public int ReadSizeT()
{
if (SizeOfSizeT <= 0)
{
throw new Exception("sizeof(size_t) is not valid:" + SizeOfSizeT);
}
var bytes = ReadBytes(SizeOfSizeT);
UInt64 ret;
switch (SizeOfSizeT)
{
case 4:
ret = BitConverter.ToUInt32(bytes, 0);
break;
case 8:
ret = BitConverter.ToUInt64(bytes, 0);
break;
default:
throw new NotImplementedException();
}
#if DEBUG_BINARY_READER
ULDebug.Log("ReadSizeT: " + ret);
#endif
if (ret > Int32.MaxValue)
{
throw new NotImplementedException();
}
return((int)ret);
}
private void LoadConstants(LuaProto proto)
{
int n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("Load Constants:" + n);
#endif
proto.K.Clear();
for (int i = 0; i < n; ++i)
{
int t = (int)LoadByte();
#if DEBUG_UNDUMP
ULDebug.Log("Constant Type:" + t);
#endif
StkId v = new StkId();
switch (t)
{
case (int)LuaType.LUA_TNIL:
v.V.SetNilValue();
proto.K.Add(v);
break;
case (int)LuaType.LUA_TBOOLEAN:
v.V.SetBValue(LoadBoolean());
proto.K.Add(v);
break;
case (int)LuaType.LUA_TNUMBER:
v.V.SetNValue(LoadNumber());
proto.K.Add(v);
break;
case (int)LuaType.LUA_TSTRING:
#if DEBUG_UNDUMP
ULDebug.Log("LuaType.LUA_TSTRING");
#endif
v.V.SetSValue(LoadString());
proto.K.Add(v);
break;
default:
throw new UndumpException(
"LoadConstants unknown type: " + t);
}
}
n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("Load Functions:" + n);
#endif
proto.P.Clear();
for (int i = 0; i < n; ++i)
{
proto.P.Add(LoadFunction());
}
}
public int ReadInt()
{
byte[] bytes = ReadBytes(4);
int ret = BitConverter.ToInt32(bytes, 0);
#if DEBUG_BINARY_READER
ULDebug.Log("ReadInt: " + ret);
#endif
return(ret);
}
public double ReadDouble()
{
var bytes = ReadBytes(8);
double ret = BitConverter.ToDouble(bytes, 0);
#if DEBUG_BINARY_READER
ULDebug.Log("ReadDouble: " + ret);
#endif
return(ret);
}
public uint ReadUInt()
{
var bytes = ReadBytes(4);
uint ret = BitConverter.ToUInt32(bytes, 0);
#if DEBUG_BINARY_READER
ULDebug.Log("ReadUInt: " + ret);
#endif
return(ret);
}
public virtual bool IsExistsFile(string filename)
{
try
{
return(File.Exists(GetFilePath(filename)));
}
catch (System.Exception ex)
{
ULDebug.LogError(ex.ToString());
return(false);
}
}
private LuaUpvalue F_FindUpval(StkId level)
{
#if DEBUG_FIND_UPVALUE
ULDebug.Log("[F_FindUpval] >>>>>>>>>>>>>>>>>>>> level:" + level);
#endif
LinkedListNode <LuaUpvalue> node = OpenUpval.First;
LinkedListNode <LuaUpvalue> prev = null;
while (node != null)
{
LuaUpvalue upval = node.Value;
#if DEBUG_FIND_UPVALUE
ULDebug.Log("[F_FindUpval] >>>>>>>>>>>>>>>>>>>> upval.V:" + upval.V);
#endif
if (upval.V.Index < level.Index)
{
break;
}
LinkedListNode <LuaUpvalue> next = node.Next;
if (upval.V == level)
{
return(upval);
}
prev = node;
node = next;
}
// not found: create a new one
LuaUpvalue ret = new LuaUpvalue();
ret.V = level;
// ret.Prev = G.UpvalHead;
// ret.Next = G.UpvalHead.Next;
// ret.Next.Prev = ret;
// G.UpvalHead.Next = ret;
if (prev == null)
{
OpenUpval.AddFirst(ret);
}
else
{
OpenUpval.AddAfter(prev, ret);
}
#if DEBUG_FIND_UPVALUE
ULDebug.Log("[F_FindUpval] >>>>>>>>>>>>>>>>>>>> create new one:" + ret.V);
#endif
