// Call this after creating the class and adding members to it.
public bool FinalizeClass(ExecContext context)
{
Pb.Assert(0 == context.control.flags);
// Only initializing the members that this class has added is a cool idea, but
// leaves us f****d when it comes to overrridden functions.
// So, I'm being lazy here and initializing them all.
for (int ii = 0; ii < _memberFuncs.Count; ++ii)
{
ClassMember member = _memberFuncs.Get(ii);
if (null != member.initializer && (member.initializer is Expr_Literal || member.initializer is Expr_Value))
{
// Make sure vftableVars has a slot for this function.
while (vftableVars.Count < ii + 1)
{
vftableVars.Add(null);
}
object initValue = member.initializer.Evaluate(context);
if (context.IsRuntimeErrorSet())
{
return(false);
}
// Create the variable for the function.
vftableVars[ii] = new Variable(member.name, member.typeDef, initValue);
}
}
// Initialize the static members. Populates the staticVars list.
for (int ii = 0; ii < _statics.Count; ++ii)
{
ClassMember member = _statics.Get(ii);
object initValue = null;
if (null != member.initializer)
{
initValue = member.initializer.Evaluate(context);
if (context.IsRuntimeErrorSet())
{
context.engine.LogCompileError(ParseErrorType.StaticMemberEvaluationError, name + "::" + member.name + " - " + context.GetRuntimeErrorString());
return(false);
}
}
staticVars[ii] = new Variable(member.name, member.typeDef, initValue);
}
return(true);
}
public object EvaluateValues(ExecContext context)
{
bool isNum = valueType.CanStoreValue(context, IntrinsicTypeDefs.NUMBER);
double nextInteger = 0;
bool isString = valueType.CanStoreValue(context, IntrinsicTypeDefs.STRING);
for (int ii = 0; ii < _values.Count; ++ii)
{
ClassValue_Enum val = (ClassValue_Enum)_classDef.Allocate(context);
val.Get(mrName).value = _values[ii].name;
_classDef.staticVars[ii].value = val;
if (null == _values[ii].initializer)
{
if (isNum)
{
// If number, use next consecutive integer.
val.Get(mrValue).value = nextInteger;
nextInteger = Math.Floor(nextInteger + 1);
}
else if (isString)
{
// If string, just use name.
val.Get(mrValue).value = _values[ii].name;
}
else
{
// Use the default value.
val.Get(mrValue).value = valueType.GetDefaultValue(context);
}
}
else
{
object init = _values[ii].initializer.Evaluate(context);
if (context.IsRuntimeErrorSet())
{
return(null);
}
val.Get(mrValue).value = init;
if (isNum)
{
nextInteger = Math.Floor((double)init + 1);
}
}
}
return(false);
}
private ScriptResult _EvaluateExpression(IExpr expr, bool createTempScope, bool hardTerminal = false)
{
if (null == expr)
{
LogError("Cannot evaluate null expression.");
return(null);
}
StackState stackState = defaultContext.stack.GetState();
if (createTempScope)
{
if (!defaultContext.stack.PushTerminalScope("<Evaluate>", defaultContext, hardTerminal))
{
LogError("_EvaluateExpression: stack overflow");
return(null);
}
}
ScriptResult result = new ScriptResult();
result.value = expr.Evaluate(defaultContext);
if (defaultContext.IsRuntimeErrorSet())
{
defaultContext.stack.RestoreState(stackState);
if (logCompileErrors)
{
LogError(defaultContext.GetRuntimeErrorString());
}
result.runtimeError = defaultContext.control.runtimeError;
result.success = false;
defaultContext.control.Clear();
}
else
{
result.success = true;
if (createTempScope)
{
defaultContext.stack.RestoreState(stackState);
defaultContext.control.Clear();
}
}
return(result);
}
// Create a new instance of the class.
