Add PbRemoveRepeatedFieldValue native (bug 6066, r=asherkin).

core/UserMessagePBHelpers.h

@@ -1093,6 +1093,24 @@ public:
 		return msg->GetReflection()->FieldSize(*msg, field);
 	}
 
+	inline bool RemoveRepeatedFieldValue(const char *pszFieldName, int index)
+	{
+		GETCHECK_FIELD();
+		CHECK_FIELD_REPEATED();
+		CHECK_REPEATED_ELEMENT(index);
+
+		// Protobuf guarantees that repeated field values will stay in order and so must we.
+		const protobuf::Reflection *pReflection = msg->GetReflection();
+		for (int i = index; i < elemCount - 1; ++i)
+		{
+			pReflection->SwapElements(msg, field, i, i + 1);
+		}
+
+		pReflection->RemoveLast(msg, field);
+
+		return true;
+	}
+
 private:
 	protobuf::Message *msg;
 	PBHandleList childHandles;

core/smn_protobuf.cpp

@@ -716,6 +716,19 @@ static cell_t smn_PbAddVector2D(IPluginContext *pCtx, const cell_t *params)
 	return 1;
 }
 
+static cell_t smn_PbRemoveRepeatedFieldValue(IPluginContext *pCtx, const cell_t *params)
+{
+	GET_MSG_FROM_HANDLE_OR_ERR();
+	GET_FIELD_NAME_OR_ERR();
+
+	if (!msg->RemoveRepeatedFieldValue(strField, params[3]))
+	{
+		return pCtx->ThrowNativeError("Invalid field \"%s\" for message \"%s\"", strField, msg->GetProtobufMessage()->GetTypeName().c_str());
+	}
+
+	return 1;
+}
+
 static cell_t smn_PbReadMessage(IPluginContext *pCtx, const cell_t *params)
 {
 	GET_MSG_FROM_HANDLE_OR_ERR();
@@ -794,6 +807,7 @@ REGISTER_NATIVES(protobufnatives)
 	{"PbAddAngle",					smn_PbAddAngle},
 	{"PbAddVector",					smn_PbAddVector},
 	{"PbAddVector2D",				smn_PbAddVector2D},
+	{"PbRemoveRepeatedFieldValue",	smn_PbRemoveRepeatedFieldValue},
 	{"PbReadMessage",				smn_PbReadMessage},
 	{"PbReadRepeatedMessage",		smn_PbReadRepeatedMessage},
 	{"PbAddMessage",				smn_PbAddMessage},