/*

 * Copyright (C) 2005 Junio C Hamano

 */

#ifndef DIFF_H

#define DIFF_H

#include "hash.h"

#include "pathspec.h"

#include "strbuf.h"

#include "color.h"

struct oidset;

/**

 * The diff API is for programs that compare two sets of files (e.g. two trees,

 * one tree and the index) and present the found difference in various ways.

 * The calling program is responsible for feeding the API pairs of files, one

 * from the "old" set and the corresponding one from "new" set, that are

 * different.

 * The library called through this API is called diffcore, and is responsible

 * for two things.

 *

 * - finding total rewrites (`-B`), renames (`-M`) and copies (`-C`), and

 * changes that touch a string (`-S`), as specified by the caller.

 *

 * - outputting the differences in various formats, as specified by the caller.

 *

 * Calling sequence

 * ----------------

 *

 * - Prepare `struct diff_options` to record the set of diff options, and then

 * call `repo_diff_setup()` to initialize this structure.  This sets up the

 * vanilla default.

 *

 * - Fill in the options structure to specify desired output format, rename

 * detection, etc.  `diff_opt_parse()` can be used to parse options given

 * from the command line in a way consistent with existing git-diff family

 * of programs.

 *

 * - Call `diff_setup_done()`; this inspects the options set up so far for

 * internal consistency and make necessary tweaking to it (e.g. if textual

 * patch output was asked, recursive behaviour is turned on); the callback

 * set_default in diff_options can be used to tweak this more.

 *

 * - As you find different pairs of files, call `diff_change()` to feed

 * modified files, `diff_addremove()` to feed created or deleted files, or

 * `diff_unmerge()` to feed a file whose state is 'unmerged' to the API.

 * These are thin wrappers to a lower-level `diff_queue()` function that is

 * flexible enough to record any of these kinds of changes.

 *

 * - Once you finish feeding the pairs of files, call `diffcore_std()`.

 * This will tell the diffcore library to go ahead and do its work.

 *

 * - Calling `diff_flush()` will produce the output, it will call

 *   `diff_free()` to free any resources, e.g. those allocated in

 *   `diff_opt_parse()`.

 *

 * - Set `.no_free = 1` before calling `diff_flush()` to defer the

 *   freeing of allocated memory in diff_options. This is useful when

 *   `diff_flush()` is being called in a loop, rather than as a

 *   one-off. When setting `.no_free = 1` you must ensure that

 *   `diff_free()` is called at the end, either by flipping the flag

 *   before the last `diff_flush()` call, or by flipping it before

 *   calling `diff_free()` yourself.

 */

struct combine_diff_path;

struct commit;

struct diff_filespec;

struct diff_options;

struct diff_queue_struct;

struct oid_array;

struct option;

struct repository;

struct rev_info;

struct userdiff_driver;

typedef int (*pathchange_fn_t)(struct diff_options *options,

     struct combine_diff_path *path);

typedef void (*change_fn_t)(struct diff_options *options,

     unsigned old_mode, unsigned new_mode,

     const struct object_id *old_oid,

     const struct object_id *new_oid,

     int old_oid_valid, int new_oid_valid,

     const char *fullpath,

     unsigned old_dirty_submodule, unsigned new_dirty_submodule);

typedef void (*add_remove_fn_t)(struct diff_options *options,

        int addremove, unsigned mode,

        const struct object_id *oid,

        int oid_valid,

        const char *fullpath, unsigned dirty_submodule);

typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,

    struct diff_options *options, void *data);

typedef const char *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);

#define DIFF_FORMAT_RAW   0x0001

#define DIFF_FORMAT_DIFFSTAT  0x0002

#define DIFF_FORMAT_NUMSTAT 0x0004

#define DIFF_FORMAT_SUMMARY 0x0008

#define DIFF_FORMAT_PATCH 0x0010

#define DIFF_FORMAT_SHORTSTAT 0x0020

#define DIFF_FORMAT_DIRSTAT 0x0040

/* These override all above */

#define DIFF_FORMAT_NAME  0x0100

#define DIFF_FORMAT_NAME_STATUS 0x0200

#define DIFF_FORMAT_CHECKDIFF 0x0400

/* Same as output_format = 0 but we know that -s flag was given

 * and we should not give default value to output_format.

