[sginsberg] 37779: - Make this shit readable -- oh wait this is a commit message... Clean up indentation a bit.
30 Nov
2008
30 Nov
'08
8:12 p.m.
Author: sginsberg
Date: Sun Nov 30 14:12:04 2008
New Revision: 37779
URL: http://svn.reactos.org/svn/reactos?rev=37779&view=rev
Log:
- Make this shit readable -- oh wait this is a commit message... Clean up indentation a
bit.
Modified:
trunk/reactos/drivers/filesystems/fastfat/direntry.c
Modified: trunk/reactos/drivers/filesystems/fastfat/direntry.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/direntry.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/direntry.c [iso-8859-1] Sun Nov 30 14:12:04
2008
@@ -17,137 +17,155 @@
vfatDirEntryGetFirstCluster (PDEVICE_EXTENSION pDeviceExt,
PDIR_ENTRY pFatDirEntry)
{
- ULONG cluster;
-
- if (pDeviceExt->FatInfo.FatType == FAT32)
- {
- cluster = pFatDirEntry->Fat.FirstCluster |
- (pFatDirEntry->Fat.FirstClusterHigh << 16);
- }
- else if (pDeviceExt->Flags & VCB_IS_FATX)
- {
- cluster = pFatDirEntry->FatX.FirstCluster;
- }
- else
- {
- cluster = pFatDirEntry->Fat.FirstCluster;
- }
-
- return cluster;
-}
-
-static BOOLEAN FATIsDirectoryEmpty(PVFATFCB Fcb)
-{
- LARGE_INTEGER FileOffset;
- PVOID Context = NULL;
- PFAT_DIR_ENTRY FatDirEntry;
- ULONG Index, MaxIndex;
-
- if (vfatFCBIsRoot(Fcb))
- {
- Index = 0;
- }
- else
- {
- Index = 2;
- }
-
- FileOffset.QuadPart = 0;
- MaxIndex = Fcb->RFCB.FileSize.u.LowPart / sizeof(FAT_DIR_ENTRY);
-
- while (Index < MaxIndex)
- {
- if (Context == NULL || (Index % FAT_ENTRIES_PER_PAGE) == 0)
- {
- if (Context != NULL)
- {
- CcUnpinData(Context);
- }
- if (!CcMapData(Fcb->FileObject, &FileOffset, PAGE_SIZE, TRUE, &Context,
(PVOID*)&FatDirEntry))
- {
- return TRUE;
- }
- FatDirEntry += Index % FAT_ENTRIES_PER_PAGE;
- }
- if (FAT_ENTRY_END(FatDirEntry))
- {
- CcUnpinData(Context);
- return TRUE;
- }
- if (!FAT_ENTRY_DELETED(FatDirEntry))
- {
- CcUnpinData(Context);
- return FALSE;
- }
- Index++;
- FatDirEntry++;
- }
- if (Context)
- {
- CcUnpinData(Context);
- }
- return TRUE;
-}
-
-static BOOLEAN FATXIsDirectoryEmpty(PVFATFCB Fcb)
-{
- LARGE_INTEGER FileOffset;
- PVOID Context = NULL;
- PFATX_DIR_ENTRY FatXDirEntry;
- ULONG Index, MaxIndex;
-
- Index = 0;
-
- FileOffset.QuadPart = 0;
- MaxIndex = Fcb->RFCB.FileSize.u.LowPart / sizeof(FATX_DIR_ENTRY);
-
- while (Index < MaxIndex)
- {
- if (Context == NULL || (Index % FATX_ENTRIES_PER_PAGE) == 0)
- {
- if (Context != NULL)
- {
+ ULONG cluster;
+
+ if (pDeviceExt->FatInfo.FatType == FAT32)
+ {
+ cluster = pFatDirEntry->Fat.FirstCluster |
+ (pFatDirEntry->Fat.FirstClusterHigh << 16);
+ }
+ else if (pDeviceExt->Flags & VCB_IS_FATX)
+ {
+ cluster = pFatDirEntry->FatX.FirstCluster;
+ }
+ else
+ {
+ cluster = pFatDirEntry->Fat.FirstCluster;
+ }
+
+ return cluster;
+}
+
+static
+BOOLEAN
+FATIsDirectoryEmpty(PVFATFCB Fcb)
+{
