protected override Variable Evaluate(ParsingScript script)
{
if (script.Substr().StartsWith(" .."))
{
script.Forward();
}
string newDir = Utils.GetItem(script).AsString();
try
{
if (newDir == "..")
{
string pwd = Directory.GetCurrentDirectory();
DirectoryInfo parent = Directory.GetParent(pwd);
if (parent == null)
{
throw new ArgumentException("No parent exists.");
}
newDir = parent.FullName;
}
if (newDir.Length == 0)
{
newDir = Environment.GetEnvironmentVariable("HOME");
}
Directory.SetCurrentDirectory(newDir);
newDir = Directory.GetCurrentDirectory();
}
catch (Exception exc)
{
throw new ArgumentException("Couldn't change directory: " + exc.Message);
}
return(new Variable(newDir));
}
async Task <string> ProcessRepl(string repl, string filename = "")
{
ReplMode = true;
Dictionary <int, int> char2Line;
string script = Utils.ConvertToScript(repl, out char2Line);
ParsingScript tempScript = new ParsingScript(script, 0, char2Line);
tempScript.OriginalScript = repl;
tempScript.Debugger = this;
if (!string.IsNullOrWhiteSpace(filename))
{
tempScript.Filename = filename;
}
Variable result = null;
bool excThrown = false;
string stringRes = "";
try
{
while (tempScript.Pointer < script.Length)
{
result = await DebuggerUtils.Execute(tempScript);
tempScript.GoToNextStatement();
while (tempScript.TryCurrent() == Constants.END_STATEMENT)
{
tempScript.Forward();
}
}
if (TrySendFile(result, tempScript, ref excThrown) || excThrown)
{
return("");
}
stringRes = string.IsNullOrEmpty(Output) ? "" : Output + (Output.EndsWith("\n") ? "" : "\n");
stringRes += result == null ? "" : result.AsString();
stringRes += (stringRes.EndsWith("\n") ? "" : "\n");
}
catch (Exception exc)
{
Console.WriteLine("ProcessRepl Exception: " + exc);
return(""); // The exception was already thrown and sent back.
}
finally
{
ReplMode = false;
}
return(stringRes);
}
static Variable ExtractArray(ParsingScript script)
{
Variable newValue = new Variable(Variable.VarType.ARRAY);
while (script.StillValid() && (newValue.Count == 0 || script.Current == ','))
{
script.Forward();
Variable addVariable = ExtractValue(script);
newValue.AddVariable(addVariable);
}
script.MoveForwardIf(']');
return(newValue);
}
static List <Variable> Split(ParsingScript script, char[] to)
{
List <Variable> listToMerge = new List <Variable>(16);
if (!script.StillValid() || to.Contains(script.Current))
{
listToMerge.Add(Variable.EmptyInstance);
script.Forward();
return(listToMerge);
}
int arrayIndexDepth = 0;
bool inQuotes = false;
int negated = 0;
char ch;
string action;
do
{ // Main processing cycle of the first part.
string token = ExtractNextToken(script, to, ref inQuotes, ref arrayIndexDepth, ref negated, out ch, out action);
bool ternary = UpdateIfTernary(script, token, ch, listToMerge, (List <Variable> newList) => { listToMerge = newList; });
if (ternary)
{
return(listToMerge);
}
bool negSign = CheckConsistencyAndSign(script, listToMerge, action, ref token);
// We are done getting the next token. The GetValue() call below may
// recursively call SplitAndMerge(). This will happen if extracted
// item is a function or if the next item is starting with a START_ARG '('.
ParserFunction func = new ParserFunction(script, token, ch, ref action);
Variable current = func.GetValue(script);
if (UpdateResult(script, to, listToMerge, token, negSign, ref current, ref negated, ref action))
{
return(listToMerge);
}
} while (script.StillValid() &&
(inQuotes || arrayIndexDepth > 0 || !to.Contains(script.Current)));
// This happens when called recursively inside of the math expression:
script.MoveForwardIf(Constants.END_ARG);
return(listToMerge);
}
static Variable ExtractObject(ParsingScript script)
{
Variable newValue = new Variable(Variable.VarType.ARRAY);
while (script.StillValid() && (newValue.Count == 0 || script.Current == ','))
{
script.Forward();
string key = Utils.GetToken(script, SEP);
script.MoveForwardIf(':');
Variable valueVar = ExtractValue(script);
newValue.SetHashVariable(key, valueVar);
}
script.MoveForwardIf('}');
return(newValue);
}
static async Task <List <Variable> > SplitAsync(ParsingScript script, char[] to)
{
List <Variable> listToMerge = new List <Variable>(16);
if (!script.StillValid() || to.Contains(script.Current))
{
listToMerge.Add(Variable.EmptyInstance);
script.Forward();
return(listToMerge);
}
int arrayIndexDepth = 0;
bool inQuotes = false;
int negated = 0;
char ch;
string action;
do
{ // Main processing cycle of the first part.
string token = ExtractNextToken(script, to, ref inQuotes, ref arrayIndexDepth, ref negated, out ch, out action);
bool ternary = UpdateIfTernary(script, token, ch, listToMerge, (List <Variable> newList) => { listToMerge = newList; });
if (ternary)
{
return(listToMerge);
}
bool negSign = CheckConsistencyAndSign(script, listToMerge, action, ref token);
ParserFunction func = new ParserFunction(script, token, ch, ref action);
Variable current = await func.GetValueAsync(script);
if (UpdateResult(script, to, listToMerge, token, negSign, ref current, ref negated, ref action))
{
return(listToMerge);
}
} while (script.StillValid() &&
(inQuotes || arrayIndexDepth > 0 || !to.Contains(script.Current)));
// This happens when called recursively inside of the math expression:
script.MoveForwardIf(Constants.END_ARG);
return(listToMerge);
}
private static string UpdateAction(ParsingScript script, char[] to)
{
// We search a valid action till we get to the End of Argument ')'
// or pass the end of string.
