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Overhaul the handling of return values in LuaProbe

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This commit is contained in:
jyelon
2025-04-08 18:53:26 -04:00
parent a18d8e1f0b
commit 3423c01807
6 changed files with 100 additions and 194 deletions
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Content/Luprex/lxGameMode.uasset LFS
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147
Source/Integration/LuaCall.cpp
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@@ -169,16 +169,14 @@ void FlxParsedProto::Parse(const FString &str) {
UFunction *UlxLuaCallLibrary::GetArgumentPacker(const FString &Type)
{
FString LType = Type.ToLower();
FName PackerName(FString::Printf(TEXT("LuaCallArgument_%s"), *LType));
FName PackerName(FString::Printf(TEXT("LuaCallArgument_%s"), *Type));
return UlxLuaCallLibrary::StaticClass()->FindFunctionByName(PackerName);
}
UFunction *UlxLuaCallLibrary::GetReturnValueUnpacker(const FString &Type)
{
FString LType = Type.ToLower();
FName PackerName(FString::Printf(TEXT("LuaCallReturnValue_%s"), *LType));
return UlxLuaCallLibrary::StaticClass()->FindFunctionByName(PackerName);
FName PackerName(FString::Printf(TEXT("Read%s"), *Type));
return UlxLuaValues::StaticClass()->FindFunctionByName(PackerName);
}
FString UlxLuaCallLibrary::AllFunctionsWithPrefix(const TCHAR *Prefix)
@@ -223,41 +221,36 @@ void UlxLuaCallLibrary::LuaCallInvoke(UObject *context, AActor *place)
}
bool UlxLuaCallLibrary::LuaCallProbe(UObject *context, AActor *place)
bool UlxLuaCallLibrary::LuaCallProbe(UObject *context, AActor *place, UlxLuaValues *&ReturnArray)
{
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetBuffer();
if (NotInitialized(sb)) return false;
mode->LuaCallEnd(InvocationKind::LUA_PROBE, place);
FlxStreamBuffer &result = mode->LuaCallGetResult();
SimpleDynamicTag tag = result.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::STRING)
{
ReturnArray = mode->LuaCallEnd(InvocationKind::LUA_PROBE, place);
if ((ReturnArray == nullptr) || (ReturnArray->Length() < 1))
{
UE_LOG(LogLuprexIntegration, Error, TEXT("corruption in lua_probe"));
ReturnArray = nullptr;
return false;
}
FString ErrorMessage = result.read_fstring();
ElxSuccessOrError Status;
FString ErrorMessage;
ReturnArray->ReadString(Status, ErrorMessage);
if (Status != ElxSuccessOrError::Success)
{
UE_LOG(LogLuprexIntegration, Error, TEXT("corruption in lua_probe"));
ReturnArray = nullptr;
return false;
}
if (!ErrorMessage.IsEmpty())
{
UE_LOG(LogLuprex, Error, TEXT("%s"), *ErrorMessage);
ReturnArray = nullptr;
return false;
}
return true;
}
UlxLuaValues *UlxLuaCallLibrary::LuaCallGetRest(UObject *context)
{
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
UlxLuaValues *Values = NewObject<UlxLuaValues>(context);
if (!Values->Initialize(sb.view()))
{
UE_LOG(LogBlueprint, Error, TEXT("Lua call returned corrupt data"));
return nullptr;
}
return Values;
}
/////////////////////////////////////////////////////////////////
//
// Argument Packing functions
@@ -330,98 +323,6 @@ void UlxLuaCallLibrary::LuaCallArgument_boolean(UObject *context, bool pbool) {
}
/////////////////////////////////////////////////////////////////
//
// Return Value Unpacking functions
//
/////////////////////////////////////////////////////////////////
