usbloadergx/source/libfat/fatfile.h

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/*
fatfile.h
Functions used by the newlib disc stubs to interface with
this library
Copyright (c) 2006 Michael "Chishm" Chisholm
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _FATFILE_H
#define _FATFILE_H
#include <sys/reent.h>
#include <sys/stat.h>
#include "common.h"
#include "partition.h"
#include "directory.h"
#define FILE_MAX_SIZE ((uint32_t)0xFFFFFFFF) // 4GiB - 1B
typedef struct
{
u32 cluster;
sec_t sector;
s32 byte;
} FILE_POSITION;
struct _FILE_STRUCT;
struct _FILE_STRUCT
{
uint32_t filesize;
uint32_t startCluster;
uint32_t currentPosition;
FILE_POSITION rwPosition;
FILE_POSITION appendPosition;
DIR_ENTRY_POSITION dirEntryStart; // Points to the start of the LFN entries of a file, or the alias for no LFN
DIR_ENTRY_POSITION dirEntryEnd; // Always points to the file's alias entry
PARTITION* partition;
struct _FILE_STRUCT* prevOpenFile; // The previous entry in a double-linked list of open files
struct _FILE_STRUCT* nextOpenFile; // The next entry in a double-linked list of open files
bool read;
bool write;
bool append;
bool inUse;
bool modified;
};
typedef struct _FILE_STRUCT FILE_STRUCT;
extern int _FAT_open_r ( struct _reent *r, void *fileStruct, const char *path, int flags, int mode );
extern int _FAT_close_r ( struct _reent *r, int fd );
extern ssize_t _FAT_write_r ( struct _reent *r, int fd, const char *ptr, size_t len );
extern ssize_t _FAT_read_r ( struct _reent *r, int fd, char *ptr, size_t len );
extern off_t _FAT_seek_r ( struct _reent *r, int fd, off_t pos, int dir );
extern int _FAT_fstat_r ( struct _reent *r, int fd, struct stat *st );
extern int _FAT_stat_r ( struct _reent *r, const char *path, struct stat *st );
extern int _FAT_link_r ( struct _reent *r, const char *existing, const char *newLink );
extern int _FAT_unlink_r ( struct _reent *r, const char *name );
extern int _FAT_chdir_r ( struct _reent *r, const char *name );
extern int _FAT_rename_r ( struct _reent *r, const char *oldName, const char *newName );
extern int _FAT_ftruncate_r ( struct _reent *r, int fd, off_t len );
extern int _FAT_fsync_r ( struct _reent *r, int fd );
/*
Synchronizes the file data to disc.
Does no locking of its own -- lock the partition before calling.
Returns 0 on success, an error code on failure.
*/
extern int _FAT_syncToDisc ( FILE_STRUCT* file );
#endif // _FATFILE_H