private static void F_Load(ref LoadParameter param)
{
var L = param.L;
LuaProto proto;
var c = param.LoadInfo.PeekByte();
if (c == LuaConf.LUA_SIGNATURE[0])
{
L.CheckMode(param.Mode, "binary");
proto = Undump.LoadBinary(L, param.LoadInfo, param.Name);
}
else
{
L.CheckMode(param.Mode, "text");
proto = Parser.Parse(L, param.LoadInfo, param.Name);
}
var cl = new LuaLClosureValue(proto);
Utl.Assert(cl.Upvals.Length == cl.Proto.Upvalues.Count);
L.Top.V.SetClLValue(cl);
L.IncrTop();
}
private void G_TypeError(StkId o, string op)
{
CallInfo ci = CI;
string name = null;
string kind = null;
string t = ObjTypeName(ref o.V);
if (ci.IsLua)
{
kind = GetUpvalueName(ci, o, out name);
if (kind != null && IsInStack(ci, o))
{
LuaLClosureValue lcl = Stack[ci.FuncIndex].V.ClLValue();
kind = GetObjName(lcl.Proto, ci.CurrentPc,
(o.Index - ci.BaseIndex), out name);
}
}
if (kind != null)
{
G_RunError("attempt to {0} {1} '{2}' (a {3} value)",
op, kind, name, t);
}
else
{
G_RunError("attempt to {0} a {1} value", op, t);
}
}
internal int GetCurrentLine(CallInfo ci)
{
Utl.Assert(ci.IsLua);
LuaLClosureValue cl = Stack[ci.FuncIndex].V.ClLValue();
return(cl.Proto.GetFuncLine(ci.CurrentPc));
}
private void FuncInfo(LuaDebug ar, StkId func)
{
Utl.Assert(func.V.TtIsFunction());
if (func.V.ClIsLuaClosure())
{
LuaLClosureValue lcl = func.V.ClLValue();
LuaProto p = lcl.Proto;
ar.Source = string.IsNullOrEmpty(p.Source) ? "=?" : p.Source;
ar.LineDefined = p.LineDefined;
ar.LastLineDefined = p.LastLineDefined;
ar.What = (ar.LineDefined == 0) ? "main" : "Lua";
}
else if (func.V.ClIsCsClosure())
{
ar.Source = "=[C#]";
ar.LineDefined = -1;
ar.LastLineDefined = -1;
ar.What = "C#";
}
else
{
throw new System.NotImplementedException();
}
if (ar.Source.Length > LuaDef.LUA_IDSIZE)
{
ar.ShortSrc = ar.Source.Substring(0, LuaDef.LUA_IDSIZE);
}
else
{
ar.ShortSrc = ar.Source;
}
}
private void CollectValidLines(StkId func)
{
Utl.Assert(func.V.TtIsFunction());
if (func.V.ClIsLuaClosure())
{
LuaLClosureValue lcl = func.V.ClLValue();
LuaProto p = lcl.Proto;
List <int> lineinfo = p.LineInfo;
LuaTable t = new LuaTable(this);
Top.V.SetHValue(t);
IncrTop();
TValue v = new TValue();
v.SetBValue(true);
for (int i = 0; i < lineinfo.Count; ++i)
{
t.SetInt(lineinfo[i], ref v);
}
}
else if (func.V.ClIsCsClosure())
{
Top.V.SetNilValue();
IncrTop();
}
else
{
throw new System.NotImplementedException();
}
}
internal void SetClLValue(LuaLClosureValue v)
{
#if DEBUG_DUMMY_TVALUE_MODIFY
CheckLock();
#endif
Tt = (int)LuaType.LUA_TFUNCTION;
OValue = v;
}
private string GetUpvalueName(CallInfo ci, StkId o, out string name)
{
StkId func = Stack[ci.FuncIndex];
Utl.Assert(func.V.TtIsFunction() && func.V.ClIsLuaClosure());
LuaLClosureValue lcl = func.V.ClLValue();
for (int i = 0; i < lcl.Upvals.Length; ++i)
{
if (lcl.Upvals[i].V == o)
{
name = UpvalName(lcl.Proto, i);
return("upvalue");
}
}
name = default(string);
return(null);
}
private void V_PushClosure(LuaProto p, LuaUpvalue[] encup, int stackBase, StkId ra)
{
var ncl = new LuaLClosureValue(p);
ra.V.SetClLValue(ncl);
for (int i = 0; i < p.Upvalues.Count; ++i)
{
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure i:" + i );
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure InStack:" + p.Upvalues[i].InStack );
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure Index:" + p.Upvalues[i].Index );
if (p.Upvalues[i].InStack) // upvalue refers to local variable
{
ncl.Upvals[i] = F_FindUpval(
Stack[stackBase + p.Upvalues[i].Index]);
}
else // get upvalue from enclosing function
{
ncl.Upvals[i] = encup[p.Upvalues[i].Index];
}
}
}
internal void SetClLValue(LuaLClosureValue v)
