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libfat/source/file_allocation_table.h

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Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
/*
file_allocation_table.h
Reading, writing and manipulation of the FAT structure on
a FAT partition
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 _FAT_H
#define _FAT_H
#include "common.h"
#include "partition.h"
#define CLUSTER_EOF_16 0xFFFF
Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
2007-09-01 09:55:38 +02:00
#define CLUSTER_EOF 0x0FFFFFFF
#define CLUSTER_FREE 0x00000000
fix mixed eols
2012-05-20 16:40:21 +02:00
#define CLUSTER_ROOT 0x00000000
Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
2007-09-01 09:55:38 +02:00
#define CLUSTER_FIRST 0x00000002
#define CLUSTER_ERROR 0xFFFFFFFF
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
#define CLUSTERS_PER_FAT12 4085
#define CLUSTERS_PER_FAT16 65525
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
uint32_t _FAT_fat_nextCluster(PARTITION* partition, uint32_t cluster);
uint32_t _FAT_fat_linkFreeCluster(PARTITION* partition, uint32_t cluster);
uint32_t _FAT_fat_linkFreeClusterCleared (PARTITION* partition, uint32_t cluster);
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
bool _FAT_fat_clearLinks (PARTITION* partition, uint32_t cluster);
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
uint32_t _FAT_fat_trimChain (PARTITION* partition, uint32_t startCluster, unsigned int chainLength);
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
uint32_t _FAT_fat_lastCluster (PARTITION* partition, uint32_t cluster);
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
unsigned int _FAT_fat_freeClusterCount (PARTITION* partition);
Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
2007-10-25 14:55:18 +02:00
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
static inline sec_t _FAT_fat_clusterToSector (PARTITION* partition, uint32_t cluster) {
return (cluster >= CLUSTER_FIRST) ?
((cluster - CLUSTER_FIRST) * (sec_t)partition->sectorsPerCluster) + partition->dataStart :
partition->rootDirStart;
Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
2007-09-01 09:55:38 +02:00
}
Moved disc interfaces to appropriate libraries (DLDI to libnds, SD/USB to libogc). Changed read/write functions to use size_t and seek function to use off_t -- will help on 64 bit platforms. Partitions no longer specified by fat1:/, fat2:/, etc. Use "nice" device names. On GBA/NDS the default partition is still fat:/; however on Wii and GC sd:/, usb:/, etc. are used instead. Added fsync and ftruncate functions. Mount and unmount no longer startup/shutdown the device, this is the job of the host app. Mount now accepts a partition start parameter. Used standard types, eg uint32_t instead of u32. Archive bit is set when closing/synchronizing a modified file. Various minor bug fixes.
2008-11-20 06:22:28 +01:00
static inline bool _FAT_fat_isValidCluster (PARTITION* partition, uint32_t cluster) {
Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
2007-09-01 09:55:38 +02:00
return (cluster >= CLUSTER_FIRST) && (cluster <= partition->fat.lastCluster /* This will catch CLUSTER_ERROR */);
Initial import into devkitpro CVS.
2006-07-14 04:42:37 +02:00
}
#endif // _FAT_H
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