return(ret);
}
public byte ReadByte()
{
var c = LoadInfo.ReadByte();
if (c == -1)
{
throw new UndumpException("truncated");
}
#if DEBUG_BINARY_READER
ULDebug.Log("ReadBytes: " + c);
#endif
return((byte)c);
}
private static int FFI_AddAssembly(ILuaState lua)
{
var name = lua.ToString(1);
Assembly assembly = assembly = Assembly.Load(name);
if (assembly != null)
{
AssemblyList.Add(assembly);
}
else
{
ULDebug.LogError("assembly not found:" + name);
}
return(0);
}
private void LoadHeader()
{
byte[] header = LoadBytes(4 // Signature
+ 8 // version, format version, size of int ... etc
+ 6 // Tail
);
byte v = header[4 /* skip signature */
+ 4 /* offset of sizeof(size_t) */
];
#if DEBUG_UNDUMP
ULDebug.Log(string.Format("sizeof(size_t): {0}", v));
#endif
Reader.SizeOfSizeT = v;
}
private void LoadUpvalues(LuaProto proto)
{
int n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("Load Upvalues:" + n);
#endif
proto.Upvalues.Clear();
for (int i = 0; i < n; ++i)
{
UpvalDesc upvalDesc = new UpvalDesc();
upvalDesc.Name = null;
upvalDesc.InStack = LoadBoolean();
upvalDesc.Index = (int)LoadByte();
proto.Upvalues.Add(upvalDesc);
}
}
private void LoadCode(LuaProto proto)
{
int n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("LoadCode n:" + n);
#endif
proto.Code.Clear();
for (int i = 0; i < n; ++i)
{
proto.Code.Add(LoadInstruction());
#if DEBUG_UNDUMP
ULDebug.Log("Count:" + proto.Code.Count);
ULDebug.Log("LoadInstruction:" + proto.Code[proto.Code.Count - 1]);
#endif
}
}
public virtual MemoryStream ReadFile(string filename)
{
try
{
string filePath = GetFilePath(filename);
FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
file.Seek(0, SeekOrigin.Begin);
byte[] buffer = new byte[file.Length];
file.Read(buffer, 0, buffer.Length);
file.Close();
return(new MemoryStream(buffer));
}
catch (System.Exception ex)
{
ULDebug.LogError(ex.ToString());
return(new MemoryStream());
}
}
private void DumpParts()
{
ULDebug.Log("------------------ [DumpParts] enter -----------------------");
ULDebug.Log("<< Array Part >>");
for (var i = 0; i < ArrayPart.Length; ++i)
{
var n = ArrayPart[i];
ULDebug.Log(string.Format("i:{0} val:{1}", i, n.V));
}
ULDebug.Log("<< Hash Part >>");
for (var i = 0; i < HashPart.Length; ++i)
{
var n = HashPart[i];
var next = (n.Next == null) ? -1 : n.Next.Index;
ULDebug.Log(string.Format("i:{0} index:{1} key:{2} val:{3} next:{4}", i, n.Index, n.Key.V, n.Val.V, next));
}
ULDebug.Log("++++++++++++++++++ [DumpParts] leave +++++++++++++++++++++++");
}
private LuaProto LoadFunction()
{
#if DEBUG_UNDUMP
ULDebug.Log("LoadFunction enter");
#endif
LuaProto proto = new LuaProto();
proto.LineDefined = LoadInt();
proto.LastLineDefined = LoadInt();
proto.NumParams = LoadByte();
proto.IsVarArg = LoadBoolean();
proto.MaxStackSize = LoadByte();
LoadCode(proto);
LoadConstants(proto);
LoadUpvalues(proto);
LoadDebug(proto);
return(proto);
}
private static int FFI_AddAssembly(ILuaState lua)
{
var name = lua.ToString(1);
#if NETFX_CORE && UNITY_METRO && !UNITY_EDITOR
var assembly = Assembly.Load(new AssemblyName(name));
#else
var assembly = Assembly.Load(name);