 */

#define DIFF_FORMAT_NO_OUTPUT 0x0800

#define DIFF_FORMAT_CALLBACK  0x1000

#define DIFF_FLAGS_INIT { 0 }

struct diff_flags {

  /**

   * Tells if tree traversal done by tree-diff should recursively descend

   * into a tree object pair that are different in preimage and postimage set.

   */

  unsigned recursive;

  unsigned tree_in_recursive;

  /*

   * Historically diff_tree_combined() overrides recursive to 1. To

   * suppress this behavior, set the flag below.

   * It has no effect if recursive is already set to 1.

   */

  unsigned no_recursive_diff_tree_combined;

  /* Affects the way how a file that is seemingly binary is treated. */

  unsigned binary;

  unsigned text;

  /**

   * Tells the patch output format not to use abbreviated object names on the

   * "index" lines.

   */

  unsigned full_index;

  /* Affects if diff-files shows removed files. */

  unsigned silent_on_remove;

  /**

   * Tells the diffcore library that the caller is feeding unchanged

   * filepairs to allow copies from unmodified files be detected.

   */

  unsigned find_copies_harder;

  unsigned follow_renames;

  unsigned rename_empty;

  /* Internal; used for optimization to see if there is any change. */

  unsigned has_changes;

  unsigned quick;

  /**

   * Tells diff-files that the input is not tracked files but files in random

   * locations on the filesystem.

   */

  unsigned no_index;

  /**

   * Tells output routine that it is Ok to call user specified patch output

   * routine.  Plumbing disables this to ensure stable output.

   */

  unsigned allow_external;

  /**

   * For communication between the calling program and the options parser;

   * tell the calling program to signal the presence of difference using

   * program exit code.

   */

  unsigned exit_with_status;

  /**

   * Tells the library that the calling program is feeding the filepairs

   * reversed; `one` is two, and `two` is one.

   */

  unsigned reverse_diff;

  unsigned check_failed;

  unsigned relative_name;

  unsigned ignore_submodules;

  unsigned dirstat_cumulative;

  unsigned dirstat_by_file;

  unsigned allow_textconv;

  unsigned textconv_set_via_cmdline;

  unsigned diff_from_contents;

  unsigned dirty_submodules;

  unsigned ignore_untracked_in_submodules;

  unsigned ignore_submodule_set;

  unsigned ignore_dirty_submodules;

  unsigned override_submodule_config;

  unsigned dirstat_by_line;

  unsigned funccontext;

  unsigned default_follow_renames;

  unsigned stat_with_summary;

  unsigned suppress_diff_headers;

  unsigned dual_color_diffed_diffs;

  unsigned suppress_hunk_header_line_count;

};

static inline void diff_flags_or(struct diff_flags *a,

         const struct diff_flags *b)

{

  char *tmp_a = (char *)a;

  const char *tmp_b = (const char *)b;

  for (size_t i = 0; i < sizeof(struct diff_flags); i++)

    tmp_a[i] |= tmp_b[i];

