1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/kernelhwsrv/userlibandfileserver/fileserver/sfat/sl_file.cpp Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,782 @@
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 +
1.22 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.23 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.24 +//!!
1.25 +//!! WARNING!! DO NOT edit this file !! '\sfat' component is obsolete and is not being used. '\sfat32'replaces it
1.26 +//!!
1.27 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.28 +//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1.29 +
1.30 +
1.31 +#include "sl_std.h"
1.32 +#include "sl_cache.h"
1.33 +#include <e32math.h>
1.34 +
1.35 +const TInt KSeekIndexSize=128; // Cache 128 clusters
1.36 +const TInt KSeekIndexSizeLog2=7;
1.37 +const TInt KFirstClusterNum=2;
1.38 +
1.39 +CFatFileCB::CFatFileCB()
1.40 + {
1.41 +
1.42 + __PRINT1(_L("CFatFileCB created 0x%x"),this);
1.43 + }
1.44 +
1.45 +CFatFileCB::~CFatFileCB()
1.46 + {
1.47 + __PRINT1(_L("CFatFileCB deleted 0x%x"),this);
1.48 +
1.49 + //-- a nasty trick to find out if the CFatFileCB is in consistent state on the moment of destruction.
1.50 + //-- Because of OOM conditions CFatFileCB might not be fully constructed and to be deleted, while FlushAll()
1.51 + //-- implies valid iMount.
1.52 + const CMountCB* pMount = &Mount();
1.53 + if(pMount)
1.54 + {//-- do some finalisation work if CMountCB is valid
1.55 + if (iAtt&KEntryAttModified)
1.56 + TRAP_IGNORE(FlushAllL());
1.57 + }
1.58 +
1.59 + delete[] iSeekIndex;
1.60 + }
1.61 +
1.62 +
1.63 +void CFatFileCB::CreateSeekIndex()
1.64 +//
1.65 +// Create a seek index
1.66 +//
1.67 + {
1.68 +
1.69 + iSeekIndex = new TUint32[KSeekIndexSize];
1.70 + if (iSeekIndex == NULL)
1.71 + return;
1.72 +
1.73 + Mem::FillZ(iSeekIndex, sizeof(TUint32) * KSeekIndexSize);
1.74 +
1.75 + iSeekIndexSize=CalcSeekIndexSize(Size());
1.76 + }
1.77 +
1.78 +TInt CFatFileCB::SeekToPosition(TInt aNewRelCluster,TInt aClusterOffset)
1.79 +//
1.80 +// Use the seek index to set iCurrentPos.iCluster as close as possible to aNewRelCluster
1.81 +// Return aNewRelCluster-aCurrentPos.iCluster
1.82 +//
1.83 + {
1.84 + TInt clusterOffset=aClusterOffset;
1.85 + TInt seekPos=(aNewRelCluster>>iSeekIndexSize)-1;
1.86 + __ASSERT_DEBUG(seekPos<KSeekIndexSize,Fault(EFatFileSeekIndexTooSmall));
1.87 +
1.88 + while(seekPos>=0 && iSeekIndex[seekPos]==0 && clusterOffset!=0)
1.89 + {
1.90 + seekPos--;
1.91 + clusterOffset--;
1.92 + }
1.93 + if (clusterOffset==0) // Counted back to the current cluster
1.94 + return(aClusterOffset);
1.95 + if (seekPos<0)
1.96 + {
1.97 + iCurrentPos.iCluster=iStartCluster;
1.98 + return(aNewRelCluster);
1.99 + }
1.100 +
1.101 + iCurrentPos.iCluster=iSeekIndex[seekPos];
1.102 + return(aNewRelCluster-((seekPos+1)<<iSeekIndexSize));
1.103 + }
1.104 +
1.105 +void CFatFileCB::SetSeekIndexValueL(TInt aRelCluster,TInt aStoredCluster)
1.106 +//
1.107 +// Sets a value in the seekindex
1.108 +//
1.109 + {
1.110 +
1.111 + TInt seekPos=(aRelCluster>>iSeekIndexSize)-1;
1.112 + __ASSERT_DEBUG(seekPos<KSeekIndexSize,Fault(EFatFileSeekIndexTooSmall));
1.113 + __ASSERT_DEBUG(seekPos>=0,Fault(EFatFileSeekIndexTooSmall2));
1.114 + iSeekIndex[seekPos] = aStoredCluster;
1.115 + }
1.116 +
1.117 +TBool CFatFileCB::IsSeekBackwards(TUint aPos)
1.118 +//
1.119 +// Return true if aPos<currentPos
1.120 +//
1.121 + {
1.122 +
1.123 + TUint cluster=iCurrentPos.iCluster<<ClusterSizeLog2();
1.124 + TInt offset=ClusterRelativePos(iCurrentPos.iPos);
1.125 + TUint currentPos=cluster+offset;
1.126 + return(aPos<currentPos);
1.127 + }
1.128 +
1.129 +void CFatFileCB::CheckPosL(TUint aPos)
1.130 +//
1.131 +// Check that the file is positioned correctly.
