[pschweitzer] 68310: [NTFS] Simplify the implementation of NtfsGetFileSize()

Author: pschweitzer
Date: Sun Jun 28 21:26:19 2015
New Revision: 68310

URL: http://svn.reactos.org/svn/reactos?rev=68310&view=rev
Log:
[NTFS]
Simplify the implementation of NtfsGetFileSize()

Modified:
    trunk/reactos/drivers/filesystems/ntfs/dirctl.c

Modified: trunk/reactos/drivers/filesystems/ntfs/dirctl.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/ntfs/di...
==============================================================================
--- trunk/reactos/drivers/filesystems/ntfs/dirctl.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/ntfs/dirctl.c	[iso-8859-1] Sun Jun 28 21:26:19 2015
@@ -36,24 +36,20 @@

static ULONGLONG
-NtfsGetFileSize(PFILE_RECORD_HEADER FileRecord,
+NtfsGetFileSize(PDEVICE_EXTENSION DeviceExt,
+                PFILE_RECORD_HEADER FileRecord,
                 PFILENAME_ATTRIBUTE FileName)
 {
     ULONGLONG Size;
-    PNTFS_ATTR_RECORD Attribute;
+    NTSTATUS Status;
+    PNTFS_ATTR_CONTEXT DataContext;

Size = FileName->AllocatedSize;
-    Attribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)FileRecord + FileRecord->AttributeOffset);
-    while (Attribute < (PNTFS_ATTR_RECORD)((ULONG_PTR)FileRecord + FileRecord->BytesInUse) &&
-           Attribute->Type != AttributeEnd)
-    {
-        if (Attribute->Type == AttributeData && Attribute->NameLength == 0)
-        {
-            Size = AttributeDataLength(Attribute);
-            break;
-        }
-
-        Attribute = (PNTFS_ATTR_RECORD)((ULONG_PTR)Attribute + Attribute->Length);
+    Status = FindAttribute(DeviceExt, FileRecord, AttributeData, L"", 0, &DataContext);
+    if (NT_SUCCESS(Status))
+    {
+        Size = AttributeDataLength(&DataContext->Record);
+        ReleaseAttributeContext(DataContext);
     }

return Size;
@@ -134,7 +130,7 @@
     /* Convert file flags */
     NtfsFileFlagsToAttributes(FileName->FileAttributes | StdInfo->FileAttribute, &Info->FileAttributes);

-    Info->EndOfFile.QuadPart = NtfsGetFileSize(FileRecord, FileName);
+    Info->EndOfFile.QuadPart = NtfsGetFileSize(DeviceExt, FileRecord, FileName);
     Info->AllocationSize.QuadPart = ROUND_UP(Info->EndOfFile.QuadPart, DeviceExt->NtfsInfo.BytesPerCluster);

Info->FileIndex = MFTIndex;
@@ -184,7 +180,7 @@
     /* Convert file flags */
     NtfsFileFlagsToAttributes(FileName->FileAttributes | StdInfo->FileAttribute, &Info->FileAttributes);

-    Info->EndOfFile.QuadPart = NtfsGetFileSize(FileRecord, FileName);
+    Info->EndOfFile.QuadPart = NtfsGetFileSize(DeviceExt, FileRecord, FileName);
     Info->AllocationSize.QuadPart = ROUND_UP(Info->EndOfFile.QuadPart, DeviceExt->NtfsInfo.BytesPerCluster);

Info->FileIndex = MFTIndex;
@@ -249,7 +245,7 @@
     /* Convert file flags */
     NtfsFileFlagsToAttributes(FileName->FileAttributes | StdInfo->FileAttribute, &Info->FileAttributes);

-    Info->EndOfFile.QuadPart = NtfsGetFileSize(FileRecord, FileName);
+    Info->EndOfFile.QuadPart = NtfsGetFileSize(DeviceExt, FileRecord, FileName);
     Info->AllocationSize.QuadPart = ROUND_UP(Info->EndOfFile.QuadPart, DeviceExt->NtfsInfo.BytesPerCluster);

Info->FileIndex = MFTIndex;