public AttributeRecord CreateAttributeRecord(AttributeType type, string name)
{
AttributeRecord attribute = AttributeRecord.Create(type, name, m_segments[0].NextAttributeInstance);
m_segments[0].NextAttributeInstance++;
FileRecordHelper.InsertSorted(this.Attributes, attribute);
return(attribute);
}
public AttributeRecord CreateAttributeRecord(AttributeType type, string name)
{
AttributeRecord attribute = AttributeRecord.Create(type, name, NextAttributeInstance);
NextAttributeInstance++;
FileRecordHelper.InsertSorted(m_immediateAttributes, attribute);
return(attribute);
}
public void Extend(ulong additionalLengthInBytes)
{
ulong currentSize = this.Length;
if (m_attributeRecord is NonResidentAttributeRecord)
{
NonResidentAttributeData attributeData = new NonResidentAttributeData(m_volume, m_fileRecord, (NonResidentAttributeRecord)m_attributeRecord);
attributeData.Extend(additionalLengthInBytes);
}
else
{
byte[] data = ((ResidentAttributeRecord)m_attributeRecord).Data;
ulong finalDataLength = (uint)data.Length + additionalLengthInBytes;
ulong finalRecordLength = (uint)m_attributeRecord.RecordLength + additionalLengthInBytes;
if (finalRecordLength >= (ulong)m_volume.AttributeRecordLengthToMakeNonResident &&
m_attributeRecord.AttributeType != AttributeType.AttributeList) // We will create an attribute list with the right attribute form in advance.
{
// Convert the attribute to non-resident
long clustersToAllocate = (long)Math.Ceiling((double)finalDataLength / m_volume.BytesPerCluster);
if (clustersToAllocate > m_volume.NumberOfFreeClusters)
{
throw new DiskFullException();
}
NonResidentAttributeRecord attributeRecord = NonResidentAttributeRecord.Create(m_attributeRecord.AttributeType, m_attributeRecord.Name);
NonResidentAttributeData attributeData = new NonResidentAttributeData(m_volume, null, attributeRecord);
attributeData.Extend(finalDataLength);
if (data.Length % m_volume.BytesPerCluster > 0)
{
int fillDataLength = m_volume.BytesPerCluster - (data.Length % m_volume.BytesPerCluster);
if ((uint)data.Length + (uint)fillDataLength < finalDataLength)
{
// Only the last cluster can be partially used, if this is not the last cluster, zero-fill it
data = ByteUtils.Concatenate(data, new byte[fillDataLength]);
}
}
attributeData.WriteClusters(0, data);
// Note that we overwrite the old attribute only after writing the non-resident data
if (m_fileRecord != null)
{
m_fileRecord.RemoveAttributeRecord(m_attributeRecord.AttributeType, m_attributeRecord.Name);
FileRecordHelper.InsertSorted(m_fileRecord.Attributes, attributeRecord);
}
m_attributeRecord = attributeRecord;
}
else
{
int currentLength = data.Length;
byte[] temp = new byte[currentLength + (int)additionalLengthInBytes];
Array.Copy(data, temp, data.Length);
((ResidentAttributeRecord)m_attributeRecord).Data = temp;
}
if (m_fileRecord != null)
{
m_volume.UpdateFileRecord(m_fileRecord);
}
}
}
internal AttributeRecord CreateAttributeRecord(AttributeType type, string name, bool isResident)
{
AttributeRecord attribute = AttributeRecord.Create(type, name, isResident);
attribute.Instance = NextAttributeInstance;
NextAttributeInstance++;
FileRecordHelper.InsertSorted(m_immediateAttributes, attribute);
return(attribute);
}
public AttributeRecord CreateAttributeRecord(AttributeType type, string name)
{
if (name.Length > AttributeRecord.MaxAttributeNameLength)
{
throw new InvalidNameException();
}
bool isResident = (type != AttributeType.IndexAllocation);
AttributeRecord attribute = AttributeRecord.Create(type, name, isResident);
FileRecordHelper.InsertSorted(this.Attributes, attribute);
return(attribute);
}
public AttributeRecord CreateAttributeListRecord(bool isResident)
{
AttributeRecord attribute;
if (isResident)
{
attribute = AttributeRecord.Create(AttributeType.AttributeList, String.Empty, NextAttributeInstance);
}
else
{
attribute = NonResidentAttributeRecord.Create(AttributeType.AttributeList, String.Empty, NextAttributeInstance);
}
NextAttributeInstance++;
FileRecordHelper.InsertSorted(m_immediateAttributes, attribute);
return(attribute);
}