#endif
if (assembly != null)
{
AssemblyList.Add(assembly);
}
else
{
ULDebug.LogError("assembly not found:" + name);
}
return(0);
}
public string ReadString()
{
var n = ReadSizeT();
if (n == 0)
{
return(null);
}
var bytes = ReadBytes(n);
// n=1: removing trailing '\0'
string ret = System.Text.Encoding.UTF8.GetString(bytes, 0, n - 1);
#if DEBUG_BINARY_READER
ULDebug.Log("ReadString n:" + n + " ret:" + ret);
#endif
return(ret);
}
private void LoadDebug(LuaProto proto)
{
int n;
proto.Source = LoadString();
// LineInfo
n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("Load LineInfo:" + n);
#endif
proto.LineInfo.Clear();
for (int i = 0; i < n; ++i)
{
proto.LineInfo.Add(LoadInt());
}
// LocalVar
n = LoadInt();
#if DEBUG_UNDUMP
ULDebug.Log("Load LocalVar:" + n);
#endif
proto.LocVars.Clear();
for (int i = 0; i < n; ++i)
{
LocVar locVar = new LocVar();
locVar.VarName = LoadString();
locVar.StartPc = LoadInt();
locVar.EndPc = LoadInt();
proto.LocVars.Add(locVar);
}
// Upvalues' name
n = LoadInt();
for (int i = 0; i < n; ++i)
{
proto.Upvalues[i].Name = LoadString();
}
}
public byte[] ReadBytes(int count)
{
byte[] ret = new byte[count];
for (int i = 0; i < count; ++i)
{
var c = LoadInfo.ReadByte();
if (c == -1)
{
throw new UndumpException("truncated");
}
ret[i] = (byte)c;
}
#if DEBUG_BINARY_READER
var sb = new System.Text.StringBuilder();
sb.Append("ReadBytes:");
for (var i = 0; i < ret.Length; ++i)
{
sb.Append(string.Format(" {0:X02}", ret[i]));
}
ULDebug.Log(sb.ToString());
#endif
return(ret);
}
private void V_NotImplemented(Instruction i)
{
ULDebug.LogError("[VM] ==================================== Not Implemented Instruction: " + i);
// throw new NotImplementedException();
}
private void V_Execute()
{
ExecuteEnvironment env;
CallInfo ci = CI;
newframe:
Utl.Assert(ci == CI);
var cl = Stack[ci.FuncIndex].V.ClLValue();
env.Stack = Stack;
env.K = cl.Proto.K;
env.Base = ci.BaseIndex;
#if DEBUG_NEW_FRAME
ULDebug.Log("#### NEW FRAME #########################################################################");
ULDebug.Log("## cl:" + cl);
ULDebug.Log("## Base:" + env.Base);
ULDebug.Log("########################################################################################");
#endif
while (true)
{
Instruction i = ci.SavedPc.ValueInc;
env.I = i;
#if DEBUG_SRC_INFO
int line = 0;
string src = "";
if (ci.IsLua)
{
line = GetCurrentLine(ci);
src = GetCurrentLuaFunc(ci).Proto.Source;
}
#endif
StkId ra = env.RA;
#if DEBUG_DUMP_INS_STACK
#if DEBUG_DUMP_INS_STACK_EX
DumpStack(env.Base, i.ToString());
#else
DumpStack(env.Base);
#endif
#endif
#if DEBUG_INSTRUCTION
ULDebug.Log(System.DateTime.Now + " [VM] ======================================================================== Instruction: " + i
#if DEBUG_INSTRUCTION_WITH_STACK
+ "\n" + DumpStackToString(env.Base.Index)
#endif
);
#endif
#if DEBUG_RECORD_INS
InstructionHistory.Enqueue(i);
if (InstructionHistory.Count > 100)
{
InstructionHistory.Dequeue();
}
#endif
switch (i.GET_OPCODE())
{
case OpCode.OP_MOVE:
{
var rb = env.RB;
#if DEBUG_OP_MOVE
ULDebug.Log("[VM] ==== OP_MOVE rb:" + rb);