if (!script.StillValid() || script.Current == Constants.END_ARG ||
to.Contains(script.Current))
{
return(Constants.NULL_ACTION);
}
string action = Utils.ValidAction(script.Rest);
// We need to advance forward not only the action length but also all
// the characters we skipped before getting the action.
int advance = action == null ? 0 : action.Length;
script.Forward(advance);
return(action == null ? Constants.NULL_ACTION : action);
}
protected override Variable Evaluate(ParsingScript script)
{
script.Forward(); // Skip opening parenthesis.
string line = Console.ReadLine();
if (!m_isNumber)
{
return(new Variable(line));
}
double number = Double.NaN;
if (!Double.TryParse(line, out number))
{
throw new ArgumentException("Couldn't parse number [" + line + "]");
}
return(new Variable(number));
}
static bool CheckConsistencyAndSign(ParsingScript script, List <Variable> listToMerge, string action, ref string token)
{
if (Constants.CONTROL_FLOW.Contains(token) && listToMerge.Count > 0)
{//&&
//item != Constants.RETURN) {
// This can happen when the end of statement ";" is forgotten.
listToMerge.Clear();
//throw new ArgumentException("Token [" +
// item + "] can't be part of an expression. Check \";\". Stopped at [" +
// script.Rest + " ...]");
}
script.MoveForwardIf(Constants.SPACE);
if (action != null && action.Length > 1)
{
script.Forward(action.Length - 1);
}
bool negSign = CheckNegativeSign(ref token);
return(negSign);
}
static bool UpdateResult(ParsingScript script, char[] to, List <Variable> listToMerge, string token, bool negSign,
ref Variable current, ref int negated, ref string action)
{
if (current == null)
{
current = Variable.EmptyInstance;
}
current.ParsingToken = token;
if (negSign)
{
current = new Variable(-1 * current.Value);
}
if (negated > 0 && current.Type == Variable.VarType.NUMBER)
{
// If there has been a NOT sign, this is a boolean.
// Use XOR (true if exactly one of the arguments is true).
bool neg = !((negated % 2 == 0) ^ Convert.ToBoolean(current.Value));
current = new Variable(Convert.ToDouble(neg));
negated = 0;
}
if (script.Current == '.')
{
bool inQuotes = false;
int arrayIndexDepth = 0;
script.Forward();
string property = ExtractNextToken(script, to, ref inQuotes, ref arrayIndexDepth, ref negated, out _, out action);
Variable propValue = current.Type == Variable.VarType.ENUM ?
current.GetEnumProperty(property, script) :
current.GetProperty(property, script);
current = propValue;
}
if (action == null)
{
action = UpdateAction(script, to);
}
else
{
script.MoveForwardIf(action[0]);
}
char next = script.TryCurrent(); // we've already moved forward
bool done = listToMerge.Count == 0 &&
(next == Constants.END_STATEMENT ||
(action == Constants.NULL_ACTION && current.Type != Variable.VarType.NUMBER) ||
current.IsReturn);
if (done)
{
if (action != null && action != Constants.END_ARG_STR && token != Constants.DEFAULT)
{
throw new ArgumentException("Action [" +
action + "] without an argument.");
}
// If there is no numerical result, we are not in a math expression.
listToMerge.Add(current);
return(true);
}
Variable cell = current.Clone();
cell.Action = action;
bool addIt = UpdateIfBool(script, cell, (Variable newCell) => { cell = newCell; }, listToMerge, (List <Variable> var) => { listToMerge = var; });
if (addIt)
{
listToMerge.Add(cell);
}
return(false);
}
public static string ExtractNextToken(ParsingScript script, char[] to, ref bool inQuotes,
ref int arrayIndexDepth, ref int negated, out char ch, out string action, bool throwExc = true)
{
StringBuilder item = new StringBuilder();
ch = Constants.EMPTY;
action = null;
do
{
string negateSymbol = Utils.IsNotSign(script.Rest);
if (negateSymbol != null && !inQuotes)
{
negated++;
script.Forward(negateSymbol.Length);
continue;
}
ch = script.CurrentAndForward();
CheckQuotesIndices(script, ch, ref inQuotes, ref arrayIndexDepth);
bool keepCollecting = inQuotes || arrayIndexDepth > 0 ||
StillCollecting(item.ToString(), to, script, ref action);
if (keepCollecting)
{
// The char still belongs to the previous operand.
item.Append(ch);
bool goForMore = script.StillValid() &&
(inQuotes || arrayIndexDepth > 0 || !to.Contains(script.Current));
if (goForMore)
{
continue;
}
}
if (SkipOrAppendIfNecessary(item, ch, to))
{
continue;
}
break;
}while (true);
if (to.Contains(Constants.END_ARRAY) && ch == Constants.END_ARRAY &&
item[item.Length - 1] != Constants.END_ARRAY &&
item.ToString().Contains(Constants.START_ARRAY))
{
item.Append(ch);
}
string result = item.ToString();
result = result.Replace("\\\\", "\\");
result = result.Replace("\\\"", "\"");
result = result.Replace("\\'", "'");
if (throwExc && string.IsNullOrWhiteSpace(result) && action != "++" && action != "--" &&
Utils.IsAction(script.Prev) && Utils.IsAction(script.PrevPrev))
{
Utils.ThrowErrorMsg("Can't process token [" + script.PrevPrev + script.Prev + script.Current +
"].", script, script.Current.ToString());
}
return(result);
}
