TNTFSDiskNode - Revision history

Ultibo: Created page with "Return to Unit NTFSClass TOC === Description === ---- ''To be documented'' === Class definitions === ----

2018-05-24T05:53:34Z

Created page with "Return to Unit NTFSClass TOC === Description === ---- ''To be documented'' === Class definitions === ---- <div class="toccolours mw-collapsible m..."

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Return to [[Unit_NTFSClass|Unit NTFSClass]]

TOC

=== Description ===
----

''To be documented''

=== Class definitions ===
----

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<code>TNTFSDiskNode = class(TListObject)</code>
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{| class="wikitable" style="font-size: 14px; background: white;"
|-
|colspan="2"|Note: Represents an INDX record header.
|-
|colspan="2"| 
|-
| <code>constructor Create(ALocalLock:TMutexHandle; AIndex:TNTFSDiskIndex);</code>
| style="width: 50%;"| 
|-
| <code>destructor Destroy; override;</code>
|  
|-
|colspan="2"|<div style="font-family: monospace,courier;">'''private'''</div>
|-
| <code>FLocalLock:TMutexHandle;</code>
|  
|-
|colspan="2"| 
|-
| <code>FStatus:LongWord;</code>
|  
|-
|colspan="2"| 
|-
| <code>FIndexFlags:Word;</code>
| Flags (See Consts)
|-
| <code>FIndexSize:LongWord;</code>
| Total size of the Index Entries
|-
| <code>FIndexAllocated:LongWord;</code>
| Allocated size of the Index Entries
|-
| <code>FEntryOffset:LongWord;</code>
| Offset to first Index Entry
|-
|colspan="2"| 
|-
| <code>FRecordNumber:Int64;</code>
| Number of this INDX record in the Index Allocation
|-
| <code>FUpdateSequenceOffset:Word;</code>
| Offset to the Update Sequence Record
|-
| <code>FUpdateSequenceLength:Word;</code>
| Size in words of the Update Sequence Record
|-
|colspan="2"| 
|-
| <code>FUpdateSequenceNumber:Word;</code>
| Update Sequence Number
|-
| <code>FLogFileSequenceNumber:Int64;</code>
| LogFile sequence number
|-
|colspan="2"| 
|-
| <code>FIndex:TNTFSDiskIndex;</code>
| Index owning this node
|-
| <code>FBlank:TNTFSDiskKey;</code>
| Blank key of this node (Blank keys do not move)
|-
|colspan="2"| 
|-
| <code>function AcquireLock:Boolean;</code>
|  
|-
| <code>function ReleaseLock:Boolean;</code>
|  
|-
|colspan="2"| 
|-
| <code>function GetAdded:Boolean;</code>
|  
|-
| <code>procedure SetAdded(AValue:Boolean);</code>
|  
|-
| <code>function GetDeleted:Boolean;</code>
|  
|-
| <code>procedure SetDeleted(AValue:Boolean);</code>
|  
|-
| <code>function GetChanged:Boolean;</code>
|  
|-
| <code>procedure SetChanged(AValue:Boolean);</code>
|  
|-
|colspan="2"| 
|-
| <code>function GetModified:Boolean;</code>
|  
|-
| <code>procedure SetModified(AValue:Boolean);</code>
|  
|-
|colspan="2"| 
|-
| <code>function GetIsRoot:Boolean;</code>
|  
|-
|colspan="2"| 
|-
| <code>function GetHasSubNodes:Boolean;</code>
|  
|-
| <code>procedure SetHasSubNodes(AValue:Boolean);</code>
|  
|-
|colspan="2"| 
|-
| <code>function GetStart:TNTFSDiskKey;</code>
|  
|-
|colspan="2"|<div style="font-family: monospace,courier;">'''public'''</div>
|-
| <code>property Added:Boolean read GetAdded write SetAdded;</code>
| Index record to be allocated
|-
| <code>property Deleted:Boolean read GetDeleted write SetDeleted;</code>
| Index record to be deallocated
|-
| <code>property Changed:Boolean read GetChanged write SetChanged;</code>
| Index record to be updated
|-
|colspan="2"| 
|-
| <code>property Modified:Boolean read GetModified write SetModified;</code>
| Index record has been added, deleted or changed
|-
|colspan="2"| 
|-
| <code>property IsRoot:Boolean read GetIsRoot;</code>
|  
|-
|colspan="2"| 
|-
| <code>property HasSubNodes:Boolean read GetHasSubNodes write SetHasSubNodes;</code>
|  
|-
|colspan="2"| 
|-
| <code>property IndexFlags:Word read FIndexFlags write FIndexFlags;</code>
|  
|-
| <code>property IndexSize:LongWord read FIndexSize write FIndexSize;</code>
|  
|-
| <code>property IndexAllocated:LongWord read FIndexAllocated write FIndexAllocated;</code>
|  
|-
| <code>property EntryOffset:LongWord read FEntryOffset write FEntryOffset;</code>
|  
|-
|colspan="2"| 
|-
| <code>property RecordNumber:Int64 read FRecordNumber write FRecordNumber;</code>
|  
|-
| <code>property UpdateSequenceOffset:Word read FUpdateSequenceOffset write FUpdateSequenceOffset;</code>
|  
|-
| <code>property UpdateSequenceLength:Word read FUpdateSequenceLength write FUpdateSequenceLength;</code>
|  
|-
|colspan="2"| 
|-
| <code>property UpdateSequenceNumber:Word read FUpdateSequenceNumber write FUpdateSequenceNumber;</code>
|  
|-
| <code>property LogFileSequenceNumber:Int64 read FLogFileSequenceNumber write FLogFileSequenceNumber;</code>
|  
|-
|colspan="2"| 
|-
| <code>property Index:TNTFSDiskIndex read FIndex;</code>
|  
|-
| <code>property Blank:TNTFSDiskKey read FBlank write FBlank;</code>
|  
|-
| <code>property Start:TNTFSDiskKey read GetStart;</code>
|  
|-
|colspan="2"| 
|-
| <code>function KeyCount:Integer;</code>
|  
|-
|colspan="2"| 
|-
| <code>function IndexFree:LongWord;</code>
|  
|-
|colspan="2"| 
|-
| <code>function UpdateKeys(AVersion:Word):Boolean; virtual;</code>
|  
|-
|colspan="2"| 
|-
| <code>function CalculatedSize(AVersion:Word):LongWord;</code>
|  
|-
| <code>function CalculatedOffset(AVersion:Word):LongWord;</code>
|  
|-
| <code>function CalculatedAllocated(AVersion:Word):LongWord;</code>
|  
|-
| <code>function CalculatedSequenceOffset(AVersion:Word):Word;</code>
|  
|-
| <code>function CalculatedSequenceLength(ASectorSize:Word):Word;</code>
|  
|-
|colspan="2"| 
|-
| <code>function WriteEmpty(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word; var AUpdateSequenceOffset,AUpdateSequenceLength:Word):Boolean;</code>
|  
|-
|colspan="2"| 
|-
| <code>function ReadRecord(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</code>
|  
|-
| <code>function WriteRecord(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</code>
|  
|-
|colspan="2"| 
|-
| <code>function ReadHeader(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</code>
|  
|-
| <code>function WriteHeader(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</code>
|  
|-
|}
</div></div>
<br />

