//******************************************************************************
//*** FUNCTION ValidateLabel
//*** **************************************************************************
//*** DESCRIPTION : Takes a string and ensures the string is a valid
//*** symbol label
//*** INPUT ARGS : string label, string currentLine, string errorPrefix=""
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : bool isValid
//******************************************************************************
public static bool ValidateLabel(string label, string currentLine, string errorPrefix = "")
{
bool isValid = true;
if (label.Length > 12)
{
Chronicler.LogError("Symbol Label(" + label + ") is too long, \n\tmust be less than 12 charachters in length, skipping: \"" + currentLine + "\"" + "\n", errorPrefix);
isValid = false;
}
else if (label.Length == 0)
{
Chronicler.LogError("Symbol Label(" + label + ") is empty, skipping: \"" + currentLine + "\"" + "\n", errorPrefix);
isValid = false;
}
else if (!char.IsLetter(label[0]))
{
Chronicler.LogError("Symbol Label(" + label + ") does not start with a letter(" + label[0] + "), \n\tskipping: \"" + currentLine + "\"" + "\n", errorPrefix);
isValid = false;
}
else//only continue validation on short Label that fit in the 12 chars
{
for (int i = 0; i < label.Length && isValid == true; i++)
{
if (!char.IsLetterOrDigit(label[i]))
{
Chronicler.LogError("Invalid special charachters('" + label[i] + "') detected in Symbol Label(" + label + "), \n\tskipping: \"" + currentLine + "\"" + "\n", errorPrefix);
isValid = false;
}
}
}
return(isValid);
}
//************************************************************************
//*** FUNCTION SearchSymbol
//*** ********************************************************************
//*** DESCRIPTION : Takes a string and searches for a symbol
//*** that fits that key
//*** INPUT ARGS : string str
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : Symbol?
//************************************************************************
public bool SearchSymbol(string symbolLabel, string currentLine, out Globals.Symbol?tempN)
{
bool rtnVal = true;
tempN = null;
symbolLabel = symbolLabel.Trim();
if (ValidateLabel(symbolLabel, currentLine, "Searching symbol"))
{
if (symbolLabel.Length > 6)
{
symbolLabel = symbolLabel.Substring(0, 6);
}
}
else
{
return(false);
}
Globals.Symbol temp;
if (SymbolTableBST.TryGetValue(symbolLabel, out temp))
{
tempN = temp;
}
else
{
Chronicler.LogError("Symbol(" + symbolLabel + ") not found", "Searching for symbol");
rtnVal = false;
}
return(rtnVal);
}
////************************************************************************
////*** FUNCTION SearchSymbol
////*** ********************************************************************
////*** DESCRIPTION : Takes a file path to parse and validate symbol
////*** labels which are then search for in the BST and
////*** the output is dumped to the console
////*** INPUT ARGS : string filePath
////*** OUTPUT ARGS : N/A
////*** IN/OUT ARGS : N/A
////*** RETURN : N/A
////************************************************************************
//public void SearchSymbols(string filePath)
//{
// FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan);
// StreamReader streamReader = new StreamReader(fileStream);
// while (!streamReader.EndOfStream)
// {
// //get the line and trim whitespace
// string currentLine = streamReader.ReadLine().CompactAndTrimWhitespaces();
// bool discardLine = false;
// if (currentLine == "")
// {
// Chronicler.LogError("blank line, skipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
// discardLine = true;
// }
// if (discardLine !=true && ValidateLabel(currentLine, currentLine, "Seeking Symbol"))
// {
// StringBuilder stringBuilder = new StringBuilder();
// for (int i = 0; i < currentLine.Length && i < 6; i++)
// stringBuilder.Append(currentLine[i]);
// if (SearchSymbol(stringBuilder.ToString(), out Globals.Symbol? temp))
// {
// Chronicler.Write("Found symbol: ");
// temp.Value.Print(Chronicler.OutputOptions.IGNORE);
// }
// else
// {
// Chronicler.WriteLine("Symbol(" + currentLine + ") not found");
// }
// }
// }
// streamReader.Dispose();
// fileStream.Dispose();
//}
//************************************************************************
//*** FUNCTION Print
//*** ********************************************************************
//*** DESCRIPTION : prints the current contents of the symbol table
//*** INPUT ARGS : N/A
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : N/A
//************************************************************************
public void Print(Chronicler.OutputOptions outputOptions = Chronicler.OutputOptions.IGNORE)
{
Chronicler.WriteLine("Symbol\tRFlag\tValue \tMFlag \tIFlag", outputOptions);
Chronicler.WriteLine("=====================================", outputOptions);
foreach (KeyValuePair <string, Globals.Symbol> keyValuePair in SymbolTableBST)
{
keyValuePair.Value.Print(outputOptions);
}
}
//************************************************************************
//*** FUNCTION Print
//*** ********************************************************************
//*** DESCRIPTION : prints the current contents of the symbol
//*** INPUT ARGS : N/A
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : N/A
//************************************************************************
public void Print(Chronicler.OutputOptions outputOptions, StreamWriter streamWriter = null)
{
if (streamWriter == null)
{
Chronicler.WriteLine(label + "\t" + RFlag + "\t" + value.ToString("X6") + "\t" + MFlag + "\t" + IFlag, outputOptions);
}
else
{
streamWriter.WriteLine(label + "\t" + RFlag + "\t" + value.ToString("X6") + "\t" + MFlag + "\t" + IFlag, outputOptions);
}
}
static void DumpIntermidiateFile(string filePath, List <ExpresionLine> expresionLines, Globals.DataStructures dataStructures)
{
using (System.IO.StreamWriter file = new System.IO.StreamWriter(filePath + ".tmp"))
{
Chronicler.HoldOutput();
int curLinNum = 0;
