/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
// When comparing, both operands are converted to boolean
switch (operation)
{
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
IntervalValue <int> convertedValue;
if (TypeConversion.TryConvertToIntegerInterval(OutSet, leftOperand, out convertedValue))
{
result = convertedValue;
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.Mul:
result = OutSet.CreateDouble(0.0);
break;
default:
base.VisitUndefinedValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitLongintValue(LongintValue value)
{
if (isIncrement)
{
if (value.Value < long.MaxValue)
{
result = OutSet.CreateLong(value.Value + 1);
}
else
{
result = OutSet.CreateDouble(TypeConversion.ToFloat(value.Value) + 1.0);
}
}
else
{
if (value.Value > long.MinValue)
{
result = OutSet.CreateLong(value.Value - 1);
}
else
{
result = OutSet.CreateDouble(TypeConversion.ToFloat(value.Value) - 1.0);
}
}
}
/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
switch (operation)
{
case Operations.Add:
case Operations.Sub:
result = OutSet.AnyFloatValue;
break;
case Operations.Mul:
result = OutSet.CreateDouble(0.0);
break;
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
result = OutSet.AnyIntegerValue;
break;
default:
base.VisitUndefinedValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitIntegerValue(IntegerValue value)
{
if (isIncrement)
{
if (value.Value < int.MaxValue)
{
result = OutSet.CreateInt(value.Value + 1);
}
else
{
result = OutSet.CreateDouble(TypeConversion.ToFloat(value.Value) + 1.0);
}
}
else
{
if (value.Value > int.MinValue)
{
result = OutSet.CreateInt(value.Value - 1);
}
else
{
result = OutSet.CreateDouble(TypeConversion.ToFloat(value.Value) - 1.0);
}
}
}
/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
int integerValue;
double floatValue;
bool isInteger;
switch (operation)
{
case Operations.Or:
case Operations.Xor:
result = TypeConversion.ToBoolean(OutSet, leftOperand);
break;
case Operations.Add:
case Operations.Sub:
TypeConversion.TryConvertToNumber(leftOperand.Value, true, out integerValue,
out floatValue, out isInteger);
if (isInteger)
{
result = OutSet.CreateInt(integerValue);
}
else
{
result = OutSet.CreateDouble(floatValue);
}
break;
case Operations.Mul:
TypeConversion.TryConvertToNumber(leftOperand.Value, true, out integerValue,
out floatValue, out isInteger);
if (isInteger)
{
result = OutSet.CreateInt(0);
}
else
{
result = OutSet.CreateDouble(0.0);
}
break;
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
result = TypeConversion.ToInteger(OutSet, leftOperand);
break;
default:
result = Comparison.Compare(OutSet, operation, leftOperand.Value, string.Empty);
if (result != null)
{
break;
}
base.VisitUndefinedValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitFloatValue(FloatValue value)
{
if (isIncrement)
{
result = OutSet.CreateDouble(value.Value + 1.0);
}
else
{
result = OutSet.CreateDouble(value.Value - 1.0);
}
}
/// <inheritdoc />
public override void VisitIntervalFloatValue(FloatIntervalValue value)
{
if (value.Start == value.End)
{
VisitFloatValue(OutSet.CreateDouble(value.Start));
return;
}
IntervalValue <int> integerInterval;
switch (operation)
{
case Operations.Minus:
result = OutSet.CreateFloatInterval(-value.End, -value.Start);
break;
case Operations.BitNegation:
if (TypeConversion.TryConvertToIntegerInterval(OutSet, value, out integerInterval))
{
result = OutSet.CreateIntegerInterval(~integerInterval.End, ~integerInterval.Start);
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.Int32Cast:
if (TypeConversion.TryConvertToIntegerInterval(OutSet, value, out integerInterval))
{
result = integerInterval;
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.FloatCast:
case Operations.DoubleCast:
result = value;
break;
default:
base.VisitIntervalFloatValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitLongintValue(LongintValue value)
{
switch (operation)
{
case Operations.Plus:
result = value;
break;
case Operations.Minus:
// Result of arithmetic negation can overflow
if ((value.Value == 0) || ((-value.Value) != 0))
{
result = OutSet.CreateLong(-value.Value);
}
else
{
// <seealso cref="UnaryOperationEvaluator.VisitIntegerValue" />
result = OutSet.CreateDouble(-(TypeConversion.ToFloat(value.Value)));
}
break;
case Operations.BitNegation:
result = OutSet.CreateLong(~value.Value);
break;
case Operations.Int32Cast:
IntegerValue convertedValue;
if (TypeConversion.TryConvertToInteger(OutSet, value, out convertedValue))
{
result = convertedValue;
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.FloatCast:
case Operations.DoubleCast:
result = TypeConversion.ToFloat(Snapshot, value);
break;
default:
base.VisitLongintValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitFloatValue(FloatValue value)
{
switch (operation)
{
case Operations.Plus:
result = value;
break;
case Operations.Minus:
result = OutSet.CreateDouble(-value.Value);
break;
case Operations.BitNegation:
int nativeIntegerValue;
if (TypeConversion.TryConvertToInteger(value.Value, out nativeIntegerValue))
{
result = OutSet.CreateInt(~nativeIntegerValue);
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.Int32Cast:
IntegerValue integerValue;
if (TypeConversion.TryConvertToInteger(OutSet, value, out integerValue))
{
result = integerValue;
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.FloatCast:
case Operations.DoubleCast:
result = value;
break;
default:
base.VisitFloatValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitIntegerValue(IntegerValue value)
{
switch (operation)
{
case Operations.Plus:
result = value;
break;
case Operations.Minus:
// Result of arithmetic negation can overflow
if ((value.Value == 0) || ((-value.Value) != 0))
{
result = OutSet.CreateInt(-value.Value);
}
else
{
// If the number has the lowest value (the most important bit is 1, others are 0
// in binary), arithmetic negation of it is zero. PHP behaves differently.
