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