff_tree_release_paths(struct diff_options *);
  52 extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
  53                      const char *base, struct diff_options *opt);
  54 extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
  55                           const char *base, struct diff_options *opt);
  56
  57 struct combine_diff_path {
  58         struct combine_diff_path *next;
  59         int len;
  60         char *path;
  61         unsigned int mode;
  62         unsigned char sha1[20];
  63         struct combine_diff_parent {
  64                 char status;
  65                 unsigned int mode;
  66                 unsigned char sha1[20];
  67         } parent[FLEX_ARRAY];
  68 };
  69 #define combine_diff_path_size(n, l) \
  70         (sizeof(struct combine_diff_path) + \
  71          sizeof(struct combine_diff_parent) * (n) + (l) + 1)
  72
  73 extern int show_combined_diff(struct combine_diff_path *elem, int num_parent,
  74                               int dense, const char *header,
  75                               struct diff_options *);
  76
  77 extern const char *diff_tree_combined_merge(const unsigned char *sha1, const char *, int, struct diff_options *opt);
  78
  79 extern void diff_addremove(struct diff_options *,
  80                            int addremove,
  81                            unsigned mode,
  82                            const unsigned char *sha1,
  83                            const char *base,
  84                            const char *path);
  85
  86 extern void diff_change(struct diff_options *,
  87                         unsigned mode1, unsigned mode2,
  88                         const unsigned char *sha1,
  89                         const unsigned char *sha2,
  90                         const char *base, const char *path);
  91
  92 extern void diff_unmerge(struct diff_options *,
  93                          const char *path);
  94
  95 extern int diff_scoreopt_parse(const char *opt);
  96
  97 #define DIFF_SETUP_REVERSE              1
  98 #define DIFF_SETUP_USE_CACHE            2
  99 #define DIFF_SETUP_USE_SIZE_CACHE       4
 100
 101 extern int git_diff_config(const char *var, const char *value);
 102 extern void diff_setup(struct diff_options *);
 103 extern int diff_opt_parse(struct diff_options *, const char **, int);
 104 extern int diff_setup_done(struct diff_options *);
 105
 106 #define DIFF_DETECT_RENAME      1
 107 #define DIFF_DETECT_COPY        2
 108
 109 #define DIFF_PICKAXE_ALL        1
 110 #define DIFF_PICKAXE_REGEX      2
 111
 112 extern void diffcore_std(struct diff_options *);
 113
 114 extern void diffcore_std_no_resolve(struct diff_options *);
 115
 116 #define COMMON_DIFF_OPTIONS_HELP \
 117 "\ncommon diff options:\n" \
 118 "  -z            output diff-raw with lines terminated with NUL.\n" \
 119 "  -p            output patch format.\n" \
 120 "  -u            synonym for -p.\n" \
 121 "  --patch-with-raw\n" \
 122 "                output both a patch and the diff-raw format.\n" \
 123 "  --stat        show diffstat instead of patch.\n" \
 124 "  --patch-with-stat\n" \
 125 "                output a patch and prepend its diffstat.\n" \
 126 "  --name-only   show only names of changed files.\n" \
 127 "  --name-status show names and status of changed files.\n" \
 128 "  --full-index  show full object name on index lines.\n" \
 129 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 130 "  -R            swap input file pairs.\n" \
 131 "  -B            detect complete rewrites.\n" \
 132 "  -M            detect renames.\n" \
 133 "  -C            detect copies.\n" \
 134 "  --find-copies-harder\n" \
 135 "                try unchanged files as candidate for copy detection.\n" \
 136 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 137 "  -O<file>      reorder diffs according to the <file>.\n" \
 138 "  -S<string>    find filepair whose only one side contains the string.\n" \
 139 "  --pickaxe-all\n" \
 140 "                show all files diff when -S is used and hit is found.\n"
 141
 142 extern int diff_queue_is_empty(void);
 143
 144 #define DIFF_FORMAT_RAW         1
 145 #define DIFF_FORMAT_PATCH       2
 146 #define DIFF_FORMAT_NO_OUTPUT   3
 147 #define DIFF_FORMAT_NAME        4
 148 #define DIFF_FORMAT_NAME_STATUS 5
 149 #define DIFF_FORMAT_DIFFSTAT    6
 150
 151 extern void diff_flush(struct diff_options*);
 152
 153 /* diff-raw status letters */
 154 #define DIFF_STATUS_ADDED               'A'
 155 #define DIFF_STATUS_COPIED              'C'
 156 #define DIFF_STATUS_DELETED             'D'
 157 #define DIFF_STATUS_MODIFIED            'M'
 158 #define DIFF_STATUS_RENAMED             'R'
 159 #define DIFF_STATUS_TYPE_CHANGED        'T'
 160 #define DIFF_STATUS_UNKNOWN             'X'
 161 #define DIFF_STATUS_UNMERGED            'U'
 162
 163 /* these are not diff-raw status letters proper, but used by
 164  * diffcore-filter insn to specify additional restrictions.
 165  */
 166 #define DIFF_STATUS_FILTER_AON          '*'
 167 #define DIFF_STATUS_FILTER_BROKEN       'B'
 168
 169 extern const char *diff_unique_abbrev(const unsigned char *, int);
 170
 171 #endif /* DIFF_H */