1.132 +// If aPos<currentPos attempt to guess the new position.
1.133 +//
1.134 + {
1.135 + __PRINT1(_L("CFatFileCB::CheckPosL(%d)"), aPos);
1.136 + if (aPos==iCurrentPos.iPos)
1.137 + return;
1.138 + __ASSERT_DEBUG(aPos <= (TUint)Size(), Fault(EFatFilePosBeyondEnd));
1.139 +
1.140 + if (iFileSizeModified && IsSeekBackwards(aPos))
1.141 + FlushDataL();
1.142 +
1.143 + TUint newRelCluster=aPos>>ClusterSizeLog2();
1.144 + if ( aPos && (aPos==(newRelCluster<<ClusterSizeLog2())) )
1.145 + newRelCluster--;
1.146 + TUint oldRelCluster=iCurrentPos.iPos>>ClusterSizeLog2();
1.147 + if ( iCurrentPos.iPos && (iCurrentPos.iPos==(oldRelCluster<<ClusterSizeLog2())) )
1.148 + oldRelCluster--;
1.149 + TInt clusterOffset=newRelCluster-oldRelCluster;
1.150 + TInt oldCluster=iCurrentPos.iCluster;
1.151 + iCurrentPos.iPos=aPos;
1.152 + if (clusterOffset==0)
1.153 + return;
1.154 + TInt seekOffset=clusterOffset;
1.155 + if (iSeekIndex!=NULL)
1.156 + { // Can alter iCurrentPos.iCluster
1.157 + seekOffset=SeekToPosition(newRelCluster,seekOffset);
1.158 + if (seekOffset==0)
1.159 + return;
1.160 + }
1.161 + if (clusterOffset==-1 && seekOffset!=1)
1.162 + { // Check previous cluster
1.163 + TInt cluster=oldCluster-1;
1.164 + if (FAT().GetNextClusterL(cluster) && cluster==oldCluster)
1.165 + {
1.166 + iCurrentPos.iCluster=oldCluster-1;
1.167 + return;
1.168 + }
1.169 + }
1.170 + if (seekOffset<0)
1.171 + {
1.172 + seekOffset=newRelCluster;
1.173 + iCurrentPos.iCluster=iStartCluster;
1.174 + }
1.175 + while (seekOffset--)
1.176 + {
1.177 + if (!FAT().GetNextClusterL(iCurrentPos.iCluster))
1.178 + {
1.179 + __PRINT(_L("CFatFileCB::CheckPosL() corrupt#1"));
1.180 + User::Leave(KErrCorrupt);
1.181 + }
1.182 + TInt cluster=newRelCluster-seekOffset;
1.183 + if (iSeekIndex!=NULL && cluster && (cluster>>iSeekIndexSize)<<iSeekIndexSize==cluster)
1.184 + SetSeekIndexValueL(cluster,iCurrentPos.iCluster);
1.185 + }
1.186 + }
1.187 +
1.188 +void CFatFileCB::SetL(const TFatDirEntry& aFatDirEntry,TShare aShare,const TEntryPos& aPos)
1.189 +//
1.190 +// Initialize FileCB from entry data
1.191 +//
1.192 + {
1.193 +
1.194 + __PRINT(_L("CFatFileCB::SetL"));
1.195 + SetSize(aFatDirEntry.Size());
1.196 + iCurrentPos.iCluster= FatMount().StartCluster(aFatDirEntry);
1.197 + iStartCluster=iCurrentPos.iCluster;
1.198 + iCurrentPos.iPos=0;
1.199 + iAtt=aFatDirEntry.Attributes();
1.200 + iModified= aFatDirEntry.Time(FatMount().TimeOffset());
1.201 + iShare=aShare;
1.202 + iFileDirPos=aPos;
1.203 +
1.204 + SetMaxSupportedSize(KMaxSupportedFatFileSize);
1.205 + }
1.206 +
1.207 +//-----------------------------------------------------------------------------
1.208 +// from CFileCB::MExtendedFileInterface
1.209 +void CFatFileCB::ReadL(TInt64 aPos,TInt& aLength, TDes8* aDes, const RMessagePtr2& aMessage, TInt aOffset)
