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- /* io.h - Virtual disk input/output
- Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
- Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
- Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- On Debian systems, the complete text of the GNU General Public License
- can be found in /usr/share/common-licenses/GPL-3 file.
- */
- /* FAT32, VFAT, Atari format support, and various fixes additions May 1998
- * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
- #ifndef _IO_H
- #define _IO_H
- #include <sys/types.h> /* for loff_t */
- loff_t llseek(int fd, loff_t offset, int whence);
- /* lseek() analogue for large offsets. */
- void fs_open(char *path, int rw);
- /* Opens the file system PATH. If RW is zero, the file system is opened
- read-only, otherwise, it is opened read-write. */
- void fs_read(loff_t pos, int size, void *data);
- /* Reads SIZE bytes starting at POS into DATA. Performs all applicable
- changes. */
- int fs_test(loff_t pos, int size);
- /* Returns a non-zero integer if SIZE bytes starting at POS can be read without
- errors. Otherwise, it returns zero. */
- void fs_write(loff_t pos, int size, void *data);
- /* If write_immed is non-zero, SIZE bytes are written from DATA to the disk,
- starting at POS. If write_immed is zero, the change is added to a list in
- memory. */
- int fs_close(int write);
- /* Closes the file system, performs all pending changes if WRITE is non-zero
- and removes the list of changes. Returns a non-zero integer if the file
- system has been changed since the last fs_open, zero otherwise. */
- int fs_changed(void);
- /* Determines whether the file system has changed. See fs_close. */
- extern unsigned device_no;
- /* Major number of device (0 if file) and size (in 512 byte sectors) */
- #endif
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