#include "vfat.h"
-#define CACHEPAGESIZE(pDeviceExt) ((pDeviceExt)->FatInfo.BytesPerCluster > PAGE_SIZE ? \
- (pDeviceExt)->FatInfo.BytesPerCluster : PAGE_SIZE)
-
-#define ENTRIES_PER_CACHEPAGE(pDeviceExt) (ENTRIES_PER_SECTOR * \
- (CACHEPAGESIZE(pDeviceExt) / ((pDeviceExt)->FatInfo.BytesPerSector)))
-
+#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof (FATDirEntry))
ULONG
vfatDirEntryGetFirstCluster (PDEVICE_EXTENSION pDeviceExt,
BOOL
vfatIsDirEntryVolume (FATDirEntry * pFatDirEntry)
{
- return pFatDirEntry->Attrib == 0x28;
+ return 0x08 == (pFatDirEntry->Attrib & 0x1f);
}
void
vfatGetDirEntryName (PFAT_DIR_ENTRY dirEntry, PWSTR entryName)
{
- vfat8Dot3ToString (dirEntry->Filename, dirEntry->Ext, entryName);
+ vfat8Dot3ToString (dirEntry, entryName);
}
-NTSTATUS
-vfatGetNextDirEntry (PDEVICE_EXTENSION pDeviceExt,
- PVFATFCB pDirectoryFCB,
- ULONG * pDirectoryIndex,
- PWSTR pLongFileName,
- PFAT_DIR_ENTRY pDirEntry)
+
+NTSTATUS vfatGetNextDirEntry(PVOID * pContext,
+ PVOID * pPage,
+ IN PVFATFCB pDirFcb,
+ IN OUT PULONG pDirIndex,
+ OUT PWSTR pFileName,
+ OUT PFAT_DIR_ENTRY pDirEntry,
+ OUT PULONG pStartIndex)
{
- ULONG indexInPage = *pDirectoryIndex % ENTRIES_PER_CACHEPAGE(pDeviceExt);
- ULONG pageNumber = *pDirectoryIndex / ENTRIES_PER_CACHEPAGE(pDeviceExt);
- PVOID currentPage = NULL;
- FATDirEntry * fatDirEntry;
- slot * longNameEntry;
- ULONG cpos;
- LARGE_INTEGER FileOffset;
- PVOID Context;
-
- DPRINT ("vfatGetNextDirEntry (%x,%x,%d,%x,%x)\n",
- pDeviceExt,
- pDirectoryFCB,
- *pDirectoryIndex,
- pLongFileName,
- pDirEntry);
-
- *pLongFileName = 0;
-
- FileOffset.QuadPart = pageNumber * CACHEPAGESIZE(pDeviceExt);
- if (!CcMapData(pDirectoryFCB->FileObject, &FileOffset,
- CACHEPAGESIZE(pDeviceExt), TRUE, &Context, ¤tPage))
- {
- return STATUS_UNSUCCESSFUL;
- }
+ ULONG dirMap;
+ PWCHAR pName;
+ LARGE_INTEGER FileOffset;
+ FATDirEntry * fatDirEntry;
+ slot * longNameEntry;
+ ULONG index;
- while (TRUE)
- {
- fatDirEntry = (FATDirEntry *) currentPage;
+ *pFileName = 0;
- if (vfatIsDirEntryEndMarker (&fatDirEntry [indexInPage]))
+ FileOffset.u.HighPart = 0;
+ FileOffset.u.LowPart = ROUND_DOWN(*pDirIndex * sizeof(FATDirEntry), PAGE_SIZE);
+
+ if (*pContext == NULL || (*pDirIndex % ENTRIES_PER_PAGE) == 0)
{
- DPRINT ("end of directory, returning no more entries\n");
- CcUnpinData(Context);
- return STATUS_NO_MORE_ENTRIES;
+ if (*pContext != NULL)
+ {
+ CcUnpinData(*pContext);
+ }
+ if (!CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE, pContext, pPage))
+ {
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
}
- else if (vfatIsDirEntryLongName (&fatDirEntry [indexInPage])
- && !vfatIsDirEntryDeleted (&fatDirEntry [indexInPage]))
+
+
+ fatDirEntry = (FATDirEntry*)(*pPage) + *pDirIndex % ENTRIES_PER_PAGE;
+ longNameEntry = (slot*) fatDirEntry;
+ dirMap = 0;
+
+ if (pStartIndex)
{
- DPRINT (" long name entry found at %d\n", *pDirectoryIndex);
- longNameEntry = (slot *) currentPage;
-
- DPRINT (" name chunk1:[%.*S] chunk2:[%.*S] chunk3:[%.*S]\n",
- 5, longNameEntry [indexInPage].name0_4,
- 6, longNameEntry [indexInPage].name5_10,
- 2, longNameEntry [indexInPage].name11_12);
-
- vfat_initstr (pLongFileName, 256);
- vfat_wcsncpy (pLongFileName, longNameEntry [indexInPage].name0_4, 5);
- vfat_wcsncat (pLongFileName, longNameEntry [indexInPage].name5_10, 5, 6);