public ClassValue Allocate(ExecContext context)
{
ClassValue result = childAllocator();
result.classDef = this;
result.debugName = name + " Inst";
bool scopePushed = false;
for (int ii = 0; ii < _fields.Count; ++ii)
{
ClassMember member = _fields.Get(ii);
object value = null;
if (null != member.initializer)
{
if (!scopePushed)
{
scopePushed = true;
if (!context.stack.PushClassScope(result, context))
{
context.SetRuntimeError(RuntimeErrorType.StackOverflow, "ClassValue.Allocate - stack overflow.");
return(null);
}
}
value = member.initializer.Evaluate(context);
}
else if (!member.typeDef.IsReference()) // don't instantiate class refs automatically
{
value = member.typeDef.GetDefaultValue(context);
}
Variable newVar = new Variable(member.name, member.typeDef, value);
result.fieldVars.Add(newVar);
}
if (null != constructor)
{
if (context.IsRuntimeErrorSet())
{
return(null);
}
if (!scopePushed)
{
scopePushed = true;
if (!context.stack.PushClassScope(result, context))
{
context.SetRuntimeError(RuntimeErrorType.StackOverflow, "ClassValue.Allocate - stack overflow.");
return(null);
}
}
constructor.Evaluate(context);
if (context.IsRuntimeErrorSet())
{
return(null);
}
}
if (scopePushed)
{
context.stack.PopScope();
}
return(result);
}
public bool Write(ExecContext context, PebbleStreamHelper stream, object value)
{
Pb.Assert(!(value is Variable));
if (null != textWriter)
{
string s = CoreLib.ValueToString(context, value, false);
textWriter.Write(s);
return(true);
}
if (null == value)
{
writer.Write("null");
}
else if (value is FunctionValue)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot serialize functions.");
return(false);
}
else if (value is bool)
{
writer.Write((bool)value);
}
else if (value is double)
{
writer.Write((double)value);
}
else if (value is string)
{
writer.Write((string)value);
}
else if (value is PebbleList)
{
PebbleList plist = value as PebbleList;
// - Serialize full type, ie "List<string>".
writer.Write(plist.classDef.name);
// - Serialize count.
writer.Write(plist.list.Count);
// - Finally, serialize each object.
foreach (Variable listvar in plist.list)
{
if (!Write(context, stream, listvar.value))
{
return(false);
}
}
}
else if (value is PebbleDictionary)
{
PebbleDictionary dic = value as PebbleDictionary;
// - class name
writer.Write(dic.classDef.name);
// - count
writer.Write((Int32)dic.dictionary.Count);
// - each key, value
foreach (var kvp in dic.dictionary)
{
if (!Write(context, stream, kvp.Key))
{
return(false);
}
if (!Write(context, stream, kvp.Value.value))
{
return(false);
}
}
}
else if (value is ClassValue_Enum)
{
ClassValue_Enum enumVal = value as ClassValue_Enum;
writer.Write(enumVal.classDef.name);
writer.Write(enumVal.GetName());
}
else if (value is ClassValue)
{
ClassValue classVal = value as ClassValue;
MemberRef serMemRef = classVal.classDef.GetMemberRef(null, "Serialize", ClassDef.SEARCH.NORMAL);
if (serMemRef.isInvalid)
{
context.SetRuntimeError(RuntimeErrorType.SerializeInvalidClass, "Class '" + classVal.classDef.name + "' cannot be serialized because it doesn't implement a serialization function.");
return(false);
}
writer.Write(classVal.classDef.name);
Variable serVar = classVal.Get(serMemRef);
FunctionValue serFunc = serVar.value as FunctionValue;
object result = serFunc.Evaluate(context, new List <object> {
stream
}, classVal);
if (context.IsRuntimeErrorSet())
{
return(false);
}
if (result is bool && false == (bool)result)
{
context.SetRuntimeError(RuntimeErrorType.SerializeFailed, "Serialize function of class '" + classVal.classDef.name + "' returned false.");
return(false);
}
}
else
{
throw new Exception("Internal error: Unexpected type of value in stream Write.");
}
return(true);
}
public bool Read(ExecContext context, PebbleStreamHelper stream, Variable variable)
{
if (variable.type.IsConst())
{
context.SetRuntimeError(RuntimeErrorType.SerializeIntoConst, "Cannot serialize into const variables.");
return(false);
}
if (variable.type.CanStoreValue(context, IntrinsicTypeDefs.BOOL))
{
variable.value = reader.ReadBoolean();
}
else if (variable.type == IntrinsicTypeDefs.NUMBER)
{
variable.value = reader.ReadDouble();
}
else if (variable.type == IntrinsicTypeDefs.STRING)
{
variable.value = reader.ReadString();
}
else if (variable.type.GetName().StartsWith("List<"))
{
string listTypeName = reader.ReadString();
if ("null" == listTypeName)
{
variable.value = null;
return(true);
}
// Is it possible that the specific generic class isn't registered yet.
