/* @Override */
public PrgState execute(PrgState state)
{
Dictionary <int, MyFile> fileTable = state.getFileTable();
Dictionary <String, int> symTable = state.getSymTable();
int fd = 0;
try {
fd = this.fd.eval(symTable);
} catch (Exception e) {
Console.Write("Could not evaluate expression: %s\n", this.fd.toString());
Console.Write(e);
Environment.Exit(1);
}
StreamReader reader = fileTable[fd].getReader();
if (reader == null)
{
Console.Write("File descriptor %d does not exist.\n", fd);
Environment.Exit(1);
}
try {
reader.Close();
} catch (Exception e) {
Console.Write("Could not close reader. Moving on.", fd);
Console.Write(e);
}
fileTable.Remove(fd);
return(state);
}
/* @Override */
public PrgState execute(PrgState state)
{
Dictionary <int, MyFile> fileTable = state.getFileTable();
Dictionary <String, int> symTable = state.getSymTable();
int fd = this.fd.eval(symTable);
if (!fileTable.ContainsKey(fd))
{
Console.Write("File descriptor %d does not exist.\n", fd);
Environment.Exit(1);
}
StreamReader reader = fileTable[fd].getReader();
int val;
try {
val = Int32.Parse(reader.ReadLine());
} catch (Exception e) {
Console.Write(e);
val = 0;
}
symTable[target_var] = val;
return(state);
}
/* @Override */
public PrgState execute(PrgState state)
{
Dictionary <int, MyFile> fileTable = state.getFileTable();
Dictionary <String, int> symTable = state.getSymTable();
foreach (MyFile entry in fileTable.Values)
{
if (entry.getFilename() == this.filename)
{
Console.WriteLine("File is already open");
Environment.Exit(1);
}
}
try {
StreamReader reader = new StreamReader(this.filename);
// Assign the first unused file descriptor to this file.
for (int fd = 3; ; fd++)
{
if (!fileTable.ContainsKey(fd))
{
fileTable[fd] = new MyFile(this.filename, reader);
symTable[variable] = fd;
break;
}
}
} catch (IOException e) {
Console.Write("Could not open %s for reading.\n", this.filename);
Console.Write(e.ToString());
Environment.Exit(1);
}
return(state);
}
public void logPrgStateExec()
{
/*
* try {
* // TODO: first file open overwrites file.
* PrintWriter logFile = new PrintWriter(new BufferedWriter(new FileWriter(this.logFilePath, true)));
*
* logFile.println(this.getCurrentState().toString());
* logFile.close();
* } catch(Exception e) {
* System.err.println(e);
* throw e;
* }*/
PrgState state = getCurrentState();
using (StreamWriter logFile = new StreamWriter(logFilePath, true)) {
try {
logFile.WriteLine("Execution Stack\n");
foreach (IStmt statement in state.getExeStack())
{
logFile.WriteLine(" " + statement + "\n");
}
logFile.WriteLine("\n");
logFile.WriteLine("Symbol Table\n");
foreach (KeyValuePair <string, int> entry in state.getSymTable())
{
logFile.WriteLine(" " + entry.Key + " --> " + entry.Value + "\n");
}
logFile.WriteLine("\n");
logFile.WriteLine("File Table\n");
foreach (KeyValuePair <int, MyFile> entry in state.getFileTable())
{
logFile.WriteLine(" " + entry.Key + " --> " + entry.Value + "\n");
}
logFile.WriteLine("\n");
logFile.WriteLine("Output\n");
foreach (int output in state.getStdout())
{
logFile.Write(" %d\n", output);
}
logFile.WriteLine("-------------------\n");
}
catch (Exception) {
Console.WriteLine("error: could not write to the given file");
}
}
}