1.210 + {
1.211 + __PRINT2(_L("CFatFileCB::ReadL aFilePos=%LU aLength=%d"),aPos,aLength);
1.212 +
1.213 + if((TUint64)aPos > KMaxSupportedFatFileSize-1)
1.214 + User::Leave(KErrNotSupported); //-- max. position in the file is 0xFFFFFFFE
1.215 +
1.216 + FatMount().CheckStateConsistentL();
1.217 +
1.218 + CheckPosL(I64LOW(aPos));
1.219 +
1.220 + const TUint startPos = iCurrentPos.iPos;
1.221 + const TUint curSize = (TUint)Size();
1.222 + const TUint length = (TUint)aLength;
1.223 +
1.224 + if((startPos + length > curSize) || (startPos > startPos + length) )
1.225 + aLength=curSize-startPos;
1.226 +
1.227 + FatMount().ReadFromClusterListL(iCurrentPos,aLength,aDes,aMessage,aOffset);
1.228 + aLength=iCurrentPos.iPos-startPos;
1.229 + }
1.230 +
1.231 +
1.232 +void CFatFileCB::ReadL(TInt aFilePos,TInt& aLength,const TAny* aTrg,const RMessagePtr2& aMessage)
1.233 + {
1.234 + ReadL(TInt64(aFilePos),aLength,(TDes8*) aTrg,aMessage, 0);
1.235 + }
1.236 +
1.237 +//-----------------------------------------------------------------------------
1.238 +// from CFileCB::MExtendedFileInterface
1.239 +void CFatFileCB::WriteL(TInt64 aPos,TInt& aLength,const TDesC8* aSrc,const RMessagePtr2& aMessage, TInt aOffset)
1.240 + {
1.241 + __PRINT2(_L("CFatFileCB::WriteL aFilePos=%LU aLength=%d"),aPos,aLength);
1.242 + // FAT supports 32 bits only for file size
1.243 + TUint64 endPos = aPos + aLength;
1.244 + if(endPos > KMaxSupportedFatFileSize)
1.245 + User::Leave(KErrNotSupported);
1.246 +
1.247 + FatMount().CheckStateConsistentL();
1.248 + FatMount().CheckWritableL();
1.249 + const TUint pos = I64LOW(aPos);
1.250 + CheckPosL(pos);
1.251 +
1.252 + const TUint startCluster = (TUint)iStartCluster;
1.253 + const TUint length = (TUint)aLength;
1.254 +
1.255 + endPos = iCurrentPos.iPos + length;
1.256 + if ((endPos > (TUint)Size()) ||
1.257 + (iCurrentPos.iPos > endPos) ) // Overflow condition
1.258 + DoSetSizeL(iCurrentPos.iPos+length,EFalse);
1.259 +
1.260 + TUint startPos=iCurrentPos.iPos;
1.261 + TInt badcluster=0;
1.262 + TInt goodcluster=0;
1.263 +
1.264 + TRAPD(ret, FatMount().WriteToClusterListL(iCurrentPos,aLength,aSrc,aMessage,aOffset,badcluster, goodcluster));
1.265 +
1.266 + if (ret == KErrCorrupt || ret == KErrDied)
1.267 + {
1.268 + if(startCluster == 0)
1.269 + { //Empty File, revert all the clusters allocated.
1.270 + TInt cluster = iStartCluster;
1.271 + iStartCluster = 0;
1.272 + SetSize(0);
1.273 + FlushAllL();
1.274 +
1.275 + iCurrentPos.iCluster = 0;
1.276 + iCurrentPos.iPos = 0;
1.277 +
1.278 + FAT().FreeClusterListL(cluster);
1.279 + FAT().FlushL();
1.280 + }
1.281 + else
1.282 + { //Calculate the clusters required based on file size, revert extra clusters if allocated.
