1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/kernelhwsrv/userlibandfileserver/fileserver/sfat32/sl_file.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,772 @@
1.4 +// Copyright (c) 1996-2009 Nokia Corporation and/or its subsidiary(-ies).
1.5 +// All rights reserved.
1.6 +// This component and the accompanying materials are made available
1.7 +// under the terms of the License "Eclipse Public License v1.0"
1.8 +// which accompanies this distribution, and is available
1.9 +// at the URL "http://www.eclipse.org/legal/epl-v10.html".
1.10 +//
1.11 +// Initial Contributors:
1.12 +// Nokia Corporation - initial contribution.
1.13 +//
1.14 +// Contributors:
1.15 +//
1.16 +// Description:
1.17 +// f32\sfat\sl_file.cpp
1.18 +//
1.19 +//
1.20 +
1.21 +#include "sl_std.h"
1.22 +#include "sl_cache.h"
1.23 +#include <e32math.h>
1.24 +
1.25 +const TInt KSeekIndexSize=128; // Cache 128 clusters
1.26 +const TInt KSeekIndexSizeLog2=7;
1.27 +const TInt KFirstClusterNum=2;
1.28 +
1.29 +CFatFileCB::CFatFileCB()
1.30 + {
1.31 +
1.32 + __PRINT1(_L("CFatFileCB created 0x%x"),this);
1.33 + }
1.34 +
1.35 +CFatFileCB::~CFatFileCB()
1.36 + {
1.37 + __PRINT1(_L("CFatFileCB deleted 0x%x"),this);
1.38 +
1.39 + //-- a nasty trick to find out if the CFatFileCB is in consistent state on the moment of destruction.
1.40 + //-- Because of OOM conditions CFatFileCB might not be fully constructed and to be deleted, while FlushAll()
1.41 + //-- implies valid iMount.
1.42 + const CMountCB* pMount = &Mount();
1.43 + if(pMount)
1.44 + {//-- do some finalisation work if CMountCB is valid
1.45 + if (iAtt&KEntryAttModified)
1.46 + TRAP_IGNORE(FlushAllL());
1.47 + }
1.48 +
1.49 + delete[] iSeekIndex;
1.50 + }
1.51 +
1.52 +
1.53 +void CFatFileCB::CreateSeekIndex()
1.54 +//
1.55 +// Create a seek index
1.56 +//
1.57 + {
1.58 +
1.59 + iSeekIndex = new TUint32[KSeekIndexSize];
1.60 + if (iSeekIndex == NULL)
1.61 + return;
1.62 +
1.63 + Mem::FillZ(iSeekIndex, sizeof(TUint32) * KSeekIndexSize);
1.64 +
1.65 + iSeekIndexSize=CalcSeekIndexSize(Size());
1.66 + }
1.67 +
1.68 +TInt CFatFileCB::SeekToPosition(TInt aNewRelCluster,TInt aClusterOffset)
1.69 +//
1.70 +// Use the seek index to set iCurrentPos.iCluster as close as possible to aNewRelCluster
1.71 +// Return aNewRelCluster-aCurrentPos.iCluster
1.72 +//
1.73 + {
1.74 + TInt clusterOffset=aClusterOffset;
1.75 + TInt seekPos=(aNewRelCluster>>iSeekIndexSize)-1;
1.76 + __ASSERT_DEBUG(seekPos<KSeekIndexSize,Fault(EFatFileSeekIndexTooSmall));
1.77 +
1.78 + while(seekPos>=0 && iSeekIndex[seekPos]==0 && clusterOffset!=0)
1.79 + {
1.80 + seekPos--;
1.81 + clusterOffset--;
1.82 + }
1.83 + if (clusterOffset==0) // Counted back to the current cluster
1.84 + return(aClusterOffset);
1.85 + if (seekPos<0)
1.86 + {
1.87 + iCurrentPos.iCluster=iStartCluster;
1.88 + return(aNewRelCluster);
1.89 + }
1.90 +
1.91 + iCurrentPos.iCluster=iSeekIndex[seekPos];
1.92 + return(aNewRelCluster-((seekPos+1)<<iSeekIndexSize));
1.93 + }
1.94 +
1.95 +void CFatFileCB::SetSeekIndexValueL(TInt aRelCluster,TInt aStoredCluster)
1.96 +//
1.97 +// Sets a value in the seekindex
1.98 +//
1.99 + {
1.100 +
1.101 + TInt seekPos=(aRelCluster>>iSeekIndexSize)-1;
1.102 + __ASSERT_DEBUG(seekPos<KSeekIndexSize,Fault(EFatFileSeekIndexTooSmall));
1.103 + __ASSERT_DEBUG(seekPos>=0,Fault(EFatFileSeekIndexTooSmall2));
1.104 + iSeekIndex[seekPos] = aStoredCluster;
1.105 + }
1.106 +
1.107 +TBool CFatFileCB::IsSeekBackwards(TUint aPos)
1.108 +//
1.109 +// Return true if aPos<currentPos
1.110 +//
1.111 + {
1.112 +
1.113 + TUint cluster=iCurrentPos.iCluster<<ClusterSizeLog2();
1.114 + TInt offset=ClusterRelativePos(iCurrentPos.iPos);
1.115 + TUint currentPos=cluster+offset;
1.116 + return(aPos<currentPos);
1.117 + }
1.118 +
1.119 +void CFatFileCB::CheckPosL(TUint aPos)
1.120 +//
1.121 +// Check that the file is positioned correctly.
