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