public static DatToken Load(DatBinaryReader reader)
{
var tokenByte = reader.ReadByte();
if (Enum.IsDefined(typeof(DatTokenType), tokenByte) == false)
{
throw new Exception($"Unable to parse DatToken with id = {tokenByte}");
}
var token = new DatToken
{
TokenType = (DatTokenType)tokenByte
};
switch (token.TokenType)
{
case DatTokenType.Call:
case DatTokenType.CallExternal:
case DatTokenType.PushInt:
case DatTokenType.PushVar:
case DatTokenType.PushInstance:
case DatTokenType.Jump:
case DatTokenType.JumpIf:
case DatTokenType.SetInstance:
token.IntParam = reader.ReadInt32();
break;
case DatTokenType.PushArrayVar:
token.IntParam = reader.ReadInt32();
token.ByteParam = reader.ReadByte();
break;
}
return(token);
}
private void Load(Stream stream)
{
var reader = new DatBinaryReader(stream);
Version = reader.ReadChar();
Symbols = LoadSymbols(reader);
Tokens = LoadTokens(reader);
}
private IEnumerable <DatToken> LoadTokens(DatBinaryReader reader)
{
int stackLength = reader.ReadInt32();
List <DatToken> result = new List <DatToken>();
while (stackLength > 0)
{
var token = DatToken.Load(reader);
result.Add(token);
stackLength -= token.Size;
}
return(result);
}
private IEnumerable <DatSymbol> LoadSymbols(DatBinaryReader reader)
{
var symbolsCount = reader.ReadInt32();
var symbolsOrder = new int[symbolsCount];
for (int i = 0; i < symbolsCount; i++)
{
symbolsOrder[i] = reader.ReadInt32();
}
var symbols = new DatSymbol[symbolsCount];
for (int i = 0; i < symbolsCount; i++)
{
symbols[i] = DatSymbol.Load(reader);
}
return(symbols);
}
private static object[] GetContentIfExists(DatBinaryReader reader, DatSymbol symbol)
{
// TODO : Verify and refactor this method.
object[] result = null;
if (symbol.Flags.HasFlag(DatSymbolFlag.Classvar) == false)
{
if (symbol.Type == DatSymbolType.Func || symbol.Type == DatSymbolType.Class || symbol.Type == DatSymbolType.Prototype)
{
result = new object[1];
}
else
{
result = new object[symbol.ArrayLength];
}
if ((result.Length == 0) && (symbol.Type == DatSymbolType.Instance))
{
result = new object[1];
}
for (int i = 0; i < result.Length; i++)
{
switch (symbol.Type)
{
case DatSymbolType.String:
result[i] = reader.ReadString();
break;
case DatSymbolType.Float:
result[i] = reader.ReadSingle();
break;
default:
result[i] = reader.ReadInt32();
break;
}
}
}
return(result);
}
private List <DatSymbol> LoadDatSymbols(DatBinaryReader reader)
{
_nextSymbolIndex = 0;
var symbolsCount = reader.ReadInt32();
var symbolsOrder = new int[symbolsCount];
for (int i = 0; i < symbolsCount; i++)
{
symbolsOrder[i] = reader.ReadInt32();
}
List <DatSymbol> symbols = new List <DatSymbol>();
for (int i = 0; i < symbolsCount; i++)
{
DatSymbol symbol = new DatSymbol(reader)
{
Index = _nextSymbolIndex
};
symbols.Add(symbol);
_nextSymbolIndex++;
}
return(symbols);
}
/// <summary>
/// Creates DatSymbol from binary (DAT formatted) stream
/// </summary>
public DatSymbol(DatBinaryReader reader)
{
var hasName = Convert.ToBoolean(reader.ReadUInt32());
if (hasName) // TODO is it even possible for symbol to not have name?
{
Name = reader.ReadString();
}
OffClsRet = reader.ReadUInt32();
uint bitField = reader.ReadUInt32();
Count = bitField & 0xFFF;
BuiltinType = (SymbolType)((bitField & 0xF000) >> 12);
Flags = (SymbolFlag)((bitField & 0x3F0000) >> 16);
FileIndex = reader.ReadUInt32();
Line = reader.ReadUInt32();
LinesCount = reader.ReadUInt32();
Column = reader.ReadUInt32();
CharsCount = reader.ReadUInt32();
Content = new object[] {};
if (!Flags.HasFlag(SymbolFlag.ClassVar))
{
switch (BuiltinType)
{
case SymbolType.Class:
case SymbolType.Func:
case SymbolType.Instance:
case SymbolType.Prototype:
Content = new object[] { reader.ReadInt32() };
break;
default:
Content = new object[Count];
for (int i = 0; i < Count; ++i)
{
switch (BuiltinType)
{
case SymbolType.String:
Content[i] = reader.ReadString();
break;
case SymbolType.Float:
Content[i] = reader.ReadSingle();
break;
default:
Content[i] = reader.ReadInt32();
break;
}
}
break;
}
}
ParentIndex = reader.ReadInt32();
}
/// <summary>
/// Loads DatSymbol from binary DAT formatted stream
/// </summary>
public static DatSymbol Load(DatBinaryReader reader)
{
var symbol = new DatSymbol();
// Read Name
var hasName = Convert.ToBoolean(reader.ReadUInt32());
if (hasName)
{
symbol.Name = reader.ReadString();
}
// Read ReturnType / ClassSize / ClassVarOffset / ArrayLength / Type / Flags
var valueField = reader.ReadInt32();
var bitField = reader.ReadUInt32();
symbol.ArrayLength = bitField & 0xFFF;
symbol.Type = (DatSymbolType)((bitField & 0xF000) >> 12);
symbol.Flags = (DatSymbolFlag)((bitField & 0x3F0000) >> 16);
if (symbol.Type == DatSymbolType.Func && symbol.Flags.HasFlag(DatSymbolFlag.Return))
{
symbol.ReturnType = (DatSymbolType)valueField;
}
if (symbol.Type == DatSymbolType.Class)
{
symbol.ClassSize = valueField;
}
if (symbol.Flags.HasFlag(DatSymbolFlag.Classvar))
{
symbol.ClassVarOffset = valueField;
}
symbol.Location = new DatSymbolLocation
{
FileNumber = reader.ReadInt32(),
Line = reader.ReadInt32(),
LinesCount = reader.ReadInt32(),
Position = reader.ReadInt32(),
PositionsCount = reader.ReadInt32(),
};
switch (symbol.Type)
{
case DatSymbolType.Class:
symbol.ClassOffset = reader.ReadInt32();
break;
case DatSymbolType.Func:
case DatSymbolType.Instance:
case DatSymbolType.Prototype:
symbol.FirstTokenAddress = reader.ReadInt32();
break;
default:
symbol.Content = GetContentIfExists(reader, symbol);
break;
}
symbol.ParentIndex = reader.ReadInt32();
return(symbol);
}