ULDebug.Log("[VM] ==== OP_MOVE ra:" + ra);
#endif
ra.V.SetObj(ref rb.V);
break;
}
case OpCode.OP_LOADK:
{
var rb = env.K[i.GETARG_Bx()];
ra.V.SetObj(ref rb.V);
break;
}
case OpCode.OP_LOADKX:
{
Utl.Assert(ci.SavedPc.Value.GET_OPCODE() == OpCode.OP_EXTRAARG);
var rb = env.K[ci.SavedPc.ValueInc.GETARG_Ax()];
ra.V.SetObj(ref rb.V);
break;
}
case OpCode.OP_LOADBOOL:
{
ra.V.SetBValue(i.GETARG_B() != 0);
if (i.GETARG_C() != 0)
{
ci.SavedPc.Index += 1; // skip next instruction (if C)
}
break;
}
case OpCode.OP_LOADNIL:
{
int b = i.GETARG_B();
int index = ra.Index;
do
{
Stack[index++].V.SetNilValue();
} while (b-- > 0);
break;
}
case OpCode.OP_GETUPVAL:
{
int b = i.GETARG_B();
ra.V.SetObj(ref cl.Upvals[b].V.V);
#if DEBUG_OP_GETUPVAL
// for( var j=0; j<cl.Upvals.Length; ++j)
// {
// ULDebug.Log("[VM] ==== GETUPVAL upval:" + cl.Upvals[j] );
// }
ULDebug.Log("[VM] ==== GETUPVAL b:" + b);
ULDebug.Log("[VM] ==== GETUPVAL ra:" + ra);
#endif
break;
}
case OpCode.OP_GETTABUP:
{
int b = i.GETARG_B();
var key = env.RKC;
V_GetTable(cl.Upvals[b].V, key, ra);
#if DEBUG_OP_GETTABUP
ULDebug.Log("[VM] ==== OP_GETTABUP key:" + key);
ULDebug.Log("[VM] ==== OP_GETTABUP val:" + ra);
#endif
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_GETTABLE:
{
var tbl = env.RB;
var key = env.RKC;
var val = ra;
V_GetTable(tbl, key, val);
#if DEBUG_OP_GETTABLE
ULDebug.Log("[VM] ==== OP_GETTABLE key:" + key.ToString());
ULDebug.Log("[VM] ==== OP_GETTABLE val:" + val.ToString());
#endif
break;
}
case OpCode.OP_SETTABUP:
{
int a = i.GETARG_A();
var key = env.RKB;
var val = env.RKC;
V_SetTable(cl.Upvals[a].V, key, val);
#if DEBUG_OP_SETTABUP
ULDebug.Log("[VM] ==== OP_SETTABUP key:" + key.Value);
ULDebug.Log("[VM] ==== OP_SETTABUP val:" + val.Value);
#endif
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_SETUPVAL:
{
int b = i.GETARG_B();
var uv = cl.Upvals[b];
uv.V.V.SetObj(ref ra.V);
#if DEBUG_OP_SETUPVAL
ULDebug.Log("[VM] ==== SETUPVAL b:" + b);
ULDebug.Log("[VM] ==== SETUPVAL ra:" + ra);
#endif
break;
}
case OpCode.OP_SETTABLE:
{
var key = env.RKB;
var val = env.RKC;
#if DEBUG_OP_SETTABLE
ULDebug.Log("[VM] ==== OP_SETTABLE key:" + key.ToString());
ULDebug.Log("[VM] ==== OP_SETTABLE val:" + val.ToString());
#endif
V_SetTable(ra, key, val);
break;
}
case OpCode.OP_NEWTABLE:
{
int b = i.GETARG_B();
int c = i.GETARG_C();
var tbl = new LuaTable(this);
ra.V.SetHValue(tbl);
if (b > 0 || c > 0)
{
tbl.Resize(b, c);
}
break;
}
case OpCode.OP_SELF:
{
// OP_SELF put function referenced by a table on ra
// and the table on ra+1
//
// RB: table
// RKC: key
var ra1 = Stack[ra.Index + 1];
var rb = env.RB;
ra1.V.SetObj(ref rb.V);
V_GetTable(rb, env.RKC, ra);
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_ADD:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(rkb.V.NValue + rkc.V.NValue);
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_ADD);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_SUB:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(rkb.V.NValue - rkc.V.NValue);