1.283 + const TUint curSize = (TUint)Size();
1.284 + TUint ClustersNeeded = curSize >> ClusterSizeLog2();
1.285 + if(curSize > (ClustersNeeded << ClusterSizeLog2()))
1.286 + {
1.287 + ClustersNeeded++;
1.288 + }
1.289 +
1.290 + TInt cluster = iStartCluster;
1.291 + while(--ClustersNeeded)
1.292 + {
1.293 + FAT().GetNextClusterL(cluster);
1.294 + }
1.295 +
1.296 + iCurrentPos.iCluster = cluster;
1.297 +
1.298 + if (FAT().GetNextClusterL(cluster))
1.299 + {
1.300 + FAT().FreeClusterListL(cluster);
1.301 + }
1.302 +
1.303 + FAT().WriteFatEntryEofL(iCurrentPos.iCluster);
1.304 + FAT().FlushL();
1.305 + }
1.306 + }
1.307 +
1.308 + User::LeaveIfError(ret);
1.309 +
1.310 + if(badcluster != 0)
1.311 + {
1.312 + if(iStartCluster == badcluster)
1.313 + {
1.314 + iStartCluster = goodcluster;
1.315 + FlushStartClusterL();
1.316 + }
1.317 + else
1.318 + {
1.319 + TInt aCluster = iStartCluster;
1.320 + do
1.321 + {
1.322 + if((TUint)badcluster == FAT().ReadL(aCluster))
1.323 + {
1.324 + FAT().WriteL(aCluster, goodcluster);
1.325 + FAT().FlushL();
1.326 + break;
1.327 + }
1.328 + }
1.329 + while(FAT().GetNextClusterL(aCluster));
1.330 + }
1.331 + }
1.332 + aLength=iCurrentPos.iPos-startPos;
1.333 +
1.334 + if(FatMount().IsRuggedFSys() && pos+(TUint)aLength>(TUint)Size())
1.335 + {
1.336 + WriteFileSizeL(pos+aLength);
1.337 + }
1.338 +
1.339 + }
1.340 +
1.341 +
1.342 +void CFatFileCB::WriteL(TInt aFilePos,TInt& aLength,const TAny* aSrc,const RMessagePtr2& aMessage)
1.343 + {
1.344 + WriteL(TInt64(aFilePos),aLength,(TDesC8*) aSrc,aMessage, 0);
1.345 + }
1.346 +
1.347 +
1.348 +
1.349 +//-----------------------------------------------------------------------------
1.350 +
1.351 +void CFatFileCB::ResizeIndex(TInt aNewMult,TUint aNewSize)
1.352 +//
1.353 +// Resize the seek index to accomodate a larger or smaller filesize
1.354 +// Assumes KSeekIndexSize is a power of 2.
1.355 +//
1.356 + {
1.357 +
1.358 + TInt maxNewIndex=aNewSize>>(ClusterSizeLog2()+aNewMult);
1.359 +
1.360 +
1.361 + TInt index=0;
1.362 + TInt indexEnd=KSeekIndexSize;
1.363 + TInt newValEnd=maxNewIndex;
1.364 +
1.365 + if (iSeekIndexSize<aNewMult)
1.366 + {
1.367 + TInt newVal=index;
1.368 + TInt step=1<<(aNewMult-iSeekIndexSize);
1.369 + index+=step-1;
1.370 + while(index<indexEnd && newVal<newValEnd)
1.371 + {
1.372 + iSeekIndex[newVal] = iSeekIndex[index];
1.373 + newVal++;
1.374 + index+=step;
1.375 + }
1.376 + while(newVal<indexEnd)
1.377 + iSeekIndex[newVal++] = 0;
1.378 + }
1.379 + else
1.380 + {
1.381 + TInt diffSize = iSeekIndexSize-aNewMult;
1.382 + TInt oldVal=(KSeekIndexSize>>diffSize) - 1;
1.383 + TInt newVal=indexEnd-1;
1.384 + TInt skip=(1<<diffSize)-1;
1.385 +
1.386 + if ((iSeekIndexSize - aNewMult) > KSeekIndexSizeLog2)
1.387 + {
1.388 + ClearIndex(0); //-- Invalidate every entry.
