private static void AddDependingSymb(string symbol, string dependingSymb)
{
Dictionary <string, UnresolvedSymbol> unsolvedSymbs;
if (localScope.isLocalScope)
{
unsolvedSymbs = localScope.unsolvedSymbols;
}
else
{
unsolvedSymbs = unsolvedSymbols;
}
if (unsolvedSymbs.ContainsKey(symbol))
{
unsolvedSymbs[symbol].DependingList.Add(dependingSymb);
}
else
{
UnresolvedSymbol unsolved = new UnresolvedSymbol();
unsolved.DependingList = new List <string>();
unsolved.DependingList.Add(dependingSymb);
unsolved.ExprList = new List <ushort>();
unsolvedSymbs.Add(symbol, unsolved);
}
}
private static void ConstantHandler(Match lineReg)
{
string label = lineReg.Groups["label"].Value;
string value = lineReg.Groups["value"].Value;
ExprResult res = ResolveExpr(value);
if (res.undefinedSymbs.Count == 0)
{
Symbol symb = new Symbol()
{
Value = res.Result,
Type = res.Type
};
AddSymbol(label, symb);
}
else
{
UnresolvedSymbol unResSymb = new UnresolvedSymbol();
unResSymb.NbrUndefinedSymb = res.undefinedSymbs.Count;
unResSymb.DependingList = new List <string>();
unResSymb.Expr = value;
unResSymb.ExprList = new List <ushort>();
foreach (string symb in res.undefinedSymbs)
{
AddDependingSymb(symb, label);
}
AddUnsolvedSymbol(label, unResSymb);
}
}
private static void DataByteHandler(string bytesIn)
{
string[] bytes = bytesIn.Split(',');
foreach (string db in bytes)
{
string data = db.Trim();
if (CPUDef.isString(data)) // handle strings
{
data = data.Substring(1, data.Length - 2);
foreach (char c in data)
{
fileOutMemory.Add(Convert.ToByte(c));
currentAddr++;
}
}
else
{
ExprResult res = ResolveExpr(data);
if (res.undefinedSymbs.Count == 0)
{
fileOutMemory.Add((byte)res.Result);
}
else
{
fileOutMemory.Add(0);
ushort position = (ushort)(currentAddr - originAddr);
UnresolvedExpr expr = new UnresolvedExpr
{
Position = position,
Type = SymbolType.BYTE,
addrMode = CPUDef.AddrModes.NO,
NbrUndefinedSymb = res.undefinedSymbs.Count,
Expr = data
};
unsolvedExprList.Add(position, expr);
foreach (string symb in res.undefinedSymbs)
{
UnresolvedSymbol unResSymb = new UnresolvedSymbol();
unResSymb.DependingList = new List <string>();
unResSymb.ExprList = new List <ushort>();
unResSymb.ExprList.Add(position);
AddUnsolvedSymbol(symb, unResSymb);
}
}
currentAddr++;
}
}
}
public static void ResolveSymbols()
{
List <string> resolved = new List <string>();
foreach (string symbName in unsolvedSymbols.Keys)
{
if (!symbolTable.ContainsKey(symbName))
{
continue;
}
UnresolvedSymbol unresSymb = unsolvedSymbols[symbName];
ResolveSymbolDepsAndExprs(unresSymb);
resolved.Add(symbName);
}
foreach (string symbName in resolved)
{
unsolvedSymbols.Remove(symbName);
}
}
private static void ResolveSymbol(string label)
{
Dictionary <string, UnresolvedSymbol> unsolvedSymbs;
if (localScope.isLocalScope)
{
unsolvedSymbs = localScope.unsolvedSymbols;
}
else
{
unsolvedSymbs = unsolvedSymbols;
}
if (!unsolvedSymbs.ContainsKey(label))
{
return;
}
UnresolvedSymbol unresSymb = unsolvedSymbs[label];
ResolveSymbolDepsAndExprs(unresSymb);
unsolvedSymbs.Remove(label);
}
private static void ResolveSymbolDepsAndExprs(UnresolvedSymbol unresSymb)
{
Dictionary <string, UnresolvedSymbol> unsolvedSymbs;
if (localScope.isLocalScope)