1.122 +// If aPos<currentPos attempt to guess the new position.
1.123 +//
1.124 + {
1.125 + __PRINT1(_L("CFatFileCB::CheckPosL(%d)"), aPos);
1.126 + if (aPos==iCurrentPos.iPos)
1.127 + return;
1.128 + __ASSERT_DEBUG(aPos <= (TUint)Size(), Fault(EFatFilePosBeyondEnd));
1.129 +
1.130 + if (iFileSizeModified && IsSeekBackwards(aPos))
1.131 + FlushDataL();
1.132 +
1.133 + TUint newRelCluster=aPos>>ClusterSizeLog2();
1.134 + if ( aPos && (aPos==(newRelCluster<<ClusterSizeLog2())) )
1.135 + newRelCluster--;
1.136 + TUint oldRelCluster=iCurrentPos.iPos>>ClusterSizeLog2();
1.137 + if ( iCurrentPos.iPos && (iCurrentPos.iPos==(oldRelCluster<<ClusterSizeLog2())) )
1.138 + oldRelCluster--;
1.139 + TInt clusterOffset=newRelCluster-oldRelCluster;
1.140 + TInt oldCluster=iCurrentPos.iCluster;
1.141 + iCurrentPos.iPos=aPos;
1.142 + if (clusterOffset==0)
1.143 + return;
1.144 + TInt seekOffset=clusterOffset;
1.145 + if (iSeekIndex!=NULL)
1.146 + { // Can alter iCurrentPos.iCluster
1.147 + seekOffset=SeekToPosition(newRelCluster,seekOffset);
1.148 + if (seekOffset==0)
1.149 + return;
1.150 + }
1.151 + if (clusterOffset==-1 && seekOffset!=1)
1.152 + { // Check previous cluster
1.153 + TInt cluster=oldCluster-1;
1.154 + if (FAT().GetNextClusterL(cluster) && cluster==oldCluster)
1.155 + {
1.156 + iCurrentPos.iCluster=oldCluster-1;
1.157 + return;
1.158 + }
1.159 + }
1.160 + if (seekOffset<0)
1.161 + {
1.162 + seekOffset=newRelCluster;
1.163 + iCurrentPos.iCluster=iStartCluster;
1.164 + }
1.165 + while (seekOffset--)
1.166 + {
1.167 + if (!FAT().GetNextClusterL(iCurrentPos.iCluster))
1.168 + {
1.169 + __PRINT(_L("CFatFileCB::CheckPosL() corrupt#1"));
1.170 + User::Leave(KErrCorrupt);
1.171 + }
1.172 + TInt cluster=newRelCluster-seekOffset;
1.173 + if (iSeekIndex!=NULL && cluster && (cluster>>iSeekIndexSize)<<iSeekIndexSize==cluster)
1.174 + SetSeekIndexValueL(cluster,iCurrentPos.iCluster);
1.175 + }
1.176 + }
1.177 +
1.178 +void CFatFileCB::SetL(const TFatDirEntry& aFatDirEntry,TShare aShare,const TEntryPos& aPos)
1.179 +//
1.180 +// Initialize FileCB from entry data
1.181 +//
1.182 + {
1.183 +
1.184 + __PRINT(_L("CFatFileCB::SetL"));
1.185 + SetSize(aFatDirEntry.Size());
1.186 + iCurrentPos.iCluster= FatMount().StartCluster(aFatDirEntry);
1.187 + iStartCluster=iCurrentPos.iCluster;
1.188 + iCurrentPos.iPos=0;
1.189 + iAtt=aFatDirEntry.Attributes();
1.190 + iModified= aFatDirEntry.Time(FatMount().TimeOffset());
1.191 + iShare=aShare;
1.192 + iFileDirPos=aPos;
1.193 +
1.194 + SetMaxSupportedSize(KMaxSupportedFatFileSize);
1.195 + }
1.196 +