1.389 + }
1.390 + else
1.391 + {
1.392 + while(newVal>=index)
1.393 + {
1.394 +
1.395 + iSeekIndex[newVal--] = iSeekIndex[oldVal--];
1.396 +
1.397 +
1.398 + for(TInt i=skip;i>0;i--)
1.399 + {
1.400 + iSeekIndex[newVal--] = 0;
1.401 +
1.402 + }
1.403 + }
1.404 + }
1.405 + }
1.406 + iSeekIndexSize=aNewMult;
1.407 + }
1.408 +
1.409 +
1.410 +/**
1.411 + Zero freed clusters in the index
1.412 +
1.413 + @param aNewSize new size of the file that the index corresponds to.
1.414 + if = 0 all existing index will be zero filled
1.415 +*/
1.416 +void CFatFileCB::ClearIndex(TUint aNewSize)
1.417 + {
1.418 +
1.419 + if (!iSeekIndex)
1.420 + return;
1.421 +
1.422 + if(aNewSize==0)
1.423 + {
1.424 + //-- zero fill all the array
1.425 + Mem::FillZ(iSeekIndex, KSeekIndexSize*sizeof(TUint32));
1.426 + return;
1.427 + }
1.428 +
1.429 + // Files that fill up a cluster exactly do not have a trailing empty
1.430 + // cluster. So the entry for that position must also be invalidated
1.431 + aNewSize--;
1.432 + TInt firstInvalidIndex=aNewSize>>(iSeekIndexSize+ClusterSizeLog2());
1.433 +
1.434 + TInt indexLen=KSeekIndexSize-firstInvalidIndex;
1.435 +
1.436 + Mem::FillZ(iSeekIndex+firstInvalidIndex, indexLen * sizeof(TUint32));
1.437 + }
1.438 +
1.439 +TInt CFatFileCB::CalcSeekIndexSize(TUint aSize)
1.440 +//
1.441 +// Find the nearest power of 2 > aSize
1.442 +//
1.443 + {
1.444 + TInt count = 0;
1.445 + const TUint indexSize=KSeekIndexSize<<ClusterSizeLog2();//KSeekIndexSize=128
1.446 + if (aSize<=indexSize)
1.447 + return(count);
1.448 +
1.449 + while((aSize>>=1)>0)
1.450 + {
1.451 + count++;
1.452 + }
1.453 + return (count - (KSeekIndexSizeLog2 + ClusterSizeLog2()) + 1);
1.454 + }
1.455 +
1.456 +//-----------------------------------------------------------------------------
1.457 +
1.458 +void CFatFileCB::SetSizeL(TInt64 aSize)
1.459 + {
1.460 + __PRINT(_L("CFatFileCB::SetSizeL"));
1.461 +
1.462 + // FAT supports 32 bits only for file size
1.463 + if (I64HIGH(aSize))
1.464 + User::Leave(KErrNotSupported);
1.465 +
1.466 + if(FatMount().IsRuggedFSys())
1.467 + DoSetSizeL(I64LOW(aSize),ETrue);
1.468 + else
1.469 + DoSetSizeL(I64LOW(aSize),EFalse);
1.470 + }
1.471 +
1.472 +
1.473 +void CFatFileCB::SetSizeL(TInt aSize)
1.474 +//
1.475 +// Envelope function around DoSetSizeL to enable aSize to
1.476 +// be written to disk for rugged fat file system
1.477 +//
1.478 + {
1.479 + SetSizeL(TInt64(aSize));
1.480 + }
1.481 +
1.482 +void CFatFileCB::DoSetSizeL(TUint aSize,TBool aIsSizeWrite)
1.483 +//
1.484 +// Extend or truncate the file.
1.485 +// Expects the modified attribute and iSize are set afterwards.
1.486 +// Does not alter iCurrentPos, the current file position.