=== Function declarations ===
----

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<pre style="border: 0; padding-bottom:0px;">constructor TNTFSDiskNode.Create(ALocalLock:TMutexHandle; AIndex:TNTFSDiskIndex);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">destructor TNTFSDiskNode.Destroy;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.AcquireLock:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.ReleaseLock:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetAdded:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">procedure TNTFSDiskNode.SetAdded(AValue:Boolean);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetDeleted:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">procedure TNTFSDiskNode.SetDeleted(AValue:Boolean);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetChanged:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">procedure TNTFSDiskNode.SetChanged(AValue:Boolean);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetModified:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<pre style="border: 0; padding-bottom:0px;">procedure TNTFSDiskNode.SetModified(AValue:Boolean);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetIsRoot:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetHasSubNodes:Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">procedure TNTFSDiskNode.SetHasSubNodes(AValue:Boolean);</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| None documented
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|}
</div></div>
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.GetStart:TNTFSDiskKey;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| Includes the blank key which may be the only key
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.KeyCount:Integer;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| Includes the blank key which may be the only key
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.IndexFree:LongWord;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Determine the free space remaining in the node</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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</div></div>
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.UpdateKeys(AVersion:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Update Flags and Sub Node Number on all keys</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| None documented
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<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.CalculatedSize(AVersion:Word):LongWord;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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! Note
| Calculated Size includes any rounding required for alignment
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.CalculatedOffset(AVersion:Word):LongWord;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Determine the entry offset for this node based on version</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| Will be different for root node versus other nodes
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.CalculatedAllocated(AVersion:Word):LongWord;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Determine the index allocated for this node based on version</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| Will be different for root node versus other nodes
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.CalculatedSequenceOffset(AVersion:Word):Word;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Determine the update sequence offset for this node based on version</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| Root node will have a sequence offset of zero
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.CalculatedSequenceLength(ASectorSize:Word):Word;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Determine the update sequence length for this node based on sector size</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| Sequence Length is the number of Words in the update sequence array
Root node will have a sequence length of zero
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.WriteEmpty(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word; var AUpdateSequenceOffset,AUpdateSequenceLength:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Write an empty index record, index header and index entry to the supplied buffer at the supplied offset</div>
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{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| None documented
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.ReadRecord(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Read the index record and index header from the supplied buffer at the supplied offset</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| None documented
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.WriteRecord(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Write the index record and index header to the supplied buffer at the supplied offset</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| None documented
|-
|}
</div></div>
<br />
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.ReadHeader(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Read the index header from the supplied buffer at the supplied offset</div>
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
{| class="wikitable" style="font-size: 14px; background: white;"
|-
! Note
| None documented
|-
|}
</div></div>
<br />
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<pre style="border: 0; padding-bottom:0px;">function TNTFSDiskNode.WriteHeader(ABuffer:Pointer; var AOffset,ASize:LongWord; AVersion:Word):Boolean;</pre>
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Write the index header to the supplied buffer at the supplied offset</div>
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