+ LARGE_INTEGER FileOffset;
+ PVOID Context = NULL;
+ PFAT_DIR_ENTRY FatDirEntry;
+ ULONG Index, MaxIndex;
+
+ if (vfatFCBIsRoot(Fcb))
+ {
+ Index = 0;
+ }
+ else
+ {
+ Index = 2;
+ }
+
+ FileOffset.QuadPart = 0;
+ MaxIndex = Fcb->RFCB.FileSize.u.LowPart / sizeof(FAT_DIR_ENTRY);
+
+ while (Index < MaxIndex)
+ {
+ if (Context == NULL || (Index % FAT_ENTRIES_PER_PAGE) == 0)
+ {
+ if (Context != NULL)
+ {
+ CcUnpinData(Context);
+ }
+
+ if (!CcMapData(Fcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
&Context, (PVOID*)&FatDirEntry))
+ {
+ return TRUE;
+ }
+
+ FatDirEntry += Index % FAT_ENTRIES_PER_PAGE;
+ }
+
+ if (FAT_ENTRY_END(FatDirEntry))
+ {
CcUnpinData(Context);
- }
- if (!CcMapData(Fcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
&Context, (PVOID*)&FatXDirEntry))
- {
return TRUE;
- }
- FatXDirEntry += Index % FATX_ENTRIES_PER_PAGE;
- }
- if (FATX_ENTRY_END(FatXDirEntry))
- {
- CcUnpinData(Context);
- return TRUE;
- }
- if (!FATX_ENTRY_DELETED(FatXDirEntry))
- {
- CcUnpinData(Context);
- return FALSE;
- }
- Index++;
- FatXDirEntry++;
- }
- if (Context)
- {
- CcUnpinData(Context);
- }
- return TRUE;
-}
-
-BOOLEAN VfatIsDirectoryEmpty(PVFATFCB Fcb)
-{
- if (Fcb->Flags & FCB_IS_FATX_ENTRY)
- return FATXIsDirectoryEmpty(Fcb);
- else
- return FATIsDirectoryEmpty(Fcb);
-}
-
-NTSTATUS FATGetNextDirEntry(PVOID * pContext,
- PVOID * pPage,
- IN PVFATFCB pDirFcb,
- PVFAT_DIRENTRY_CONTEXT DirContext,
- BOOLEAN First)
+ }
+
+ if (!FAT_ENTRY_DELETED(FatDirEntry))
+ {
+ CcUnpinData(Context);
+ return FALSE;
+ }
+
+ Index++;
+ FatDirEntry++;
+ }
+
+ if (Context)
+ {
+ CcUnpinData(Context);
+ }
+
+ return TRUE;
+}
+
+static
+BOOLEAN
+FATXIsDirectoryEmpty(PVFATFCB Fcb)
+{
+ LARGE_INTEGER FileOffset;
+ PVOID Context = NULL;
+ PFATX_DIR_ENTRY FatXDirEntry;
+ ULONG Index = 0, MaxIndex;
+
+ FileOffset.QuadPart = 0;
+ MaxIndex = Fcb->RFCB.FileSize.u.LowPart / sizeof(FATX_DIR_ENTRY);
+
+ while (Index < MaxIndex)
+ {
+ if (Context == NULL || (Index % FATX_ENTRIES_PER_PAGE) == 0)
+ {
+ if (Context != NULL)
+ {
+ CcUnpinData(Context);
+ }
+
+ if (!CcMapData(Fcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
&Context, (PVOID*)&FatXDirEntry))
+ {
+ return TRUE;
+ }
+
+ FatXDirEntry += Index % FATX_ENTRIES_PER_PAGE;
+ }
+
+ if (FATX_ENTRY_END(FatXDirEntry))
+ {
+ CcUnpinData(Context);
+ return TRUE;
+ }
+
+ if (!FATX_ENTRY_DELETED(FatXDirEntry))
+ {
+ CcUnpinData(Context);
+ return FALSE;
+ }
+
+ Index++;
+ FatXDirEntry++;
+ }
+
+ if (Context)
+ {
+ CcUnpinData(Context);
+ }
+
+ return TRUE;
+}
+
+BOOLEAN
+VfatIsDirectoryEmpty(PVFATFCB Fcb)
+{
+ if (Fcb->Flags & FCB_IS_FATX_ENTRY)
+ return FATXIsDirectoryEmpty(Fcb);
+ else
+ return FATIsDirectoryEmpty(Fcb);
+}
+
+NTSTATUS
+FATGetNextDirEntry(PVOID *pContext,
+ PVOID *pPage,
+ IN PVFATFCB pDirFcb,
+ PVFAT_DIRENTRY_CONTEXT DirContext,
+ BOOLEAN First)
{