foreach (ExpresionLine expLine in expresionLines)
{
if (expLine != null && expLine.OriginalLine != null && expLine.OriginalLine != "")
{
curLinNum = expLine.lineNumber;
file.Write(curLinNum.ToString() + "\t");
if (expLine.CommentLine != true)
{
file.Write(expLine.locationCounter.ToString("X6") + "\t");
}
file.Write(expLine.OriginalLine);
file.Write("\n");
Chronicler.Write(curLinNum.ToString() + "\t");
if (expLine.CommentLine != true)
{
Chronicler.Write(expLine.locationCounter.ToString("X6") + "\t");
}
Chronicler.WriteLine(expLine.OriginalLine);
}
}
foreach (LiteralTable.LiteralValue lv in dataStructures.literalTable.literalTable)
{
curLinNum++;
file.Write(curLinNum.ToString() + "\t");
file.Write(lv.address.ToString("X6") + "\t");
file.Write("*" + "\t");
file.Write(lv.label);
file.Write("\n");
Chronicler.Write(curLinNum.ToString() + "\t");
Chronicler.Write(lv.address.ToString("X6") + "\t");
Chronicler.Write("*" + "\t");
Chronicler.WriteLine(lv.label);
}
}
Chronicler.HoldOutput();
dataStructures.symbolTable.Print();
Chronicler.HoldOutput();
dataStructures.literalTable.PrintTable();
}
public static bool ParseNewStyleLiteral(string operand, out LiteralTable.LiteralValue literalValue, out string comment, string callingModule = "")
{
operand = operand.Trim();
callingModule = callingModule == "" ? "Parse New Style Literal" : callingModule;
literalValue = new LiteralTable.LiteralValue();
comment = "";
if (operand[0] != '=')
{
Chronicler.LogError("New style literals must begin with '='", callingModule);
return(false);
}
operand = operand.Substring(1, operand.Length - 1).Trim();
bool rtnVal = ParseOldStyleLiteral(operand, out literalValue, out comment, callingModule);
literalValue.isOldStyleLiteral = false;
return(rtnVal);
}
//*******************************************************************************************
//*** FUNCTION ParseTerm
//*** ***************************************************************************************
//*** DESCRIPTION : parses an term str(int or symbol) to a symbol struct
//*** INPUT ARGS : SymbolTable symbolTable, string term, string currentLine=""
//*** OUTPUT ARGS : out Globals.Symbol? sym
//*** IN/OUT ARGS : N/A
//*** RETURN : bool rtnVal
//*******************************************************************************************
static bool ParseTerm(SymbolTable symbolTable, string term, out Globals.Symbol?sym, string currentLine)
{
bool rtnVal = true;
if (char.IsDigit(term[0]) || (term[0] == '-' && char.IsDigit(term[1])))
{
sym = null;
if (ParseNum(term, out Globals.Symbol? tmp, currentLine) == true)
{
sym = tmp;
}
else
{
Chronicler.LogDetailedInfo("Parse term(digit) in Expresion Handler failed");
rtnVal = false;
}
}
else
{
int Mval = 1;
if (term[0] == '-')
{
term.Substring(1, term.Length - 1);
Mval = -1;
}
Chronicler.LogDetailedInfo("Parse term(sym) start");
if ((symbolTable.SearchSymbol(term.Trim(), currentLine, out sym)) != true)
{
Chronicler.LogDetailedInfo("Parse term(sym) in Expresion Handler failed");
rtnVal = false;
}
if (sym.HasValue)
{
Globals.Symbol tmp = sym.Value;
tmp.value *= Mval;
sym = tmp;
}
Chronicler.LogDetailedInfo("Parse term(sym) end");
}
return(rtnVal);
}
//******************************************************************************
//*** FUNCTION TestAndSetRFlag
//*** **************************************************************************
//*** DESCRIPTION : maps rflag string vals to boolean vals
//*** INPUT ARGS : string rFlagIn, string currentLine,
//*** string errorPrefix = ""
//*** OUTPUT ARGS : bool rFlagOut
//*** IN/OUT ARGS : N/A
//*** RETURN : bool discardLine
//******************************************************************************
bool TestAndSetRFlag(string rFlagIn, out bool rFlagOut, string currentLine, string errorPrefix = "")
{
bool discardLine = false;
if (rFlagIn == "true" || rFlagIn == "1")
{
rFlagOut = true;
}
else if (rFlagIn == "false" || rFlagIn == "0")
{
rFlagOut = false;
}
else
{
rFlagOut = default;
discardLine = true;
Chronicler.LogError("Invalid RFlag value(" + rFlagIn + "), skipping: \"" + currentLine + "\"" + "\n", errorPrefix);
}
return(discardLine);
}
//*******************************************************************************************
//*** FUNCTION ParseNum
//*** ***************************************************************************************
//*** DESCRIPTION : parses an int str to a symbol
//*** INPUT ARGS : string digits, string currentLine=""
//*** OUTPUT ARGS : out Globals.Symbol? sym
//*** IN/OUT ARGS : N/A
//*** RETURN : bool rtnVal
//*******************************************************************************************
static public bool ParseNum(string digits, out Globals.Symbol?sym, string currentLine = "")
{
Globals.Symbol tmp = default;
bool rtnVal = true;
if (int.TryParse(digits, out tmp.value) == true)
{
tmp.label = digits;
tmp.RFlag = false;
tmp.MFlag = false;
sym = tmp;
}
else
{
Chronicler.LogError("Unable to parse integer value(" + digits + "), skipping: \"" + currentLine + "\"", "Resolving Expresion");
sym = null;
rtnVal = false;
}
return(rtnVal);
}
public bool addSymbol(string label, bool rflag, int value, string currentLine)
{
label = label.Trim();
if (ValidateLabel(label, currentLine, "Pass One adding symbol"))
{
Globals.Symbol newSym = default;
newSym.label = label;
if (newSym.label.Length > 6)
{
newSym.label = newSym.label.Substring(0, 6);
}
newSym.RFlag = rflag;
newSym.value = value;
newSym.MFlag = false;
if (SymbolTableBST.ContainsKey(newSym.label))
{
Chronicler.LogError("Symbol with same Label('" + newSym.label + "') already exists! Setting MFlag and \n\tskipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
Globals.Symbol sym = SymbolTableBST.GetValueOrDefault(newSym.label);
if (sym.MFlag == false)
{
sym.MFlag = true;
SymbolTableBST.Remove(newSym.label);
SymbolTableBST.Add(newSym.label, sym);
}
return(false);
}
else
{
Chronicler.Write("Adding symbol: ", Chronicler.OutputOptions.INFO);
newSym.Print(Chronicler.OutputOptions.INFO);
SymbolTableBST.Add(newSym.label, newSym);