// It converts the number to the same positive value, but that cause overflow.
// Then integer value is converted to appropriate float value
result = OutSet.CreateDouble(-TypeConversion.ToFloat(value.Value));
}
break;
case Operations.BitNegation:
result = OutSet.CreateInt(~value.Value);
break;
case Operations.Int32Cast:
result = value;
break;
case Operations.FloatCast:
case Operations.DoubleCast:
result = OutSet.CreateDouble(value.Value);
break;
default:
base.VisitIntegerValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
// When comparing, both operands are converted to boolean
switch (operation)
{
case Operations.Equal:
case Operations.LessThanOrEqual:
result = OutSet.CreateBool(!TypeConversion.ToBoolean(leftOperand.Value));
break;
case Operations.NotEqual:
case Operations.GreaterThan:
case Operations.Or:
case Operations.Xor:
result = TypeConversion.ToBoolean(OutSet, leftOperand);
break;
case Operations.Mul:
result = OutSet.CreateDouble(0.0);
break;
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
int leftInteger;
if (TypeConversion.TryConvertToInteger(leftOperand.Value, out leftInteger))
{
result = OutSet.CreateInt(leftInteger);
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
default:
base.VisitUndefinedValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
// When comparing, both operands are converted to boolean
switch (operation)
{
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
result = OutSet.AnyIntegerValue;
break;
case Operations.Mul:
result = OutSet.CreateDouble(0.0);
break;
default:
base.VisitUndefinedValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitFloatValue(FloatValue value)
{
// When comparing, both operands are converted to boolean
switch (operation)
{
case Operations.Equal:
case Operations.GreaterThanOrEqual:
result = OutSet.CreateBool(!TypeConversion.ToBoolean(value.Value));
break;
case Operations.NotEqual:
case Operations.LessThan:
case Operations.Or:
case Operations.Xor:
result = TypeConversion.ToBoolean(OutSet, value);
break;
case Operations.Add:
result = OutSet.CreateDouble(value.Value);
break;
case Operations.Sub:
result = OutSet.CreateDouble(-value.Value);
break;
case Operations.Mul:
result = OutSet.CreateDouble(0.0);
break;
case Operations.BitOr:
case Operations.BitXor:
int rightInteger;
if (TypeConversion.TryConvertToInteger(value.Value, out rightInteger))
{
result = OutSet.CreateInt(rightInteger);
}
else
{
result = OutSet.AnyIntegerValue;
}
break;
case Operations.Div:
if (value.Value != 0.0)
{
// 0 (null) divided or modulo by anything is always 0
result = OutSet.CreateDouble(0.0);
}
else
{
SetWarning("Division by floating-point zero",
AnalysisWarningCause.DIVISION_BY_ZERO);
// Division by floating-point zero does not return NaN
// or infinite, but false boolean value
result = OutSet.CreateBool(false);
}
break;
case Operations.Mod:
result = ModuloOperation.Modulo(flow,
TypeConversion.ToInteger(leftOperand), value.Value);
break;
default:
base.VisitFloatValue(value);
break;
}
}
/// <summary>
/// Create double representation of given literal
/// </summary>
/// <param name="x">Literal value</param>
/// <returns>Created literal value representation</returns>
public virtual MemoryEntry DoubleLiteral(DoubleLiteral x)
{
return(new MemoryEntry(OutSet.CreateDouble((double)x.Value)));
}
/// <inheritdoc />
public override void VisitStringValue(StringValue value)
{
int integerValue;
double floatValue;
bool isInteger;
switch (operation)
{
case Operations.Plus:
TypeConversion.TryConvertToNumber(value.Value, true, out integerValue,
out floatValue, out isInteger);
if (isInteger)
{
result = OutSet.CreateInt(integerValue);
}
else
{
result = OutSet.CreateDouble(floatValue);
}
break;
case Operations.Minus:
TypeConversion.TryConvertToNumber(value.Value, true, out integerValue,
out floatValue, out isInteger);
if (isInteger)
{
if ((integerValue == 0) || ((-integerValue) != 0))
{
result = OutSet.CreateInt(-integerValue);
}
else
{
// <seealso cref="UnaryOperationEvaluator.VisitIntegerValue" />
result = OutSet.CreateDouble(-TypeConversion.ToFloat(integerValue));
}
}
else
{
result = OutSet.CreateDouble(floatValue);
}
break;
case Operations.LogicNegation:
result = OutSet.CreateBool(!TypeConversion.ToBoolean(value.Value));
break;
case Operations.BitNegation:
// Bit negation is defined for every character, not for the entire string
// TODO: Implement. PHP string is stored as array of bytes, but printed in UTF8 encoding
result = OutSet.AnyStringValue;
break;
case Operations.Int32Cast:
result = TypeConversion.ToInteger(OutSet, value);
break;