}

Unexecuted instantiation: attr.c:diff_flags_or

Unexecuted instantiation: pretty.c:diff_flags_or

Unexecuted instantiation: read-cache.c:diff_flags_or

Unexecuted instantiation: reflog-walk.c:diff_flags_or

Unexecuted instantiation: files-backend.c:diff_flags_or

Unexecuted instantiation: remote.c:diff_flags_or

Unexecuted instantiation: revision.c:diff_flags_or

Unexecuted instantiation: shallow.c:diff_flags_or

Unexecuted instantiation: submodule.c:diff_flags_or

Unexecuted instantiation: tree-diff.c:diff_flags_or

Unexecuted instantiation: wt-status.c:diff_flags_or

Unexecuted instantiation: bisect.c:diff_flags_or

Unexecuted instantiation: bloom.c:diff_flags_or

Unexecuted instantiation: bundle.c:diff_flags_or

Unexecuted instantiation: combine-diff.c:diff_flags_or

Unexecuted instantiation: commit-reach.c:diff_flags_or

Unexecuted instantiation: commit.c:diff_flags_or

Unexecuted instantiation: diff-merges.c:diff_flags_or

Unexecuted instantiation: diff-lib.c:diff_flags_or

Unexecuted instantiation: diff.c:diff_flags_or

Unexecuted instantiation: diffcore-order.c:diff_flags_or

Unexecuted instantiation: diffcore-pickaxe.c:diff_flags_or

Unexecuted instantiation: diffcore-rename.c:diff_flags_or

Unexecuted instantiation: diffcore-rotate.c:diff_flags_or

Unexecuted instantiation: graph.c:diff_flags_or

Unexecuted instantiation: grep.c:diff_flags_or

Unexecuted instantiation: line-log.c:diff_flags_or

Unexecuted instantiation: list-objects.c:diff_flags_or

Unexecuted instantiation: log-tree.c:diff_flags_or

Unexecuted instantiation: merge-ort.c:diff_flags_or

Unexecuted instantiation: patch-ids.c:diff_flags_or

Unexecuted instantiation: range-diff.c:diff_flags_or

Unexecuted instantiation: sequencer.c:diff_flags_or

Unexecuted instantiation: apply.c:diff_flags_or

Unexecuted instantiation: list-objects-filter.c:diff_flags_or

#define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)

#define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)

#define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)

#define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)

enum diff_words_type {

  DIFF_WORDS_NONE = 0,

  DIFF_WORDS_PORCELAIN,

  DIFF_WORDS_PLAIN,

  DIFF_WORDS_COLOR

};

enum diff_submodule_format {

  DIFF_SUBMODULE_SHORT = 0,

  DIFF_SUBMODULE_LOG,

  DIFF_SUBMODULE_INLINE_DIFF

};

/**

 * the set of options the calling program wants to affect the operation of

 * diffcore library with.

 */

struct diff_options {

  char *orderfile;

  /*

   * "--rotate-to=<file>" would start showing at <file> and when

   * the output reaches the end, wrap around by default.

   * Setting skip_instead_of_rotate to true stops the output at the

   * end, effectively discarding the earlier part of the output

   * before <file>'s diff (this is used to implement the

   * "--skip-to=<file>" option).

   *

   * When rotate_to_strict is set, it is an error if there is no

   * <file> in the diff.  Otherwise, the output starts at the

   * path that is the same as, or first path that sorts after,

   * <file>.  Because it is unreasonable to require the exact

   * match for "git log -p --rotate-to=<file>" (i.e. not all

   * commit would touch that single <file>), "git log" sets it

   * to false.  "git diff" sets it to true to detect an error

   * in the command line option.

   */

  const char *rotate_to;

  int skip_instead_of_rotate;

  int rotate_to_strict;

  /**

   * A constant string (can and typically does contain newlines to look for

   * a block of text, not just a single line) to filter out the filepairs

   * that do not change the number of strings contained in its preimage and

   * postimage of the diff_queue.

   */

  const char *pickaxe;

  unsigned pickaxe_opts;

  /* -I<regex> */

  regex_t **ignore_regex;

  size_t ignore_regex_nr, ignore_regex_alloc;

  const char *single_follow;

  const char *a_prefix, *b_prefix;

  const char *line_prefix;

  /**

   * collection of boolean options that affects the operation, but some do

   * not have anything to do with the diffcore library.

   */

  struct diff_flags flags;

  /* diff-filter bits */

  unsigned int filter, filter_not;

  enum git_colorbool use_color;

  /* Number of context lines to generate in patch output. */

  int context;

  int interhunkcontext;

  /* Affects the way detection logic for complete rewrites, renames and

   * copies.

   */

  int break_opt;

  int detect_rename;

  int irreversible_delete;

  int skip_stat_unmatch;

  int line_termination;

  /* The output format used when `diff_flush()` is run. */

  int output_format;

  /* Affects the way detection logic for complete rewrites, renames and

   * copies.

