/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
 * sqfsdiff.h
 *
 * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
 */
#ifndef DIFFTOOL_H
#define DIFFTOOL_H

#include "config.h"
#include "common.h"
#include "fstree.h"

#include <stdlib.h>
#include <getopt.h>
#include <string.h>
#include <errno.h>

#define MAX_WINDOW_SIZE (1024 * 1024 * 4)

typedef struct {
	sqfs_compressor_config_t cfg;
	sqfs_compressor_t *cmp;
	sqfs_super_t super;
	sqfs_file_t *file;
	sqfs_id_table_t *idtbl;
	sqfs_dir_reader_t *dr;
	sqfs_tree_node_t *root;
	sqfs_data_reader_t *data;

	sqfs_compressor_config_t options;
	bool have_options;
} sqfs_state_t;

typedef struct {
	const char *old_path;
	const char *new_path;
	int compare_flags;
	sqfs_state_t sqfs_old;
	sqfs_state_t sqfs_new;
	bool compare_super;
	const char *extract_dir;
} sqfsdiff_t;

enum {
	COMPARE_NO_PERM = 0x01,
	COMPARE_NO_OWNER = 0x02,
	COMPARE_NO_CONTENTS = 0x04,
	COMPARE_TIMESTAMP = 0x08,
	COMPARE_INODE_NUM = 0x10,
	COMPARE_EXTRACT_FILES = 0x20,
};

int compare_dir_entries(sqfsdiff_t *sd, sqfs_tree_node_t *old,
			sqfs_tree_node_t *new);

char *node_path(const sqfs_tree_node_t *n);

int compare_files(sqfsdiff_t *sd, const sqfs_inode_generic_t *old,
		  const sqfs_inode_generic_t *new, const char *path);

int node_compare(sqfsdiff_t *sd, sqfs_tree_node_t *a, sqfs_tree_node_t *b);

int compare_super_blocks(const sqfs_super_t *a, const sqfs_super_t *b);

int extract_files(sqfsdiff_t *sd, const sqfs_inode_generic_t *old,
		  const sqfs_inode_generic_t *new,
		  const char *path);

void process_options(sqfsdiff_t *sd, int argc, char **argv);

#endif /* DIFFTOOL_H */