FString UlxLuaCallLibrary::LuaCallReturnValue_string(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::STRING)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a string"));
return TEXT("");
}
return sb.read_fstring();
}
FName UlxLuaCallLibrary::LuaCallReturnValue_name(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::TOKEN)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a name"));
return FName();
}
return sb.read_fname();
}
double UlxLuaCallLibrary::LuaCallReturnValue_float(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::NUMBER)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a float"));
return 0.0;
}
return sb.read_double();
}
int UlxLuaCallLibrary::LuaCallReturnValue_int(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::NUMBER)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a number"));
return 0;
}
return int(sb.read_double());
}
FVector UlxLuaCallLibrary::LuaCallReturnValue_vector(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::VECTOR)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a vector"));
return FVector();
}
return sb.read_fvector();
}
FVector2D UlxLuaCallLibrary::LuaCallReturnValue_vector2d(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::VECTOR)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a vector"));
return FVector2D();
}
FVector v = sb.read_fvector();
return FVector2D(v.X, v.Y);
}
bool UlxLuaCallLibrary::LuaCallReturnValue_boolean(UObject *context) {
ALuprexGameModeBase *mode = ALuprexGameModeBase::FromContext(context);
FlxStreamBuffer &sb = mode->LuaCallGetResult();
SimpleDynamicTag tag = sb.read_simple_dynamic_tag();
if (tag != SimpleDynamicTag::BOOLEAN)
{
UE_LOG(LogBlueprint, Error, TEXT("expected lua to return a boolean"));
return false;
}
return sb.read_bool();
}
/////////////////////////////////////////////////////////////////
//
// Returning the rest of the lua return values as an array.
@@ -478,6 +379,8 @@ FString UlxLuaValues::DebugString() const
{
if (i > 0) Output << TEXT(", ");
if (i == Cursor) Output << TEXT("^ ");
ElxLuaValueType Type = Types[i];
FlxStreamBuffer Decoder(Data[i]);
switch (Type)
@@ -517,6 +420,16 @@ ElxSuccessOrError UlxLuaValues::CheckType(ElxLuaValueType Type, ElxLuaValueType
return ElxSuccessOrError::Success;
}
void UlxLuaValues::DiscardBeforeCursor()
{
if (Cursor <= 0) return;
int Discard = Cursor;
if (Discard > Types.Num()) Discard = Types.Num();
Types.RemoveAt(0, Discard);
Data.RemoveAt(0, Discard);
Cursor -= Discard;
}
ElxLuaValueType UlxLuaValues::NextType() const
{
if (Cursor < 0) return ElxLuaValueType::End;

33
Source/Integration/LuaCall.h
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@@ -149,11 +149,8 @@ public:
static void LuaCallInvoke(UObject *context, AActor *Place);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", ExpandBoolAsExecs="ReturnValue", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static bool LuaCallProbe(UObject *context, AActor *Place);
static bool LuaCallProbe(UObject *context, AActor *Place, UlxLuaValues *&ReturnArray);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static UlxLuaValues *LuaCallGetRest(UObject *context);
//
// Functions that pack arguments into the call buffer.
//
@@ -178,31 +175,6 @@ public:
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static void LuaCallArgument_boolean(UObject *context, bool Value);
//
// Functions that extract return values from the return buffer.