1.197 +//-----------------------------------------------------------------------------
1.198 +// from CFileCB::MExtendedFileInterface
1.199 +void CFatFileCB::ReadL(TInt64 aPos,TInt& aLength, TDes8* aDes, const RMessagePtr2& aMessage, TInt aOffset)
1.200 + {
1.201 + __PRINT2(_L("CFatFileCB::ReadL aFilePos=%LU aLength=%d"),aPos,aLength);
1.202 +
1.203 + if((TUint64)aPos > KMaxSupportedFatFileSize-1)
1.204 + User::Leave(KErrNotSupported); //-- max. position in the file is 0xFFFFFFFE
1.205 +
1.206 + FatMount().CheckStateConsistentL();
1.207 +
1.208 + CheckPosL(I64LOW(aPos));
1.209 +
1.210 + const TUint startPos = iCurrentPos.iPos;
1.211 + const TUint curSize = (TUint)Size();
1.212 + const TUint length = (TUint)aLength;
1.213 +
1.214 + if((startPos + length > curSize) || (startPos > startPos + length) )
1.215 + aLength=curSize-startPos;
1.216 +
1.217 + FatMount().ReadFromClusterListL(iCurrentPos,aLength,aDes,aMessage,aOffset);
1.218 + aLength=iCurrentPos.iPos-startPos;
1.219 + }
1.220 +
1.221 +
1.222 +void CFatFileCB::ReadL(TInt aFilePos,TInt& aLength,const TAny* aTrg,const RMessagePtr2& aMessage)
1.223 + {
1.224 + ReadL(TInt64(aFilePos),aLength,(TDes8*) aTrg,aMessage, 0);
1.225 + }
1.226 +
1.227 +//-----------------------------------------------------------------------------
1.228 +// from CFileCB::MExtendedFileInterface
1.229 +void CFatFileCB::WriteL(TInt64 aPos,TInt& aLength,const TDesC8* aSrc,const RMessagePtr2& aMessage, TInt aOffset)
1.230 + {
1.231 + __PRINT2(_L("CFatFileCB::WriteL aFilePos=%LU aLength=%d"),aPos,aLength);
1.232 + // FAT supports 32 bits only for file size
1.233 + TUint64 endPos = aPos + aLength;
1.234 + if(endPos > KMaxSupportedFatFileSize)
1.235 + User::Leave(KErrNotSupported);
1.236 +
1.237 + FatMount().CheckStateConsistentL();
1.238 + FatMount().CheckWritableL();
1.239 + const TUint pos = I64LOW(aPos);
1.240 + CheckPosL(pos);
1.241 +
1.242 + const TUint startCluster = (TUint)iStartCluster;
1.243 + const TUint length = (TUint)aLength;
1.244 +
1.245 + endPos = iCurrentPos.iPos + length;
1.246 + if ((endPos > (TUint)Size()) ||
1.247 + (iCurrentPos.iPos > endPos) ) // Overflow condition
1.248 + DoSetSizeL(iCurrentPos.iPos+length,EFalse);
1.249 +
1.250 + TUint startPos=iCurrentPos.iPos;
1.251 + TInt badcluster=0;
1.252 + TInt goodcluster=0;
1.253 +
1.254 + TRAPD(ret, FatMount().WriteToClusterListL(iCurrentPos,aLength,aSrc,aMessage,aOffset,badcluster, goodcluster));
1.255 +
1.256 + if (ret == KErrCorrupt || ret == KErrDied)
1.257 + {
1.258 + if(startCluster == 0)
1.259 + { //Empty File, revert all the clusters allocated.