}
}
else
{
return(false);
}
return(true);
}
//*************************************************************************
//*** FUNCTION Main
//*** *********************************************************************
//*** DESCRIPTION : This is the main program driver
//*** INPUT ARGS : string[] args
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : N/A
//*************************************************************************
static void Main(string[] args)
{
Chronicler.WriteLine("Loading symbols...");
Globals.DataStructures dataStructures = new Globals.DataStructures();
string filePath;
if (args.Length == 0)
{
Chronicler.WriteLine("Please enter the search file name: ");
filePath = Console.ReadLine();
}
else
{
filePath = args[0];
}
Chronicler.HoldOutput();
Chronicler.NewLine();
Chronicler.NewLine();
PassOne.Execute(dataStructures, out System.Collections.Generic.List <PassOne.ExpresionLine> expresionLines, "../../../" + filePath);
//symbolTable.SearchSymbols("../../../" + filePath);
Chronicler.HoldOutput();
PassTwo.Execute(dataStructures, expresionLines, "../../../" + filePath);
}
//************************************************************************
//*** FUNCTION PrintTable
//*** ********************************************************************
//*** DESCRIPTION : prints the current contents of the literal table
//*** INPUT ARGS : N/A
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : N/A
//************************************************************************
public void PrintTable(Chronicler.OutputOptions outputOptions = Chronicler.OutputOptions.IGNORE)
{
Chronicler.WriteLine("NAME\t\tVALUE\t\tLENGTH\tADDRESS", outputOptions);
Chronicler.WriteLine("===============================================", outputOptions);
StringBuilder sb = new StringBuilder("");
foreach (LiteralValue lv in literalTable)
{
sb.Clear();
for (int x = 0; x < (16 - lv.label.Length); x++)
{
sb.Append(" ");
}
Chronicler.Write(lv.label + sb.ToString(), outputOptions);
sb.Clear();
for (int x = 0; x < (16 - lv.hexValue.Length); x++)
{
sb.Append(" ");
}
Chronicler.Write(lv.hexValue + sb.ToString(), outputOptions);
Chronicler.Write(lv.Length.ToString(), outputOptions);
Chronicler.WriteLine("\t" + lv.address.ToString("X6"), outputOptions);
}
}
static void DumpObjFile(string filePath, List <PassOne.ExpresionLine> expresionLines, Globals.DataStructures dataStructures)
{
using (System.IO.StreamWriter file = new System.IO.StreamWriter(filePath + ".txt"))
{
Chronicler.HoldOutput();
int curLinNum = 0;
foreach (PassOne.ExpresionLine expLine in expresionLines)
{
if (expLine != null && expLine.OriginalLine != null && expLine.OriginalLine != "")
{
curLinNum = expLine.lineNumber;
file.Write(curLinNum.ToString() + "\t");
if (expLine.CommentLine != true)
{
file.Write(expLine.locationCounter.ToString("X6") + "\t");
}
file.Write(expLine.OriginalLine + "\t");
file.Write(expLine.Opcode);
file.Write("\n");
Chronicler.Write(curLinNum.ToString() + "\t");
if (expLine.CommentLine != true)
{
Chronicler.Write(expLine.locationCounter.ToString("X6") + "\t");
}
Chronicler.Write(expLine.OriginalLine + "\t");
Chronicler.WriteLine(expLine.Opcode);
}
}
foreach (LiteralTable.LiteralValue lv in dataStructures.literalTable.literalTable)
{
curLinNum++;
file.Write(curLinNum.ToString() + "\t");
file.Write(lv.address.ToString("X6") + "\t");
file.Write("*" + "\t");
file.Write(lv.label);
file.Write("\n");
Chronicler.Write(curLinNum.ToString() + "\t");
Chronicler.Write(lv.address.ToString("X6") + "\t");
Chronicler.Write("*" + "\t");
Chronicler.WriteLine(lv.label);
}
}
Chronicler.HoldOutput();
dataStructures.symbolTable.Print();
Chronicler.HoldOutput();
dataStructures.literalTable.PrintTable();
using (System.IO.StreamWriter file = new System.IO.StreamWriter(filePath + ".obj"))
{
Chronicler.HoldOutput();
string buffer = "";
string prevOpCode = "start";
int sl = 0;
if (expresionLines.Count > 0)
{
sl = expresionLines[0].locationCounter;
}
Chronicler.WriteLine("Object code:");
foreach (PassOne.ExpresionLine expLine in expresionLines)
{
if (expLine != null && expLine.OriginalLine != null && expLine.OriginalLine != "")
{
if ((buffer.Length + expLine.Opcode.Length) > 60 || (prevOpCode == "" && buffer != ""))
{
//dump buffer contents
file.Write("T" + sl.ToString("X5") + buffer.Length.ToString("X2") + buffer);
file.Write("\n");
Chronicler.WriteLine("T" + buffer);
sl = expLine.locationCounter;
//clear buffer
buffer = "";
}
prevOpCode = expLine.Opcode; //check continuity
buffer += expLine.Opcode; //add curr line to buffer
}
}
if (buffer != "")
{
//dump buffer contents
file.Write("T" + sl.ToString("X5") + buffer.Length.ToString("X2") + buffer);
file.Write("\n");
Chronicler.WriteLine("T" + buffer);
//clear buffer
buffer = "";
}
foreach (LiteralTable.LiteralValue lv in dataStructures.literalTable.literalTable)
{
if (buffer != "" && (buffer.Length + lv.hexValue.Length) > 60)
{
//dump buffer contents
file.Write("T" + sl.ToString("X5") + buffer.Length.ToString("X2") + buffer);
file.Write("\n");
Chronicler.WriteLine("T" + buffer);
//clear buffer
buffer = "";
}
buffer += lv.hexValue;//add curr line to buffer
}
if (buffer != "")
{
//dump buffer contents
file.Write("T" + sl.ToString("X5") + buffer.Length.ToString("X2") + buffer);
file.Write("\n");
Chronicler.WriteLine("T" + buffer);
//clear buffer
buffer = "";
}
dataStructures.symbolTable.PrintFile(file);
dataStructures.symbolTable.Print();
}
}
public static void Execute(Globals.DataStructures dataStructures, List <PassOne.ExpresionLine> expresionLines, string filePath)
{
Chronicler.Write("\nPassTwo\n");
foreach (PassOne.ExpresionLine expresionLine in expresionLines)
{
//evaluate expresion
if (expresionLine.DeferExpresionResolutiontoPass2 && (expresionLine.instructionFormat == 3 || expresionLine.instructionFormat == 4))
{
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, expresionLine.operandFieldAndComment, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
}
//convert expresion format
