private void Verify_Offset2(int list_index, string offset) //offeset represent label ,adress of label
{
//ADRESARE IMEDIATA la adresa data de eticheta
try
{
string signed_value_to_be_written = null;
new_type label_state = new new_type(Labels[offset]);//here i will get adress of brench
//if label adress is smaller than brench adress=>-offset
if (Convert.ToUInt16((list_index)) > Convert.ToUInt16(label_state.GetAdress()))
{
signed_value_to_be_written = toSignedBinary8(Convert.ToUInt16((list_index + 2) - label_state.GetAdress()));
}
//if label adress is bigger than brench =>+offset
else if (Convert.ToUInt16((list_index)) < Convert.ToUInt16(label_state.GetAdress()))
{
signed_value_to_be_written = toBinary8(Convert.ToUInt16(label_state.GetAdress() - (list_index + 2)));
}
string value_to_be_written = signed_value_to_be_written;
BinaryElements[list_index] = BinaryElements[list_index] + value_to_be_written;
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error in the assembler file", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void Verify_Offset(string opcode, int list_index, string offset)//offeset represent label ,adress of label
{
//ADRESARE IMEDIATA la adresa data de eticheta
try
{
string signed_value_to_be_written = null;
new_type label_state = new new_type(Labels[offset]);
index = GetNumeberOfLocationWritten(BinaryElements);
if (Convert.ToUInt16((index + 2)) > Convert.ToUInt16(label_state.GetAdress()))
{
signed_value_to_be_written = toSignedBinary8(Convert.ToUInt16((index + 2) - label_state.GetAdress()));
}
else if (Convert.ToUInt16((index + 2)) < Convert.ToUInt16(label_state.GetAdress()))
{
signed_value_to_be_written = toBinary8(Convert.ToUInt16(label_state.GetAdress() - (index + 2)));
}
//else
//{
// signed_value_to_be_written = toBinary8(Convert.ToUInt16(index - Labels[offset]));
//}
string value_to_be_written = opcode + signed_value_to_be_written;
BinaryElements[list_index] = value_to_be_written;
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error in the assembler file", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
private void ConvertASMButton_Click(object sender, EventArgs e)
{
try
{
GetOpcode(asmGlobalElements);
foreach (KeyValuePair <string, new_type> kvp in Brench)
{
new_type brench_status = new new_type(kvp.Value);
if (brench_status.GetState() == false)
{
Verify_Offset2(brench_status.GetAdress(), kvp.Key);
kvp.Value.SetState(true);
}
}
DisplayBinaryCodeArray(BinaryElements);
WriteBinary(); //writing instruction in to binary output file
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
public new_type(new_type param)
{
this.address = param.address;
this.state = param.state;
}
public void GetOpcode(List <String> asmElements)
{
bool classB1 = false;
bool classB2 = false;
bool classB3 = false;
bool classB4 = false;
bool register = false;
bool number = false;
bool label = false;
//contor used to save the number of instruction in list
//index used like PC
for (int i = 0; i < asmGlobalElements.Count();)
{
String s = asmGlobalElements[i];
if (B1.ContainsKey(s))
{
classB1 = true;
string value = B1[s];
int old_contor = contor;
Verify_First_Operand(value, contor, asmGlobalElements[i + 1]);
string value2 = BinaryElements[old_contor];
Verify_Second_Operand(value2, old_contor, asmGlobalElements[i + 2]);
i += 3;//used to go to the next instruction element
contor += 2;
}
//instructiuni cu un singur operand
else if (B2.ContainsKey(s))
{
classB2 = true;
// OPCODE.Add(s);
String value = B2[s];
// binaryElements.Insert(contor, value);
Verify_First_Operand(value, contor, asmGlobalElements[i + 1]);
// OutputTextBox2.Text += "stringul este de clasa B2 " + classB2 + " " + s +" Value:"+value +Environment.NewLine;
i += 2;
contor += 2;
}
//instructiuni de salt
