public ProgState execute(ProgState state)
{
MyIntDict <String, int> symtable = state.getSymTable();
IntFileTable filetable = state.getFileTable();
if (!symtable.exists(exp_file_id))
{
throw new MyException.MyException("File descriptor not found!");
}
int index_file = symtable.get(exp_file_id);
if (!filetable.exists(index_file))
{
throw new MyException.MyException("File descriptor does not exist!");
}
StreamReader reader = filetable.get(index_file).Item2;
try {
reader.Close();
} catch (IOException e) {
throw new MyException.MyException("File can not be close!");
}
filetable.remove(index_file);
return(null);
}
public override int eval(MyIntDict <String, int> tab)
{
try {
return(tab.get(id));
}
catch (MyException.MyException ex) {
throw ex;
}
}
public ProgState execute(ProgState state)
{
MyIntDict <String, int> symtable = state.getSymTable();
IntFileTable filetable = state.getFileTable();
if (!symtable.exists(exp_file_id))
{
throw new MyException.MyException("File descriptor not found!");
}
int index_file = symtable.get(exp_file_id);
if (!filetable.exists(index_file))
{
throw new MyException.MyException(("File descriptor does not exist!"));
}
StreamReader reader = filetable.get(index_file).Item2;
String line;
try {
line = reader.ReadLine();
} catch (IOException e) {
line = "";
}
int value = 0;
if (line != "")
{
value = Int32.Parse(line);
}
if (symtable.exists(var_name))
{
symtable.update(var_name, value);
}
else
{
symtable.add(var_name, value);
}
return(null);
}