if (expresionLine.Opcode == "" && expresionLine.IsEQU != true && (expresionLine.instructionFormat == 3 || expresionLine.instructionFormat == 4))//don't redo work
{
switch (expresionLine.expresionData.ExpresionType)
{
case Globals.ExpresionData.Contents.SYMBOL:
int?value = null;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
}
if (value.HasValue && expresionLine.instructionFormat == 4)
{
expresionLine.Opcode = value.Value.ToString("X5");
}
else if (value.HasValue && expresionLine.instructionFormat == 3)
{
expresionLine.Opcode = value.Value.ToString("X3");
}
break;
case Globals.ExpresionData.Contents.ERROR:
Chronicler.WriteLine("This is wrong for some reason, you should look at it:\n" + expresionLine.OriginalLine, Chronicler.OutputOptions.ERR);
break;
case Globals.ExpresionData.Contents.LITERAL:
if (expresionLine.expresionData.literal.isOldStyleLiteral != true)
{
expresionLine.Opcode = expresionLine.locationCounter.ToString("X6");
}
break;
case Globals.ExpresionData.Contents.EMPTY:
//consider break
break;
}
}
if (expresionLine.operationData.HasValue && expresionLine.operationData.Value.format == 2)
{
string[] tmp = expresionLine.operandFieldAndComment.Split(";", StringSplitOptions.RemoveEmptyEntries);
if (tmp.Length > 0)
{
expresionLine.operandFieldAndComment = tmp[0];
}
string[] subStrs = expresionLine.operandFieldAndComment.Split(",", StringSplitOptions.RemoveEmptyEntries);
if (subStrs.Length == 1)
{
int val;
if (dataStructures.opcodeTable.RegisterTable.TryGetValue(subStrs[0].Trim(), out val))
{
expresionLine.Opcode = val.ToString();
}
else
{
Chronicler.LogError("failed parsing F2: " + expresionLine.OriginalLine);
}
}
else if (subStrs.Length == 2)
{
int val;
if (dataStructures.opcodeTable.RegisterTable.TryGetValue(subStrs[0].Trim(), out val))
{
expresionLine.Opcode = val.ToString() + "0";
}
else
{
Chronicler.LogError("failed parsing F2: " + expresionLine.OriginalLine);
}
if (dataStructures.opcodeTable.RegisterTable.TryGetValue(subStrs[1].Trim(), out val))
{
expresionLine.Opcode += val.ToString();
}
else
{
Chronicler.LogError("failed parsing F2: " + expresionLine.OriginalLine);
}
}
else
{
Chronicler.LogError("failed parsing F2, incorect term count: " + expresionLine.OriginalLine);
}
}
if (expresionLine.operationData.HasValue)
{
expresionLine.Opcode = expresionLine.operationData.Value.code.ToString("X") + expresionLine.Opcode;
}
}
DumpObjFile(filePath, expresionLines, dataStructures);
}
//************************************************************************
//*** FUNCTION LoadSymbols
//*** ********************************************************************
//*** DESCRIPTION : opens a file and populates SymbolTableBST
//*** INPUT ARGS : string filePath
//*** OUTPUT ARGS : N/A
//*** IN/OUT ARGS : N/A
//*** RETURN : N/A
//************************************************************************
public void LoadSymbols(string filePath)
{
Globals.Symbol symbol = default;
symbol.label = "";
symbol.IFlag = true;
char[] tmpLabel = new char[7];
//discard line flag
bool discardLine;
//get the line and trim whitespace
string currentLine;
string[] rflagAndValueStrings;
string rFlag;
try
{
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan))
{
try
{
using (StreamReader streamReader = new StreamReader(fileStream))
{
while (!streamReader.EndOfStream)
{
//discard line flag
discardLine = false;
//get the line and trim whitespace
currentLine = streamReader.ReadLine().CompactAndTrimWhitespaces();
if (currentLine == "")
{
Chronicler.LogError("blank line, skipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
discardLine = true;
}
else if (currentLine.CountStringCharachters(':') != 1)//check incorrect colon seperator count
{
Chronicler.LogError("Extra colon seperators in current line, skipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
discardLine = true;
}
if (!discardLine)
{
string[] symbolSubstrings = currentLine.Split(':');
//validate Label
string label = symbolSubstrings[0].Trim();
discardLine = !ValidateLabel(label, currentLine, "Adding Symbol");
if (!discardLine)
{
rflagAndValueStrings = symbolSubstrings[1].Trim().Split(' ');
//validate RFlag
rFlag = rflagAndValueStrings[0].Trim();
discardLine = TestAndSetRFlag(rFlag, out symbol.RFlag, currentLine, "Adding Symbol");
if (!discardLine)
{
string value = rflagAndValueStrings[1].Trim();
if (!int.TryParse(value, out symbol.value) || value[0] == '+')
{
discardLine = true;
Chronicler.LogError("Invalid integer value(" + value + "), skipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
}
if (!discardLine)
{
//parse data into Symbol struct
int symbolLabelIndex = 0;
for (symbolLabelIndex = 0; symbolLabelIndex < 6 && symbolLabelIndex < label.Length; symbolLabelIndex++)
{
tmpLabel[symbolLabelIndex] = label[symbolLabelIndex];
}
tmpLabel[symbolLabelIndex] = '\0';
StringBuilder sb = new StringBuilder("");
foreach (char c in tmpLabel.TakeWhile(c => c != '\0'))
{
sb.Append(c);
}
symbol.label = sb.ToString().Trim();
symbol.MFlag = false;
if (SymbolTableBST.ContainsKey(symbol.label))
{
Chronicler.LogError("Symbol with same Label('" + symbol.label + "') already exists! Setting MFlag and \n\tskipping: \"" + currentLine + "\"" + "\n", "Adding Symbol");
Globals.Symbol sym = SymbolTableBST.GetValueOrDefault(symbol.label);
if (sym.MFlag == false)
{
sym.MFlag = true;
SymbolTableBST.Remove(symbol.label);
SymbolTableBST.Add(symbol.label, sym);
}
}
else
{
Chronicler.Write("Adding symbol: ", Chronicler.OutputOptions.INFO);
symbol.Print(Chronicler.OutputOptions.INFO);
SymbolTableBST.Add(symbol.label, symbol);
}
}
}
}
}
}
}
}
catch (IOException e)
{
Chronicler.LogError("failed to open File: " + filePath);
}
}
}
catch (IOException e)
{
Chronicler.LogError("failed to open File: " + filePath);
}
}
////*******************************************************************************************
////*** FUNCTION ParseExpresionFile
////*** ***************************************************************************************
////*** DESCRIPTION : Parses the Expresion File