- vfat_wcsncat (pLongFileName, longNameEntry [indexInPage].name11_12, 11, 2);
-
- DPRINT (" longName: [%S]\n", pLongFileName);
-
- cpos = 0;
- while ((longNameEntry [indexInPage].id != 0x41) &&
- (longNameEntry [indexInPage].id != 0x01) &&
- (longNameEntry [indexInPage].attr > 0))
- {
- (*pDirectoryIndex)++;
- indexInPage++;
- if (indexInPage == ENTRIES_PER_CACHEPAGE(pDeviceExt))
- {
- indexInPage = 0;
- pageNumber++;
-
- CcUnpinData(Context);
- FileOffset.QuadPart = pageNumber * CACHEPAGESIZE(pDeviceExt);
- if (!CcMapData(pDirectoryFCB->FileObject, &FileOffset,
- CACHEPAGESIZE(pDeviceExt), TRUE, &Context, ¤tPage))
- {
- return STATUS_UNSUCCESSFUL;
- }
- longNameEntry = (slot *) currentPage;
- }
- DPRINT (" index %d\n", *pDirectoryIndex);
-
- DPRINT (" name chunk1:[%.*S] chunk2:[%.*S] chunk3:[%.*S]\n",
- 5, longNameEntry [indexInPage].name0_4,
- 6, longNameEntry [indexInPage].name5_10,
- 2, longNameEntry [indexInPage].name11_12);
-
- cpos++;
- vfat_movstr (pLongFileName, 13, 0, cpos * 13);
- vfat_wcsncpy (pLongFileName, longNameEntry [indexInPage].name0_4, 5);
- vfat_wcsncat (pLongFileName, longNameEntry [indexInPage].name5_10, 5, 6);
- vfat_wcsncat (pLongFileName, longNameEntry [indexInPage].name11_12, 11, 2);
-
- DPRINT (" longName: [%S]\n", pLongFileName);
-
- }
- (*pDirectoryIndex)++;
- indexInPage++;
- if (indexInPage == ENTRIES_PER_CACHEPAGE(pDeviceExt))
- {
- indexInPage = 0;
- pageNumber++;
-
- CcUnpinData(Context);
- FileOffset.QuadPart = pageNumber * CACHEPAGESIZE(pDeviceExt);
- if (!CcMapData(pDirectoryFCB->FileObject, &FileOffset,
- CACHEPAGESIZE(pDeviceExt), TRUE, &Context, ¤tPage))
- {
- return STATUS_UNSUCCESSFUL;
- }
- }
+ *pStartIndex = *pDirIndex;
}
- else
+
+ while (TRUE)
{
- memcpy (pDirEntry, &fatDirEntry [indexInPage], sizeof (FAT_DIR_ENTRY));
- (*pDirectoryIndex)++;
- break;
+ if (vfatIsDirEntryEndMarker(fatDirEntry))
+ {
+ CcUnpinData(*pContext);
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+
+ if (vfatIsDirEntryDeleted (fatDirEntry))
+ {
+ dirMap = 0;
+ *pFileName = 0;
+ if (pStartIndex)
+ {
+ *pStartIndex = *pDirIndex + 1;
+ }
+ }
+ else
+ {
+ if (vfatIsDirEntryLongName (fatDirEntry))
+ {
+ if (dirMap == 0)
+ {
+ DPRINT (" long name entry found at %d\n", *pDirIndex);
+ memset(pFileName, 0, 256 * sizeof(WCHAR));
+ }
+
+ 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 = pFileName + 13 * index;
+
+ memcpy(pName, longNameEntry->name0_4, 5 * sizeof(WCHAR));
+ memcpy(pName + 5, longNameEntry->name5_10, 6 * sizeof(WCHAR));
+ memcpy(pName + 11, longNameEntry->name11_12, 2 * sizeof(WCHAR));
+
+ DPRINT (" longName: [%S]\n", pFileName);
+ }
+ else
+ {
+ memcpy (pDirEntry, fatDirEntry, sizeof (FAT_DIR_ENTRY));
+ break;
+ }
+ }
+ (*pDirIndex)++;
+ if ((*pDirIndex % ENTRIES_PER_PAGE) == 0)
+ {
+ CcUnpinData(*pContext);
+ FileOffset.u.LowPart += PAGE_SIZE;
+ if (!CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE, pContext, pPage))
+ {
+ CHECKPOINT;
+ *pContext = NULL;
+ return STATUS_NO_MORE_ENTRIES;
+ }
+ fatDirEntry = (FATDirEntry*)*pPage;
+ longNameEntry = (slot*) *pPage;
+ }
+ else
+ {
+ fatDirEntry++;
+ longNameEntry++;
+ }
}
- }
- CcUnpinData(Context);
- return STATUS_SUCCESS;
+ return STATUS_SUCCESS;
}
+
+
+
git://git.jankratochvil.net / reactos.git / blobdiff