1.487 +// Writes size of file to disk if aIsSizeWrite set
1.488 +//
1.489 + {
1.490 + __PRINT2(_L("CFatFileCB::DoSetSizeL sz:%d, fileWrite=%d"),aSize ,aIsSizeWrite);
1.491 +
1.492 + FatMount().CheckStateConsistentL();
1.493 + FatMount().CheckWritableL();
1.494 +
1.495 +
1.496 + // Can not change the file size if it is clamped
1.497 + if(Mount().IsFileClamped(MAKE_TINT64(0,iStartCluster)) > 0)
1.498 + User::Leave(KErrInUse);
1.499 +
1.500 + iFileSizeModified=ETrue;
1.501 +
1.502 + TInt newIndexMult=CalcSeekIndexSize(aSize);
1.503 + if (iSeekIndex!=NULL && newIndexMult!=iSeekIndexSize)
1.504 + ResizeIndex(newIndexMult,aSize);
1.505 + if (aSize == 0)
1.506 + {
1.507 + if (Size() != 0)
1.508 + {
1.509 + ClearIndex(0); //-- clear seek index array
1.510 + TInt cluster=iStartCluster;
1.511 + iStartCluster = 0;
1.512 + SetSize(0);
1.513 + FlushAllL();
1.514 + CheckPosL(0);
1.515 + FAT().FreeClusterListL(cluster);
1.516 + FAT().FlushL();
1.517 + }
1.518 + return;
1.519 + }
1.520 + if (aSize<(TUint)Size())
1.521 + {
1.522 + if(aIsSizeWrite) // write file size if decreasing
1.523 + WriteFileSizeL(aSize);
1.524 + CheckPosL(aSize);
1.525 + TInt cluster=iCurrentPos.iCluster;
1.526 + if (FAT().GetNextClusterL(cluster))
1.527 + {
1.528 + FAT().WriteFatEntryEofL(iCurrentPos.iCluster);
1.529 + FAT().FreeClusterListL(cluster);
1.530 + }
1.531 + ClearIndex(aSize);
1.532 + FAT().FlushL();
1.533 + return;
1.534 + }
1.535 +
1.536 + TUint newSize=aSize>>ClusterSizeLog2(); // Number of clusters we now need
1.537 + if (aSize > (newSize<<ClusterSizeLog2()))
1.538 + newSize++; // File size is not an exact multiple of cluster size
1.539 + // Increment the number of clusters required to accomodate tail
1.540 +
1.541 + if (iStartCluster==0)
1.542 + {
1.543 + //-- FAT().FreeClusterHint() will give us a hint of the last free cluster
1.544 + ClearIndex(0); //-- clear seek index array
1.545 + TInt tempStartCluster=FAT().AllocateClusterListL(newSize, FAT().FreeClusterHint());
1.546 + FAT().FlushL();
1.547 + iCurrentPos.iCluster=tempStartCluster;
1.548 + iStartCluster=tempStartCluster;
1.549 + SetSize(aSize);
1.550 + FlushAllL();
1.551 + }
1.552 + else
1.553 + {
1.554 + const TUint curSize = (TUint)Size();
1.555 + TUint oldSize=curSize>>ClusterSizeLog2(); // Number of clusters we had previously
1.556 + if (curSize>(oldSize<<ClusterSizeLog2()))
1.557 + oldSize++;
1.558 +
1.559 + TInt newClusters=newSize-oldSize; // Number of clusters we need to prepare
1.560 + if (newClusters)
1.561 + {
1.562 + TEntryPos currentPos=iCurrentPos;
1.563 + CheckPosL(Size());
1.564 + FAT().ExtendClusterListL(newClusters,iCurrentPos.iCluster);
1.565 + iCurrentPos=currentPos;
1.566 + }
1.567 + FAT().FlushL();
1.568 + if(aIsSizeWrite) // write file size if increasing
1.569 + WriteFileSizeL(aSize);
1.570 + }
1.571 + }
1.572 +
1.573 +//-----------------------------------------------------------------------------
1.574 +/**
1.575 + Set the entry's attributes and modified time.
1.576 +*/
1.577 +void CFatFileCB::SetEntryL(const TTime& aTime,TUint aSetAttMask,TUint aClearAttMask)
1.578 + {
1.579 + __PRINT(_L("CFatFileCB::SetEntryL"));
1.580 +
1.581 + FatMount().CheckStateConsistentL();
1.582 + FatMount().CheckWritableL();
1.583 +
1.584 + TUint setAttMask=aSetAttMask&KEntryAttMaskSupported;
1.585 + if (setAttMask|aClearAttMask)
1.586 + {
1.587 + iAtt|=setAttMask;
1.588 + iAtt&=(~aClearAttMask);
1.589 + }
1.590 + if (aSetAttMask&KEntryAttModified)
1.591 + iModified=aTime;
1.592 + iAtt|=KEntryAttModified;
1.593 + }
1.594 +
1.595 +/**
1.596 + This is a RuggedFAT - specific method. Writes file size to the corresponding field of this
1.597 + file direcrory entry.