////*** INPUT ARGS : SymbolTable symbolTable, LiteralTable literalTable, string filePath
////*** OUTPUT ARGS : N/A
////*** IN/OUT ARGS : N/A
////*** RETURN : N/A
////*******************************************************************************************
//public static void ParseExpresionFile(SymbolTable symbolTable, LiteralTable literalTable, string filePath)
//{
// try
// {
// using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan))
// {
// try
// {
// using (StreamReader streamReader = new StreamReader(fileStream))
// {
// int LineNumber = 1;
// Chronicler.WriteLine("EXPRESION\tVALUE\tRELOCATABLE\tN-Bit\tI-Bit\tX-Bit");
// while (!streamReader.EndOfStream)
// {
// //get the line and trim whitespace
// string currentLine = streamReader.ReadLine().Trim();
// if (ResolveF3F4Expresion(symbolTable, literalTable, currentLine, currentLine, out Globals.Symbol? symbol))
// {
// if (symbol != null)
// {
// StringBuilder sb = new StringBuilder("");
// for (int x = 0; x < (16 - currentLine.Length); x++)
// {
// sb.Append(" ");
// }
// Chronicler.Write(currentLine + sb.ToString());
// Chronicler.Write(symbol.Value.value.ToString());
// Chronicler.Write("\t" + ((symbol.Value.RFlag) ? "RELOCATABLE" : "ABSOLUTE"));
// Chronicler.NewLine();
// }
// }
// else
// {
// Chronicler.LogError("Line: \"" + LineNumber + "\" Skipping: \"" + currentLine + "\"", "Expresion File Parsing");
// }
// LineNumber++;
// }
// Chronicler.LogInfo("DONE loading symbols!");
// }
// }
// catch (IOException e)
// {
// Chronicler.WriteLine(e.Message);
// Chronicler.LogError("failed to open File: " + filePath);
// }
// }
// }
// catch (IOException e)
// {
// Chronicler.WriteLine(e.Message);
// Chronicler.LogError("failed to open File: " + filePath);
// }
//}
//*******************************************************************************************
//*** FUNCTION ResolveF3F4Expresion
//*** ***************************************************************************************
//*** DESCRIPTION : Resolves an expresion and adds a literal or gets a symbol
//*** INPUT ARGS : SymbolTable symbolTable, LiteralTable literalTable,
//*** string expresion, string currentLine
//*** OUTPUT ARGS : out Globals.Symbol? symbol
//*** IN/OUT ARGS : N/A
//*** RETURN : bool rtnVal
//*******************************************************************************************
public static bool ResolveF3F4Expresion(Globals.DataStructures dataStructures, string expresionString, string currentLine, out Globals.ExpresionData expresionData, string callingModule = "ExpresionHandler")
{
expresionData = new Globals.ExpresionData();
bool rtnVal = true;
Regex testXValue = new Regex(@"(^[^=][^,;]*(?<x>,x|X){0,1}.*$)|(^[\t ]*=.*$)");
bool hasXValue = testXValue.Match(expresionString).Groups["x"].Value != "";
expresionString = expresionString.Trim();
if (Parser.guessOperandType(expresionString) == Parser.OperandType.NEW_STYLE_LITERAL || Parser.guessOperandType(expresionString) == Parser.OperandType.OLD_STYLE_LITERAL)
{
Chronicler.LogInfo("Parsing as literal: " + expresionString);
if (Parser.guessOperandType(expresionString) == Parser.OperandType.NEW_STYLE_LITERAL)
{
LiteralTable.LiteralValue tmp = new LiteralTable.LiteralValue();
string comment = "";
Parser.ParseNewStyleLiteral(expresionString, out tmp, out comment, callingModule);
expresionData.literal = tmp;
dataStructures.literalTable.add(tmp);
}
else if (Parser.guessOperandType(expresionString) == Parser.OperandType.OLD_STYLE_LITERAL)
{
LiteralTable.LiteralValue tmp = new LiteralTable.LiteralValue();
string comment = "";
Parser.ParseOldStyleLiteral(expresionString, out tmp, out comment, callingModule);
expresionData.literal = tmp;
}
}
else if (expresionString.Length > 0 && expresionString[0] == '@')
{
expresionString = expresionString.Substring(1, expresionString.Length - 1);
hasXValue = testXValue.Match(expresionString).Groups["x"].Value != "";
if (hasXValue != true)
{
if (ParseTerms(dataStructures, expresionString, currentLine, out expresionData) != true)
{
rtnVal = false;
}
expresionData.N = true;
expresionData.I = false;
}
else
{
rtnVal = false;
Chronicler.LogError("Can not apply both indirect adressing \n\tand x register indexing, skipping: \"" + currentLine + "\"", "Resovling Expresion");
}
}
else if (expresionString.Length > 0 && expresionString[0] == '#')
{
expresionString = expresionString.Substring(1, expresionString.Length - 1);
hasXValue = testXValue.Match(expresionString).Groups["x"].Value != "";
if (hasXValue != true)
{
if (ParseTerms(dataStructures, expresionString, currentLine, out expresionData) != true)
{
rtnVal = false;
}
expresionData.N = false;
expresionData.I = false;
}
else
{
rtnVal = false;
Chronicler.LogError("Can not apply both immediate adressing \n\tand x register indexing, skipping:\"" + currentLine + "\"", "Resovling Expresion");
}
}
else if (hasXValue == true)
{
expresionString = testXValue.Replace(expresionString, "$2$4$5");
if (ParseTerms(dataStructures, expresionString, currentLine, out expresionData) != true)
{
rtnVal = false;
}
expresionData.N = true;
expresionData.I = true;
expresionData.X = true;
}
else
{
rtnVal = ParseTerms(dataStructures, expresionString, currentLine, out expresionData);
}
return(rtnVal);
}
public static void Execute(Globals.DataStructures dataStructures, out List <ExpresionLine> expresionLines, string filePath)
{
int locationCounter = 0;
int lineNumber = 0;
expresionLines = new List <ExpresionLine>();
Regex regex = new Regex(@"^([\t ]*(?<label>[^\s]+:)[\t ]*){0,1}[\t ]*(?<flag>\+{0,1}[\t ]*)(?<operation>[^\s]+)(?<operandFieldAndComment>[\t ].*){0,1}[\t ]*($|(\r?\n))");
int programLength = 0;
bool skipOperandParsing = false;
try
{
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan))
{
try
{
using (StreamReader streamReader = new StreamReader(fileStream))
{
while (!streamReader.EndOfStream)
{
lineNumber++;
string currentLine = streamReader.ReadLine().Trim();
Match match = regex.Match(currentLine);
skipOperandParsing = false;
if (match.Success)
{