//
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static FString LuaCallReturnValue_string(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static FName LuaCallReturnValue_name(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static double LuaCallReturnValue_float(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static int LuaCallReturnValue_int(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static FVector LuaCallReturnValue_vector(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static FVector2D LuaCallReturnValue_vector2d(UObject *context);
UFUNCTION(BlueprintCallable, meta = (WorldContext = "context", BlueprintInternalUseOnly = "true"), Category = "Luprex|Call Lua Function")
static bool LuaCallReturnValue_boolean(UObject *context);
};
@@ -253,6 +225,9 @@ public:
//
bool Initialize(std::string_view data);
UFUNCTION(BlueprintCallable, Category = "Luprex|Lua Value Array")
void DiscardBeforeCursor();
UFUNCTION(BlueprintPure, Category = "Luprex|Lua Value Array")
FString DebugString() const;

75
Source/Integration/LuaCallNode.cpp
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@@ -48,7 +48,7 @@
const FName UK2Node_LuaInvoke::FunctionPinName(TEXT("Lua Function Prototype"));
const FName UK2Node_LuaInvoke::PlacePinName(TEXT("Place Tangible"));
const FName UK2Node_LuaInvoke::ExtraResultsPinName(TEXT("Extra Results"));
const FName UK2Node_LuaInvoke::ErrorPinName(TEXT("Lua Error"));
const FName UK2Node_LuaInvoke::ErrorPinName(TEXT("Error"));
bool UK2Node_LuaInvoke::IsPrefix(const UEdGraphPin *Pin, char Prefix)
{
@@ -174,8 +174,9 @@ void UK2Node_LuaInvoke::CreateCorrectPins()
{
Pins.Emplace(*OldPin);
OldPins.Remove(Name);
return true;
}
return OldPin != nullptr;
return false;
};
if (!KeepPin(UEdGraphSchema_K2::PN_Execute))
@@ -239,7 +240,7 @@ void UK2Node_LuaInvoke::CreateCorrectPins()
ErrorMsg = FString::Printf(TEXT("Unknown return value type: %s"), *Pin.Type);
continue;
}
FEdGraphPinType PinType = GetPinType(Accessor->GetReturnProperty());
FEdGraphPinType PinType = GetPinType(Accessor->FindPropertyByName(TEXT("Result")));
if (!KeepPin(PrefixedName, PinType))
{
CreatePin(EGPD_Output, PinType, PrefixedName);
@@ -384,58 +385,70 @@ void UK2Node_LuaInvoke::ExpandNode(class FKismetCompilerContext& CompilerContext
}
// Add the invoke or probe node.
UEdGraphPin *ReturnArrayPin = nullptr;
if (IsInvoke())
{
UK2Node_CallFunction* ActionNode = MakeCallFunctionNode(LuaCallLibraryFunction(LuaCallInvoke));
CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(PlacePinName, EGPD_Input), *ActionNode->FindPinChecked(TEXT("Place")));
CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(PlacePinName), *ActionNode->FindPinChecked(TEXT("Place")));
ThenPin->MakeLinkTo(ActionNode->GetExecPin());
ThenPin = ActionNode->GetThenPin();
}
else
{
UK2Node_CallFunction* ActionNode = MakeCallFunctionNode(LuaCallLibraryFunction(LuaCallProbe));
CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(PlacePinName, EGPD_Input), *ActionNode->FindPinChecked(TEXT("Place")));
CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(ErrorPinName, EGPD_Output), *ActionNode->FindPinChecked(TEXT("False")));
CompilerContext.MovePinLinksToIntermediate(*FindPinChecked(PlacePinName), *ActionNode->FindPinChecked(TEXT("Place")));
CompilerContext.CopyPinLinksToIntermediate(*FindPinChecked(ErrorPinName), *ActionNode->FindPinChecked(TEXT("False")));
ReturnArrayPin = ActionNode->FindPinChecked(TEXT("ReturnArray"));
ThenPin->MakeLinkTo(ActionNode->GetExecPin());
ThenPin = ActionNode->FindPinChecked(TEXT("True"));
}
// Add Unpacking operations for all return value pins.
for (const FlxParsedProto::Pin &PinInfo : ParsedProto.ReturnValues)
if (IsInvoke())
{
UEdGraphPin *Pin = FindPinChecked(AddPrefix(PinInfo.Name, 'R'));
UFunction *UnpackingFunc = UlxLuaCallLibrary::GetReturnValueUnpacker(PinInfo.Type);
if (UnpackingFunc == nullptr)
// Make sure we didn't have return values for an invoke.
if (IsInvoke() && ((ParsedProto.ReturnValues.Num() > 0) || (ParsedProto.ExtraReturnValues)))
{
// This codepath should be unreachable, but just in case.
