public bool Equals(NumericalValue <T> other)
{
var enumerateThis = ranges.GetEnumerator();
var enumerateOther = other.ranges.GetEnumerator();
while (true)
{
if (enumerateThis.MoveNext())
{
if (enumerateOther.MoveNext())
{
if (!enumerateThis.Current.Equals(enumerateOther.Current))
{
return(false);
}
}
else
{
return(false);
}
}
else
{
if (enumerateOther.MoveNext())
{
return(false);
}
else
{
return(true);
}
}
}
}
/*
* private class Range
* {
* public MinPair min;
* public MaxPair max;
*
* public Range(MinPair min, MaxPair max)
* {
* this.min = min;
* this.max = max;
* }
* }
*
* private class MinPair
* {
* T value;
* Inclusivity inclusivity;
*
* public MinPair(T value, Inclusivity inclusivity)
* {
* this.value = value;
* this.inclusivity = inclusivity;
* }
*
* public static bool operator==(MinPair self, MinPair other)
* {
* return self.value == other.value && self.inclusivity == other.inclusivity;
* }
* public static bool operator!=(MinPair self, MinPair other) { return self != other; }
* }
*
* private class MaxPair
* {
* T value;
* Inclusivity inclusivity;
*
* public MaxPair(T value, Inclusivity inclusivity)
* {
* this.value = value;
* this.inclusivity = inclusivity;
* }
* }
*/
public void UnionWith(NumericalValue <T> other)
{
foreach (Range n in other.ranges)
{
UnionWith(n);
}
}
public void IntersectWith(NumericalValue <T> other)
{
NumericalValue <T> output = new NumericalValue <T>();
foreach (var r in other.ranges)
{
NumericalValue <T> c = this.Clone();
c.IntersectWith(r);
output.UnionWith(c);
}
this.ranges = output.ranges;
}
public void AssignValue(NumericalValue <T> other)
{
this.ranges = new SortedSet <Range>(other.ranges);
}
private void analyze(ControlFlowGraph graph, SyntaxNode node, Dictionary <string, NumericalValue <int> > variables, Dictionary <SyntaxNode, Dictionary <string, NumericalValue <int> > > history)
{
#region Union usagesAfter with reachingDefinitions
if (history.ContainsKey(node))
{
bool anyChanged = false;
foreach (var pair in history[node])
{
if (variables.ContainsKey(pair.Key))
{
var i = variables[pair.Key];
string old = i.ToString();
//Console.WriteLine("{0} vs {1} and {2}", old, i, pair.Value);
i.UnionWith(pair.Value);
if (!old.Equals(i.ToString()))
{
anyChanged = true;
}
}
else
{
variables.Add(pair.Key, pair.Value.Clone());
anyChanged = true;
}
}
if (history[node].Count == 0 && variables.Count != 0)
{
anyChanged = true;
}
if (!anyChanged)
{
return;
}
else
{
var clone = new Dictionary <string, NumericalValue <int> >();
foreach (var v in variables)
{
clone.Add(v.Key, v.Value.Clone());
}
history[node] = clone;
}
}
else
{
var clone = new Dictionary <string, NumericalValue <int> >();
foreach (var v in variables)
{
clone.Add(v.Key, v.Value.Clone());
}
history.Add(node, clone);
}
#endregion
NumericalValue <int> rangeTrue = null;
NumericalValue <int> rangeFalse = null;
string rangeVar = null;
#region Process node
if (node is LocalDeclarationStatementSyntax || node is VariableDeclarationSyntax)
{
VariableDeclarationSyntax s;
if (node is LocalDeclarationStatementSyntax)
{
s = (node as LocalDeclarationStatementSyntax).Declaration;
}
else
{
s = node as VariableDeclarationSyntax;
}
foreach (var v in s.Variables)
{
if (v.Initializer != null)
{
if (v.Initializer.Value is LiteralExpressionSyntax)
{
var valS = (v.Initializer.Value as LiteralExpressionSyntax).Token.ValueText;
int valI;
if (int.TryParse(valS, out valI))
{
var valNV = new NumericalValue <int>(valI);
if (variables.ContainsKey(v.Identifier.ToString()))
{
variables[v.Identifier.ToString()].AssignValue(valNV);
}
else
{
variables.Add(v.Identifier.ToString(), valNV);
}
}
