public PrgState execute(PrgState state)
{
int fd = this.exp.evaluate(state.getSymTable());
Tuple <String, TextReader> act = state.getFileTable().get(fd);
if (act == null)
{
throw new Exception("FileNotOpened Exception at: " + this.ToString() + "\nThere is no opened file with fd = " + fd);
}
act.Item2.Close();
state.getFileTable().remove(fd);
return(state);
}
public PrgState execute(PrgState prgState)
{
var fileTable = prgState.getFileTable();
foreach (Tuple <string, TextReader> act in fileTable.values())
{
if (act.Item1 == this.fileName)
{
throw new Exception("already opened wtf?");
}
}
TextReader t = File.OpenText(this.fileName);
int actFd = ++OpenRFileStmt.fd; /// static variable
prgState.getFileTable().put(actFd, new Tuple <String, TextReader>(this.fileName, t));
prgState.getSymTable().put(this.varId, actFd);
return(prgState);
}
public PrgState execute(PrgState state)
{
int fd = this.exp.evaluate(state.getSymTable());
Tuple <String, TextReader> br = state.getFileTable().get(fd);
if (br == null)
{
throw new Exception("FileNotOpenedException at: " + this.ToString() + "\nNo such file descriptor: " + fd.ToString());
}
String line = br.Item2.ReadLine();
int val = 0;
if (line != null)
{
val = int.Parse(line);
}
state.getSymTable().put(this.var, val);
return(state);
}