{
#if DEBUG_DUMMY_TVALUE_MODIFY
CheckLock();
#endif
Tt = (int)LuaType.LUA_TFUNCTION;
NValue = 0.0;
UInt64Value = CLOSURE_LUA;
OValue = v;
}
private static void F_Load(ref LoadParameter param)
{
var L = param.L;
LuaProto proto;
var c = param.LoadInfo.PeekByte();
if( c == LuaConf.LUA_SIGNATURE[0] )
{
L.CheckMode( param.Mode, "binary" );
proto = Undump.LoadBinary(L, param.LoadInfo, param.Name);
}
else
{
L.CheckMode( param.Mode, "text" );
proto = Parser.Parse(L, param.LoadInfo, param.Name);
}
var cl = new LuaLClosureValue( proto );
Utl.Assert(cl.Upvals.Length == cl.Proto.Upvalues.Count);
L.Top.V.SetClLValue(cl);
L.IncrTop();
}
private void V_Execute()
{
ExecuteEnvironment env;
CallInfo ci = CI;
newframe:
Utl.Assert(ci == CI);
LuaLClosureValue 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:
{
StkId 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:
{
StkId 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);
StkId 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();
StkId 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:
{
StkId tbl = env.RB;
StkId key = env.RKC;
StkId 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();
StkId key = env.RKB;
StkId 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();
LuaUpvalue 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:
{
StkId key = env.RKB;
StkId 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();
LuaTable 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
StkId ra1 = Stack[ra.Index + 1];
StkId rb = env.RB;
ra1.V.SetObj(ref rb.V);
V_GetTable(rb, env.RKC, ra);
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_ADD:
{
StkId rkb = env.RKB;
StkId 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:
{
StkId rkb = env.RKB;
StkId 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:
{
StkId rkb = env.RKB;
StkId 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:
{
StkId rkb = env.RKB;
StkId 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:
{
StkId rkb = env.RKB;
StkId 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_MOD);
}
env.Base = ci.BaseIndex;
break;
}
case OpCode.OP_POW:
{
StkId rkb = env.RKB;
StkId 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:
{
StkId 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:
{
StkId 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:
{
StkId lhs = env.RKB;
StkId rhs = env.RKC;
bool 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:
{
bool 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:
{
bool 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:
{
StkId 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);
bool called = D_PreCall(ra, LuaDef.LUA_MULTRET);
// C# function ?
if (called)
{
env.Base = ci.BaseIndex;
}
// LuaFunciton
else
{
CallInfo nci = CI; // called frame
CallInfo oci = BaseCI[CI.Index - 1]; // caller frame
StkId nfunc = Stack[nci.FuncIndex]; // called function
StkId ofunc = Stack[oci.FuncIndex]; // caller function
LuaLClosureValue ncl = nfunc.V.ClLValue();
LuaLClosureValue 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
int nindex = nfunc.Index;
int 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:
{
StkId ra1 = Stack[ra.Index + 1];
StkId ra2 = Stack[ra.Index + 2];
StkId ra3 = Stack[ra.Index + 3];
double step = ra2.V.NValue;
double idx = ra.V.NValue + step; // increment index
double 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:
{
TValue init = new TValue();
TValue limit = new TValue();
TValue step = new TValue();
StkId ra1 = Stack[ra.Index + 1];
StkId 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();
}
LuaTable 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];
