79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* dosFsFatP.h - DOS file system FAT module header file*/
|
|
|
|
/* Copyright 1998-2001, 2004, 2009-2010 Wind River Systems, Inc. */
|
|
|
|
/*
|
|
modification history
|
|
--------------------
|
|
01i,29apr10,pad Moved extern C statement after include statements.
|
|
01h,05aug09,yjl adapt for 64bit
|
|
01g,21mar04,act changes to support clean bit
|
|
01f,20sep01,jkf SPR#69031, common code for both AE & 5.x.
|
|
01e,29feb00,jkf T3 changes
|
|
01d,31jul99,jkf T2 merge, tidiness & spelling.
|
|
01c,23sep98,vld field <syncEnabled> added to structure MS_FAT_DESC
|
|
01b,20sep98,mjc descriptor structure name changed from DOS_FAT16_DESC
|
|
to MS_FAT_DESC
|
|
01a,23feb98,mjc written, preliminary
|
|
*/
|
|
|
|
#ifndef __INCdosFath
|
|
#define __INCdosFath
|
|
|
|
#include "private/dosFsLibP.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* defines */
|
|
|
|
/* conversions of sector <-> cluster numbers */
|
|
|
|
#define CLUST_TO_SEC( pVolDesc, clustNum ) \
|
|
( ((clustNum) - DOS_MIN_CLUST) * (pVolDesc)->secPerClust + \
|
|
(pVolDesc)->dataStartSec )
|
|
|
|
#define SEC_TO_CLUST( pVolDesc, secNum ) \
|
|
( ((secNum) - (pVolDesc)->dataStartSec) / \
|
|
(pVolDesc)->secPerClust + DOS_MIN_CLUST )
|
|
|
|
/* typedefs */
|
|
|
|
typedef enum fat_rw {FAT_READ, FAT_WRITE_GROUP, FAT_WRITE_CLUST} FAT_RW;
|
|
|
|
/*
|
|
* Should change dosFatDesc to a pointer, and move its activeCopyNum
|
|
* member here, then we could point at a single statically-allocated
|
|
* FatDesc for each kind of FAT (12, 16, 32). Then should probably
|
|
* move the bad/eof values, too.
|
|
*/
|
|
typedef struct
|
|
{
|
|
DOS_FAT_DESC dosFatDesc; /* generic DOS FAT descriptor */
|
|
|
|
SEM_ID allocSem; /* semaphore to guard allocations */
|
|
uint32_t fatStartSec; /* FAT starting sector number */
|
|
uint32_t nFatEnts; /* number of entries in FAT */
|
|
uint32_t fatEntFreeCnt; /* count of free clusters */
|
|
uint32_t dos_fat_avail; /* cluster is available: 0x0000 */
|
|
uint32_t dos_fat_reserv; /* reserved cluster marker: 0xff(f)0 */
|
|
uint32_t dos_fat_bad; /* bad cluster marker: 0xff(f)7 */
|
|
uint32_t dos_fat_eof; /* end-of-file marker: 0xff(f)f */
|
|
uint32_t fatGroupSize; /* size clusters */
|
|
uint32_t groupAllocStart;/* initialize to DOS_MIN_CLUST */
|
|
uint32_t clustAllocStart;/* initialize to DOS_MIN_CLUST */
|
|
BOOL syncEnabled; /* FAT copies mirroring enabling */
|
|
} MS_FAT_DESC;
|
|
|
|
typedef MS_FAT_DESC * MS_FAT_DESC_ID;
|
|
|
|
/* defines */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __INCdosFath */
|