original files of m241

2026-07-30 11:19:44 +05:30
parent 170c2b3f3a
commit afc7070c1f
12254 changed files with 7655111 additions and 0 deletions
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+/* 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 */