1.260 + TInt cluster = iStartCluster;
1.261 + iStartCluster = 0;
1.262 + SetSize(0);
1.263 + FlushAllL();
1.264 +
1.265 + iCurrentPos.iCluster = 0;
1.266 + iCurrentPos.iPos = 0;
1.267 +
1.268 + FAT().FreeClusterListL(cluster);
1.269 + FAT().FlushL();
1.270 + }
1.271 + else
1.272 + { //Calculate the clusters required based on file size, revert extra clusters if allocated.
1.273 + const TUint curSize = (TUint)Size();
1.274 + TUint ClustersNeeded = curSize >> ClusterSizeLog2();
1.275 + if(curSize > (ClustersNeeded << ClusterSizeLog2()))
1.276 + {
1.277 + ClustersNeeded++;
1.278 + }
1.279 +
1.280 + TInt cluster = iStartCluster;
1.281 + while(--ClustersNeeded)
1.282 + {
1.283 + FAT().GetNextClusterL(cluster);
1.284 + }
1.285 +
1.286 + iCurrentPos.iCluster = cluster;
1.287 +
1.288 + if (FAT().GetNextClusterL(cluster))
1.289 + {
1.290 + FAT().FreeClusterListL(cluster);
1.291 + }
1.292 +
1.293 + FAT().WriteFatEntryEofL(iCurrentPos.iCluster);
1.294 + FAT().FlushL();
1.295 + }
1.296 + }
1.297 +
1.298 + User::LeaveIfError(ret);
1.299 +
1.300 + if(badcluster != 0)
1.301 + {
1.302 + if(iStartCluster == badcluster)
1.303 + {
1.304 + iStartCluster = goodcluster;
1.305 + FlushStartClusterL();
1.306 + }
1.307 + else
1.308 + {
1.309 + TInt aCluster = iStartCluster;
1.310 + do
1.311 + {
1.312 + if((TUint)badcluster == FAT().ReadL(aCluster))
1.313 + {
1.314 + FAT().WriteL(aCluster, goodcluster);
1.315 + FAT().FlushL();
1.316 + break;
1.317 + }
1.318 + }
1.319 + while(FAT().GetNextClusterL(aCluster));
1.320 + }
1.321 + }
1.322 + aLength=iCurrentPos.iPos-startPos;
1.323 +
1.324 + if(FatMount().IsRuggedFSys() && pos+(TUint)aLength>(TUint)Size())
1.325 + {
1.326 + WriteFileSizeL(pos+aLength);
1.327 + }
1.328 +
1.329 + }
1.330 +
1.331 +
1.332 +void CFatFileCB::WriteL(TInt aFilePos,TInt& aLength,const TAny* aSrc,const RMessagePtr2& aMessage)
1.333 + {
1.334 + WriteL(TInt64(aFilePos),aLength,(TDesC8*) aSrc,aMessage, 0);
1.335 + }
1.336 +
1.337 +
1.338 +
1.339 +//-----------------------------------------------------------------------------
1.340 +
1.341 +void CFatFileCB::ResizeIndex(TInt aNewMult,TUint aNewSize)
1.342 +//
1.343 +// Resize the seek index to accomodate a larger or smaller filesize
1.344 +// Assumes KSeekIndexSize is a power of 2.
1.345 +//
1.346 + {
1.347 +
1.348 + TInt maxNewIndex=aNewSize>>(ClusterSizeLog2()+aNewMult);
1.349 +
1.350 +
1.351 + TInt index=0;
1.352 + TInt indexEnd=KSeekIndexSize;
1.353 + TInt newValEnd=maxNewIndex;
1.354 +
1.355 + if (iSeekIndexSize<aNewMult)
1.356 + {
1.357 + TInt newVal=index;
1.358 + TInt step=1<<(aNewMult-iSeekIndexSize);
1.359 + index+=step-1;
1.360 + while(index<indexEnd && newVal<newValEnd)
1.361 + {
1.362 + iSeekIndex[newVal] = iSeekIndex[index];
1.363 + newVal++;
1.364 + index+=step;
1.365 + }
1.366 + while(newVal<indexEnd)
1.367 + iSeekIndex[newVal++] = 0;
1.368 + }
1.369 + else
1.370 + {
1.371 + TInt diffSize = iSeekIndexSize-aNewMult;
1.372 + TInt oldVal=(KSeekIndexSize>>diffSize) - 1;
1.373 + TInt newVal=indexEnd-1;
1.374 + TInt skip=(1<<diffSize)-1;
1.375 +
1.376 + if ((iSeekIndexSize - aNewMult) > KSeekIndexSizeLog2)
1.377 + {
1.378 + ClearIndex(0); //-- Invalidate every entry.