{
unsolvedSymbs = localScope.unsolvedSymbols;
}
else
{
unsolvedSymbs = unsolvedSymbols;
}
// resolve depending symbols
foreach (string dep in unresSymb.DependingList)
{
UnresolvedSymbol unresDep = unsolvedSymbs[dep];
unresDep.NbrUndefinedSymb--;
if (unresDep.NbrUndefinedSymb <= 0)
{
ExprResult res = ResolveExpr(unresDep.Expr);
AddSymbol(dep, new Symbol()
{
Value = res.Result,
Type = res.Type
});
}
}
// resolve expressions
foreach (ushort expr in unresSymb.ExprList)
{
UnresolvedExpr unresExp = unsolvedExprList[expr];
unresExp.NbrUndefinedSymb--;
if (unresExp.NbrUndefinedSymb <= 0)
{
ExprResult res = ResolveExpr(unresExp.Expr, unresExp.addrMode);
GenerateExprBytes(unresExp, res);
unsolvedExprList.Remove(expr);
}
}
}
private static void AddUnsolvedSymbol(string unsolvedLabel, UnresolvedSymbol unresSymb)
{
Dictionary <string, UnresolvedSymbol> unsolvedSymbs;
if (localScope.isLocalScope)
{
unsolvedSymbs = localScope.unsolvedSymbols;
}
else
{
unsolvedSymbs = unsolvedSymbols;
}
if (unsolvedSymbs.ContainsKey(unsolvedLabel))
{
UnresolvedSymbol unsolved = unsolvedSymbs[unsolvedLabel];
foreach (string dep in unresSymb.DependingList)
{
if (!unsolved.DependingList.Contains(dep))
{
unsolved.DependingList.Add(dep);
}
}
foreach (ushort expr in unresSymb.ExprList)
{
if (!unsolved.ExprList.Contains(expr))
{
unsolved.ExprList.Add(expr);
}
}
if (!string.IsNullOrEmpty(unresSymb.Expr))
{
unsolved.Expr = unresSymb.Expr;
}
unsolvedSymbs[unsolvedLabel] = unsolved;
}
else
{
unsolvedSymbs.Add(unsolvedLabel, unresSymb);
}
}
private static void EndLocalScopeHandler(Match lineReg)
{
if (!localScope.isLocalScope)
{
AddError(Errors.NO_LOCAL_SCOPE);
return;
}
foreach (string symb in localScope.unsolvedSymbols.Keys)
{
if (unsolvedSymbols.ContainsKey(symb))
{
UnresolvedSymbol glUnsolvedSymbol = unsolvedSymbols[symb];
UnresolvedSymbol localUnsolvedSymbol = localScope.unsolvedSymbols[symb];
foreach (string dep in localUnsolvedSymbol.DependingList)
{
if (!glUnsolvedSymbol.DependingList.Contains(dep))
{
glUnsolvedSymbol.DependingList.Add(dep);
}
}
foreach (ushort expr in localUnsolvedSymbol.ExprList)
{
if (!glUnsolvedSymbol.ExprList.Contains(expr))
{
glUnsolvedSymbol.ExprList.Add(expr);
}
}
unsolvedSymbols[symb] = glUnsolvedSymbol;
}
else
{
UnresolvedSymbol localUnsolvedSymbol = localScope.unsolvedSymbols[symb];
localUnsolvedSymbol.Expr = null;
unsolvedSymbols.Add(symb, localUnsolvedSymbol);
}
}
localScope.isLocalScope = false;
localScope.symbolTable.Clear();
localScope.unsolvedSymbols.Clear();
}
private static void DataWordHandler(string wordsIn)
{
string[] words = wordsIn.Split(',');
foreach (string dw in words)
{
string data = dw.Trim();
ExprResult res = ResolveExpr(data);
if (res.undefinedSymbs.Count == 0)
{
fileOutMemory.AddRange(GetWordBytes((ushort)res.Result));
}
else
{
fileOutMemory.AddRange(new byte[2] {
0, 0
});
ushort position = (ushort)(currentAddr - originAddr);
UnresolvedExpr expr = new UnresolvedExpr
{
Position = position,
Type = SymbolType.WORD,
addrMode = CPUDef.AddrModes.NO,
NbrUndefinedSymb = res.undefinedSymbs.Count,
Expr = data
};
unsolvedExprList.Add(position, expr);
foreach (string symb in res.undefinedSymbs)
{
UnresolvedSymbol unResSymb = new UnresolvedSymbol();
