public static void Create(AttributeType attrType, AttributeCollationRule collationRule, File file, string name)
{
Index idx = new Index(attrType, collationRule, file, name, file.Context.BiosParameterBlock,
file.Context.UpperCase);
idx.WriteRootNodeToDisk();
}
private Index(AttributeType attrType, AttributeCollationRule collationRule, File file, string name,
BiosParameterBlock bpb, UpperCase upCase)
{
_file = file;
_name = name;
_bpb = bpb;
IsFileIndex = name == "$I30";
_lock = new object();
_blockCache = new ObjectCache <long, IndexBlock>();
_file.CreateStream(AttributeType.IndexRoot, _name);
_root = new IndexRoot
{
AttributeType = (uint)attrType,
CollationRule = collationRule,
IndexAllocationSize = (uint)bpb.IndexBufferSize,
RawClustersPerIndexRecord = bpb.RawIndexBufferSize
};
_comparer = _root.GetCollator(upCase);
_rootNode = new IndexNode(WriteRootNodeToDisk, 0, this, true, 32);
}
public int ReadFrom(byte[] buffer, int offset)
{
_attrType = Utilities.ToUInt32LittleEndian(buffer, 0x00);
_collationRule = (AttributeCollationRule)Utilities.ToUInt32LittleEndian(buffer, 0x04);
_indexAllocationEntrySize = Utilities.ToUInt32LittleEndian(buffer, 0x08);
_rawClustersPerIndexRecord = buffer[0x0C];
return(16);
}
internal void Read(byte[] buffer, int offset)
{
Name = Encoding.Unicode.GetString(buffer, offset + 0, 128).Trim('\0');
Type = (AttributeType)Utilities.ToUInt32LittleEndian(buffer, offset + 0x80);
DisplayRule = Utilities.ToUInt32LittleEndian(buffer, offset + 0x84);
CollationRule = (AttributeCollationRule)Utilities.ToUInt32LittleEndian(buffer, offset + 0x88);
Flags = (AttributeTypeFlags)Utilities.ToUInt32LittleEndian(buffer, offset + 0x8C);
MinSize = Utilities.ToInt64LittleEndian(buffer, offset + 0x90);
MaxSize = Utilities.ToInt64LittleEndian(buffer, offset + 0x98);
}
internal void Read(byte[] buffer, int offset)
{
Name = Encoding.Unicode.GetString(buffer, offset + 0, 128).Trim('\0');
Type = (AttributeType)Utilities.ToUInt32LittleEndian(buffer, offset + 0x80);
DisplayRule = Utilities.ToUInt32LittleEndian(buffer, offset + 0x84);
CollationRule = (AttributeCollationRule)Utilities.ToUInt32LittleEndian(buffer, offset + 0x88);
Flags = (AttributeTypeFlags)Utilities.ToUInt32LittleEndian(buffer, offset + 0x8C);
MinSize = Utilities.ToInt64LittleEndian(buffer, offset + 0x90);
MaxSize = Utilities.ToInt64LittleEndian(buffer, offset + 0x98);
}
private Index(AttributeType attrType, AttributeCollationRule collationRule, File file, string name, BiosParameterBlock bpb, UpperCase upCase)
{
_file = file;
_name = name;
_bpb = bpb;
_isFileIndex = name == "$I30";
_blockCache = new ObjectCache<long, IndexBlock>();
_file.CreateStream(AttributeType.IndexRoot, _name);
_root = new IndexRoot()
{
AttributeType = (uint)attrType,
CollationRule = collationRule,
IndexAllocationSize = (uint)bpb.IndexBufferSize,
RawClustersPerIndexRecord = bpb.RawIndexBufferSize
};
_comparer = _root.GetCollator(upCase);
_rootNode = new IndexNode(WriteRootNodeToDisk, 0, this, true, 32);
}
public Index CreateIndex(string name, AttributeType attrType, AttributeCollationRule collRule)
{
Index.Create(attrType, collRule, this, name);
return(GetIndex(name));
}
public Index CreateIndex(string name, AttributeType attrType, AttributeCollationRule collRule)
{
Index.Create(attrType, collRule, this, name);
return GetIndex(name);
}
public static void Create(AttributeType attrType, AttributeCollationRule collationRule, File file, string name)
{
Index idx = new Index(attrType, collationRule, file, name, file.Context.BiosParameterBlock, file.Context.UpperCase);
idx.WriteRootNodeToDisk();
}
