/// <summary>
/// Attempts to parse a modification.
/// </summary>
static public bool TryParse(StringSlice inData, out VariantModification outModification)
{
inData = inData.Trim();
VariantModifyOperator op = default(VariantModifyOperator);
int operatorIdx = -1;
int operatorLength = 0;
VariantUtils.TryFindOperator(inData, '=', VariantModifyOperator.Set, ref operatorIdx, ref op, ref operatorLength);
VariantUtils.TryFindOperator(inData, '+', VariantModifyOperator.Add, ref operatorIdx, ref op, ref operatorLength);
VariantUtils.TryFindOperator(inData, '-', VariantModifyOperator.Subtract, ref operatorIdx, ref op, ref operatorLength);
VariantUtils.TryFindOperator(inData, '*', VariantModifyOperator.Multiply, ref operatorIdx, ref op, ref operatorLength);
VariantUtils.TryFindOperator(inData, '/', VariantModifyOperator.Divide, ref operatorIdx, ref op, ref operatorLength);
if (operatorIdx < 0)
{
outModification = default(VariantModification);
return(false);
}
outModification.Operator = op;
StringSlice key = inData.Substring(0, operatorIdx);
StringSlice operand = inData.Substring(operatorIdx + 1);
if (!TableKeyPair.TryParse(key, out outModification.VariableKey))
{
outModification = default(VariantModification);
return(false);
}
return(VariantOperand.TryParse(operand, out outModification.Operand));
}
/// <summary>
/// Modify a value on the table.
/// </summary>
public void Modify(StringHash32 inId, VariantModifyOperator inOperator, Variant inOperand)
{
int idx = IndexOf(inId);
switch (inOperator)
{
case VariantModifyOperator.Set:
{
SetAt(idx, inId, inOperand);
break;
}
case VariantModifyOperator.Add:
{
Variant current = GetAt(idx);
SetAt(idx, inId, current + inOperand);
break;
}
case VariantModifyOperator.Subtract:
{
Variant current = GetAt(idx);
SetAt(idx, inId, current - inOperand);
break;
}
case VariantModifyOperator.Multiply:
{
Variant current = GetAt(idx);
SetAt(idx, inId, current * inOperand);
break;
}
case VariantModifyOperator.Divide:
{
Variant current = GetAt(idx);
SetAt(idx, inId, current / inOperand);
break;
}
}
}
/// <summary>
/// Attempts to apply a modification.
/// </summary>
static public bool TryModify(this IVariantResolver inResolver, object inContext, TableKeyPair inKey, VariantModifyOperator inOperator, Variant inVariant)
{
inResolver.RemapKey(ref inKey);
VariantTable table;
bool bRetrieved = inResolver.TryGetTable(inContext, inKey.TableId, out table);
if (!bRetrieved || table == null)
{
UnityEngine.Debug.LogErrorFormat("[IVariantResolver] Unable to retrieve table with id '{0}'", inKey.TableId.ToDebugString());
return(false);
}
table.Modify(inKey.VariableId, inOperator, inVariant);
return(true);
}