else if (B3.ContainsKey(s))
{
classB3 = true;
String value = B3[s];
string offset = asmGlobalElements[i + 1];
bool state = Labels[offset].GetState();
if (Labels.ContainsKey(offset) && (state == true))
{
Verify_Offset(value, contor, offset);
}
else
{
BinaryElements[contor] = value;
new_type brench_state = new new_type(contor, false);
Brench.Add(offset, brench_state);//saving those brench that do not have declared an label yet
}
i += 2;
//index += 2;//used to go to the next instruction element
contor += 2;//used to now at which instruction we are
}
//instructiuni diverse
else if (B4.ContainsKey(s))
{
classB4 = true;
// OPCODE.Add(s);
String value = B4[s];
//binaryElements.Insert(contor,value);
BinaryElements[contor] = value;
i++;
// index += 1;//used to go to the next instruction element
contor += 2; //used to now at which instruction we are
}
if (classB1 == false && classB2 == false && classB3 == false & classB4 == false)
{
if (Labels.ContainsKey(s))
{
new_type label_state = new new_type(contor, true);
Labels[s] = label_state; //reactualize data for labels(adress depending on actual program size and state
label_state = Labels[s]; //get data(adress ,state)
int adress_to_jump = label_state.GetAdress();
BinaryElements[contor] = toBinary16(adress_to_jump);
contor += 2;
label = true;
i++;
}
}
classB1 = false;
classB2 = false;
classB3 = false;
classB4 = false;
label = false;
}
}
private void ParseFileButton_Click(object sender, EventArgs e)
{
try
{
/* local variable used for debugging only */
int lineCounter = 0;
/* List which will store each token (element) read from ASM file */
List <String> asmElements = new List <String>();
/* Create a parser object used for ASM file
* REMEMBER: this parser can be used for all kind of text files!!!
*/
TextFieldParser parser = new TextFieldParser(filename);
/* Reinitialize the Text property of OutputTextBox */
OutputTextBox.Text = "";
/* Define delimiters in ASM file */
String[] delimiters = { ",", " " };
/* Specify that the elements in ASM file are delimited by some characters */
parser.TextFieldType = FieldType.Delimited;
/* Set-up the specified delimiters */
parser.SetDelimiters(delimiters);
/* Parse the entire ASM file based on previous specifications*/
while (!parser.EndOfData)
{//here was pc-2
PC += 2;
/* Read an entire line in ASM file
* and split this line in many strings delimited by delimiters */
string[] asmFields = parser.ReadFields();
/* Store each string as a single element in the list
* if this string is not empty */
foreach (string s in asmFields)
{
if (!s.Equals(""))
{
if (s.EndsWith(":"))
{//here was pc-2
new_type label_state = new new_type(PC - 2, false);
Labels.Add(s.Split(':')[0], label_state);
asmElements.Add(s.Split(':')[0]);
asmGlobalElements.Add(s.Split(':')[0]);
}
else
{
asmElements.Add(s);
//add in to a global list parsed elements of asm file
asmGlobalElements.Add(s);
}
}
}
/* Counting the number of lines stored in ASM file */
lineCounter++;
}
/* Close the parser */
parser.Close();
/* If the file is empty, trigger a new exception which
* in turn will display an error message */
if (lineCounter == 0)
{
Exception exc = new Exception("The ASM file is empty!");
throw exc;
}
else
{
/* Display every token in OutputTextBox */
foreach (String s in asmElements)
{
OutputTextBox.Text += s + Environment.NewLine;
}
/* Display an information about the process completion */
MessageBox.Show("Parsing is completed!", "Assembler information", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
//verifying if there is any elements in global list ,if the initial asm file have been parsed
if (asmGlobalElements.Count() != 0)
{
ConvertASMButton.Enabled = true;
}
else
{
ConvertASMButton.Enabled = false;
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