ULONG dirMap;
PWCHAR pName;
@@ -168,182 +186,198 @@
if (*pContext == NULL || (DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == 0)
{
- if (*pContext != NULL)
- {
- CcUnpinData(*pContext);
- }
- if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
- !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE, pContext,
pPage))
- {
- *pContext = NULL;
- return STATUS_NO_MORE_ENTRIES;
- }
- }
-
+ if (*pContext != NULL)
+ {
+ CcUnpinData(*pContext);
+ }
+
+ if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
+ !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
+ {
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+ }
fatDirEntry = (PFAT_DIR_ENTRY)(*pPage) + DirContext->DirIndex %
FAT_ENTRIES_PER_PAGE;
longNameEntry = (slot*) fatDirEntry;
dirMap = 0;
if (First)
- {
+ {
/* This is the first call to vfatGetNextDirEntry. Possible the start index
points
- * into a long name or points to a short name with an assigned long name.
- * We must go back to the real start of the entry */
+ * into a long name or points to a short name with an assigned long name.
+ * We must go back to the real start of the entry */
while (DirContext->DirIndex > 0 &&
- !FAT_ENTRY_END(fatDirEntry) &&
- !FAT_ENTRY_DELETED(fatDirEntry) &&
- ((!FAT_ENTRY_LONG(fatDirEntry) && !Back) ||
- (FAT_ENTRY_LONG(fatDirEntry) && !(longNameEntry->id & 0x40))))
- {
+ !FAT_ENTRY_END(fatDirEntry) &&
+ !FAT_ENTRY_DELETED(fatDirEntry) &&
+ ((!FAT_ENTRY_LONG(fatDirEntry) && !Back) ||
+ (FAT_ENTRY_LONG(fatDirEntry) && !(longNameEntry->id &
0x40))))
+ {
DirContext->DirIndex--;
- Back = TRUE;
+ Back = TRUE;
+
if ((DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == FAT_ENTRIES_PER_PAGE
- 1)
- {
+ {
CcUnpinData(*pContext);
FileOffset.u.LowPart -= PAGE_SIZE;
+
if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
!CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
- {
- *pContext = NULL;
- return STATUS_NO_MORE_ENTRIES;
- }
+ {
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+
fatDirEntry = (PFAT_DIR_ENTRY)(*pPage) + DirContext->DirIndex %
FAT_ENTRIES_PER_PAGE;
longNameEntry = (slot*) fatDirEntry;
- }
- else
- {
+ }
+ else
+ {
fatDirEntry--;
- longNameEntry--;
- }
- }
+ longNameEntry--;
+ }
+ }
if (Back && !FAT_ENTRY_END(fatDirEntry) &&
- (FAT_ENTRY_DELETED(fatDirEntry) || !FAT_ENTRY_LONG(fatDirEntry)))
- {
+ (FAT_ENTRY_DELETED(fatDirEntry) || !FAT_ENTRY_LONG(fatDirEntry)))
+ {
DirContext->DirIndex++;
- if ((DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == 0)
- {
- CcUnpinData(*pContext);
- FileOffset.u.LowPart += PAGE_SIZE;
- if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
- !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
- {
- *pContext = NULL;
- return STATUS_NO_MORE_ENTRIES;
- }
- fatDirEntry = (PFAT_DIR_ENTRY)*pPage;
- longNameEntry = (slot*) *pPage;
- }
- else
- {
- fatDirEntry++;
- longNameEntry++;
