private static void ValidationChecks <T>(DBHeader header, out uint Build)
{
var attr = typeof(T).GetCustomAttribute(typeof(DBTableAttribute), false) as DBTableAttribute;
if (attr == null)
{
throw new NotSupportedException("Missing DBTableAttribute.");
}
if (attr.Build < (int)Expansion.Alpha)
{
throw new ArgumentException("Invalid Build Number.");
}
//No header - must be invalid
if (!header.IsTypeOf <DBHeader>())
{
throw new Exception("Unknown file type.");
}
if (!header.IsTypeOf <HTFX>() && (header.RecordCount == 0 || header.RecordSize == 0))
{
throw new Exception("File contains no records.");
}
Build = attr.Build;
}
private static DBEntry <T> Read <T>(FileStream stream, string dbFile, DBHeader counterpart = null) where T : class
{
FileName = dbFile;
stream.Position = 0;
using (var dbReader = new BinaryReader(stream, Encoding.UTF8))
{
DBHeader header = ReadHeader(dbReader, counterpart);
long pos = dbReader.BaseStream.Position;
ValidationChecks <T>(header, out uint build);
DBEntry <T> entry = new DBEntry <T>(header, dbFile, build);
if (entry.TableStructure == null)
{
throw new Exception("Definition missing.");
}
if (header.IsTypeOf <WDBC>() || header.IsTypeOf <WDB2>())
{
long stringTableStart = dbReader.BaseStream.Position += header.RecordCount * header.RecordSize;
Dictionary <int, string> StringTable = new StringTable().Read(dbReader, stringTableStart); //Get stringtable
dbReader.Scrub(pos);
ReadIntoTable(ref entry, dbReader, StringTable); //Read data
stream.Dispose();
return(entry);
}
else if (header.IsTypeOf <WDB5>() || header.IsTypeOf <WCH5>() || header.IsTypeOf <WDB6>())
{
int CopyTableSize = header.CopyTableSize; //Only WDB5 has a copy table
uint CommonDataTableSize = header.CommonDataTableSize; //Only WDB6 has a CommonDataTable
//StringTable - only if applicable
long copyTablePos = dbReader.BaseStream.Length - CommonDataTableSize - CopyTableSize;
long indexTablePos = copyTablePos - (header.HasIndexTable ? header.RecordCount * 4 : 0);
long wch7TablePos = indexTablePos - (header.UnknownWCH7 * 4);
long stringTableStart = wch7TablePos - header.StringBlockSize;
Dictionary <int, string> StringTable = new Dictionary <int, string>();
if (!header.HasOffsetTable) //Stringtable is only present if there isn't an offset map
{
dbReader.Scrub(stringTableStart);
StringTable = new StringTable().Read(dbReader, stringTableStart, stringTableStart + header.StringBlockSize);
dbReader.Scrub(pos);
}
//Read the data
using (MemoryStream ms = new MemoryStream(header.ReadData(dbReader, pos, entry.Build)))
using (BinaryReader dataReader = new BinaryReader(ms, Encoding.UTF8))
{
ReadIntoTable(ref entry, dataReader, StringTable);
}
//Cleanup
header.OffsetLengths = null;
stream.Dispose();
return(entry);
}
else if (header.IsTypeOf <WDB>())
{
WDB wdb = (WDB)header;
using (MemoryStream ms = new MemoryStream(wdb.ReadData(dbReader)))
using (BinaryReader dataReader = new BinaryReader(ms, Encoding.UTF8))
{
ReadIntoTable(ref entry, dataReader, new Dictionary <int, string>());
}
stream.Dispose();
return(entry);
}
else if (header.IsTypeOf <HTFX>())
{
HTFX htfx = (HTFX)header;
using (MemoryStream ms = new MemoryStream(htfx.ReadData(counterpart as WDB6)))
using (BinaryReader dataReader = new BinaryReader(ms, Encoding.UTF8))
{
ReadIntoTable(ref entry, dataReader, new Dictionary <int, string>());
}
stream.Dispose();
return(entry);
}
else
{
stream.Dispose();
throw new Exception($"Invalid filetype.");
}
}
}
