public PrgState Execute(PrgState state)
{
try
{
int val = exp_file_id.Eval(state.GetSymTable());//what to eval
MyPair <String, StreamReader> entry = state.GetFileTable().Lookup(val);
entry.GetSecond().Close();
state.GetFileTable().Delete(val, entry);
}
catch (Exception e)
{
throw new MyException("Something went wrong!");
}
return(state);
}
public PrgState Execute(PrgState state)
{
MyIDictionary <String, int> symTable = state.GetSymTable();
int file_id = this.exp_file_id.Eval(symTable);
MyIPair <String, StreamReader> fileTable = state.GetFileTable().Lookup(file_id);
if (fileTable == null)
{
throw new MyException("File not opened");
}
int anotherVal;
String line = fileTable.GetSecond().ReadLine();
if (line == null)
{
anotherVal = 0;
}
else
{
anotherVal = System.Convert.ToInt32(line);
}
if (symTable.IsDefinedU(var_name))
{
symTable.Update(var_name, anotherVal);
}
else
{
symTable.Add(var_name, anotherVal);
}
return(state);
}
public PrgState Execute(PrgState state)
{
MyIDictionary <int, MyPair <String, StreamReader> > fileTable = state.GetFileTable();
foreach (MyIPair <String, StreamReader> ff in fileTable.Values())
{
if (ff.GetFirst().Equals(this.filename))
{
throw new MyException("File already used");
}
}
MyIDictionary <String, int> symTable = state.GetSymTable();
StreamReader streamReader = new StreamReader(this.filename);
int unq = ran++;
MyPair <String, StreamReader> tup = new MyPair <String, StreamReader>(this.filename, streamReader);
fileTable.Add(unq, tup);
symTable.Add(var_file_id, unq);
return(state);
}