1.379 + }
1.380 + else
1.381 + {
1.382 + while(newVal>=index)
1.383 + {
1.384 +
1.385 + iSeekIndex[newVal--] = iSeekIndex[oldVal--];
1.386 +
1.387 +
1.388 + for(TInt i=skip;i>0;i--)
1.389 + {
1.390 + iSeekIndex[newVal--] = 0;
1.391 +
1.392 + }
1.393 + }
1.394 + }
1.395 + }
1.396 + iSeekIndexSize=aNewMult;
1.397 + }
1.398 +
1.399 +
1.400 +/**
1.401 + Zero freed clusters in the index
1.402 +
1.403 + @param aNewSize new size of the file that the index corresponds to.
1.404 + if = 0 all existing index will be zero filled
1.405 +*/
1.406 +void CFatFileCB::ClearIndex(TUint aNewSize)
1.407 + {
1.408 +
1.409 + if (!iSeekIndex)
1.410 + return;
1.411 +
1.412 + if(aNewSize==0)
1.413 + {
1.414 + //-- zero fill all the array
1.415 + Mem::FillZ(iSeekIndex, KSeekIndexSize*sizeof(TUint32));
1.416 + return;
1.417 + }
1.418 +
1.419 + // Files that fill up a cluster exactly do not have a trailing empty
1.420 + // cluster. So the entry for that position must also be invalidated
1.421 + aNewSize--;
1.422 + TInt firstInvalidIndex=aNewSize>>(iSeekIndexSize+ClusterSizeLog2());
1.423 +
1.424 + TInt indexLen=KSeekIndexSize-firstInvalidIndex;
1.425 +
1.426 + Mem::FillZ(iSeekIndex+firstInvalidIndex, indexLen * sizeof(TUint32));
1.427 + }
1.428 +
1.429 +TInt CFatFileCB::CalcSeekIndexSize(TUint aSize)
1.430 +//
1.431 +// Find the nearest power of 2 > aSize
1.432 +//
1.433 + {
1.434 + TInt count = 0;
1.435 + const TUint indexSize=KSeekIndexSize<<ClusterSizeLog2();//KSeekIndexSize=128
1.436 + if (aSize<=indexSize)
1.437 + return(count);
1.438 +
1.439 + while((aSize>>=1)>0)
1.440 + {
1.441 + count++;
1.442 + }
1.443 + return (count - (KSeekIndexSizeLog2 + ClusterSizeLog2()) + 1);
1.444 + }
1.445 +
1.446 +//-----------------------------------------------------------------------------
1.447 +
1.448 +void CFatFileCB::SetSizeL(TInt64 aSize)
1.449 + {
1.450 + __PRINT(_L("CFatFileCB::SetSizeL"));
1.451 +
1.452 + // FAT supports 32 bits only for file size
1.453 + if (I64HIGH(aSize))
1.454 + User::Leave(KErrNotSupported);
1.455 +
1.456 + if(FatMount().IsRuggedFSys())
1.457 + DoSetSizeL(I64LOW(aSize),ETrue);
1.458 + else
1.459 + DoSetSizeL(I64LOW(aSize),EFalse);
1.460 + }
1.461 +
1.462 +
1.463 +void CFatFileCB::SetSizeL(TInt aSize)
1.464 +//
1.465 +// Envelope function around DoSetSizeL to enable aSize to
1.466 +// be written to disk for rugged fat file system
1.467 +//
1.468 + {
1.469 + SetSizeL(TInt64(aSize));
1.470 + }
1.471 +
1.472 +void CFatFileCB::DoSetSizeL(TUint aSize,TBool aIsSizeWrite)
1.473 +//
1.474 +// Extend or truncate the file.
1.475 +// Expects the modified attribute and iSize are set afterwards.
1.476 +// Does not alter iCurrentPos, the current file position.
