public static bool Load(string filename, out ScriptContext context, ErrorManager errorHandler)
{
try
{
FileStream fs = new FileStream(filename, FileMode.Open);
return(Load(fs, out context, errorHandler));
}
catch (System.Exception e)
{
errorHandler.ByteCodeLogError("Log Error");
context = new ScriptContext();
return(false);
}
}
public static bool Load(Stream s, out ScriptContext context, ErrorManager errorHandler)
{
context = new ScriptContext();
context.hostFuncs = new List <HostFuncs>();
context.CallStack = new Stack <CallStack>();
s.Seek(0, SeekOrigin.Begin);
BinaryReader br = new BinaryReader(s);
Header header = new Header();
header.Magic = br.ReadString();
if (header.Magic != HeaderConst.Magic)
{
br.Close();
errorHandler.ByteCodeLogError("Bad Magic");
return(false);
}
// TODO: check for version number
header.MajorVersion = br.ReadByte();
header.MinorVersion = br.ReadByte();
header.InstructionsCount = br.ReadInt32();
header.PCStartIdx = br.ReadInt32();
header.StackSize = br.ReadInt32();
header.GlobalVarsSize = br.ReadInt32();
context.instrStream.StartPC = context.instrStream.PC = header.PCStartIdx;
context.instrStream.Instructions = new Instruction[header.InstructionsCount];
context.stack.Elements = new Value[header.StackSize];
context.stack.StackStartIdx = header.GlobalVarsSize;
context.stack.TopStackIdx = 0;
for (int i = 0; i < header.InstructionsCount; i++)
{
Instruction inst = new Instruction();
inst.OpCode = br.ReadInt32();
int valuesCount = br.ReadInt32();
if (valuesCount > 0)
{
inst.Values = new Value [valuesCount];
for (int j = 0; j < inst.Values.Length; j++)
{
OpType type = (OpType)br.ReadInt32();
inst.Values[j].Type = type;
switch (type)
{
case OpType.Int:
case OpType.AbsMemIdx:
case OpType.RelMemIdx:
case OpType.ArgMemIdx:
case OpType.InstrIdx:
case OpType.FuncIdx:
inst.Values[j].IntLiteral = br.ReadInt32();
break;
case OpType.Float:
inst.Values[j].FloatLiteral = br.ReadSingle();
break;
case OpType.String:
case OpType.HostAPICallString:
inst.Values[j].StringLiteral = br.ReadString();
break;
}
}
}
context.instrStream.Instructions[i] = inst;
}
int count = br.ReadInt32();
context.Funcs = new List <Function>();
Function newFunc = new Function();
for (int i = 0; i < count; i++)
{
newFunc.StartIdx = br.ReadInt32();
newFunc.frameSize = br.ReadInt32();
newFunc.argFrameSize = br.ReadInt32();
context.Funcs.Add(newFunc);
}
br.Close();
return(true);
}