   */

  int rename_score;

  int rename_limit;

  int needed_rename_limit;

  int degraded_cc_to_c;

  int show_rename_progress;

  int dirstat_permille;

  int setup;

  /* Number of hexdigits to abbreviate raw format output to. */

  int abbrev;

  /* If non-zero, then stop computing after this many changes. */

  int max_changes;

  int ita_invisible_in_index;

/* white-space error highlighting */

#define WSEH_NEW        (1<<16)

#define WSEH_CONTEXT    (1<<17)

#define WSEH_OLD        (1<<18)

  unsigned ws_error_highlight;

  const char *prefix;

  int prefix_length;

  const char *stat_sep;

  int xdl_opts;

  int ignore_driver_algorithm;

  /* see Documentation/diff-options.adoc */

  char **anchors;

  size_t anchors_nr, anchors_alloc;

  int stat_width;

  int stat_name_width;

  int stat_graph_width;

  int stat_count;

  const char *word_regex;

  enum diff_words_type word_diff;

  enum diff_submodule_format submodule_format;

  struct oidset *objfind;

  /* this is set by diffcore for DIFF_FORMAT_PATCH */

  int found_changes;

  /* to support internal diff recursion by --follow hack*/

  int found_follow;

  /*

   * By default, diffcore_std() resolves the statuses for queued diff file

   * pairs by calling diff_resolve_rename_copy(). If status information

   * has already been manually set, this option prevents diffcore_std()

   * from resetting statuses.

   */

  int skip_resolving_statuses;

  /* Callback which allows tweaking the options in diff_setup_done(). */

  void (*set_default)(struct diff_options *);

  FILE *file;

  int close_file;

#define OUTPUT_INDICATOR_NEW 0

#define OUTPUT_INDICATOR_OLD 1

#define OUTPUT_INDICATOR_CONTEXT 2

  char output_indicators[3];

  struct pathspec pathspec;

  pathchange_fn_t pathchange;

  change_fn_t change;

  add_remove_fn_t add_remove;

  void *change_fn_data;

  diff_format_fn_t format_callback;

  void *format_callback_data;

  diff_prefix_fn_t output_prefix;

  void *output_prefix_data;

  int diff_path_counter;

  struct emitted_diff_symbols *emitted_symbols;

  enum {

    COLOR_MOVED_NO = 0,

    COLOR_MOVED_PLAIN = 1,

    COLOR_MOVED_BLOCKS = 2,

    COLOR_MOVED_ZEBRA = 3,

    COLOR_MOVED_ZEBRA_DIM = 4,

  } color_moved;

  #define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA

  #define COLOR_MOVED_MIN_ALNUM_COUNT 20

  /* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */

  #define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)

  #define COLOR_MOVED_WS_ERROR (1<<0)

  unsigned color_moved_ws_handling;

  struct repository *repo;

  struct strmap *additional_path_headers;

  int no_free;

  /*

   * The value '0' is a valid max-depth (for no recursion), and value '-1'

   * also (for unlimited recursion), so the extra "valid" flag is used to

   * determined whether the user specified option --max-depth.

   */

  int max_depth;

  int max_depth_valid;

};

unsigned diff_filter_bit(char status);

void diff_emit_submodule_del(struct diff_options *o, const char *line);

void diff_emit_submodule_add(struct diff_options *o, const char *line);

void diff_emit_submodule_untracked(struct diff_options *o, const char *path);

void diff_emit_submodule_modified(struct diff_options *o, const char *path);

void diff_emit_submodule_header(struct diff_options *o, const char *header);

void diff_emit_submodule_error(struct diff_options *o, const char *err);

void diff_emit_submodule_pipethrough(struct diff_options *o,

             const char *line, int len);

struct diffstat_t {

  int nr;

  int alloc;

  struct diffstat_file {

    char *from_name;

    char *name;

    char *print_name;

    const char *comments;

    unsigned is_unmerged:1;

    unsigned is_binary:1;

    unsigned is_renamed:1;

    unsigned is_interesting:1;

    uintmax_t added, deleted;