ExpresionLine expresionLine = new ExpresionLine();
expresionLine.OriginalLine = currentLine;
expresionLine.lineNumber = lineNumber;
expresionLine.locationCounter = locationCounter;
expresionLine.label = match.Groups["label"].Value.Trim();
expresionLine.operation = match.Groups["operation"].Value.Trim();
expresionLine.operandFieldAndComment = match.Groups["operandFieldAndComment"].Value.Trim();
expresionLine.lineNumber = lineNumber;
expresionLine.format4indicator = match.Groups["flag"].Value.Trim();
expresionLine.DeferExpresionResolutiontoPass2 = false;
if (expresionLine.label != "")
{
if (expresionLine.label[expresionLine.label.Length - 1] == ':')
{
expresionLine.label = expresionLine.label.Substring(0, expresionLine.label.Length - 1).Trim();
}
else
{
expresionLine.validLine = false;
Chronicler.LogError("Labels must end in a ':'");
}
if (expresionLine.validLine)
{
SymbolTable.ValidateLabel(expresionLine.label, currentLine, "pass one");
}
}
Regex commentChecker = new Regex(@"[\t ]*(?<com>;.*)");
Match comment = commentChecker.Match(currentLine);
if (comment.Success)
{
expresionLine.OriginalLine = currentLine;
expresionLine.locationCounter = 0;
expresionLine.label = "";
expresionLine.operation = "";
expresionLine.operandFieldAndComment = "";
expresionLine.lineNumber = lineNumber;
expresionLine.format4indicator = "";
expresionLine.CommentLine = true;
expresionLine.DeferExpresionResolutiontoPass2 = false;
skipOperandParsing = true;
expresionLines.Add(expresionLine);
}
else
{
if (dataStructures.opcodeTable.assemblerDirectives.Contains(expresionLine.operation))
{
switch (expresionLine.operation)
{
case "EQU":
skipOperandParsing = true;
expresionLine.IsEQU = true;
if (expresionLine.operandFieldAndComment[0] == '*' && expresionLine.validLine)
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
else if (expresionLine.validLine)
{
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
if (expresionLine.expresionData.first.HasValue)
{
int value = expresionLine.expresionData.first.Value.value;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.rflag.HasValue != true)
{
expresionLine.validLine = false;
}
if (expresionLine.validLine)
{
expresionLine.locationCounter = value;
dataStructures.symbolTable.addSymbol(expresionLine.label, expresionLine.expresionData.rflag.Value, value, currentLine);
}
else
{
Chronicler.LogError("Couldn't add \"" + currentLine + "\" to symbol table.", "pass one");
}
}
else
{
expresionLine.expresionData.rflag = expresionLine.expresionData.first.Value.RFlag;
if (expresionLine.validLine)
{
expresionLine.locationCounter = value;
dataStructures.symbolTable.addSymbol(expresionLine.label, expresionLine.expresionData.rflag.Value, value, currentLine);
}
else
{
Chronicler.LogError("Couldn't add \"" + currentLine + "\" to symbol table.", "pass one");
}
}
}
else
{
Chronicler.LogError("EQU can not be a literal value", "pass one");
expresionLine.validLine = false;
}
}
}
break;
case "BYTE":
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
skipOperandParsing = false;
if (expresionLine.expresionData.first.HasValue)
{
Chronicler.LogError("BYTE doesn't accept integer values", "pass one");
expresionLine.validLine = false;
}
else if (expresionLine.expresionData.literal != null)
{
if (expresionLine.expresionData.literal.isOldStyleLiteral)
{
if (expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
locationCounter += expresionLine.expresionData.literal.Length;
expresionLine.Opcode = expresionLine.expresionData.literal.hexValue;
}
else
{
expresionLine.validLine = false;
Chronicler.LogError("New style literals are not allowed in assembler directives");
}
}
}
break;
case "WORD":
expresionLine.DeferExpresionResolutiontoPass2 = true;
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
if (expresionLine.expresionData.first.HasValue)
{
int value = expresionLine.expresionData.first.Value.value;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
}
if (expresionLine.expresionData.rflag.HasValue != true)
{
expresionLine.validLine = false;
}
if (expresionLine.validLine && expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
if (expresionLine.validLine)
{
expresionLine.Opcode = value.ToString("X");
locationCounter += 3;
}
else
{
Chronicler.LogError("Couldn't parse \"" + currentLine + "\"", "pass one");
}
}
else if (expresionLine.expresionData.literal != null)
{
Chronicler.LogError("BYTE doesn't accept Charachter/Hex values", "pass one");
expresionLine.validLine = false;
}
}
break;
case "START":
skipOperandParsing = true;
Regex testBlankLine = new Regex(@"[\t ]*;.*");
if (expresionLine.operandFieldAndComment == "")
{
locationCounter = 0;
}
else if (testBlankLine.IsMatch(expresionLine.operandFieldAndComment))
{
locationCounter = 0;
}
else
{
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
Regex stripComment = new Regex(@"[\t ]*(?<min>-{0,1})[\t ]*(?<val>[0-9]+)[\t ]*(;.*){0,1}");
Match match1 = stripComment.Match(expresionLine.operandFieldAndComment);
if (match1.Success)
{
Globals.Symbol?tmp;
ExpresionHandler.ParseNum(match1.Groups["min"].Value + match1.Groups["val"].Value, out tmp, "(" + match1.Groups["min"].Value + match1.Groups["val"].Value + ")" + currentLine);
expresionLine.expresionData.comment = match1.Groups["$3"].Value;
if (tmp.HasValue && locationCounter == 0)
{
locationCounter = tmp.Value.value;
ExpresionLine.startLoc = locationCounter;
}
else
{
Chronicler.LogError("couldn't parse starting adress number, or start was not at beggining of the program", "Pass One");
}
}
else
{
expresionLine.validLine = false;
Chronicler.LogError("couldn't parse starting adress", "Pass One");
}
}
}
if (expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
break;
case "END":
skipOperandParsing = true;
testBlankLine = new Regex(@"[\t ]*;.*");
if (expresionLine.operandFieldAndComment == "")
{
locationCounter = 0;
}
else if (testBlankLine.IsMatch(expresionLine.operandFieldAndComment))
{
locationCounter = 0;
}
else
{
ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData);
if (expresionLine.expresionData.first.HasValue)