CompilerContext.MessageLog.Error(TEXT("All return value pins must have known types."));
continue;
CompilerContext.MessageLog.Error(TEXT("Lua Call in Invoke mode does not support return values"));
}
UK2Node_CallFunction *UnpackNode = MakeCallFunctionNode(UnpackingFunc);
CompilerContext.MovePinLinksToIntermediate(*Pin, *UnpackNode->FindPinChecked(UEdGraphSchema_K2::PN_ReturnValue));
ThenPin->MakeLinkTo(UnpackNode->GetExecPin());
ThenPin = UnpackNode->GetThenPin();
}
// If there is an extra results pin, hook it up.
if (ParsedProto.ExtraReturnValues)
else
{
UEdGraphPin *Pin = FindPinChecked(ExtraResultsPinName);
UK2Node_CallFunction *UnpackNode = MakeCallFunctionNode(LuaCallLibraryFunction(LuaCallGetRest));
CompilerContext.MovePinLinksToIntermediate(*Pin, *UnpackNode->FindPinChecked(UEdGraphSchema_K2::PN_ReturnValue));
ThenPin->MakeLinkTo(UnpackNode->GetExecPin());
ThenPin = UnpackNode->GetThenPin();
// Add Unpacking operations for all return value pins.
for (const FlxParsedProto::Pin &PinInfo : ParsedProto.ReturnValues)
{
UEdGraphPin *Pin = FindPinChecked(AddPrefix(PinInfo.Name, 'R'));
UFunction *UnpackingFunc = UlxLuaCallLibrary::GetReturnValueUnpacker(PinInfo.Type);
if (UnpackingFunc == nullptr)
{
// This codepath should be unreachable, but just in case.
CompilerContext.MessageLog.Error(TEXT("All return value pins must have known types."));
continue;
}
UK2Node_CallFunction *UnpackNode = MakeCallFunctionNode(UnpackingFunc);
ReturnArrayPin->MakeLinkTo(UnpackNode->FindPinChecked(UEdGraphSchema_K2::PN_Self));
CompilerContext.CopyPinLinksToIntermediate(*FindPinChecked(ErrorPinName), *UnpackNode->FindPinChecked(TEXT("Error")));
CompilerContext.MovePinLinksToIntermediate(*Pin, *UnpackNode->FindPinChecked(TEXT("Result")));
ThenPin->MakeLinkTo(UnpackNode->GetExecPin());
ThenPin = UnpackNode->FindPinChecked(TEXT("Success"));
}
// If there is an extra results pin, hook it up.
if (ParsedProto.ExtraReturnValues)
{
UEdGraphPin *ExtraPin = FindPinChecked(ExtraResultsPinName);
UFunction *DiscardFunc = UlxLuaValues::StaticClass()->FindFunctionByName(TEXT("DiscardBeforeCursor"));
UK2Node_CallFunction *DiscardNode = MakeCallFunctionNode(DiscardFunc);
ReturnArrayPin->MakeLinkTo(DiscardNode->FindPinChecked(UEdGraphSchema_K2::PN_Self));
ThenPin->MakeLinkTo(DiscardNode->GetExecPin());
ThenPin = DiscardNode->GetThenPin();
CompilerContext.MovePinLinksToIntermediate(*ExtraPin, *ReturnArrayPin);
}
}
// Link up the Exec pins.