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_SUB);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_MUL:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(rkb.V.NValue * rkc.V.NValue);
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_MUL);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_DIV:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(rkb.V.NValue / rkc.V.NValue);
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_DIV);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_MOD:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(Utl.LuaMod(rkb.V.NValue, rkc.V.NValue));
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_MOD);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_POW:
{
var rkb = env.RKB;
var rkc = env.RKC;
if (rkb.V.TtIsNumber() && rkc.V.TtIsNumber())
{
ra.V.SetNValue(Math.Pow(rkb.V.NValue, rkc.V.NValue));
}
else
{
V_Arith(ra, rkb, rkc, TMS.TM_POW);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_UNM:
{
var rb = env.RB;
if (rb.V.TtIsNumber())
{
ra.V.SetNValue(-rb.V.NValue);
}
else
{
V_Arith(ra, rb, rb, TMS.TM_UNM);
env.Base = ci.BaseIndex;
}
break;
}
case OpCode.OP_NOT:
{
var rb = env.RB;
ra.V.SetBValue(IsFalse(ref rb.V));
break;
}
case OpCode.OP_LEN:
{
V_ObjLen(ra, env.RB);
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_CONCAT:
{
int b = i.GETARG_B();
int c = i.GETARG_C();
Top = Stack[env.Base + c + 1];
V_Concat(c - b + 1);
env.Base = ci.BaseIndex;
ra = env.RA; // 'V_Concat' may invoke TMs and move the stack
StkId rb = env.RB;
ra.V.SetObj(ref rb.V);
Top = Stack[ci.TopIndex]; // restore top
break;
}
case OpCode.OP_JMP:
{
V_DoJump(ci, i, 0);
break;
}
case OpCode.OP_EQ:
{
var lhs = env.RKB;
var rhs = env.RKC;
var expectEq = i.GETARG_A() != 0;
#if DEBUG_OP_EQ
ULDebug.Log("[VM] ==== OP_EQ lhs:" + lhs);
ULDebug.Log("[VM] ==== OP_EQ rhs:" + rhs);
ULDebug.Log("[VM] ==== OP_EQ expectEq:" + expectEq);
ULDebug.Log("[VM] ==== OP_EQ (lhs.V == rhs.V):" + (lhs.V == rhs.V));
#endif
if ((lhs.V == rhs.V) != expectEq)
{
ci.SavedPc.Index += 1; // skip next jump instruction
}
else
{
V_DoNextJump(ci);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_LT:
{
var expectCmpResult = i.GETARG_A() != 0;
if (V_LessThan(env.RKB, env.RKC) != expectCmpResult)
{
ci.SavedPc.Index += 1;
}
else
{
V_DoNextJump(ci);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_LE:
{
var expectCmpResult = i.GETARG_A() != 0;
if (V_LessEqual(env.RKB, env.RKC) != expectCmpResult)
{
ci.SavedPc.Index += 1;
}
else
{
V_DoNextJump(ci);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_TEST:
{
if ((i.GETARG_C() != 0) ?
IsFalse(ref ra.V) : !IsFalse(ref ra.V))
{
ci.SavedPc.Index += 1;
}
else
{
V_DoNextJump(ci);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_TESTSET:
{
var rb = env.RB;
if ((i.GETARG_C() != 0) ?
IsFalse(ref rb.V) : !IsFalse(ref rb.V))
{
ci.SavedPc.Index += 1;
}
else
{
ra.V.SetObj(ref rb.V);
V_DoNextJump(ci);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_CALL:
{
int b = i.GETARG_B();
int nresults = i.GETARG_C() - 1;
if (b != 0)
{
Top = Stack[ra.Index + b];
} // else previous instruction set top
if (D_PreCall(ra, nresults)) // C# function?