{
int value = expresionLine.expresionData.first.Value.value;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
}
if (expresionLine.expresionData.second.HasValue && expresionLine.expresionData.rflag.HasValue != true)
{
expresionLine.validLine = false;
}
if (expresionLine.validLine)
{
Globals.Symbol?symbol;
if (dataStructures.symbolTable.SearchSymbol(expresionLine.expresionData.first.Value.label, currentLine, out symbol))
{
programLength = locationCounter - symbol.Value.value;
}
}
else
{
Chronicler.LogError("Couldn't add \"" + currentLine + "\" to symbol table.", "pass one");
}
}
else
{
Chronicler.LogError("END can not be a literal value", "pass one");
expresionLine.validLine = false;
}
}
if (expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
break;
case "RESB":
skipOperandParsing = true;
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
if (expresionLine.expresionData.first.HasValue)
{
int value = expresionLine.expresionData.first.Value.value;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
}
if (expresionLine.validLine && expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
else
{
Chronicler.LogError("Couldn't add \"" + currentLine + "\" to symbol table.", "pass one");
}
if (expresionLine.validLine)
{
locationCounter += value;
}
}
else if (expresionLine.expresionData.literal != null)
{
Chronicler.LogError("BYTE doesn't accept Charachter/Hex values", "pass one");
expresionLine.validLine = false;
}
}
break;
case "RESW":
skipOperandParsing = true;
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
else
{
if (expresionLine.expresionData.first.HasValue)
{
int value = expresionLine.expresionData.first.Value.value;
if (expresionLine.expresionData.second.HasValue)
{
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.SUBTRACT)
{
value = (expresionLine.expresionData.first.Value.value) - expresionLine.expresionData.second.Value.value;
}
if (expresionLine.expresionData.operatorValue != null && expresionLine.expresionData.operatorValue == Globals.ExpresionData.Arithmetic.ADD)
{
value = (expresionLine.expresionData.first.Value.value) + expresionLine.expresionData.second.Value.value;
}
}
if (expresionLine.validLine && expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
else
{
Chronicler.LogError("Couldn't add \"" + currentLine + "\" to symbol table.", "pass one");
}
if (expresionLine.validLine)
{
locationCounter += value * 3;
}
}
else if (expresionLine.expresionData.literal != null)
{
Chronicler.LogError("BYTE doesn't accept Charachter/Hex values", "pass one");
expresionLine.validLine = false;
}
}
break;
case "EXTREF":
string[] arr = expresionLine.operandFieldAndComment.Split(',', StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < arr.Length; i++)
{
arr[i] = arr[i].Trim();
dataStructures.symbolTable.addSymbol(arr[i], false, 0, currentLine);
}
break;
default:
Chronicler.LogDetailedInfo("Doing: " + expresionLine.operation);
break;
}
}
else
{
opcodeTable.operationData operDat;
if (dataStructures.opcodeTable.operationTableDictionary.TryGetValue(expresionLine.operation, out operDat))
{
if (expresionLine.label != "")
{
dataStructures.symbolTable.addSymbol(expresionLine.label, true, locationCounter, currentLine);
}
switch (operDat.format)
{
case 1:
locationCounter += 1;
break;
case 2:
locationCounter += 2;
break;
case 3:
if (expresionLine.format4indicator == "")
{
locationCounter += 3;
}
else
{
locationCounter += 4;
}
break;
case 4:
locationCounter += 4;
break;
default:
break;
}
if (Parser.guessOperandType(expresionLine.operandFieldAndComment) == Parser.OperandType.DISPLACEMENT_OR_ADDRESS)
{
expresionLine.DeferExpresionResolutiontoPass2 = true;
}
else
{
expresionLine.DeferExpresionResolutiontoPass2 = false;
}
expresionLine.operationData = operDat;
}
else
{
expresionLine.operationData = null;
}
Chronicler.Write("Parsing operation: " + expresionLine.operation + "\n", Chronicler.OutputOptions.INFO);
}
}
if (expresionLine.validLine && skipOperandParsing != true && expresionLine.operandFieldAndComment != "" && !expresionLine.DeferExpresionResolutiontoPass2)
{
if (ExpresionHandler.ResolveF3F4Expresion(dataStructures, expresionLine.operandFieldAndComment, currentLine, out expresionLine.expresionData) != true)
{
expresionLine.validLine = false;
}
}
expresionLines.Add(expresionLine);
}
else
{
Chronicler.LogError("Couldn't parse fields on line: " + lineNumber);
}
}
}
}
catch (IOException e)
{
Chronicler.LogError("failed to open File: " + filePath);
}
}
}
catch (IOException e)
{
Chronicler.LogError("failed to open File: " + filePath);
}
dataStructures.literalTable.setStartAddress(locationCounter);
DumpIntermidiateFile(filePath, expresionLines, dataStructures);
}
//*******************************************************************************************
//*** FUNCTION ParseTerms
//*** ***************************************************************************************
//*** DESCRIPTION : parses an arithmatic operation str to a symbol, or add a literal
//*** INPUT ARGS : SymbolTable symbolTable, LiteralTable literalTable,
//*** string expresion, string currentLine
//*** OUTPUT ARGS : out Globals.Symbol? result
//*** IN/OUT ARGS : N/A
//*** RETURN : bool rtnVal
//*******************************************************************************************
static bool ParseTerms(Globals.DataStructures dataStructures, string expresionString, string currentLine, out Globals.ExpresionData expresionData)
{
bool rtnVal = true;
expresionString = expresionString.Trim();
expresionData = new Globals.ExpresionData();
Regex testForCommentOnlyLine = new Regex(@"^[\t ]*(;.*)$");
Match commentOnlyLine = testForCommentOnlyLine.Match(expresionString);
if (commentOnlyLine.Success)
{
expresionData.comment = commentOnlyLine.Groups["$1"].Value;
return(true);
}
string line = expresionString.Trim();
if (rtnVal == true && (Regex.Match(line, @"^[\t ]{0,}(-{0,1}[\t ]{0,}[A-Za-z0-9]+).*$").Success != true))
{
rtnVal = false;
Chronicler.LogError("Could not parse first(" + line + ") term in: " + currentLine, "parsing terms");