if (!EnsureGenericIsRegistered(context, listTypeName))
{
return(false);
}
ClassDef listDef = context.GetClass(listTypeName);
if (null == listDef)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot deserialize list type '" + listTypeName + "' because it is unknown.");
return(false);
}
ClassValue listValue = listDef.Allocate(context);
PebbleList newlist = listValue as PebbleList;
variable.value = listValue;
ITypeDef elementType = listDef.typeDef.genericTypes[0];
int count = reader.ReadInt32();
for (int ii = 0; ii < count; ++ii)
{
Variable newelem = new Variable(null, elementType);
if (!Read(context, stream, newelem))
{
return(false);
}
newlist.list.Add(newelem);
}
}
else if (variable.type.GetName().StartsWith("Dictionary<"))
{
string listTypeName = reader.ReadString();
if ("null" == listTypeName)
{
variable.value = null;
return(true);
}
// Is it possible that the specific generic class isn't registered yet.
if (!EnsureGenericIsRegistered(context, listTypeName))
{
return(false);
}
ClassDef listDef = context.GetClass(listTypeName);
if (null == listDef)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot deserialize list type '" + listTypeName + "' because it is unknown.");
return(false);
}
ClassValue listValue = listDef.Allocate(context);
PebbleDictionary newlist = listValue as PebbleDictionary;
variable.value = listValue;
ITypeDef keyType = listDef.typeDef.genericTypes[0];
ITypeDef valueType = listDef.typeDef.genericTypes[1];
int count = reader.ReadInt32();
Variable tempKeyVar = new Variable("tempKeyVar", keyType);
for (int ii = 0; ii < count; ++ii)
{
if (!Read(context, stream, tempKeyVar))
{
return(false);
}
Variable newelem = new Variable(null, valueType);
if (!Read(context, stream, newelem))
{
return(false);
}
newlist.dictionary.Add(tempKeyVar.value, newelem);
}
}
else if (variable.type is TypeDef_Enum)
{
string enumName = reader.ReadString();
string valueName = reader.ReadString();
// This happens.
ITypeDef streamedType = context.GetTypeByName(enumName);
if (null == streamedType)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Attempt to load saved enum of unknown type '" + enumName + "'.");
return(false);
}
// I can't get this to happen.
if (!(streamedType is TypeDef_Enum))
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Type '" + enumName + "' saved as something other than an enum, but attempted to stream into an enum variable.");
return(false);
}
ClassDef enumClassDef = context.GetClass(enumName);
Pb.Assert(null != enumClassDef, "Somehow we got a type for an enum but not the def.");
ClassDef_Enum enumDef = enumClassDef as ClassDef_Enum;
Pb.Assert(null != enumClassDef, "Registered type is enum but def is classdef.");
// This happens.
ClassValue_Enum cve = enumDef.enumDef.GetValue(valueName);
if (null == cve)
{
context.SetRuntimeError(RuntimeErrorType.EnumValueNotFound, "Enum '" + enumName + "' does not have saved value '" + valueName + "'.");
return(false);
}
variable.value = cve;
}
else if (variable.type is TypeDef_Class)
{
TypeDef_Class varType = variable.type as TypeDef_Class;
// Get class name.
string streamClassName = reader.ReadString();
if ("null" == streamClassName)
{
variable.value = null;
return(true);
}
ITypeDef streamedType = context.GetTypeByName(streamClassName);
if (null == streamedType)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Serialized type '" + streamClassName + "' not found.");
return(false);
}
if (!varType.CanStoreValue(context, streamedType))
{
context.SetRuntimeError(RuntimeErrorType.SerializeTypeMismatch, "Cannot deserialize a '" + streamClassName + "' into a variable of type '" + varType.GetName() + "'.");
return(false);
}
TypeDef_Class streamedClassType = streamedType as TypeDef_Class;
Pb.Assert(null != streamedClassType, "Somehow a streamed type is not a class but *can* be stored in a class type?!");
ClassDef streamedClassDef = context.GetClass(streamClassName);
Pb.Assert(null != streamedClassDef, "Somehow we got a type for a class but not the def.");
MemberRef serMemRef = streamedClassDef.GetMemberRef(null, "Serialize", ClassDef.SEARCH.NORMAL);
if (serMemRef.isInvalid)
{
context.SetRuntimeError(RuntimeErrorType.SerializeInvalidClass, "Serialize function of class '" + streamClassName + "' not found.");
return(false);
}
ClassValue streamedClassValue = streamedClassDef.Allocate(context);
Variable serFuncVar = streamedClassValue.Get(serMemRef);
FunctionValue serFuncVal = serFuncVar.value as FunctionValue;
serFuncVal.Evaluate(context, new List <object>()
{
stream
}, streamedClassValue);
if (context.IsRuntimeErrorSet())
{
return(false);
}
variable.value = streamedClassValue;
}
else
{
throw new Exception("Internal error: Unexpected type of value in stream Read.");
}
return(true);
}