1.477 +// Writes size of file to disk if aIsSizeWrite set
1.478 +//
1.479 + {
1.480 + __PRINT2(_L("CFatFileCB::DoSetSizeL sz:%d, fileWrite=%d"),aSize ,aIsSizeWrite);
1.481 +
1.482 + FatMount().CheckStateConsistentL();
1.483 + FatMount().CheckWritableL();
1.484 +
1.485 +
1.486 + // Can not change the file size if it is clamped
1.487 + if(Mount().IsFileClamped(MAKE_TINT64(0,iStartCluster)) > 0)
1.488 + User::Leave(KErrInUse);
1.489 +
1.490 + iFileSizeModified=ETrue;
1.491 +
1.492 + TInt newIndexMult=CalcSeekIndexSize(aSize);
1.493 + if (iSeekIndex!=NULL && newIndexMult!=iSeekIndexSize)
1.494 + ResizeIndex(newIndexMult,aSize);
1.495 + if (aSize == 0)
1.496 + {
1.497 + if (Size() != 0)
1.498 + {
1.499 + ClearIndex(0); //-- clear seek index array
1.500 + TInt cluster=iStartCluster;
1.501 + iStartCluster = 0;
1.502 + SetSize(0);
1.503 + FlushAllL();
1.504 + CheckPosL(0);
1.505 + FAT().FreeClusterListL(cluster);
1.506 + FAT().FlushL();
1.507 + }
1.508 + return;
1.509 + }
1.510 + if (aSize<(TUint)Size())
1.511 + {
1.512 + if(aIsSizeWrite) // write file size if decreasing
1.513 + WriteFileSizeL(aSize);
1.514 + CheckPosL(aSize);
1.515 + TInt cluster=iCurrentPos.iCluster;
1.516 + if (FAT().GetNextClusterL(cluster))
1.517 + {
1.518 + FAT().WriteFatEntryEofL(iCurrentPos.iCluster);
1.519 + FAT().FreeClusterListL(cluster);
1.520 + }
1.521 + ClearIndex(aSize);
1.522 + FAT().FlushL();
1.523 + return;
1.524 + }
1.525 +
1.526 + TUint newSize=aSize>>ClusterSizeLog2(); // Number of clusters we now need
1.527 + if (aSize > (newSize<<ClusterSizeLog2()))
1.528 + newSize++; // File size is not an exact multiple of cluster size
1.529 + // Increment the number of clusters required to accomodate tail
1.530 +
1.531 + if (iStartCluster==0)
1.532 + {
1.533 + //-- FAT().FreeClusterHint() will give us a hint of the last free cluster
1.534 + ClearIndex(0); //-- clear seek index array
1.535 + TInt tempStartCluster=FAT().AllocateClusterListL(newSize, FAT().FreeClusterHint());
1.536 + FAT().FlushL();
1.537 + iCurrentPos.iCluster=tempStartCluster;
1.538 + iStartCluster=tempStartCluster;
1.539 + SetSize(aSize);
1.540 + FlushAllL();
1.541 + }
1.542 + else
1.543 + {
1.544 + const TUint curSize = (TUint)Size();
1.545 + TUint oldSize=curSize>>ClusterSizeLog2(); // Number of clusters we had previously
1.546 + if (curSize>(oldSize<<ClusterSizeLog2()))
1.547 + oldSize++;
1.548 +
1.549 + TInt newClusters=newSize-oldSize; // Number of clusters we need to prepare
1.550 + if (newClusters)
1.551 + {
1.552 + TEntryPos currentPos=iCurrentPos;
1.553 + CheckPosL(Size());
1.554 + FAT().ExtendClusterListL(newClusters,iCurrentPos.iCluster);
1.555 + iCurrentPos=currentPos;
1.556 + }
1.557 + FAT().FlushL();
1.558 + if(aIsSizeWrite) // write file size if increasing
1.559 + WriteFileSizeL(aSize);
1.560 + }
1.561 + }
1.562 +
1.563 +//-----------------------------------------------------------------------------
1.564 +/**
1.565 + Set the entry's attributes and modified time.
1.566 +*/
1.567 +void CFatFileCB::SetEntryL(const TTime& aTime,TUint aSetAttMask,TUint aClearAttMask)
1.568 + {
1.569 + __PRINT(_L("CFatFileCB::SetEntryL"));
1.570 +
1.571 + FatMount().CheckStateConsistentL();
1.572 + FatMount().CheckWritableL();
1.573 +
1.574 + TUint setAttMask=aSetAttMask&KEntryAttMaskSupported;
1.575 + if (setAttMask|aClearAttMask)
1.576 + {
1.577 + iAtt|=setAttMask;
1.578 + iAtt&=(~aClearAttMask);
1.579 + }
1.580 + if (aSetAttMask&KEntryAttModified)
1.581 + iModified=aTime;
1.582 + iAtt|=KEntryAttModified;
1.583 + }
1.584 +
1.585 +/**
1.586 + This is a RuggedFAT - specific method. Writes file size to the corresponding field of this
1.587 + file direcrory entry.