}
if (rtnVal == true && (Regex.Match(line, @"^[\t ]{0,}(-{0,1}[\t ]{0,}[A-Za-z0-9]+)[\t ]{0,}(([+-])[\t ]{0,}(-{0,1}[\t ]{0,}[A-Za-z0-9]+)){0,1}[\t ]{0,}(;.*){0,1}$").Success != true))
{
rtnVal = false;
Chronicler.LogError("Couldn't parse second term in: " + currentLine, "parsing terms");
}
string first = "";
string arithmaticOperator = "";
string second = "";
if (rtnVal == true)
{
Match fullLine = (Regex.Match(line, @"^[\t ]{0,}(?<first>-{0,1}[\t ]{0,}[A-Za-z0-9]+)[\t ]{0,}(?<testTermCount>(?<operand>[+-])[\t ]{0,}(?<second>-{0,1}[\t ]{0,}[A-Za-z0-9]+)){0,1}[\t ]{0,}(;.*){0,1}$"));
if (fullLine.Success != true)
{
rtnVal = false;
Chronicler.WriteLine("Error parsing literal");
}
first = fullLine.Groups["first"].Value.Trim();
arithmaticOperator = fullLine.Groups["operand"].Value.Trim();
second = fullLine.Groups["second"].Value.Trim();
Regex stripWhiteSpace = new Regex(@"\s+");
first = stripWhiteSpace.Replace(first, "");
arithmaticOperator = stripWhiteSpace.Replace(arithmaticOperator, "");
second = stripWhiteSpace.Replace(second, "");
if (second != "" && arithmaticOperator == "")
{
rtnVal = false;
}
}
if (rtnVal == true)
{
rtnVal = ParseTerm(dataStructures.symbolTable, first, out expresionData.first, currentLine);
if (second != "")
{
rtnVal = ParseTerm(dataStructures.symbolTable, second, out expresionData.second, currentLine);
if (expresionData.first.HasValue && expresionData.second.HasValue)
{
if (arithmaticOperator == "+")
{
expresionData.rflag = Globals.Symbol.AddRFlags(expresionData.first.Value, expresionData.second.Value);
expresionData.operatorValue = Globals.ExpresionData.Arithmetic.ADD;
}
else if (arithmaticOperator == "-")
{
expresionData.rflag = Globals.Symbol.SubtractRFlags(expresionData.first.Value, expresionData.second.Value);
expresionData.operatorValue = Globals.ExpresionData.Arithmetic.SUBTRACT;
}
else
{
rtnVal = false;
Chronicler.LogError("Invalid operator value for line: " + currentLine, "term arithmatic module");
}
}
else
{
Chronicler.LogError("Couldn't resolve symbols in artithmetic: " + currentLine, "term arithmatic module");
}
rtnVal = rtnVal == true?ParseTerm(dataStructures.symbolTable, second, out expresionData.second, currentLine) : false;
}
if (expresionData.first.HasValue && !expresionData.second.HasValue && second == "")
{
expresionData.rflag = expresionData.first.Value.RFlag;
}
}
return(rtnVal);
}
public static bool ParseOldStyleLiteral(string operand, out LiteralTable.LiteralValue literalValue, out string comment, string callingModule = "")
{
Regex literalRegex = new Regex(@"(^[\t ]*(?<literalCharID>[Cc])[\t ]*(?<literalValueString>'.*')[\t ]*(?<comment>;.*){0,1}$)|(^[\t ]*(?<literalCharIDx>[Xx])[\t ]*(?<literalValueStringx>'[a-fA-F0-9]*')[\t ]*(?<commentx>;.*){0,1}$)");
Match match = literalRegex.Match(operand);
literalValue = new LiteralTable.LiteralValue();
comment = "";
if (match.Success)//if we succeed, format it
{
literalValue.isOldStyleLiteral = true;
if (match.Groups["literalCharID"].Value != "")
{
literalValue.label = match.Groups["literalCharID"].Value + match.Groups["literalValueString"].Value;
comment = match.Groups["comment"].Value;
StringBuilder sb = new StringBuilder(literalValue.label);
sb[0] = 'C';
literalValue.label = sb.ToString();
char[] tmpArr = literalValue.label.Substring(2, literalValue.label.Length - 3).ToCharArray();
literalValue.hexValue = Globals.CharArrToHexStr(tmpArr);
literalValue.dataType = LiteralTable.LiteralValue.DataType.CHAR;
}
else
{
literalValue.label = match.Groups["literalCharIDx"].Value + match.Groups["literalValueStringx"].Value;
comment = match.Groups["commentx"].Value;
literalValue.label = literalValue.label.ToUpper();
literalValue.hexValue = literalValue.label.Substring(2, literalValue.label.Length - 3);
literalValue.hexValue = (literalValue.hexValue.Length % 2 == 1 ? "0" : "") + literalValue.hexValue;
literalValue.dataType = LiteralTable.LiteralValue.DataType.HEX;
}
return(true);
}
//if we fail try to figure out how and provide detailed feedback
StringBuilder operandMutaion = new StringBuilder(operand.Trim());
callingModule = callingModule == "" ? "Parse Old Style Literal" : callingModule;
if (operandMutaion.Length == 0)
{
Chronicler.LogError("No literal value was given", callingModule);
}
operandMutaion[0] = char.ToUpper(operandMutaion[0]);
bool isChar = false;
if (operandMutaion[0] != 'C' && operandMutaion[0] == 'X')
{
Chronicler.LogError("The charachter '" + operandMutaion[0] + "' is not a valid literal identifier. Valid identifiers are 'XxCc'.", callingModule);
return(false);
}
else if (operandMutaion[0] == 'C')
{
isChar = true;
}
//remove whitespace
while (operandMutaion.Length > 2 && char.IsWhiteSpace(operandMutaion[1]))
{
operandMutaion = operandMutaion.Remove(1, 1);
}
if (operandMutaion[1] != '\'')
{
Chronicler.LogError("Was expecting ''', but found '" + operandMutaion[1] + "'", callingModule);
return(false);
}
int lastApos = -1;
for (int i = 2; i < operandMutaion.Length; i++)
{
if (operandMutaion[i] == '\'')
{
lastApos = i;
}
}
if (lastApos == -1)
{
Chronicler.LogError("Was unable to find closing '''", callingModule);
return(false);
}
else
{
string subStr = operandMutaion.ToString().Substring(2, lastApos - 2);
if (!isChar)
{
char?errorChar;
if (!validateHex(subStr, out errorChar) && errorChar != '\'')
{
Chronicler.LogError("Invalid Hex char detected in hex literal: " + errorChar.Value, callingModule);
return(false);
}
else
{
lastApos = -1;
for (int i = 2; i < operandMutaion.Length && lastApos == -1; i++)
{
if (operandMutaion[i] == '\'')
{
lastApos = i;
}
}
}
}
int lastComma = operandMutaion.Length;
for (int i = lastApos; i < operandMutaion.Length && lastComma == operandMutaion.Length; i++)
{
if (operandMutaion[i] == ';')
{
lastComma = i;
}
}
subStr = operandMutaion.ToString().Substring(lastApos, lastComma - lastApos);
Chronicler.LogError("Parsing literal failed; was their garbage after the literal before the comment? Found:(" + subStr + ")", callingModule);
return(false);
}
}