- }
- }
- }
+
+ if ((DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == 0)
+ {
+ CcUnpinData(*pContext);
+ FileOffset.u.LowPart += PAGE_SIZE;
+
+ if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
+ !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
+ {
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+
+ fatDirEntry = (PFAT_DIR_ENTRY)*pPage;
+ longNameEntry = (slot*) *pPage;
+ }
+ else
+ {
+ fatDirEntry++;
+ longNameEntry++;
+ }
+ }
+ }
DirContext->StartIndex = DirContext->DirIndex;
CheckSum = 0;
while (TRUE)
- {
- if (FAT_ENTRY_END(fatDirEntry))
- {
- CcUnpinData(*pContext);
- *pContext = NULL;
- return STATUS_NO_MORE_ENTRIES;
- }
-
- if (FAT_ENTRY_DELETED(fatDirEntry))
- {
- dirMap = 0;
- DirContext->LongNameU.Buffer[0] = 0;
- DirContext->StartIndex = DirContext->DirIndex + 1;
- }
- else
- {
- if (FAT_ENTRY_LONG(fatDirEntry))
- {
- if (dirMap == 0)
- {
- DPRINT (" long name entry found at %d\n", DirContext->DirIndex);
- RtlZeroMemory(DirContext->LongNameU.Buffer,
DirContext->LongNameU.MaximumLength);
- CheckSum = longNameEntry->alias_checksum;
- Valid = TRUE;
- }
-
- DPRINT (" name chunk1:[%.*S] chunk2:[%.*S] chunk3:[%.*S]\n",
- 5, longNameEntry->name0_4,
- 6, longNameEntry->name5_10,
- 2, longNameEntry->name11_12);
-
- index = (longNameEntry->id & 0x1f) - 1;
- dirMap |= 1 << index;
- pName = DirContext->LongNameU.Buffer + 13 * index;
-
- RtlCopyMemory(pName, longNameEntry->name0_4, 5 * sizeof(WCHAR));
- RtlCopyMemory(pName + 5, longNameEntry->name5_10, 6 * sizeof(WCHAR));
- RtlCopyMemory(pName + 11, longNameEntry->name11_12, 2 * sizeof(WCHAR));
-
- DPRINT (" longName: [%S]\n", DirContext->LongNameU.Buffer);
- if (CheckSum != longNameEntry->alias_checksum)
- {
- DPRINT1("Found wrong alias checksum in long name entry (first %x, current %x,
%S)\n",
- CheckSum, longNameEntry->alias_checksum, DirContext->LongNameU.Buffer);
- Valid = FALSE;
- }
- }
- else
- {
- shortCheckSum = 0;
+ {
+ if (FAT_ENTRY_END(fatDirEntry))
+ {
+ CcUnpinData(*pContext);
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+
+ if (FAT_ENTRY_DELETED(fatDirEntry))
+ {
+ dirMap = 0;
+ DirContext->LongNameU.Buffer[0] = 0;
+ DirContext->StartIndex = DirContext->DirIndex + 1;
+ }
+ else
+ {
+ if (FAT_ENTRY_LONG(fatDirEntry))
+ {
+ if (dirMap == 0)
+ {
+ DPRINT (" long name entry found at %d\n",
DirContext->DirIndex);
+ RtlZeroMemory(DirContext->LongNameU.Buffer,
DirContext->LongNameU.MaximumLength);
+ CheckSum = longNameEntry->alias_checksum;
+ Valid = TRUE;
+ }
+
+ DPRINT(" name chunk1:[%.*S] chunk2:[%.*S] chunk3:[%.*S]\n",
+ 5, longNameEntry->name0_4,
+ 6, longNameEntry->name5_10,
+ 2, longNameEntry->name11_12);
+
+ index = (longNameEntry->id & 0x1f) - 1;
+ dirMap |= 1 << index;
+ pName = DirContext->LongNameU.Buffer + 13 * index;
+
+ RtlCopyMemory(pName, longNameEntry->name0_4, 5 * sizeof(WCHAR));
