|
1 // Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of the License "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 #ifndef SL_BPB1_H |
|
17 #define SL_BPB1_H |
|
18 |
|
19 #include <f32fsys.h> |
|
20 #include <f32ver.h> |
|
21 #include <f32dbg.h> |
|
22 #include <e32svr.h> |
|
23 |
|
24 #pragma warning (disable:4103) // : used #pragma pack to change alignment |
|
25 |
|
26 static const TInt KFatDirNameSize=11; |
|
27 static const TInt KFatDirReservedSize=10; |
|
28 static const TInt KVolumeLabelSize=11; |
|
29 static const TInt KFileSysTypeSize=8; |
|
30 static const TInt KVendorIdSize=8; |
|
31 static const TInt KVFatEntryAttribute=0x0F; |
|
32 static const TInt KBootSectorSignature=0xAA55; |
|
33 |
|
34 class TFatDirEntry; |
|
35 enum TFault |
|
36 { |
|
37 EVFatNoLongName, |
|
38 EFatChkDskFailed, |
|
39 EFatBadParameter, |
|
40 EFatCacheBadRead, |
|
41 EFatCacheNotFatSector, |
|
42 EFatBadLocalDrive, |
|
43 EFatBadBootSectorParameter, |
|
44 EFatBadDirEntryParameter, |
|
45 EFatAddClusterNotLastInList, |
|
46 EFatBadEntryValue, |
|
47 EFatBadClusterValue, |
|
48 EFatBadStdFormatName, |
|
49 EFatBadDosFormatName, |
|
50 EFatCorrupt, |
|
51 EFatChkDskBitListOverFlow, |
|
52 EFatChkDskIndexOverFlow, |
|
53 EFatChkDskIllegalClusterNumber, |
|
54 EFatChkDskClusterAlreadyInUse, |
|
55 EFatChkDskBadCluster, |
|
56 EFatChkDskInvalidEntrySize, |
|
57 EFatDesTooBig, |
|
58 EFatFilePosBeyondEnd, |
|
59 EFatFileSeekIndexTooSmall, |
|
60 EFatFileSeekIndexTooSmall2, |
|
61 EFatDataAllocBadSeg, |
|
62 EFatFileSystemBadMemory, |
|
63 EFatFileSystemCreate1, |
|
64 EFatFileSystemCreate2, |
|
65 EFatFileSystemCreate3, |
|
66 ECacheAllocatorSetMax, |
|
67 EFatLruCacheBadGranularity, |
|
68 EFatFixedCacheBadGranularity, |
|
69 EFatFixedCacheBadCall, |
|
70 EFatRawReadTooBig, |
|
71 EFatRawWriteTooBig, |
|
72 EWinsBadRamDriveRead, |
|
73 EWinsBadRamDriveWrite, |
|
74 EFatReadUidFailed, |
|
75 ELruCacheFlushNotSupported |
|
76 }; |
|
77 |
|
78 struct SFatDirEntry |
|
79 { |
|
80 TUint8 iName[KFatDirNameSize]; |
|
81 TUint8 iAttributes; |
|
82 TUint8 iReserved[KFatDirReservedSize]; |
|
83 TUint16 iTime; |
|
84 TUint16 iDate; |
|
85 TUint16 iStartCluster; |
|
86 TUint32 iSize; |
|
87 }; |
|
88 #define pDir ((SFatDirEntry*)&iData[0]) |
|
89 |
|
90 // |
|
91 typedef TBuf8<KFatDirNameSize> TShortName; |
|
92 // |
|
93 const TInt KSizeOfFatBootSector=62; |
|
94 const TInt KSizeOfFatDirEntry=32; |
|
95 class TFatBootSector |
|
96 { |
|
97 public: |
|
98 inline const TPtrC8 VendorId() const; |
|
99 inline TInt BytesPerSector() const{return iBytesPerSector;} |
|
100 inline TInt SectorsPerCluster() const{return iSectorsPerCluster;} |
|
101 inline TInt ReservedSectors() const {return iReservedSectors;}; |
|
102 inline TInt NumberOfFats() const {return iNumberOfFats;} |
|
103 inline TInt RootDirEntries() const{return iRootDirEntries;} |
|
104 inline TInt TotalSectors() const{return iTotalSectors;} |
|
105 inline TUint8 MediaDescriptor() const {return iMediaDescriptor;} |
|
106 inline TInt FatSectors() const {return iFatSectors;} |
|
107 inline TInt SectorsPerTrack() const {return iSectorsPerTrack;} |
