private async Task <Variable> ProcessBlockAsync(ParsingScript script)
{
int blockStart = script.Pointer;
Variable result = null;
if (script.Debugger != null)
{
bool done = false;
result = await script.Debugger.DebugBlockIfNeeded(script, done, (newDone) => { done = newDone; });
if (done)
{
return(result);
}
}
while (script.StillValid())
{
int endGroupRead = script.GoToNextStatement();
if (endGroupRead > 0 || !script.StillValid())
{
return(result != null ? result : new Variable());
}
result = await script.ExecuteToAsync();
if (result.IsReturn ||
result.Type == Variable.VarType.BREAK ||
result.Type == Variable.VarType.CONTINUE)
{
return(result);
}
}
return(result);
}
public async Task <Variable> ProcessAsync(string script, string filename = "", bool mainFile = false)
{
Dictionary <int, int> char2Line;
string data = Utils.ConvertToScript(script, out char2Line, filename);
if (string.IsNullOrWhiteSpace(data))
{
return(null);
}
ParsingScript toParse = new ParsingScript(data, 0, char2Line);
toParse.OriginalScript = script;
toParse.Filename = filename;
if (mainFile)
{
toParse.MainFilename = toParse.Filename;
}
Variable result = null;
while (toParse.Pointer < data.Length)
{
result = await toParse.ExecuteToAsync();
toParse.GoToNextStatement();
}
return(result);
}
internal async Task <Variable> ProcessIfAsync(ParsingScript script)
{
int startIfCondition = script.Pointer;
Variable result = await script.ExecuteToAsync(Constants.END_ARG);
bool isTrue = Convert.ToBoolean(result.Value);
if (isTrue)
{
result = await ProcessBlockAsync(script);
if (result.IsReturn ||
result.Type == Variable.VarType.BREAK ||
result.Type == Variable.VarType.CONTINUE)
{
// We are here from the middle of the if-block. Skip it.
script.Pointer = startIfCondition;
SkipBlock(script);
}
SkipRestBlocks(script);
return(result);
//return Variable.EmptyInstance;
}
// We are in Else. Skip everything in the If statement.
SkipBlock(script);
ParsingScript nextData = new ParsingScript(script);
nextData.ParentScript = script;
string nextToken = Utils.GetNextToken(nextData);
if (Constants.ELSE_IF_LIST.Contains(nextToken))
{
script.Pointer = nextData.Pointer + 1;
result = await ProcessIfAsync(script);
}
else if (Constants.ELSE_LIST.Contains(nextToken))
{
script.Pointer = nextData.Pointer + 1;
result = await ProcessBlockAsync(script);
}
if (result.IsReturn)
{
return(result);
}
return(Variable.EmptyInstance);
}
public static async Task <List <Variable> > GetArrayIndicesAsync(ParsingScript script, string varName, int end, Action <string, int> updateVals)
{
List <Variable> indices = new List <Variable>();
int argStart = varName.IndexOf(Constants.START_ARRAY);
if (argStart < 0)
{
return(indices);
}
int firstIndexStart = argStart;
while (argStart < varName.Length &&
varName[argStart] == Constants.START_ARRAY)
{
int argEnd = varName.IndexOf(Constants.END_ARRAY, argStart + 1);
if (argEnd == -1 || argEnd <= argStart + 1)
{
break;
}
ParsingScript tempScript = script.GetTempScript(varName, argStart);
/*ParsingScript tempScript = new ParsingScript(varName, argStart);
* tempScript.ParentScript = script;
* tempScript.Char2Line = script.Char2Line;
* tempScript.Filename = script.Filename;
* tempScript.OriginalScript = script.OriginalScript;
* tempScript.InTryBlock = script.InTryBlock;*/
tempScript.MoveForwardIf(Constants.START_ARG, Constants.START_ARRAY);
Variable index = await tempScript.ExecuteToAsync(Constants.END_ARRAY);
indices.Add(index);
argStart = argEnd + 1;
}
if (indices.Count > 0)
{
varName = varName.Substring(0, firstIndexStart);
end = argStart - 1;
}
updateVals(varName, end);
return(indices);
}
internal async Task <Variable> ProcessWhileAsync(ParsingScript script)
{
int startWhileCondition = script.Pointer;
// A check against an infinite loop.
int cycles = 0;
bool stillValid = true;
while (stillValid)
{
script.Pointer = startWhileCondition;
//int startSkipOnBreakChar = from;
Variable condResult = await script.ExecuteToAsync(Constants.END_ARG);
stillValid = Convert.ToBoolean(condResult.Value);
if (!stillValid)
{
break;
}
// Check for an infinite loop if we are comparing same values:
if (MAX_LOOPS > 0 && ++cycles >= MAX_LOOPS)
{
throw new ArgumentException("Looks like an infinite loop after " +
cycles + " cycles.");
}
Variable result = await ProcessBlockAsync(script);
if (result.IsReturn || result.Type == Variable.VarType.BREAK)
{
script.Pointer = startWhileCondition;
break;
}
}
// The while condition is not true anymore: must skip the whole while
// block before continuing with next statements.
SkipBlock(script);
return(Variable.EmptyInstance);
}