1.588 +*/
1.589 +void CFatFileCB::WriteFileSizeL(TUint aSize)
1.590 + {
1.591 + __PRINT(_L("CFatFileCB::WriteFileSizeL"));
1.592 + TEntryPos entryPos=iFileDirPos;
1.593 + entryPos.iPos+=_FOFF(SFatDirEntry,iSize);
1.594 + TPtrC8 size((TUint8*)&aSize,sizeof(TUint));
1.595 +
1.596 + //-- use directory cache when dealing with directories
1.597 + FatMount().DirWriteL(entryPos,size);
1.598 + iFileSizeModified=EFalse;
1.599 + }
1.600 +
1.601 +//-----------------------------------------------------------------------------
1.602 +/**
1.603 + Flush file size, attributes, time etc. to the media.
1.604 + It doesn't matter if whole directory entry is being written of only part of it. Anyway, a single DOS
1.605 + dir. entry always fits into 1 sector.
1.606 +*/
1.607 +void CFatFileCB::FlushDataL()
1.608 + {
1.609 + __PRINT(_L("CFatFileCB::FlushDataL"));
1.610 + FlushAllL();
1.611 + }
1.612 +
1.613 +//-----------------------------------------------------------------------------
1.614 +/**
1.615 + Flush the fide directory entry data: files size, attributes, time etc.
1.616 +*/
1.617 +void CFatFileCB::FlushAllL()
1.618 + {
1.619 + __PRINT(_L("CFatFileCB::FlushAllL()"));
1.620 +
1.621 + if (Mount().IsCurrentMount()==EFalse)
1.622 + User::Leave(KErrDisMounted);
1.623 +
1.624 + FatMount().CheckStateConsistentL();
1.625 + FatMount().CheckWritableL();
1.626 +
1.627 + TFatDirEntry entry;
1.628 + FatMount().ReadDirEntryL(iFileDirPos,entry);
1.629 + __ASSERT_ALWAYS(entry.IsEndOfDirectory()==EFalse,User::Leave(KErrCorrupt));
1.630 + entry.SetAttributes(iAtt&KEntryAttMaskSupported);
1.631 + entry.SetSize(Size());
1.632 + entry.SetTime(iModified, FatMount().TimeOffset());
1.633 + entry.SetStartCluster(iStartCluster);
1.634 +
1.635 + TBool setNotify = FatMount().GetNotifyUser();
1.636 + if(setNotify)
1.637 + {
1.638 + FatMount().SetNotifyOff(); // do not launch a notifier
1.639 + }
1.640 +
1.641 + TRAPD(ret, FatMount().WriteDirEntryL(iFileDirPos,entry));
1.642 +
1.643 + if(setNotify)
1.644 + {
1.645 + FatMount().SetNotifyOn();
1.646 + }
1.647 +
1.648 + User::LeaveIfError(ret);
1.649 + iAtt&=(~KEntryAttModified);
1.650 + iFileSizeModified=EFalse;
1.651 + }
1.652 +
1.653 +//-----------------------------------------------------------------------------
1.654 +
1.655 +/**
1.656 + Rename already opened file.
1.657 + @param aNewName new file name; all trailing dots from the name will be removed
1.658 +*/
1.659 +void CFatFileCB::RenameL(const TDesC& aNewName)
1.660 + {
1.661 + __PRINT2(_L("CFatFileCB::RenameL[0x%x], name:%S"),this, &aNewName);
1.662 +
1.663 + FatMount().CheckStateConsistentL();
1.664 + FatMount().CheckWritableL();
1.665 +
1.666 + const TPtrC fileName = RemoveTrailingDots(aNewName); //-- remove trailing dots from the name
1.667 +
1.668 +
1.669 + FatMount().DoRenameOrReplaceL(*iFileName, fileName, CFatMountCB::EModeRename,iFileDirPos);
1.670 +
1.671 + AllocBufferL(iFileName, fileName);
1.672 +
1.673 + if(!FatMount().IsRuggedFSys())
1.674 + FAT().FlushL();
1.675 + }
1.676 +
1.677 +
1.678 +//***********************************************************
1.679 +//* BlockMap interface
1.680 +//***********************************************************
1.681 +
1.682 +TInt CFatFileCB::BlockMap(SBlockMapInfo& aInfo, TInt64& aStartPos, TInt64 aEndPos)
1.683 +//
1.684 +// Retrieves the block map of a given section of the file, in the FAT file system.