unResSymb.DependingList = new List <string>();
unResSymb.ExprList = new List <ushort>();
unResSymb.ExprList.Add(position);
AddUnsolvedSymbol(symb, unResSymb);
}
}
currentAddr += 2;
}
}
private static void InstructionHandler(Match lineReg)
{
string opcode = lineReg.Groups["opcode"].Value;
string operands = lineReg.Groups["operands"].Value;
if (macros.ContainsKey(opcode))
{
Match macroReg = Regex.Match($"{opcode} {operands}", CPUDef.macroReg);
CallMacroHandler(macroReg);
return;
}
string label = lineReg.Groups["label"].Value;
ushort opcodeAddr = currentAddr;
opcode = lineReg.Groups["opcode"].Value.ToUpper();
if (!string.IsNullOrWhiteSpace(label))
{
Symbol lSymb = new Symbol {
Type = SymbolType.WORD, Value = currentAddr
};
AddSymbol(label, lSymb);
}
Byte[] addrModesValues = CPUDef.OPC_TABLE[opcode];
CPUDef.AddrModes addrMode = CPUDef.AddrModes.NO;
List <byte> instBytes = new List <byte>();
CPUDef.InstructionInfo instInfo = new CPUDef.InstructionInfo();
bool syntaxError = true;
if (string.IsNullOrWhiteSpace(operands))
{
syntaxError = false;
// 1 byte opcode
if (Array.Exists(CPUDef.ACC_OPC, opc => opc.Equals(opcode)))
{
addrMode = CPUDef.AddrModes.ACC;
}
else
{
addrMode = CPUDef.AddrModes.IMP;
}
instInfo = new CPUDef.InstructionInfo {
addrMode = addrMode, nbrBytes = 1
};
instBytes.Add(addrModesValues[(int)addrMode]);
}
else
{
string expr = string.Empty;
// 2 bytes opcode
if (Array.Exists(CPUDef.REL_OPC, opc => opc.Equals(opcode)))
{
syntaxError = false;
expr = operands;
instInfo = new CPUDef.InstructionInfo {
addrMode = CPUDef.AddrModes.REL, nbrBytes = 2
};
}
else
{
instInfo = CPUDef.GetInstructionInfo(operands);
syntaxError = false;
expr = instInfo.expr;
}
if (syntaxError)
{
AddError(Errors.OPERANDS);
}
else
{
addrMode = instInfo.addrMode;
ExprResult exprRes = ResolveExpr(expr, addrMode);
if (exprRes.undefinedSymbs.Count == 0)
{
// convert to zero page if symbol is a single byte
if (CPUDef.isAbsoluteAddr(addrMode) && exprRes.Type == SymbolType.BYTE)
{
addrMode = addrMode + 3;
instInfo.nbrBytes = 2;
}
instBytes.Add(addrModesValues[(int)addrMode]);
if (instInfo.nbrBytes == 2)
{
instBytes.Add((byte)exprRes.Result);
}
else
{
instBytes.AddRange(GetWordBytes((ushort)exprRes.Result));
}
}
else
{
instBytes.Add(addrModesValues[(int)addrMode]);
SymbolType typeExpr;
if (instInfo.nbrBytes == 2)
{
instBytes.AddRange(new byte[1] {
0
});
typeExpr = SymbolType.BYTE;
}
else // 3 bytes instr
{
instBytes.AddRange(new byte[2] {
0, 0
});
typeExpr = SymbolType.WORD;
}
ushort position = (ushort)(opcodeAddr - originAddr + 1);
UnresolvedExpr exprObj = new UnresolvedExpr
{
Position = position,
Type = typeExpr,
addrMode = addrMode,
NbrUndefinedSymb = exprRes.undefinedSymbs.Count,
Expr = expr
};
unsolvedExprList.Add(position, exprObj);
foreach (string symb in exprRes.undefinedSymbs)
{
UnresolvedSymbol unResSymb = new UnresolvedSymbol();
unResSymb.DependingList = new List <string>();
unResSymb.ExprList = new List <ushort>();
unResSymb.ExprList.Add(position);
AddUnsolvedSymbol(symb, unResSymb);
}
}
}
}
if (!syntaxError)
{
currentAddr += instInfo.nbrBytes;
fileOutMemory.AddRange(instBytes.ToArray());
MainConsole.WriteLine($"{opcode} mode {addrMode.ToString()}");
}
}