|
108 inline TInt NumberOfHeads() const{return iNumberOfHeads;} |
|
109 inline TInt HiddenSectors() const {return iHiddenSectors;} |
|
110 inline TInt HugeSectors() const{return iHugeSectors;} |
|
111 inline TInt PhysicalDriveNumber() const; |
|
112 inline TInt ExtendedBootSignature() const; |
|
113 inline TUint32 UniqueID() const; |
|
114 inline const TPtrC8 VolumeLabel() const; |
|
115 inline const TPtrC8 FileSysType() const {return TPtrC8(iFileSysType,KFileSysTypeSize);} |
|
116 inline TInt BootSectorSignature() const; |
|
117 inline void SetJumpInstruction(); |
|
118 inline void SetVendorID(const TDesC8& aDes); |
|
119 inline void SetBytesPerSector(TInt aBytesPerSector); |
|
120 inline void SetSectorsPerCluster(TInt aSectorsPerCluster); |
|
121 inline void SetReservedSectors(TInt aReservedSectors); |
|
122 inline void SetNumberOfFats(TInt aNumberOfFats); |
|
123 inline void SetRootDirEntries(TInt aRootDirEntries); |
|
124 inline void SetTotalSectors(TInt aTotalSectors); |
|
125 inline void SetMediaDescriptor(TUint8 aMediaDescriptor); |
|
126 inline void SetFatSectors(TInt aFatSectors); |
|
127 inline void SetSectorsPerTrack(TInt aSectorsPerTrack); |
|
128 inline void SetNumberOfHeads(TInt aNumberOfHeads); |
|
129 inline void SetHiddenSectors(TUint32 aHiddenSectors); |
|
130 inline void SetHugeSectors(TUint32 aTotalSectors); |
|
131 inline void SetPhysicalDriveNumber(TInt aPhysicalDriveNumber); |
|
132 inline void SetReservedByte(TUint8 aReservedByte); |
|
133 inline void SetExtendedBootSignature(TInt anExtendedBootSignature); |
|
134 inline void SetUniqueID(TUint32 anUniqueID); |
|
135 inline void SetVolumeLabel(const TDesC8& aDes); |
|
136 inline void SetFileSysType(const TDesC8& aDes); |
|
137 |
|
138 public: |
|
139 inline TBool Is16BitFat() {return(FileSysType()==_L8("FAT16 "));} |
|
140 TInt FirstFatSectorPos() |
|
141 { |
|
142 return(ReservedSectors()*BytesPerSector()); |
|
143 } |
|
144 inline TInt RootDirStartSector(); |
|
145 inline TInt FirstFreeSector(); |
|
146 public: |
|
147 TUint8 iJumpInstruction[3]; ///< Jump instruction used for bootable volumes |
|
148 TUint8 iVendorId[KVendorIdSize]; ///< Vendor ID of the file system that formatted the volume |
|
149 TUint16 iBytesPerSector; ///< Bytes per sector |
|
150 TUint8 iSectorsPerCluster; ///< Sectors per cluster ratio |
|
151 TUint16 iReservedSectors; ///< Number of reserved sectors on the volume |
|
152 TUint8 iNumberOfFats; ///< Number of Fats on the volume |
|
153 TUint16 iRootDirEntries; ///< Number of entries allowed in the root directory, specific to Fat12/16, zero for FAT32 |
|
154 TUint16 iTotalSectors; ///< Total sectors on the volume, zero for FAT32 |
|
155 TUint8 iMediaDescriptor; ///< Media descriptor |
|
156 TUint16 iFatSectors; ///< Sectors used for the Fat table, zero for FAT32 |
|
157 TUint16 iSectorsPerTrack; ///< Sectors per track |
|
158 TUint16 iNumberOfHeads; ///< Number of heads |
|
159 TUint32 iHiddenSectors; ///< Number of hidden sectors in the volume |
|
160 TUint32 iHugeSectors; ///< Total sectors in the volume, Used if totalSectors > 65535 |
|