+ RtlCopyMemory(pName + 5, longNameEntry->name5_10, 6 * sizeof(WCHAR));
+ RtlCopyMemory(pName + 11, longNameEntry->name11_12, 2 *
sizeof(WCHAR));
+
+ DPRINT (" longName: [%S]\n",
DirContext->LongNameU.Buffer);
+
+ if (CheckSum != longNameEntry->alias_checksum)
+ {
+ DPRINT1("Found wrong alias checksum in long name entry (first
%x, current %x, %S)\n",
+ CheckSum, longNameEntry->alias_checksum,
DirContext->LongNameU.Buffer);
+ Valid = FALSE;
+ }
+ }
+ else
+ {
+ shortCheckSum = 0;
for (i = 0; i < 11; i++)
- {
+ {
shortCheckSum = (((shortCheckSum & 1) << 7)
| ((shortCheckSum & 0xfe) >> 1))
+ fatDirEntry->ShortName[i];
- }
- if (shortCheckSum != CheckSum && DirContext->LongNameU.Buffer[0])
- {
- DPRINT1("Checksum from long and short name is not equal (short: %x, long: %x,
%S)\n",
- shortCheckSum, CheckSum, DirContext->LongNameU.Buffer);
- DirContext->LongNameU.Buffer[0] = 0;
- }
- if (Valid == FALSE)
- {
- DirContext->LongNameU.Buffer[0] = 0;
- }
-
- RtlCopyMemory (&DirContext->DirEntry.Fat, fatDirEntry, sizeof
(FAT_DIR_ENTRY));
- break;
- }
- }
- DirContext->DirIndex++;
- if ((DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == 0)
- {
- CcUnpinData(*pContext);
- FileOffset.u.LowPart += PAGE_SIZE;
- if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
- !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE, pContext,
pPage))
- {
- *pContext = NULL;
- return STATUS_NO_MORE_ENTRIES;
- }
- fatDirEntry = (PFAT_DIR_ENTRY)*pPage;
- longNameEntry = (slot*) *pPage;
- }
- else
- {
- fatDirEntry++;
- longNameEntry++;
- }
- }
+ }
+
+ if (shortCheckSum != CheckSum &&
DirContext->LongNameU.Buffer[0])
+ {
+ DPRINT1("Checksum from long and short name is not equal (short:
%x, long: %x, %S)\n",
+ shortCheckSum, CheckSum, DirContext->LongNameU.Buffer);
+ DirContext->LongNameU.Buffer[0] = 0;
+ }
+
+ if (Valid == FALSE)
+ {
+ DirContext->LongNameU.Buffer[0] = 0;
+ }
+
+ RtlCopyMemory (&DirContext->DirEntry.Fat, fatDirEntry, sizeof
(FAT_DIR_ENTRY));
+ break;
+ }
+ }
+
+ DirContext->DirIndex++;
+
+ if ((DirContext->DirIndex % FAT_ENTRIES_PER_PAGE) == 0)
+ {
+ CcUnpinData(*pContext);
+ FileOffset.u.LowPart += PAGE_SIZE;
+
+ if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
+ !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
+ {
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+
+ fatDirEntry = (PFAT_DIR_ENTRY)*pPage;
+ longNameEntry = (slot*) *pPage;
+ }
+ else
+ {
+ fatDirEntry++;
+ longNameEntry++;
+ }
+ }
+
DirContext->LongNameU.Length = wcslen(DirContext->LongNameU.Buffer) *
sizeof(WCHAR);
vfat8Dot3ToString(&DirContext->DirEntry.Fat, &DirContext->ShortNameU);
+
if (DirContext->LongNameU.Length == 0)
- {
+ {
RtlCopyUnicodeString(&DirContext->LongNameU,
&DirContext->ShortNameU);
- }
+ }
+
return STATUS_SUCCESS;
}
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sginsberg＠svn.reactos.org