private UInt32 ComputeTupleSize(IRRule rule, IRFuncCondition condition, UInt32 lastTupleSize)
{
UInt32 tupleSize = lastTupleSize;
foreach (var param in condition.Params)
{
if (param is IRVariable)
{
var variable = param as IRVariable;
if (variable.Index >= tupleSize)
{
tupleSize = (UInt32)variable.Index + 1;
}
}
}
return tupleSize;
}
private IRCondition ASTConditionToIR(IRRule rule, ASTCondition astCondition)
{
if (astCondition is ASTFuncCondition)
{
var astFunc = astCondition as ASTFuncCondition;
var func = new IRFuncCondition
{
Func = new IRSymbolRef(new FunctionNameAndArity(astFunc.Name, astFunc.Params.Count)),
Not = astFunc.Not,
Params = new List <IRValue>(astFunc.Params.Count),
TupleSize = -1,
Location = astCondition.Location
};
foreach (var param in astFunc.Params)
{
func.Params.Add(ASTValueToIR(rule, param));
}
return(func);
}
else if (astCondition is ASTBinaryCondition)
{
var astBin = astCondition as ASTBinaryCondition;
return(new IRBinaryCondition
{
LValue = ASTValueToIR(rule, astBin.LValue),
Op = astBin.Op,
RValue = ASTValueToIR(rule, astBin.RValue),
TupleSize = -1,
Location = astCondition.Location
});
}
else
{
throw new InvalidOperationException("Cannot convert unknown AST condition type to IR");
}
}
private void VerifyIRFuncCondition(IRRule rule, IRFuncCondition condition, int conditionIndex)
{
// TODO - Merge FuncCondition and IRStatement base?
// Base --> IRParameterizedCall --> FuncCond: has (NOT) field
var func = Context.LookupSignature(condition.Func.Name);
if (func == null)
{
Context.Log.Error(condition.Location,
DiagnosticCode.UnresolvedSymbol,
"Symbol \"{0}\" could not be resolved",
condition.Func.Name);
return;
}
if (!func.FullyTyped)
{
Context.Log.Error(condition.Location,
DiagnosticCode.UnresolvedSignature,
"Signature of \"{0}\" could not be determined",
condition.Func.Name);
return;
}
func.Read = true;
if (conditionIndex == 0)
{
switch (rule.Type)
{
case RuleType.Proc:
if (func.Type != FunctionType.Proc)
{
Context.Log.Error(condition.Location,
DiagnosticCode.InvalidSymbolInInitialCondition,
"Initial proc condition can only be a PROC name; \"{0}\" is a {1}",
condition.Func.Name, func.Type);
return;
}
break;
case RuleType.Query:
if (func.Type != FunctionType.UserQuery)
{
Context.Log.Error(condition.Location,
DiagnosticCode.InvalidSymbolInInitialCondition,
"Initial query condition can only be a user-defined QRY name; \"{0}\" is a {1}",
condition.Func.Name, func.Type);
return;
}
break;
case RuleType.Rule:
if (func.Type != FunctionType.Event
&& func.Type != FunctionType.Database)
{
Context.Log.Error(condition.Location,
DiagnosticCode.InvalidSymbolInInitialCondition,
"Initial rule condition can only be an event or a DB; \"{0}\" is a {1}",
condition.Func.Name, func.Type);
return;
}
break;
default:
throw new Exception("Unknown rule type");
}
}
else
{
if (func.Type != FunctionType.SysQuery
&& func.Type != FunctionType.Query
&& func.Type != FunctionType.Database
&& func.Type != FunctionType.UserQuery)
{
Context.Log.Error(condition.Location,
DiagnosticCode.InvalidFunctionTypeInCondition,
"Subsequent rule conditions can only be queries or DBs; \"{0}\" is a {1}",
condition.Func.Name, func.Type);
return;
}
}
int index = 0;
foreach (var param in func.Params)
{
var condParam = condition.Params[index];
ValueType type = condParam.Type;
if (type == null)
{
Context.Log.Error(condParam.Location,
DiagnosticCode.InternalError,
"No type information available for func condition arg");
continue;
}
VerifyIRValue(rule, condParam);
VerifyIRValueCall(rule, condParam, func, index, conditionIndex, condition.Not);
VerifyParamCompatibility(func, index, param, condParam);
index++;
}
}