public void HandleAssignment(ASTNode node)
{
string variableName = node.Descendants[0].Token.Text;
int variableScope = SemanticAnalyser.VariableChecker.FindSymbol(node.Descendants[0], node.AppearsInScope);
TempTableEntry variableTemp = StaticTemp.GetTempTableEntry(variableName, variableScope);
string type = variableTemp.Type;
string[] tempAddressBytes = variableTemp.Address.Split(" ");
switch (type)
{
case "int":
HandleIntegerAssignment(node, variableScope, tempAddressBytes);
break;
case "boolean":
HandleBooleanAssignment(node, variableScope, tempAddressBytes);
break;
case "string":
HandleStringAssignment(node, variableScope, tempAddressBytes);
break;
}
node.Descendants[0].Visited = true;
node.Descendants[1].Visited = true;
}
public void HandlePrintIdentifier(ASTNode node)
{
TempTableEntry staticEntry = StaticTemp.GetTempTableEntry(node.Token.Text, node.ReferenceScope);
string variableType = staticEntry.Type;
string[] tempAddressBytes = staticEntry.Address.Split(" ");
switch (variableType)
{
case "int":
Image.WriteByte("AC");
Image.WriteByte(tempAddressBytes[0]);
Image.WriteByte(tempAddressBytes[1]);
Image.WriteByte("A2");
Image.WriteByte("01");
Image.WriteByte("FF");
break;
case "boolean":
HandlePrintBoolean((int)EvaluateBooleanSubtree(node));
break;
case "string":
HandlePrintString(node);
break;
}
}
public void BackPatch(TempTableEntry variable, string address)
{
string[] splitAddress = address.Split(" ");
for (int i = 0; i < Bytes.GetLength(0); i++)
{
for (int j = 0; j < Bytes.GetLength(1); j++)
{
if (j + 1 < Bytes.GetLength(1))
{
if ($"{Bytes[i,j]} {Bytes[i, j+1]}" == variable.Address)
{
Bytes[i, j] = splitAddress[0];
Bytes[i, j + 1] = splitAddress[1];
}
}
else
{
if (i + 1 < Bytes.GetLength(0))
{
if ($"{Bytes[i,j]} {Bytes[i + 1, 0]}" == variable.Address)
{
Bytes[i, j] = splitAddress[0];
Bytes[i + 1, 0] = splitAddress[1];
}
}
}
}
}
// handle inserting the value of the variable into the stack once backpatching has been performed
string[] splitValue = variable.Value.Split(" ");
for (int i = 0; i < splitValue.Length; i++)
{
this.WriteByte(splitValue[i]);
}
variable.BackPatch(address);
}