1.598 +*/
1.599 +void CFatFileCB::WriteFileSizeL(TUint aSize)
1.600 + {
1.601 + __PRINT(_L("CFatFileCB::WriteFileSizeL"));
1.602 + TEntryPos entryPos=iFileDirPos;
1.603 + entryPos.iPos+=_FOFF(SFatDirEntry,iSize);
1.604 + TPtrC8 size((TUint8*)&aSize,sizeof(TUint));
1.605 +
1.606 + //-- use directory cache when dealing with directories
1.607 + FatMount().DirWriteL(entryPos,size);
1.608 + iFileSizeModified=EFalse;
1.609 + }
1.610 +
1.611 +//-----------------------------------------------------------------------------
1.612 +/**
1.613 + Flush file size, attributes, time etc. to the media.
1.614 + It doesn't matter if whole directory entry is being written of only part of it. Anyway, a single DOS
1.615 + dir. entry always fits into 1 sector.
1.616 +*/
1.617 +void CFatFileCB::FlushDataL()
1.618 + {
1.619 + __PRINT(_L("CFatFileCB::FlushDataL"));
1.620 + FlushAllL();
1.621 + }
1.622 +
1.623 +//-----------------------------------------------------------------------------
1.624 +/**
1.625 + Flush the fide directory entry data: files size, attributes, time etc.
1.626 +*/
1.627 +void CFatFileCB::FlushAllL()
1.628 + {
1.629 + __PRINT(_L("CFatFileCB::FlushAllL()"));
1.630 +
1.631 + if (Mount().IsCurrentMount()==EFalse)
1.632 + User::Leave(KErrDisMounted);
1.633 +
1.634 + FatMount().CheckStateConsistentL();
1.635 + FatMount().CheckWritableL();
1.636 +
1.637 + TFatDirEntry entry;
1.638 + FatMount().ReadDirEntryL(iFileDirPos,entry);
1.639 + __ASSERT_ALWAYS(entry.IsEndOfDirectory()==EFalse,User::Leave(KErrCorrupt));
1.640 + entry.SetAttributes(iAtt&KEntryAttMaskSupported);
1.641 + entry.SetSize(Size());
1.642 + entry.SetTime(iModified, FatMount().TimeOffset());
1.643 + entry.SetStartCluster(iStartCluster);
1.644 +
1.645 + TBool setNotify = FatMount().GetNotifyUser();
1.646 + if(setNotify)
1.647 + {
1.648 + FatMount().SetNotifyOff(); // do not launch a notifier
1.649 + }
1.650 +
1.651 + TRAPD(ret, FatMount().WriteDirEntryL(iFileDirPos,entry));
1.652 +
1.653 + if(setNotify)
1.654 + {
1.655 + FatMount().SetNotifyOn();
1.656 + }
1.657 +
1.658 + User::LeaveIfError(ret);
1.659 + iAtt&=(~KEntryAttModified);
1.660 + iFileSizeModified=EFalse;
1.661 + }
1.662 +
1.663 +//-----------------------------------------------------------------------------
1.664 +
1.665 +/**
1.666 + Rename already opened file.
1.667 + @param aNewName new file name; all trailing dots from the name will be removed
1.668 +*/
1.669 +void CFatFileCB::RenameL(const TDesC& aNewName)
1.670 + {
1.671 + __PRINT2(_L("CFatFileCB::RenameL[0x%x], name:%S"),this, &aNewName);
1.672 +
1.673 + FatMount().CheckStateConsistentL();
1.674 + FatMount().CheckWritableL();
1.675 +
1.676 + const TPtrC fileName = RemoveTrailingDots(aNewName); //-- remove trailing dots from the name
1.677 +
1.678 +
1.679 + FatMount().DoRenameOrReplaceL(*iFileName, fileName, CFatMountCB::EModeRename,iFileDirPos);
1.680 +
1.681 + AllocBufferL(iFileName, fileName);
1.682 +
1.683 + if(!FatMount().IsRuggedFSys())
1.684 + FAT().FlushL();
1.685 + }
1.686 +
1.687 +
1.688 +//***********************************************************
1.689 +//* BlockMap interface
1.690 +//***********************************************************
1.691 +
1.692 +TInt CFatFileCB::BlockMap(SBlockMapInfo& aInfo, TInt64& aStartPos, TInt64 aEndPos)
1.693 +//
1.694 +// Retrieves the block map of a given section of the file, in the FAT file system.
