godot/drivers/unix/file_access_unix.h

/*************************************************************************/
/*  file_access_unix.h                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
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#ifndef FILE_ACCESS_UNIX_H
#define FILE_ACCESS_UNIX_H

#include "core/io/file_access.h"
#include "core/os/memory.h"

#include <stdio.h>

#if defined(UNIX_ENABLED) || defined(LIBC_FILEIO_ENABLED)

typedef void (*CloseNotificationFunc)(const String &p_file, int p_flags);

class FileAccessUnix : public FileAccess {
	FILE *f = nullptr;
	int flags = 0;
	void check_errors() const;
	mutable Error last_error = OK;
	String save_path;
	String path;
	String path_src;

	static FileAccess *create_libc();

public:
	static CloseNotificationFunc close_notification_func;

	virtual Error _open(const String &p_path, int p_mode_flags); ///< open a file
	virtual void close(); ///< close a file
	virtual bool is_open() const; ///< true when file is open

	virtual String get_path() const; /// returns the path for the current open file
	virtual String get_path_absolute() const; /// returns the absolute path for the current open file

	virtual void seek(uint64_t p_position); ///< seek to a given position
	virtual void seek_end(int64_t p_position = 0); ///< seek from the end of file
	virtual uint64_t get_position() const; ///< get position in the file
	virtual uint64_t get_length() const; ///< get size of the file

	virtual bool eof_reached() const; ///< reading passed EOF

	virtual uint8_t get_8() const; ///< get a byte
	virtual uint64_t get_buffer(uint8_t *p_dst, uint64_t p_length) const;

	virtual Error get_error() const; ///< get last error

	virtual void flush();
	virtual void store_8(uint8_t p_dest); ///< store a byte
	virtual void store_buffer(const uint8_t *p_src, uint64_t p_length); ///< store an array of bytes

	virtual bool file_exists(const String &p_path); ///< return true if a file exists

	virtual uint64_t _get_modified_time(const String &p_file);
	virtual uint32_t _get_unix_permissions(const String &p_file);
	virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions);

	FileAccessUnix() {}
	virtual ~FileAccessUnix();
};

#endif
#endif