{
if (nresults >= 0)
{
Top = Stack[ci.TopIndex];
}
env.Base = ci.BaseIndex;
}
else // Lua function
{
ci = CI;
ci.CallStatus |= CallStatus.CIST_REENTRY;
goto newframe;
}
break;
}
case OpCode.OP_TAILCALL:
{
int b = i.GETARG_B();
if (b != 0)
{
Top = Stack[ra.Index + b];
} // else previous instruction set top
Utl.Assert(i.GETARG_C() - 1 == LuaDef.LUA_MULTRET);
var called = D_PreCall(ra, LuaDef.LUA_MULTRET);
// C# function ?
if (called)
{
env.Base = ci.BaseIndex;
}
// LuaFunciton
else
{
var nci = CI; // called frame
var oci = BaseCI[CI.Index - 1]; // caller frame
StkId nfunc = Stack[nci.FuncIndex]; // called function
StkId ofunc = Stack[oci.FuncIndex]; // caller function
var ncl = nfunc.V.ClLValue();
var ocl = ofunc.V.ClLValue();
// last stack slot filled by 'precall'
int lim = nci.BaseIndex + ncl.Proto.NumParams;
if (cl.Proto.P.Count > 0)
{
F_Close(Stack[env.Base]);
}
// move new frame into old one
var nindex = nfunc.Index;
var oindex = ofunc.Index;
while (nindex < lim)
{
Stack[oindex++].V.SetObj(ref Stack[nindex++].V);
}
oci.BaseIndex = ofunc.Index + (nci.BaseIndex - nfunc.Index);
oci.TopIndex = ofunc.Index + (Top.Index - nfunc.Index);
Top = Stack[oci.TopIndex];
oci.SavedPc = nci.SavedPc;
oci.CallStatus |= CallStatus.CIST_TAIL;
ci = CI = oci;
ocl = ofunc.V.ClLValue();
Utl.Assert(Top.Index == oci.BaseIndex + ocl.Proto.MaxStackSize);
goto newframe;
}
break;
}
case OpCode.OP_RETURN:
{
int b = i.GETARG_B();
if (b != 0)
{
Top = Stack[ra.Index + b - 1];
}
if (cl.Proto.P.Count > 0)
{
F_Close(Stack[env.Base]);
}
b = D_PosCall(ra.Index);
if ((ci.CallStatus & CallStatus.CIST_REENTRY) == 0)
{
return;
}
else
{
ci = CI;
if (b != 0)
{
Top = Stack[ci.TopIndex];
}
goto newframe;
}
}
case OpCode.OP_FORLOOP:
{
var ra1 = Stack[ra.Index + 1];
var ra2 = Stack[ra.Index + 2];
var ra3 = Stack[ra.Index + 3];
var step = ra2.V.NValue;
var idx = ra.V.NValue + step; // increment index
var limit = ra1.V.NValue;
if ((0 < step) ? idx <= limit
: limit <= idx)
{
ci.SavedPc.Index += i.GETARG_sBx(); // jump back
ra.V.SetNValue(idx); // updateinternal index...
ra3.V.SetNValue(idx); // ... and external index
}
break;
}
case OpCode.OP_FORPREP:
{
var init = new TValue();
var limit = new TValue();
var step = new TValue();
var ra1 = Stack[ra.Index + 1];
var ra2 = Stack[ra.Index + 2];
// WHY: why limit is not used ?
if (!V_ToNumber(ra, ref init))
{
G_RunError("'for' initial value must be a number");
}
if (!V_ToNumber(ra1, ref limit))
{
G_RunError("'for' limit must be a number");
}
if (!V_ToNumber(ra2, ref step))
{
G_RunError("'for' step must be a number");
}
ra.V.SetNValue(init.NValue - step.NValue);
ci.SavedPc.Index += i.GETARG_sBx();
break;
}
case OpCode.OP_TFORCALL:
{
int rai = ra.Index;
int cbi = ra.Index + 3;
Stack[cbi + 2].V.SetObj(ref Stack[rai + 2].V);
Stack[cbi + 1].V.SetObj(ref Stack[rai + 1].V);
Stack[cbi].V.SetObj(ref Stack[rai].V);
StkId callBase = Stack[cbi];
Top = Stack[cbi + 3]; // func. +2 args (state and index)
D_Call(callBase, i.GETARG_C(), true);
env.Base = ci.BaseIndex;
Top = Stack[ci.TopIndex];
i = ci.SavedPc.ValueInc; // go to next instruction
env.I = i;
ra = env.RA;
DumpStack(env.Base);
#if DEBUG_INSTRUCTION
ULDebug.Log("[VM] ============================================================ OP_TFORCALL Instruction: " + i);
#endif
Utl.Assert(i.GET_OPCODE() == OpCode.OP_TFORLOOP);
goto l_tforloop;
}
case OpCode.OP_TFORLOOP:
l_tforloop:
{
StkId ra1 = Stack[ra.Index + 1];
if (!ra1.V.TtIsNil()) // continue loop?