}
else if (v.Initializer.Value is IdentifierNameSyntax)
{
var valNV = variables[v.Initializer.Value.ToString()];
if (variables.ContainsKey(v.Identifier.ToString()))
{
variables[v.Identifier.ToString()].AssignValue(valNV);
}
else
{
variables.Add(v.Identifier.ToString(), valNV);
}
}
else
{
var valNV = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
if (variables.ContainsKey(v.Identifier.ToString()))
{
variables[v.Identifier.ToString()].AssignValue(valNV);
}
else
{
variables.Add(v.Identifier.ToString(), valNV);
}
}
}
}
}
else if (node is ExpressionStatementSyntax && (node as ExpressionStatementSyntax).Expression is AssignmentExpressionSyntax)
{
var s = (node as ExpressionStatementSyntax).Expression as AssignmentExpressionSyntax;
if (s.Right is LiteralExpressionSyntax)
{
var valS = (s.Right as LiteralExpressionSyntax).Token.ValueText;
int valI;
if (int.TryParse(valS, out valI))
{
var valNV = new NumericalValue <int>(valI);
if (variables.ContainsKey(s.Left.ToString()))
{
variables[s.Left.ToString()].AssignValue(valNV);
}
else
{
variables.Add(s.Left.ToString(), valNV);
}
}
}
else if (s.Right is IdentifierNameSyntax)
{
var valNV = variables[s.Right.ToString()];
if (variables.ContainsKey(s.Left.ToString()))
{
variables[s.Left.ToString()].AssignValue(valNV);
}
else
{
variables.Add(s.Left.ToString(), valNV);
}
}
else
{
var valNV = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
if (variables.ContainsKey(s.Left.ToString()))
{
variables[s.Left.ToString()].AssignValue(valNV);
}
else
{
variables.Add(s.Left.ToString(), valNV);
}
}
}
else if (node is BinaryExpressionSyntax)
{
var n = node as BinaryExpressionSyntax;
if (n.Right is LiteralExpressionSyntax)
{
int value;
if (int.TryParse((n.Right as LiteralExpressionSyntax).Token.ValueText, out value))
{
if (n.OperatorToken.ToString().Equals("<"))
{
rangeTrue = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, value, Inclusivity.EXCLUSIVE);
rangeFalse = new NumericalValue <int>(value, Inclusivity.INCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
rangeVar = n.Left.ToString();
}
if (n.OperatorToken.ToString().Equals("<="))
{
rangeTrue = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, value, Inclusivity.INCLUSIVE);
rangeFalse = new NumericalValue <int>(value, Inclusivity.EXCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
rangeVar = n.Left.ToString();
}
if (n.OperatorToken.ToString().Equals(">"))
{
rangeTrue = new NumericalValue <int>(value, Inclusivity.EXCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
rangeFalse = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, value, Inclusivity.INCLUSIVE);
rangeVar = n.Left.ToString();
}
if (n.OperatorToken.ToString().Equals(">="))
{
rangeTrue = new NumericalValue <int>(value, Inclusivity.INCLUSIVE, int.MaxValue, Inclusivity.INCLUSIVE);
rangeFalse = new NumericalValue <int>(int.MinValue, Inclusivity.INCLUSIVE, value, Inclusivity.EXCLUSIVE);
rangeVar = n.Left.ToString();
}
}
}
}
if (debug)
{
Console.WriteLine("({0}): {1} {2}", node.GetLocation().GetLineSpan().StartLinePosition, node, node.GetType());
foreach (var pair in variables)
{
Console.WriteLine(" {0} -> {1}", pair.Key, pair.Value);
}
}
#endregion
#region Recurse
foreach (var succ in graph.GetSuccessorsB(node))
{
var variablesPrime = new Dictionary <string, NumericalValue <int> >();
foreach (var v in variables)
{
variablesPrime.Add(v.Key, v.Value.Clone());
}
if (succ.Value == 0)
{
variablesPrime[rangeVar].IntersectWith(rangeFalse);
}
else if (succ.Value == 1)
{
variablesPrime[rangeVar].IntersectWith(rangeTrue);
}
analyze(graph, succ.Key, variablesPrime, history);
}
#endregion
}