case Operations.FloatCast:
case Operations.DoubleCast:
result = TypeConversion.ToFloat(Snapshot, value);
break;
default:
base.VisitStringValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitIntegerValue(IntegerValue value)
{
// When comparing, both operands are converted to boolean
switch (operation)
{
case Operations.Equal:
case Operations.GreaterThanOrEqual:
result = OutSet.CreateBool(!TypeConversion.ToBoolean(value.Value));
break;
case Operations.NotEqual:
case Operations.LessThan:
case Operations.Or:
case Operations.Xor:
result = TypeConversion.ToBoolean(OutSet, value);
break;
case Operations.Add:
case Operations.BitOr:
case Operations.BitXor:
result = value;
break;
case Operations.Sub:
// Result of subtraction can overflow
if ((value.Value == 0) || ((-value.Value) != 0))
{
result = OutSet.CreateInt(-value.Value);
}
else
{
// <seealso cref="UnaryOperationEvaluator.VisitIntegerValue" />
result = OutSet.CreateDouble(-(TypeConversion.ToFloat(value.Value)));
}
break;
case Operations.Mul:
result = OutSet.CreateInt(0);
break;
case Operations.Div:
case Operations.Mod:
if (value.Value != 0)
{
// 0 (null) divided or modulo by anything is always 0
result = OutSet.CreateInt(0);
}
else
{
SetWarning("Division by zero", AnalysisWarningCause.DIVISION_BY_ZERO);
// Division or modulo by zero returns false boolean value
result = OutSet.CreateBool(false);
}
break;
default:
base.VisitIntegerValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitAnyValue(AnyValue value)
{
switch (operation)
{
case Operations.Equal:
case Operations.NotEqual:
case Operations.GreaterThanOrEqual:
case Operations.LessThan:
case Operations.Or:
case Operations.Xor:
result = OutSet.AnyBooleanValue;
break;
case Operations.Add:
case Operations.Sub:
// Ommitted warning message that object cannot be converted to integer
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.AnyFloatValue;
break;
case Operations.Mul:
// Ommitted warning message that object cannot be converted to integer
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.CreateDouble(0.0);
break;
case Operations.Div:
// Ommitted warning message that object cannot be converted to integer
// Ommitted warning message of division by zero
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.AnyValue;
break;
case Operations.BitAnd:
case Operations.ShiftLeft:
case Operations.ShiftRight:
// Ommitted warning message that object cannot be converted to integer
result = OutSet.CreateInt(0);
break;
case Operations.BitOr:
case Operations.BitXor:
// Ommitted warning message that object cannot be converted to integer
result = OutSet.AnyIntegerValue;
break;
case Operations.Mod:
// Ommitted warning message that object cannot be converted to integer
result = ModuloOperation.AbstractModulo(flow);
break;
default:
if (PerformCommonAnyOperandOperations())
{
break;
}
base.VisitAnyValue(value);
break;
}
}
/// <inheritdoc />
public override void VisitUndefinedValue(UndefinedValue value)
{
switch (operation)
{
case Operations.Equal:
case Operations.NotEqual:
case Operations.GreaterThan:
case Operations.LessThanOrEqual:
result = OutSet.AnyBooleanValue;
break;
case Operations.GreaterThanOrEqual:
result = OutSet.CreateBool(true);
break;
case Operations.LessThan:
result = OutSet.CreateBool(false);
break;
case Operations.Add:
case Operations.Sub:
// Ommitted warning message that object cannot be converted to integer
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.AnyFloatValue;
break;
case Operations.Mul:
// Ommitted warning message that object cannot be converted to integer
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.CreateDouble(0.0);
break;
case Operations.Div:
// Ommitted warning message that object cannot be converted to integer
// Ommitted warning message of division by zero
// Ommitted error report that array is unsupported operand in arithmetic operation
result = OutSet.AnyValue;
break;
case Operations.Mod:
// Ommitted warning message that object cannot be converted to integer
result = ModuloOperation.ModuloByNull(flow);
break;
case Operations.BitAnd:
// Ommitted warning message that object cannot be converted to integer
result = OutSet.CreateInt(0);
break;
case Operations.BitOr:
case Operations.BitXor:
case Operations.ShiftLeft:
case Operations.ShiftRight:
// Ommitted warning message that object cannot be converted to integer
result = OutSet.AnyIntegerValue;
break;
default:
result = LogicalOperation.AbstractLogical(OutSet, operation,
TypeConversion.ToBoolean(value));
if (result != null)
{
break;
}
base.VisitUndefinedValue(value);
break;
}
}