  } **files;

};

enum color_diff {

  DIFF_RESET = 0,

  DIFF_CONTEXT = 1,

  DIFF_METAINFO = 2,

  DIFF_FRAGINFO = 3,

  DIFF_FILE_OLD = 4,

  DIFF_FILE_NEW = 5,

  DIFF_COMMIT = 6,

  DIFF_WHITESPACE = 7,

  DIFF_FUNCINFO = 8,

  DIFF_FILE_OLD_MOVED = 9,

  DIFF_FILE_OLD_MOVED_ALT = 10,

  DIFF_FILE_OLD_MOVED_DIM = 11,

  DIFF_FILE_OLD_MOVED_ALT_DIM = 12,

  DIFF_FILE_NEW_MOVED = 13,

  DIFF_FILE_NEW_MOVED_ALT = 14,

  DIFF_FILE_NEW_MOVED_DIM = 15,

  DIFF_FILE_NEW_MOVED_ALT_DIM = 16,

  DIFF_CONTEXT_DIM = 17,

  DIFF_FILE_OLD_DIM = 18,

  DIFF_FILE_NEW_DIM = 19,

  DIFF_CONTEXT_BOLD = 20,

  DIFF_FILE_OLD_BOLD = 21,

  DIFF_FILE_NEW_BOLD = 22,

};

const char *diff_get_color(enum git_colorbool diff_use_color, enum color_diff ix);

#define diff_get_color_opt(o, ix) \

  diff_get_color((o)->use_color, ix)

const char *diff_line_prefix(struct diff_options *);

extern const char mime_boundary_leader[];

struct combine_diff_path *diff_tree_paths(

  const struct object_id *oid,

  const struct object_id **parents_oid, int nparent,

  struct strbuf *base, struct diff_options *opt);

void diff_tree_oid(const struct object_id *old_oid,

       const struct object_id *new_oid,

       const char *base, struct diff_options *opt);

void diff_root_tree_oid(const struct object_id *new_oid, const char *base,

      struct diff_options *opt);

struct combine_diff_path {

  struct combine_diff_path *next;

  char *path;

  unsigned int mode;

  struct object_id oid;

  struct combine_diff_parent {

    char status;

    unsigned int mode;

    struct object_id oid;

    /*

     * This per-parent path is filled only when doing a combined

     * diff with revs.combined_all_paths set, and only if the path

     * differs from the post-image (e.g., a rename or copy).

     * Otherwise it is left NULL.

     */

    char *path;

  } parent[FLEX_ARRAY];

};

struct combine_diff_path *combine_diff_path_new(const char *path,

            size_t path_len,

            unsigned int mode,

            const struct object_id *oid,

            size_t num_parents);

void show_combined_diff(struct combine_diff_path *elem, int num_parent,

      struct rev_info *);

void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, struct rev_info *rev);

void diff_tree_combined_merge(const struct commit *commit, struct rev_info *rev);

void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);

void diff_set_noprefix(struct diff_options *options);

void diff_set_default_prefix(struct diff_options *options);

int diff_can_quit_early(struct diff_options *);

/*

 * Stages changes in the provided diff queue for file additions and deletions.

 * If a file pair gets queued, it is returned.

 */

struct diff_filepair *diff_queue_addremove(struct diff_queue_struct *queue,

             struct diff_options *,

             int addremove, unsigned mode,

             const struct object_id *oid,

             int oid_valid, const char *fullpath,

             unsigned dirty_submodule);

/*

 * Stages changes in the provided diff queue for file modifications.

 * If a file pair gets queued, it is returned.

