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New release from Jason

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svn path=/trunk/; revision=90
This commit is contained in:
Rex Jolliff 1998-11-07 20:30:33 +00:00
parent a998ae77b0
commit bc9bf59740
1 changed files with 21 additions and 12 deletions
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33
reactos/drivers/fs/vfat/iface.c
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@ -11,6 +11,7 @@
Now works with long filenames that span over a sector boundary
28-10-1998 Reads entire FAT into memory
VFatReadSector modified to read in more than one sector at a time
7-11-1998 Fixed bug that assumed that directory data could be fragmented
*/
@ -58,20 +59,20 @@ ULONG Fat16GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
ULONG FATeis;
PUSHORT Block;
Block = ExAllocatePool(NonPagedPool,1024);
Block = ExAllocatePool(NonPagedPool,BLOCKSIZE);
FATsector=CurrentCluster/(512/sizeof(USHORT));
FATeis=CurrentCluster-(FATsector*256);
// VFATReadSector(DeviceExt->StorageDevice,DeviceExt->FATStart+FATsector,
// Block);
// VFATReadSectors(DeviceExt->StorageDevice,DeviceExt->FATStart+FATsector, 1,
// (UCHAR *)Block);
memcpy(Block,&DeviceExt->FAT, BLOCKSIZE);
memcpy(Block,DeviceExt->FAT+FATsector*BLOCKSIZE, BLOCKSIZE);
CurrentCluster = Block[FATeis];
if (CurrentCluster >= 0xfff8 || CurrentCluster <= 0xffff)
if (CurrentCluster >= 0xfff8 && CurrentCluster <= 0xffff)
{
CurrentCluster = 0;
}
@ -94,10 +95,10 @@ ULONG Fat12GetNextCluster(PDEVICE_EXTENSION DeviceExt, ULONG CurrentCluster)
FATsector = (CurrentCluster * 12) / (512 * 8);
// VFATReadSector(DeviceExt->StorageDevice,DeviceExt->FATStart
// +FATsector,CBlock);
// VFATReadSectors(DeviceExt->StorageDevice,DeviceExt->FATStart
// +FATsector,1,CBlock);
memcpy(CBlock,&DeviceExt->FAT, BLOCKSIZE);
memcpy(CBlock,DeviceExt->FAT+FATsector*BLOCKSIZE, BLOCKSIZE);
FATOffset = (CurrentCluster * 12) % (512 * 8);
@ -402,8 +403,16 @@ NTSTATUS FindFile(PDEVICE_EXTENSION DeviceExt, PFCB Fcb,
}
}
}
if (Parent == NULL)
}
/* It seems that directory sectors cannot be fragmented and therefore,
they only have a first cluster, but the one's after it are marked
with 0xffff. This theory is still not 100% certain, so the following
lines are commented and not removed */
StartingSector++;
/* if (Parent == NULL)
{
StartingSector++;
}
@ -416,7 +425,7 @@ NTSTATUS FindFile(PDEVICE_EXTENSION DeviceExt, PFCB Fcb,
return(STATUS_UNSUCCESSFUL);
}
StartingSector = ClusterToSector(DeviceExt,NextCluster);
}
} */
}
ExFreePool(block);
return(STATUS_UNSUCCESSFUL);