/*******************************************************************
*** FUNCTION PassOne ***
********************************************************************
*** DESCRIPTION: Displays the symbol, contsect, and memory map ***
*** INPUT ARGS: string[][] program ***
*** OUTPUT ARGS: symboltable ***
*** IN/OUT ARGS: NONE ***
*** RETURN: int ExSymTab ***
********************************************************************/
public static ExSymbolTable PassOne(string[][] program)
{
int ContSectLength = 0;
var ExSymTab = new ExSymbolTable();
foreach (var prog in program)
{
foreach (var instruct in prog)
{
if (instruct[0] == 'H')
{
string ContSectLabel = instruct.Substring(1, 6);
ContSectLabel = ContSectLabel.Replace(" ", "");
int ContSectSAddress = Program.contSectAddress;
try
{ ContSectLength = int.Parse(instruct.Substring(13, 6), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Control Section Length - " + instruct.Substring(13, 6)); }
ExSymTab.ContSectList.Add(ContSectLabel, new int[] { ContSectSAddress, ContSectLength });
}
else if (instruct[0] == 'D')
{
int DCount = instruct.Substring(1).Length / 10;
for (int i = 0; i < DCount; i++)
{
string SymLabel = instruct.Substring(i * 11 + 1 + i, 6).Replace(@" ", "");
string FirstOffset = instruct.Substring(i * 11 + 7 + i, 6);
var SymOffset = 0;
try
{ SymOffset = int.Parse(FirstOffset, NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Symbol Offset - " + FirstOffset); }
var SymAddress = Program.contSectAddress + SymOffset;
ExSymTab.SymList.Add(SymLabel, new int[] { SymAddress, SymOffset });
}
}
else if (instruct[0] == 'R')
{
int RCount = instruct.Substring(1).Length / 6 + 1;
for (int i = 0; i < RCount; i++)
{
string SymlLabel;
if (instruct.Substring(i * 6 + 1).Length >= 6)
{
SymlLabel = instruct.Substring(i * 6 + 1, 6).Replace(@" ", "");
}
else
{
SymlLabel = instruct.Substring(i * 6 + 1).Replace(@" ", "");
}
var SymOffset = 0; //temporary offset until the modification record
var SymAddress = Program.contSectAddress + SymOffset;
ExSymTab.SymList.Add(SymlLabel, new int[] { SymAddress, SymOffset });
}
}
else if (instruct[0] == 'E')
{
if (instruct.Length > 1)
{
string exAddress = instruct.Substring(1, 6);
int temp = 0;
try
{ temp = int.Parse(exAddress, NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Execution address - " + exAddress); }
Program.exAdd = Program.startMemory + temp;
}
Program.contSectAddress += ContSectLength;
Program.length += ContSectLength;
}
}
}
return(ExSymTab);
}
/*******************************************************************
*** FUNCTION PassTwo ***
********************************************************************
*** DESCRIPTION: Pass 2 of the linkingloader ***
*** INPUT ARGS: string[][] program, ExSymbolTable ExSymTab ***
*** OUTPUT ARGS: NONE ***
*** IN/OUT ARGS: NONE ***
*** RETURN: int memMap ***
********************************************************************/
public static Dictionary <int, string> PassTwo(string[][] program, ExSymbolTable ExSymTab)
{
int ContSectAddress = Program.startMemory;
int ContSectLength = 0;
string ContSectLabel = string.Empty;
Dictionary <int, string> memMap = new Dictionary <int, string>();
foreach (var prog in program)
{
foreach (var instruct in prog)
{
if (instruct[0] == 'H')
{
ContSectLabel = instruct.Substring(1, 6);
ContSectLabel = ContSectLabel.Replace(@" ", "");
try
{ ContSectLength = int.Parse(instruct.Substring(13, 6), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Control Section Length - " + instruct.Substring(13, 6)); }
for (int i = 0; i < ContSectLength; i++)
{
memMap[i + ContSectAddress] = "UU";
}
}
else if (instruct[0] == 'T')
{
int TAdd = 0;
int TLength = 0;
try
{ TAdd = int.Parse(instruct.Substring(1, 6), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Text Record Address - " + instruct.Substring(1, 6)); }
try
{ TLength = int.Parse(instruct.Substring(7, 2), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("|ERROR|| Text Record Length - " + instruct.Substring(7, 2)); }
string TRec = instruct.Substring(9, instruct.Length - 9);
int memAdd = ContSectAddress + TAdd;
for (int i = 0; i < TLength; i++)
{
memMap[memAdd] = TRec.Substring(i * 2, 2);
memAdd += 1;
}
}
else if (instruct[0] == 'M')
{
int MAdd = 0, length = 0, value = 0;
try
{ MAdd = int.Parse(instruct.Substring(1, 6), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Modification Record Address - " + instruct.Substring(1, 6)); }
int memAdd = ContSectAddress + MAdd;
string Nib = memMap[memAdd] + memMap[memAdd + 1] + memMap[memAdd + 2];
if (ExSymTab.ContSectList.ContainsKey(ContSectLabel))
{
int[] tempAdd = ExSymTab.ContSectList[ContSectLabel];
}
try
{ length = int.Parse(instruct.Substring(7, 2), NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Modification Record Length - " + instruct.Substring(7, 2)); }
if (length == 5)
{
Nib = Nib.Substring(1);
}
try
{ value = int.Parse(Nib, NumberStyles.HexNumber); }
catch (FormatException)
{ Console.WriteLine("||ERROR|| Modification Record Value - " + Nib); }
string SymLabel = instruct.Substring(10);
SymLabel = SymLabel.Replace(@" ", "");
int SymAddress;
if (!ExSymTab.ContSectList.ContainsKey(SymLabel))
{
SymAddress = ExSymTab.SymList[SymLabel][0];
}
else
{
SymAddress = ExSymTab.ContSectList[SymLabel][0];
}
char sign = instruct[9];
if (sign == '+')
{
value += SymAddress;
}
else if (sign == '-')
{
value -= SymAddress;
}
Nib = value.ToString("X");
if (length == 5)
{
string temp = "";
temp += memMap[memAdd][0].ToString();
Nib = AddLeft(Nib, 5);
Nib = temp + Nib;
}
else
{
Nib = AddLeft(Nib, 6);
}
memMap[memAdd] = Nib.Substring(0, 2);
memMap[memAdd + 1] = Nib.Substring(2, 2);
memMap[memAdd + 2] = Nib.Substring(4, 2);
}
}
ContSectAddress += ContSectLength;
}
return(memMap);
}