1.685 +//
1.686 + {
1.687 + __PRINT2(_L("CFatFileCB::BlockMap aStartPos=%ld aEndPos=%ld"), aStartPos, aEndPos);
1.688 +
1.689 + if ( I64HIGH(aStartPos) || I64HIGH(aEndPos) )
1.690 + return KErrNotSupported;
1.691 +
1.692 + TUint startPos = I64LOW(aStartPos);
1.693 + TUint endPos = I64LOW(aEndPos);
1.694 +
1.695 + // aEndPos will always be >=0 at this point
1.696 + const TUint length = endPos - startPos;
1.697 +
1.698 + // Store the position of cluster zero in aInfo
1.699 + CFatMountCB& fatMount = FatMount();
1.700 +
1.701 + TInt drvNo=-1;
1.702 + TBusLocalDrive* locDrv;
1.703 + if((fatMount.LocalDrive()->GetLocalDrive(locDrv)==KErrNone) && ((drvNo=GetLocalDriveNumber(locDrv))>=0) && (drvNo<KMaxLocalDrives))
1.704 + aInfo.iLocalDriveNumber=drvNo;
1.705 + else
1.706 + return KErrNotSupported;
1.707 +
1.708 + // Fetch the address of cluster 0
1.709 + aInfo.iStartBlockAddress = fatMount.FAT().DataPositionInBytes(KFirstClusterNum);
1.710 +
1.711 + TRAPD(r, CheckPosL(startPos));
1.712 + if (r != KErrNone)
1.713 + return r;
1.714 +
1.715 + aInfo.iBlockStartOffset = fatMount.ClusterRelativePos(iCurrentPos.iPos);
1.716 + aInfo.iBlockGranularity = 1 << FatMount().ClusterSizeLog2();
1.717 + const TUint myStartPos = iCurrentPos.iPos;
1.718 + if ( myStartPos + length > (TUint)Size())
1.719 + return KErrArgument;
1.720 +
1.721 + TRAP(r, FatMount().BlockMapReadFromClusterListL(iCurrentPos, length, aInfo));
1.722 + if (r != KErrNone)
1.723 + return r;
1.724 +
1.725 + aStartPos = iCurrentPos.iPos;
1.726 + if ((I64LOW(aStartPos) == (TUint)Size()) || ( I64LOW(aStartPos) == (myStartPos + length)))
1.727 + return KErrCompletion;
1.728 + else
1.729 + return KErrNone;
1.730 + }
1.731 +
1.732 +
1.733 +
1.734 +TInt CFatFileCB::GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput)
1.735 + {
1.736 + switch(aInterfaceId)
1.737 + {
1.738 + case EExtendedFileInterface:
1.739 + ((CFileCB::MExtendedFileInterface*&) aInterface) = this;
1.740 + return KErrNone;
1.741 +
1.742 + case EBlockMapInterface:
1.743 + aInterface = (CFileCB::MBlockMapInterface*) this;
1.744 + return KErrNone;
1.745 +
1.746 + case EGetLocalDrive:
1.747 + return FatMount().LocalDrive()->GetLocalDrive((TBusLocalDrive*&) aInterface);
1.748 +
1.749 + default:
1.750 + return CFileCB::GetInterface(aInterfaceId,aInterface,aInput);
1.751 + }
1.752 + }
1.753 +
1.754 +
1.755 +
1.756 +
1.757 +/**
1.758 + Overwrites file's start cluster (iStartCluster) in its directory entry.
1.759 +*/
1.760 +void CFatFileCB::FlushStartClusterL()
1.761 + {
1.762 + __PRINT(_L("CFatFileCB::FlushStartClusterL"));
1.763 +
1.764 + CFatMountCB& mount = FatMount();
1.765 + TFatDirEntry dirEntry;
1.766 +
1.767 + mount.ReadDirEntryL(iFileDirPos, dirEntry); //-- read this file's dir. entry
1.768 + dirEntry.SetStartCluster(iStartCluster); //-- set new start cluster
1.769 + mount.WriteDirEntryL(iFileDirPos, dirEntry);//-- write the entry back
1.770 + }
1.771 +
1.772 +
1.773 +
1.774 +
1.775 +