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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;
+struct diff_queue_struct;
+
+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 *fullpath);
+
+typedef void (*add_remove_fn_t)(struct diff_options *options,
+ int addremove, unsigned mode,
+ const unsigned char *sha1,
+ const char *fullpath);
+
+typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
+ struct diff_options *options, 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
+#define DIFF_FORMAT_CUMULATIVE 0x0080
+
+/* 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_OPT_RECURSIVE (1 << 0)
+#define DIFF_OPT_TREE_IN_RECURSIVE (1 << 1)
+#define DIFF_OPT_BINARY (1 << 2)
+#define DIFF_OPT_TEXT (1 << 3)
+#define DIFF_OPT_FULL_INDEX (1 << 4)
+#define DIFF_OPT_SILENT_ON_REMOVE (1 << 5)
+#define DIFF_OPT_FIND_COPIES_HARDER (1 << 6)
+#define DIFF_OPT_FOLLOW_RENAMES (1 << 7)
+#define DIFF_OPT_COLOR_DIFF (1 << 8)
+#define DIFF_OPT_COLOR_DIFF_WORDS (1 << 9)
+#define DIFF_OPT_HAS_CHANGES (1 << 10)
+#define DIFF_OPT_QUIET (1 << 11)
+#define DIFF_OPT_NO_INDEX (1 << 12)
+#define DIFF_OPT_ALLOW_EXTERNAL (1 << 13)
+#define DIFF_OPT_EXIT_WITH_STATUS (1 << 14)
+#define DIFF_OPT_REVERSE_DIFF (1 << 15)
+#define DIFF_OPT_CHECK_FAILED (1 << 16)
+#define DIFF_OPT_RELATIVE_NAME (1 << 17)
+#define DIFF_OPT_IGNORE_SUBMODULES (1 << 18)
+#define DIFF_OPT_TST(opts, flag) ((opts)->flags & DIFF_OPT_##flag)
+#define DIFF_OPT_SET(opts, flag) ((opts)->flags |= DIFF_OPT_##flag)
+#define DIFF_OPT_CLR(opts, flag) ((opts)->flags &= ~DIFF_OPT_##flag)
+
+struct diff_options {
+ const char *filter;
+ const char *orderfile;
+ const char *pickaxe;
+ const char *single_follow;
+ const char *a_prefix, *b_prefix;
+ unsigned flags;
+ int context;
+ int break_opt;
+ int detect_rename;
+ int skip_stat_unmatch;
+ int line_termination;
+ int output_format;
+ int pickaxe_opts;
+ int rename_score;
+ int rename_limit;
+ int warn_on_too_large_rename;
+ int dirstat_percent;
+ int setup;
+ int abbrev;
+ const char *prefix;
+ int prefix_length;
+ const char *stat_sep;
+ long xdl_opts;
+
+ int stat_width;
+ int stat_name_width;
+
+ /* this is set by diffcore for DIFF_FORMAT_PATCH */
+ int found_changes;
+
+ FILE *file;
+ int close_file;
+
+ int nr_paths;
+ const char **paths;
+ int *pathlens;
+ change_fn_t change;
+ add_remove_fn_t add_remove;
+ diff_format_fn_t format_callback;
+ void *format_callback_data;
+};
+
+enum color_diff {
+ DIFF_RESET = 0,
+ DIFF_PLAIN = 1,
+ DIFF_METAINFO = 2,
+ DIFF_FRAGINFO = 3,
+ DIFF_FILE_OLD = 4,
+ DIFF_FILE_NEW = 5,
+ DIFF_COMMIT = 6,
+ DIFF_WHITESPACE = 7,
+};
+const char *diff_get_color(int diff_use_color, enum color_diff ix);
+#define diff_get_color_opt(o, ix) \
+ diff_get_color(DIFF_OPT_TST((o), COLOR_DIFF), ix)
+
+
+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);
+extern int diff_root_tree_sha1(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 *fullpath);
+
+extern void diff_change(struct diff_options *,
+ unsigned mode1, unsigned mode2,
+ const unsigned char *sha1,
+ const unsigned char *sha2,
+ const char *fullpath);
+
+extern void diff_unmerge(struct diff_options *,
+ const char *path,
+ unsigned mode,
+ const unsigned char *sha1);
+
+#define DIFF_SETUP_REVERSE 1
+#define DIFF_SETUP_USE_CACHE 2
+#define DIFF_SETUP_USE_SIZE_CACHE 4
+
+extern int git_diff_basic_config(const char *var, const char *value, void *cb);
+extern int git_diff_ui_config(const char *var, const char *value, void *cb);
+extern int diff_use_color_default;
+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 *);
+
+#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"
+
+extern int diff_queue_is_empty(void);
+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);
+
+/* 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
+extern int run_diff_files(struct rev_info *revs, unsigned int option);
+extern int run_diff_index(struct rev_info *revs, int cached);
+
+extern int do_diff_cache(const unsigned char *, struct diff_options *);
+extern int diff_flush_patch_id(struct diff_options *, unsigned char *);
+
+extern int diff_result_code(struct diff_options *, int);
+
+extern void diff_no_index(struct rev_info *, int, const char **, int, const char *);
+
+#endif /* DIFF_H */
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