161 TUint32 iFatSectors32; ///< Start of additional elements @ offset 36 for FAT32, Sectors in Fat table for 32 bit volume |
|
162 TUint16 iFATFlags; ///< Fat flags |
|
163 TUint16 iVersionNumber; ///< Version number of the file system |
|
164 TUint32 iRootClusterNum; ///< Cluster number of the root directory |
|
165 TUint16 iFSInfoSectorNum; ///< Sector number containing the FSIInfo structure |
|
166 TUint16 iBkBootRecSector; ///< Backup boot sector |
|
167 TUint8 iReserved2[12]; ///< Reserved space, End of Fat32 Only parameters section |
|
168 TUint8 iPhysicalDriveNumber; ///< Physical drive number, not used in Symbian OS |
|
169 TUint8 iReserved; ///< Reserved byte |
|
170 TUint8 iExtendedBootSignature; ///< Extended boot signiture |
|
171 TUint32 iUniqueID; ///< Unique volume ID |
|
172 TUint8 iVolumeLabel[KVolumeLabelSize]; ///< The volume's label |
|
173 TUint8 iFileSysType[KFileSysTypeSize]; ///< File system type |
|
174 }; |
|
175 |
|
176 void Fault(TAny* aTestStep,TFault anError); |
|
177 GLREF_C TBool IsPowerOfTwo(TInt aNum); |
|
178 GLREF_C TInt Log2(TInt aNum); |
|
179 GLREF_C TTime DosTimeToTTime(TInt aDosTime,TInt aDosDate); |
|
180 GLREF_C TInt DosTimeFromTTime(const TTime& aTime); |
|
181 GLREF_C TInt DosDateFromTTime(const TTime& aTime); |
|
182 |
|
183 class TFatDirEntry |
|
184 { |
|
185 public: |
|
186 const TPtrC8 Name() const |
|
187 {return TPtrC8((TUint8*)&(pDir->iName),11); |
|
188 } |
|
189 TInt Attributes() const |
|
190 { |
|
191 return pDir->iAttributes; |
|
192 } |
|
193 inline TTime Time() const; |
|
194 TInt StartCluster() const |
|
195 { |
|
196 return pDir->iStartCluster; |
|
197 } |
|
198 inline TUint32 Size() const; |
|
199 TBool IsErased() const |
|
200 { |
|
201 return (TBool)(iData[0]==0xe5); |
|
202 } |
|
203 inline TBool IsCurrentDirectory() const; |
|
204 inline TBool IsParentDirectory() const; |
|
205 TBool IsEndOfDirectory() const |
|
206 { |
|
207 return (TBool)(iData[0]==0x00); |
|
208 } |
|
209 TBool IsGarbage() const; |
|
210 inline void SetName(const TDesC8& aDes); |
|
211 inline void SetAttributes(TInt anAtt); |
|
212 inline void SetTime(const TTime& aTime); |
|
213 void SetStartCluster(TInt aStartCluster) |
|
214 { |
|
215 __ASSERT_DEBUG(!(aStartCluster&~KMaxTUint16),Fault( this,EFatBadDirEntryParameter)); |
|
216 pDir->iStartCluster=(TUint16)aStartCluster; |
|
217 } |
|
218 inline void SetSize(TUint32 aFilesize); |
|
219 inline void SetErased(); |
|
220 inline void SetCurrentDirectory(); |
|
221 inline void SetParentDirectory(); |
|
222 inline void SetEndOfDirectory(); |
|
223 inline void ZeroReserved(); |
|
224 public: |
|
225 void InitializeRootEntry(); |
|
226 void InitializeAsVFat(TUint8 aCheckSum); |
|
227 void SetVFatEntry(const TDesC& aName,TInt aRemainderLen); |
|
228 void ReadVFatEntry(TDes16& aVBuf); |
|
229 inline TBool IsLongNameStart() const; |
|
230 TBool IsVFatEntry() const |
|
231 { |
|
232 return (TBool)(Attributes()==0x0F && IsEndOfDirectory()==EFalse); |
|
233 } |
|
234 inline TInt NumFollowing() const; |
|
235 public: |
|
236 TUint8 iData[KSizeOfFatDirEntry]; |
|
237 }; |
|
238 |
|
239 #endif // SL_BPB1_H |