}
int p = ra.Index;
int 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;
}
}
}
private void V_PushClosure( LuaProto p, LuaUpvalue[] encup, int stackBase, StkId ra )
{
var ncl = new LuaLClosureValue( p );
ra.V.SetClLValue(ncl);
for( int i=0; i<p.Upvalues.Count; ++i )
{
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure i:" + i );
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure InStack:" + p.Upvalues[i].InStack );
// ULDebug.Log( "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ V_PushClosure Index:" + p.Upvalues[i].Index );
if( p.Upvalues[i].InStack ) // upvalue refers to local variable
ncl.Upvals[i] = F_FindUpval(
Stack[stackBase + p.Upvalues[i].Index] );
else // get upvalue from enclosing function
ncl.Upvals[i] = encup[ p.Upvalues[i].Index ];
}
}
/// <summary>
/// return true if function has been executed
/// </summary>
private bool D_PreCall(StkId func, int nResults)
{
// prepare for Lua call
#if DEBUG_D_PRE_CALL
ULDebug.Log("============================ D_PreCall func:" + func);
#endif
int funcIndex = func.Index;
if (!func.V.TtIsFunction())
{
// not a function
// retry with `function' tag method
func = tryFuncTM(func);
// now it must be a function
return(D_PreCall(func, nResults));
}
if (func.V.ClIsLuaClosure())
{
LuaLClosureValue cl = func.V.ClLValue();
Utl.Assert(cl != null);
LuaProto p = cl.Proto;
D_CheckStack(p.MaxStackSize + p.NumParams);
func = Stack[funcIndex];
// 补全参数
int n = (Top.Index - func.Index) - 1;
for ( ; n < p.NumParams; ++n)
{
StkId.inc(ref Top).V.SetNilValue();
}
int stackBase = (!p.IsVarArg) ? (func.Index + 1) : AdjustVarargs(p, n);
CI = ExtendCI();
CI.NumResults = nResults;
CI.FuncIndex = func.Index;
CI.BaseIndex = stackBase;
CI.TopIndex = stackBase + p.MaxStackSize;
Utl.Assert(CI.TopIndex <= StackLast);
CI.SavedPc = new InstructionPtr(p.Code, 0);
CI.CallStatus = CallStatus.CIST_LUA;
Top = Stack[CI.TopIndex];
return(false);
}
if (func.V.ClIsCsClosure())
{
LuaCsClosureValue cscl = func.V.ClCsValue();
Utl.Assert(cscl != null);
D_CheckStack(LuaDef.LUA_MINSTACK);
func = Stack[funcIndex];
CI = ExtendCI();
CI.NumResults = nResults;
CI.FuncIndex = func.Index;
CI.TopIndex = Top.Index + LuaDef.LUA_MINSTACK;
CI.CallStatus = CallStatus.CIST_NONE;
// do the actual call
int n = cscl.F(this);
// poscall
D_PosCall(Top.Index - n);
return(true);
}
throw new System.NotImplementedException();
}
private int AuxGetInfo(string what, LuaDebug ar, StkId func, CallInfo ci)
{
int status = 1;
for (int i = 0; i < what.Length; ++i)
{
char c = what[i];
switch (c)
{
case 'S':
{
FuncInfo(ar, func);
break;
}
case 'l':
{
ar.CurrentLine = (ci != null && ci.IsLua) ? GetCurrentLine(ci) : -1;
break;
}
case 'u':
{
Utl.Assert(func.V.TtIsFunction());
if (func.V.ClIsLuaClosure())
{
LuaLClosureValue lcl = func.V.ClLValue();
ar.NumUps = lcl.Upvals.Length;
ar.IsVarArg = lcl.Proto.IsVarArg;
ar.NumParams = lcl.Proto.NumParams;
}
else if (func.V.ClIsCsClosure())
{
LuaCsClosureValue ccl = func.V.ClCsValue();
ar.NumUps = ccl.Upvals.Length;
ar.IsVarArg = true;
ar.NumParams = 0;
}
else
{
throw new System.NotImplementedException();
}
break;
}
case 't':
{
ar.IsTailCall = (ci != null)
? ((ci.CallStatus & CallStatus.CIST_TAIL) != 0)
: false;
break;
}
case 'n':
{
CallInfo prevCI = BaseCI[ci.Index - 1];
if (ci != null &&
((ci.CallStatus & CallStatus.CIST_TAIL) == 0) &&
prevCI.IsLua)
{
ar.NameWhat = GetFuncName(prevCI, out ar.Name);
}
else
{
ar.NameWhat = null;
}
if (ar.NameWhat == null)
{
ar.NameWhat = ""; // not found
ar.Name = null;
}
break;
}
case 'L':
case 'f': // handled by GetInfo
break;
default: status = 0; // invalid option
break;
}
}
return(status);
}
