public T GetField <T>(int field, int arrayIndex = 0)
{
DB2_Meta meta = reader.Meta[field];
if (meta.Bits != 0x00 && meta.Bits != 0x08 && meta.Bits != 0x10 && meta.Bits != 0x18 && meta.Bits != -32)
{
throw new Exception("Unknown meta.Flags");
}
int bytesCount = (32 - meta.Bits) >> 3;
TypeCode code = Type.GetTypeCode(typeof(T));
object value = null;
switch (code)
{
case TypeCode.Byte:
if (meta.Bits != 0x18)
{
throw new Exception("TypeCode.Byte Unknown meta.Bits");
}
value = data[meta.Offset + bytesCount * arrayIndex];
break;
case TypeCode.SByte:
if (meta.Bits != 0x18)
{
throw new Exception("TypeCode.SByte Unknown meta.Bits");
}
value = (sbyte)data[meta.Offset + bytesCount * arrayIndex];
break;
case TypeCode.Int16:
if (meta.Bits != 0x10)
{
throw new Exception("TypeCode.Int16 Unknown meta.Bits");
}
value = BitConverter.ToInt16(data, meta.Offset + bytesCount * arrayIndex);
break;
case TypeCode.UInt16:
if (meta.Bits != 0x10)
{
throw new Exception("TypeCode.UInt16 Unknown meta.Bits");
}
value = BitConverter.ToUInt16(data, meta.Offset + bytesCount * arrayIndex);
break;
case TypeCode.Int32:
byte[] b1 = new byte[4];
Array.Copy(data, meta.Offset + bytesCount * arrayIndex, b1, 0, bytesCount);
value = BitConverter.ToInt32(b1, 0);
break;
case TypeCode.UInt32:
byte[] b2 = new byte[4];
Array.Copy(data, meta.Offset + bytesCount * arrayIndex, b2, 0, bytesCount);
value = BitConverter.ToUInt32(b2, 0);
break;
case TypeCode.Int64:
byte[] b3 = new byte[8];
Array.Copy(data, meta.Offset + bytesCount * arrayIndex, b3, 0, bytesCount);
value = BitConverter.ToInt64(b3, 0);
break;
case TypeCode.UInt64:
byte[] b4 = new byte[8];
Array.Copy(data, meta.Offset + bytesCount * arrayIndex, b4, 0, bytesCount);
value = BitConverter.ToUInt64(b4, 0);
break;
case TypeCode.String:
if (meta.Bits != 0x00)
{
throw new Exception("TypeCode.String Unknown meta.Bits");
}
byte[] b5 = new byte[4];
Array.Copy(data, meta.Offset + bytesCount * arrayIndex, b5, 0, bytesCount);
int start = BitConverter.ToInt32(b5, 0), len = 0;
while (reader.StringTable[start + len] != 0)
{
len++;
}
value = Encoding.UTF8.GetString(reader.StringTable, start, len);
break;
case TypeCode.Single:
if (meta.Bits != 0x00)
{
throw new Exception("TypeCode.Single Unknown meta.Bits");
}
value = BitConverter.ToSingle(data, meta.Offset + bytesCount * arrayIndex);
break;
default:
throw new Exception("Invalid TypeCode: " + code);
}
return((T)value);
}
public DB5_Reader(Stream stream)
{
using (var reader = new BinaryReader(stream, Encoding.UTF8))
{
if (reader.BaseStream.Length < HeaderSize)
{
throw new InvalidDataException("Corrupted DB5 file (header mis-match)");
}
if (reader.ReadUInt32() != Magic)
{
throw new InvalidDataException("Corrupted DB5 file (magic)");
}
RecordsCount = reader.ReadInt32();
FieldsCount = reader.ReadInt32();
RecordSize = reader.ReadInt32();
StringTableSize = reader.ReadInt32();
uint tableHash = reader.ReadUInt32();
uint layoutHash = reader.ReadUInt32();
MinIndex = reader.ReadInt32();
MaxIndex = reader.ReadInt32();
int locale = reader.ReadInt32();
int copyTableSize = reader.ReadInt32();
int flags = reader.ReadUInt16();
int index = reader.ReadUInt16();
bool isSparse = (flags & 0x1) != 0;
bool hasIndex = (flags & 0x4) != 0;
meta = new DB2_Meta[FieldsCount];
for (int i = 0; i < meta.Length; i++)
{
meta[i] = new DB2_Meta();
meta[i].Bits = reader.ReadInt16();
meta[i].Offset = reader.ReadInt16();
}
DB5_Row[] rows = new DB5_Row[RecordsCount];
for (int i = 0; i < RecordsCount; i++)
{
rows[i] = new DB5_Row(this, reader.ReadBytes(RecordSize));
}
stringTable = reader.ReadBytes(StringTableSize);
if (isSparse)
{
throw new Exception("Sparse table encountered!");
}
if (hasIndex)
{
for (int i = 0; i < RecordsCount; i++)
{
this.index[reader.ReadInt32()] = rows[i];
}
}
else
{
for (int i = 0; i < RecordsCount; i++)
{
int id = rows[i].Data.Skip(meta[index].Offset).Take((32 - this.meta[index].Bits) >> 3).Select((b, k) => b << k * 8).Sum();
this.index[id] = rows[i];
}
}
if (copyTableSize > 0)
{
// Duplicate existing entry as new one.
int count = copyTableSize / 8;
for (int i = 0; i < count; i++)
{
this.index[reader.ReadInt32()] = this.index[reader.ReadInt32()];
}
}
}
}
