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