private static Metadata readMetadataTable(FileStream metadataStream, int offset)
{
MetadataTableInfo info = readMetadataTableInfo(metadataStream, offset);
List<Tuple<int, byte[]>> table = new List<Tuple<int, byte[]>>();
int offs_acc = info.tableOffset.value;
for(int i=0; i<info.numEntries; i++)
{
table.Add(readMetadataEntry(metadataStream, offs_acc));
offs_acc += metadataStream.ReadInt(offs_acc) + 4;
offs_acc = HexTools.align(offs_acc); //word align
}
Metadata ret = new Metadata();
ret.data = table;
ret.info = info;
return ret;
}
private static MetadataTableInfo readMetadataTableInfo(FileStream metadataStream, int offset)
{
MetadataTableInfo info = new MetadataTableInfo();
info.identifier = metadataStream.ReadASCII(offset, IDENTIFIER_LENGTH);
info.tableOffset = new Pointer(metadataStream.ReadData(offset + IDENTIFIER_LENGTH, 4));
info.numEntries = metadataStream.ReadInt(offset + 4 + IDENTIFIER_LENGTH);
info.totalLength = metadataStream.ReadInt(offset + 8 + IDENTIFIER_LENGTH);
return info;
}
/*public byte[] getAt(int offset, int length)
{
//Returns [offset, offset+length)
}
public byte[] getDereferenceOf(int offset, int length)
{
//Returns [*offset, *offset+length)
}*/
private static Tuple<int, byte[]> readMetadataEntry(FileStream metadataStream, int offset)
{
//Returns [*(offset+4), *(offset+4)+*offset)
return Tuple.Create(metadataStream.ReadInt(offset),
metadataStream.ReadData(offset + 4, metadataStream.ReadInt(offset)));
}