public BlobCell(StructField def, Stream baseStream, int offset, int baseSize, BlobDecoder decoder, int decodedSize)
: base(def, null, offset)
{
_baseStream = baseStream;
_baseSize = baseSize;
_decoder = decoder;
_decodedSize = decodedSize;
}
public BlobCell(StructField def, Stream baseStream, int offset, int baseSize, BlobDecoder decoder, int decodedSize)
: base(def, null, offset)
{
_baseStream = baseStream;
_baseSize = baseSize;
_decoder = decoder;
_decodedSize = decodedSize;
}
public override void LoadData(BinaryReader reader, StructInstance instance)
{
int offset = (int)reader.BaseStream.Position;
int len;
try
{
len = GetExpressionAttribute("len").EvaluateInt(instance);
}
catch (OverflowException)
{
throw new LoadDataException("Blob size is larger than Int32");
}
if (offset + len > reader.BaseStream.Length)
{
throw new LoadDataException("Blob size " + len + " exceeds stream length");
}
if (len < 0)
{
throw new LoadDataException("Blob size " + len + " is negative");
}
var decodedSizeExpr = GetExpressionAttribute("decodedsize");
int decodedSize = decodedSizeExpr != null?decodedSizeExpr.EvaluateInt(instance) : -1;
string encoding = GetStringAttribute("encoding");
BlobDecoder blobDecoder = FindBlobEncoding(instance, encoding);
BlobCell cell = new BlobCell(this, reader.BaseStream, offset, len, blobDecoder, decodedSize);
instance.AddCell(cell, _hidden);
instance.RegisterCellSize(cell, len);
reader.BaseStream.Position += len;
StructDef structDef = GetStructAttribute("struct");
if (structDef != null)
{
instance.AddChildSeed(new BlobChildSeed(structDef, cell));
}
}
