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/*
* Copyright (C) 2005 Junio C Hamano
*/
#ifndef DIFF_H
#define DIFF_H

#include "tree-walk.h"

struct rev_info;
struct diff_options;

typedef void (*change_fn_t)(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *base, const char *path);

typedef void (*add_remove_fn_t)(struct diff_options *options,
int addremove, unsigned mode,
const unsigned char *sha1,
const char *base, const char *path);

struct diff_options {
const char *filter;
const char *orderfile;
const char *pickaxe;
unsigned recursive:1,
with_raw:1,
with_stat:1,
tree_in_recursive:1,
binary:1,
full_index:1,
silent_on_remove:1,
find_copies_harder:1,
summary:1,
color_diff:1;
int context;
int break_opt;
int detect_rename;
int line_termination;
int output_format;
int pickaxe_opts;
int rename_score;
int reverse_diff;
int rename_limit;
int setup;
int abbrev;
const char *stat_sep;

int nr_paths;
const char **paths;
int *pathlens;
change_fn_t change;
add_remove_fn_t add_remove;
};

extern const char mime_boundary_leader[];

extern void diff_tree_setup_paths(const char **paths, struct diff_options *);
extern void diff_tree_release_paths(struct diff_options *);
extern int diff_tree(struct tree_desc *t1, struct tree_desc *t2,
const char *base, struct diff_options *opt);
extern int diff_tree_sha1(const unsigned char *old, const unsigned char *new,
const char *base, struct diff_options *opt);

struct combine_diff_path {
struct combine_diff_path *next;
int len;
char *path;
unsigned int mode;
unsigned char sha1[20];
struct combine_diff_parent {
char status;
unsigned int mode;
unsigned char sha1[20];
} parent[FLEX_ARRAY];
};
#define combine_diff_path_size(n, l) \
(sizeof(struct combine_diff_path) + \
sizeof(struct combine_diff_parent) * (n) + (l) + 1)

extern void show_combined_diff(struct combine_diff_path *elem, int num_parent,
int dense, struct rev_info *);

extern void diff_tree_combined(const unsigned char *sha1, const unsigned char parent[][20], int num_parent, int dense, struct rev_info *rev);

extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);

extern void diff_addremove(struct diff_options *,
int addremove,
unsigned mode,
const unsigned char *sha1,
const char *base,
const char *path);

extern void diff_change(struct diff_options *,
unsigned mode1, unsigned mode2,
const unsigned char *sha1,
const unsigned char *sha2,
const char *base, const char *path);

extern void diff_unmerge(struct diff_options *,
const char *path);

extern int diff_scoreopt_parse(const char *opt);

#define DIFF_SETUP_REVERSE 1
#define DIFF_SETUP_USE_CACHE 2
#define DIFF_SETUP_USE_SIZE_CACHE 4

extern int git_diff_config(const char *var, const char *value);
extern void diff_setup(struct diff_options *);
extern int diff_opt_parse(struct diff_options *, const char **, int);
extern int diff_setup_done(struct diff_options *);

#define DIFF_DETECT_RENAME 1
#define DIFF_DETECT_COPY 2

#define DIFF_PICKAXE_ALL 1
#define DIFF_PICKAXE_REGEX 2

extern void diffcore_std(struct diff_options *);

extern void diffcore_std_no_resolve(struct diff_options *);

#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" \
" --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"

extern int diff_queue_is_empty(void);

#define DIFF_FORMAT_RAW 1
#define DIFF_FORMAT_PATCH 2
#define DIFF_FORMAT_NO_OUTPUT 3
#define DIFF_FORMAT_NAME 4
#define DIFF_FORMAT_NAME_STATUS 5
#define DIFF_FORMAT_DIFFSTAT 6
#define DIFF_FORMAT_CHECKDIFF 7

extern void diff_flush(struct diff_options*);

/* 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'

extern const char *diff_unique_abbrev(const unsigned char *, int);

extern int run_diff_files(struct rev_info *revs, int silent_on_removed);

extern int run_diff_index(struct rev_info *revs, int cached);

#endif /* DIFF_H */
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