CompilerContext.MovePinLinksToIntermediate(*GetExecPin(), *BeginNode->GetExecPin());
CompilerContext.MovePinLinksToIntermediate(*GetThenPin(), *ThenPin);
// Make sure we didn't have return values for an invoke.
if (IsInvoke() && ((ParsedProto.ReturnValues.Num() > 0) || (ParsedProto.ExtraReturnValues)))
{
CompilerContext.MessageLog.Error(TEXT("Lua Call in Invoke mode does not support return values"));
}
BreakAllNodeLinks();
}

23
Source/Integration/LuprexGameModeBase.cpp
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@@ -6,6 +6,7 @@
#include "ConsoleOutput.h"
#include "Tangible.h"
#include "TangibleManager.h"
#include "LuaCall.h"
#include "Blueprint/UserWidget.h"
#include "Kismet/GameplayStatics.h"
@@ -168,29 +169,35 @@ void ALuprexGameModeBase::UpdatePossessedTangible() {
}
}
void ALuprexGameModeBase::LuaCallEnd(InvocationKind kind, int64 place_id) {
UlxLuaValues *ALuprexGameModeBase::LuaCallEnd(InvocationKind kind, int64 place_id) {
std::string_view datapk = LuaCallBuffer.view();
FlxLockedWrapper w(LockableWrapper);
if (place_id == 0) place_id = w.GetActor();
uint32_t retpklen;
const char *retpk;
w->play_call_function(w.Get(), kind, place_id, datapk.size(), datapk.data(), &retpklen, &retpk);
LuaCallResult.open(std::string_view(retpk, retpklen));
if (kind == InvocationKind::LUA_PROBE)
{
UlxLuaValues *Result = NewObject<UlxLuaValues>(this);
Result->Initialize(std::string_view(retpk, retpklen));
return Result;
}
else return nullptr;
}
void ALuprexGameModeBase::LuaCallEnd(InvocationKind kind) {
LuaCallEnd(kind, int64(0));
UlxLuaValues *ALuprexGameModeBase::LuaCallEnd(InvocationKind kind) {
return LuaCallEnd(kind, int64(0));
}
void ALuprexGameModeBase::LuaCallEnd(InvocationKind kind, AActor *place) {
UlxLuaValues *ALuprexGameModeBase::LuaCallEnd(InvocationKind kind, AActor *place) {
if (place == nullptr) {
LuaCallEnd(kind, int64(0));
return LuaCallEnd(kind, int64(0));
} else {
UlxTangible *tan = UlxTangible::GetActorTangibleOrLog(place);
if (tan == nullptr) {
LuaCallResult.clear();
return NewObject<UlxLuaValues>(this);
} else {
LuaCallEnd(kind, tan->TangibleId);
return LuaCallEnd(kind, tan->TangibleId);
}
}
}

12
Source/Integration/LuprexGameModeBase.h
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@@ -124,11 +124,10 @@ public:
//
FlxStreamBuffer &LuaCallBegin() { LuaCallBuffer.clear(); return LuaCallBuffer; }
FlxStreamBuffer &LuaCallGetBuffer() { return LuaCallBuffer; }
void LuaCallEnd(InvocationKind kind);
void LuaCallEnd(InvocationKind kind, int64 place_id);
void LuaCallEnd(InvocationKind kind, AActor *place);
FlxStreamBuffer &LuaCallGetResult() { return LuaCallResult; }
void LuaCallClear() { LuaCallBuffer.clear(); LuaCallResult.clear(); }
UlxLuaValues *LuaCallEnd(InvocationKind kind);
UlxLuaValues *LuaCallEnd(InvocationKind kind, int64 place_id);
UlxLuaValues *LuaCallEnd(InvocationKind kind, AActor *place);
void LuaCallClear() { LuaCallBuffer.clear(); }
// Execute a debugging command, typed on the GUI.
void ExecuteDebuggingCommand(FlxLockedWrapper &w, const FString &fs);
@@ -191,9 +190,8 @@ public:
// To access it, construct a FlxLockedWrapper.
FlxLockableWrapper LockableWrapper;
// The Lua Call assembly buffer.
// The Lua Call Assembly Buffer.
FlxStreamBuffer LuaCallBuffer;
FlxStreamBuffer LuaCallResult;
// This utility runs the luprex update and socket update in a thread.
FTriggeredTask LuprexUpdateTask;