/*******************************************************************************
*** PASSUNO function ***
********************************************************************************
*** DESCRIPTION: This Pass 1 funciton takes in information from the file ***
*** passed in. In the file contains assembly instructions and pass one ***
*** produces line numbers and load counters. Pass 1 also stores the labels ***
*** as symbols and also store literals in the literal table. ***
********************************************************************************
*** INPUT ARGS: string program, List<Node_Op> OpCodes ***
*** OUTPUT ARGS: N/A ***
*** IN/OUT ARGS: N/A ***
*** RETURN: Node_P1 p1 ***
********************************************************************************/
public Node_P1 PassUno(string program, List <Node_Op> OpCodes)
{
Node_P1 passOne = new Node_P1();
PassTwo p2 = new PassTwo();
List <string> theFile = new List <string>();
List <int> valLits = new List <int>();
OpCodes opCode = new OpCodes();
Symbol_Table SymTab = new Symbol_Table();
Expressions Exp = new Expressions();
Literal_Table LitTable = new Literal_Table();
Node_Lit lit = new Node_Lit();
Node_Sym table = new Node_Sym();
Node_Op op = new Node_Op();
Node_Exp ex = new Node_Exp();
List <string> Literals = new List <string>();
string[] Prog = File.ReadAllLines(program);
string[] splitLine;
string str_Count = null;
string tmpCounter = null;
string label = null;
string operation = null;
string operand = null;
int l = 0;
string Counter = "00000";
string EquCount = null;
string tmpStr;
int val;
int tmp;
bool r = true;
foreach (string line in Prog)
{
//HANDLE IF EMPTY LINE
if (line != null)
{
//COMMMENT HANDLING
if (line[0] != '.')
{
tmpStr = line;
//SPLITS THE LINE
splitLine = tmpStr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
//SETS LABEL
if (splitLine.Length >= 3)
{
label = splitLine[0].ToUpper();
splitLine = splitLine.Where(w => w != splitLine[0]).ToArray();
}
else
{
tmpStr = splitLine[0];
if (tmpStr[0] != '+' && opCode.search(OpCodes, tmpStr) == null && tmpStr != "BASE" && tmpStr != "BYTE" && tmpStr != "END" && tmpStr != "EQU" && tmpStr != "EXTDEF" && tmpStr != "EXTREF" && tmpStr != "RESB" && tmpStr != "RESW" && tmpStr != "START" && tmpStr != "WORD")
{
label = splitLine[0].ToUpper();
splitLine = splitLine.Where(w => w != splitLine[0]).ToArray();
}
}
//SETS OPERTATION
operation = splitLine[0].ToUpper();
//SETS OPERAND
if (splitLine.Length > 1)
{
operand = splitLine[1];
}
//SETS LINE NUMBER
l++;
if (operation != "EQU")
{
tmpCounter = Counter;
}
//IF START, THEN START; IF NOT END, THEN DO STUFF
if (operation == "START")
{
Counter = operand.PadLeft(5, '0');
str_Count = Counter;
}
else if (operation != "END")
{
//FORMAT 4 CHECK
if (operation[0] != '+')
{
op = opCode.search(OpCodes, operation);
}
else
{
tmpStr = operation.TrimStart('+');
op = opCode.search(OpCodes, tmpStr);
op.format = "4";
}
if (op == null)
{
if (operation == "WORD")
{
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + 3;
Counter = val.ToString("X").PadLeft(5, '0');
}
else if (operation == "RESW")
{
if (int.TryParse(operand, out tmp))
{
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + (tmp * 3);
Counter = val.ToString("X").PadLeft(5, '0');
}
}
else if (operation == "RESB")
{
if (int.TryParse(operand, out tmp))
{
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + tmp;
Counter = val.ToString("X").PadLeft(5, '0');
}
}
else if (operation == "BYTE")
{
tmpStr = operand;
if (tmpStr[0] == 'C')
{
tmpStr = tmpStr.TrimStart('C', '\'');
tmpStr = tmpStr.TrimEnd('\'');
tmp = tmpStr.Length;
}
else
{
tmpStr = tmpStr.TrimStart('X', '\'');
tmpStr = tmpStr.TrimEnd('\'');
tmp = tmpStr.Length / 2;
}
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + tmp;
Counter = val.ToString("X").PadLeft(5, '0');
}
else if (operation == "BASE")
{
}
else if (operation == "EQU")
{
if (operand == "*")
{
EquCount = Counter;
}
//IF OPERAND IS A DECIMAL VALUE
else if (int.TryParse(operand, out tmp))
{
EquCount = tmp.ToString("X").PadLeft(5, '0');
r = false;
}
//IF OPERAND IS AN EXPRESSION
else
{
ex = Exp.insert(table, operand);
if (int.TryParse(ex.value, out tmp))
{
EquCount = tmp.ToString("X").PadLeft(5, '0');
r = ex.relocatable;
}
}
}
else if (operation == "EXTDEF")
{
r = false;
}
else if (operation == "EXTREF")
{
r = false;
}
}
else
{
if (operation[0] != '+')
{
if (int.TryParse(op.format, out tmp))
{
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + tmp;
Counter = val.ToString("X").PadLeft(5, '0');
}
}
else
{
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + 4;
Counter = val.ToString("X").PadLeft(5, '0');
}
}
}
if (operand != null)
{
if (operand[0] == '=')
{
Literals.Add(operand);
}
}
if (EquCount == null)
{
theFile.Add(string.Format("{0,-4} {1,-10} {2,-10} {3,-10} {4,-15}", l, tmpCounter, label, operation, operand));
if (label != null)
{
table = SymTab.insert(table, label, tmpCounter, r);
}
}
else
{
theFile.Add(string.Format("{0,-4} {1,-10} {2,-10} {3,-10} {4,-15}", l, EquCount, label, operation, operand));
if (label != null)
{
table = SymTab.insert(table, label, EquCount, r);
}
}
EquCount = null;
r = true;
label = null;
operand = null;
}
}
}
if (Literals != null)
{
foreach (string oper in Literals)
{
l++;
tmpCounter = Counter;
lit = LitTable.insert(lit, oper, Counter);
val = int.Parse(Counter, System.Globalization.NumberStyles.HexNumber) + lit.length;
Counter = val.ToString("X").PadLeft(5, '0');
valLits.Add(lit.length);
theFile.Add(string.Format("{0,-4} {1,-10} {2,-10} {3,-10} {4,-15}", l, tmpCounter, "*", oper, ""));
}
}
passOne.length = p2.SubHex(Counter, str_Count);
theFile.Add(passOne.length);
passOne.table = table;
passOne.lit = lit;
passOne.prog = theFile;
return(passOne);
}