 */

struct diff_filepair *diff_queue_change(struct diff_queue_struct *queue,

          struct diff_options *,

          unsigned mode1, unsigned mode2,

          const struct object_id *old_oid,

          const struct object_id *new_oid,

          int old_oid_valid, int new_oid_valid,

          const char *fullpath,

          unsigned dirty_submodule1,

          unsigned dirty_submodule2);

void diff_addremove(struct diff_options *,

        int addremove,

        unsigned mode,

        const struct object_id *oid,

        int oid_valid,

        const char *fullpath, unsigned dirty_submodule);

void diff_change(struct diff_options *,

     unsigned mode1, unsigned mode2,

     const struct object_id *old_oid,

     const struct object_id *new_oid,

     int old_oid_valid, int new_oid_valid,

     const char *fullpath,

     unsigned dirty_submodule1, unsigned dirty_submodule2);

void diff_same(struct diff_options *,

         unsigned mode,

         const struct object_id *oid,

         const char *fullpath);

struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);

void compute_diffstat(struct diff_options *options, struct diffstat_t *diffstat,

          struct diff_queue_struct *q);

void free_diffstat_info(struct diffstat_t *diffstat);

#define DIFF_SETUP_REVERSE        1

#define DIFF_SETUP_USE_SIZE_CACHE 4

/*

 * Poor man's alternative to parse-option, to allow both stuck form

 * (--option=value) and separate form (--option value).

 */

int parse_long_opt(const char *opt, const char **argv,

       const char **optarg);

struct config_context;

int git_diff_basic_config(const char *var, const char *value,

        const struct config_context *ctx, void *cb);

int git_diff_heuristic_config(const char *var, const char *value, void *cb);

void init_diff_ui_defaults(void);

int git_diff_ui_config(const char *var, const char *value,

           const struct config_context *ctx, void *cb);

void repo_diff_setup(struct repository *, struct diff_options *);

struct option *add_diff_options(const struct option *, struct diff_options *);

int diff_opt_parse(struct diff_options *, const char **, int, const char *);

void diff_setup_done(struct diff_options *);

/*

 * Returns true if the pathspec can work with --follow mode. If die_on_error is

 * set, die() with a specific error message rather than returning false.

 */

int diff_check_follow_pathspec(struct pathspec *ps, int die_on_error);

int git_config_rename(const char *var, const char *value);

#define DIFF_DETECT_RENAME  1

#define DIFF_DETECT_COPY  2

#define DIFF_PICKAXE_ALL  1

#define DIFF_PICKAXE_REGEX  2

#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */

#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */

#define DIFF_PICKAXE_KIND_OBJFIND 16 /* specific object IDs */

#define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S | \

         DIFF_PICKAXE_KIND_G | \

         DIFF_PICKAXE_KIND_OBJFIND)

#define DIFF_PICKAXE_KINDS_G_REGEX_MASK (DIFF_PICKAXE_KIND_G | \

           DIFF_PICKAXE_REGEX)

#define DIFF_PICKAXE_KINDS_ALL_OBJFIND_MASK (DIFF_PICKAXE_ALL | \

               DIFF_PICKAXE_KIND_OBJFIND)

#define DIFF_PICKAXE_IGNORE_CASE  32

void init_diffstat_widths(struct diff_options *);

void diffcore_std(struct diff_options *);

void diffcore_fix_diff_index(void);

#define COMMON_DIFF_OPTIONS_HELP \

"\ncommon diff options:\n" \

"  -z            output diff-raw with lines terminated with NUL.\n" \

"  -p            output patch format.\n" \

"  -u            synonym for -p.\n" \

"  --patch-with-raw\n" \

"                output both a patch and the diff-raw format.\n" \

"  --stat        show diffstat instead of patch.\n" \

"  --numstat     show numeric diffstat instead of patch.\n" \

"  --patch-with-stat\n" \

"                output a patch and prepend its diffstat.\n" \

"  --name-only   show only names of changed files.\n" \

"  --name-status show names and status of changed files.\n" \

"  --full-index  show full object name on index lines.\n" \

"  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \

"  -R            swap input file pairs.\n" \

"  -B            detect complete rewrites.\n" \

"  -M            detect renames.\n" \

"  -C            detect copies.\n" \

"  --find-copies-harder\n" \

"                try unchanged files as candidate for copy detection.\n" \

"  -l<n>         limit rename attempts up to <n> paths.\n" \

"  -O<file>      reorder diffs according to the <file>.\n" \

"  -S<string>    find filepair whose only one side contains the string.\n" \

"  --pickaxe-all\n" \

"                show all files diff when -S is used and hit is found.\n" \

"  -a  --text    treat all files as text.\n"

int diff_queue_is_empty(struct diff_options *o);

void diff_flush(struct diff_options*);

void diff_free(struct diff_options*);

void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);