{
ra.V.SetObj(ref ra1.V);
ci.SavedPc += i.GETARG_sBx();
}
break;
}
// sets the values for a range of array elements in a table(RA)
// RA -> table
// RB -> number of elements to set
// C -> encodes the block number of the table to be initialized
// the values used to initialize the table are located in
// R(A+1), R(A+2) ...
case OpCode.OP_SETLIST:
{
int n = i.GETARG_B();
int c = i.GETARG_C();
if (n == 0)
{
n = (Top.Index - ra.Index) - 1;
}
if (c == 0)
{
Utl.Assert(ci.SavedPc.Value.GET_OPCODE() == OpCode.OP_EXTRAARG);
c = ci.SavedPc.ValueInc.GETARG_Ax();
}
var tbl = ra.V.HValue();
Utl.Assert(tbl != null);
int last = ((c - 1) * LuaDef.LFIELDS_PER_FLUSH) + n;
int rai = ra.Index;
for (; n > 0; --n)
{
tbl.SetInt(last--, ref Stack[rai + n].V);
}
#if DEBUG_OP_SETLIST
ULDebug.Log("[VM] ==== OP_SETLIST ci.Top:" + ci.Top.Index);
ULDebug.Log("[VM] ==== OP_SETLIST Top:" + Top.Index);
#endif
Top = Stack[ci.TopIndex]; // correct top (in case of previous open call)
break;
}
case OpCode.OP_CLOSURE:
{
LuaProto p = cl.Proto.P[i.GETARG_Bx()];
V_PushClosure(p, cl.Upvals, env.Base, ra);
#if DEBUG_OP_CLOSURE
ULDebug.Log("OP_CLOSURE:" + ra.Value);
var racl = ra.Value as LuaLClosure;
if (racl != null)
{
for (int ii = 0; ii < racl.Upvals.Count; ++ii)
{
ULDebug.Log(ii + " ) " + racl.Upvals[ii]);
}
}
#endif
break;
}
/// <summary>
/// VARARG implements the vararg operator `...' in expressions.
/// VARARG copies B-1 parameters into a number of registers
/// starting from R(A), padding with nils if there aren't enough values.
/// If B is 0, VARARG copies as many values as it can based on
/// the number of parameters passed.
/// If a fixed number of values is required, B is a value greater than 1.
/// If any number of values is required, B is 0.
/// </summary>
case OpCode.OP_VARARG:
{
int b = i.GETARG_B() - 1;
int n = (env.Base - ci.FuncIndex) - cl.Proto.NumParams - 1;
if (b < 0) // B == 0?
{
b = n;
D_CheckStack(n);
ra = env.RA; // previous call may change the stack
Top = Stack[ra.Index + n];
}
var p = ra.Index;
var q = env.Base - n;
for (int j = 0; j < b; ++j)
{
if (j < n)
{
Stack[p++].V.SetObj(ref Stack[q++].V);
}
else
{
Stack[p++].V.SetNilValue();
}
}
break;
}
case OpCode.OP_EXTRAARG:
{
Utl.Assert(false);
V_NotImplemented(i);
break;
}
default:
V_NotImplemented(i);
break;
}
}
}
public void DumpStack(int baseIndex, string tag)
{
#if ENABLE_DUMP_STACK
ULDebug.Log(DumpStackToString(baseIndex, tag));
#endif
}