1.695 +//
1.696 + {
1.697 + __PRINT2(_L("CFatFileCB::BlockMap aStartPos=%ld aEndPos=%ld"), aStartPos, aEndPos);
1.698 +
1.699 + if ( I64HIGH(aStartPos) || I64HIGH(aEndPos) )
1.700 + return KErrNotSupported;
1.701 +
1.702 + TUint startPos = I64LOW(aStartPos);
1.703 + TUint endPos = I64LOW(aEndPos);
1.704 +
1.705 + // aEndPos will always be >=0 at this point
1.706 + const TUint length = endPos - startPos;
1.707 +
1.708 + // Store the position of cluster zero in aInfo
1.709 + CFatMountCB& fatMount = FatMount();
1.710 +
1.711 + TInt drvNo=-1;
1.712 + TBusLocalDrive* locDrv;
1.713 + if((fatMount.LocalDrive()->GetLocalDrive(locDrv)==KErrNone) && ((drvNo=GetLocalDriveNumber(locDrv))>=0) && (drvNo<KMaxLocalDrives))
1.714 + aInfo.iLocalDriveNumber=drvNo;
1.715 + else
1.716 + return KErrNotSupported;
1.717 +
1.718 + // Fetch the address of cluster 0
1.719 + aInfo.iStartBlockAddress = fatMount.FAT().DataPositionInBytes(KFirstClusterNum);
1.720 +
1.721 + TRAPD(r, CheckPosL(startPos));
1.722 + if (r != KErrNone)
1.723 + return r;
1.724 +
1.725 + aInfo.iBlockStartOffset = fatMount.ClusterRelativePos(iCurrentPos.iPos);
1.726 + aInfo.iBlockGranularity = 1 << FatMount().ClusterSizeLog2();
1.727 + const TUint myStartPos = iCurrentPos.iPos;
1.728 + if ( myStartPos + length > (TUint)Size())
1.729 + return KErrArgument;
1.730 +
1.731 + TRAP(r, FatMount().BlockMapReadFromClusterListL(iCurrentPos, length, aInfo));
1.732 + if (r != KErrNone)
1.733 + return r;
1.734 +
1.735 + aStartPos = iCurrentPos.iPos;
1.736 + if ((I64LOW(aStartPos) == (TUint)Size()) || ( I64LOW(aStartPos) == (myStartPos + length)))
1.737 + return KErrCompletion;
1.738 + else
1.739 + return KErrNone;
1.740 + }
1.741 +
1.742 +
1.743 +
1.744 +TInt CFatFileCB::GetInterface(TInt aInterfaceId,TAny*& aInterface,TAny* aInput)
1.745 + {
1.746 + switch(aInterfaceId)
1.747 + {
1.748 + case EExtendedFileInterface:
1.749 + ((CFileCB::MExtendedFileInterface*&) aInterface) = this;
1.750 + return KErrNone;
1.751 +
1.752 + case EBlockMapInterface:
1.753 + aInterface = (CFileCB::MBlockMapInterface*) this;
1.754 + return KErrNone;
1.755 +
1.756 + case EGetLocalDrive:
1.757 + return FatMount().LocalDrive()->GetLocalDrive((TBusLocalDrive*&) aInterface);
1.758 +
1.759 + default:
1.760 + return CFileCB::GetInterface(aInterfaceId,aInterface,aInput);
1.761 + }
1.762 + }
1.763 +
1.764 +
1.765 +
1.766 +
1.767 +/**
1.768 + Overwrites file's start cluster (iStartCluster) in its directory entry.
1.769 +*/
1.770 +void CFatFileCB::FlushStartClusterL()
1.771 + {
1.772 + __PRINT(_L("CFatFileCB::FlushStartClusterL"));
1.773 +
1.774 + CFatMountCB& mount = FatMount();
1.775 + TFatDirEntry dirEntry;
1.776 +
1.777 + mount.ReadDirEntryL(iFileDirPos, dirEntry); //-- read this file's dir. entry
1.778 + dirEntry.SetStartCluster(iStartCluster); //-- set new start cluster
1.779 + mount.WriteDirEntryL(iFileDirPos, dirEntry);//-- write the entry back
1.780 + }
1.781 +
1.782 +
1.783 +
1.784 +
1.785 +