/* diff-raw status letters */

#define DIFF_STATUS_ADDED   'A'

#define DIFF_STATUS_COPIED    'C'

#define DIFF_STATUS_DELETED   'D'

#define DIFF_STATUS_MODIFIED    'M'

#define DIFF_STATUS_RENAMED   'R'

#define DIFF_STATUS_TYPE_CHANGED  'T'

#define DIFF_STATUS_UNKNOWN   'X'

#define DIFF_STATUS_UNMERGED    'U'

/* these are not diff-raw status letters proper, but used by

 * diffcore-filter insn to specify additional restrictions.

 */

#define DIFF_STATUS_FILTER_AON    '*'

#define DIFF_STATUS_FILTER_BROKEN 'B'

/*

 * This is different from repo_find_unique_abbrev() in that

 * it stuffs the result with dots for alignment.

 */

const char *diff_aligned_abbrev(const struct object_id *sha1, int);

void diff_get_merge_base(const struct rev_info *revs, struct object_id *mb);

/* do not report anything on removed paths */

#define DIFF_SILENT_ON_REMOVED 01

/* report racily-clean paths as modified */

#define DIFF_RACY_IS_MODIFIED 02

void run_diff_files(struct rev_info *revs, unsigned int option);

#define DIFF_INDEX_CACHED 01

#define DIFF_INDEX_MERGE_BASE 02

void run_diff_index(struct rev_info *revs, unsigned int option);

int do_diff_cache(const struct object_id *, struct diff_options *);

int diff_flush_patch_id(struct diff_options *, struct object_id *, int);

void flush_one_hunk(struct object_id *result, struct git_hash_ctx *ctx);

int diff_result_code(struct rev_info *);

int diff_no_index(struct rev_info *, const struct git_hash_algo *algop,

      int implicit_no_index, int, const char **);

int index_differs_from(struct repository *r, const char *def,

           const struct diff_flags *flags,

           int ita_invisible_in_index);

/*

 * Emit an interdiff of two object ID's to 'diff_options.file' optionally

 * indented by 'indent' spaces.

 */

void show_interdiff(const struct object_id *, const struct object_id *,

        int indent, struct diff_options *);

/*

 * Fill the contents of the filespec "df", respecting any textconv defined by

 * its userdiff driver.  The "driver" parameter must come from a

 * previous call to get_textconv(), and therefore should either be NULL or have

 * textconv enabled.

 *

 * Note that the memory ownership of the resulting buffer depends on whether

 * the driver field is NULL. If it is, then the memory belongs to the filespec

 * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer

 * that should be freed by the caller.

 */

size_t fill_textconv(struct repository *r,

         struct userdiff_driver *driver,

         struct diff_filespec *df,

         char **outbuf);

/*

 * Look up the userdiff driver for the given filespec, and return it if

 * and only if it has textconv enabled (otherwise return NULL). The result

 * can be passed to fill_textconv().

 */

struct userdiff_driver *get_textconv(struct repository *r,

             struct diff_filespec *one);

/*

 * Prepare diff_filespec and convert it using diff textconv API

 * if the textconv driver exists.

 * Return 1 if the conversion succeeds, 0 otherwise.

 */

int textconv_object(struct repository *repo,

        const char *path,

        unsigned mode,

        const struct object_id *oid, int oid_valid,

        char **buf, unsigned long *buf_size);

int parse_rename_score(const char **cp_p);

long parse_algorithm_value(const char *value);

void print_stat_summary(FILE *fp, int files,

      int insertions, int deletions);

void setup_diff_pager(struct diff_options *);

extern int diff_auto_refresh_index;

#endif /* DIFF_H */