Fixed several seg faults and other errors in DBC code

dbc/dbc_classes.cpp

@@ -6,8 +6,30 @@
 DBC_MESSAGE::DBC_MESSAGE()
 {
     sigHandler = new DBCSignalHandler;
+    ID = 0;
+    len = 0;
+    multiplexorSignal = nullptr;
+    sender = nullptr;
 }
 
+DBC_SIGNAL::DBC_SIGNAL()
+{
+    bias = 0;
+    isMultiplexed = false;
+    isMultiplexor = false;
+    max = 1;
+    min = 0;
+    multiplexValue = 0;
+    factor = 1.0;
+    intelByteOrder = false;
+    parentMessage = nullptr;
+    receiver = nullptr;
+    signalSize = 1;
+    startBit = 1;
+    valType = DBC_SIG_VAL_TYPE::UNSIGNED_INT;
+}
+
+
 /*
  The way that the DBC file format works is kind of weird... For intel format signals you count up
 from the start bit to the end bit which is (startbit + signallength - 1). At each point

dbc/dbc_classes.h

@@ -106,6 +106,7 @@ public: //TODO: this is sloppy. It shouldn't all be public!
     QList<DBC_ATTRIBUTE_VALUE> attributes;
     QList<DBC_VAL_ENUM_ENTRY> valList;
 
+    DBC_SIGNAL();
     bool processAsText(const CANFrame &frame, QString &outString, bool outputName = true);
     bool processAsInt(const CANFrame &frame, int32_t &outValue);
     bool processAsDouble(const CANFrame &frame, double &outValue);

dbc/dbchandler.cpp

@@ -760,7 +760,7 @@ bool DBCFile::parseDefaultAttrLine(QString line)
     return false;
 }
 
-void DBCFile::loadFile(QString fileName)
+bool DBCFile::loadFile(QString fileName)
 {
     QFile *inFile = new QFile(fileName);
     QString line, rawLine;
@@ -778,7 +778,8 @@ void DBCFile::loadFile(QString fileName)
     if (!inFile->open(QIODevice::ReadOnly | QIODevice::Text))
     {
         delete inFile;
-        return;
+        qDebug() << "Could not load the file!";
+        return false;
     }
 
     qDebug() << "Starting DBC load";
@@ -1040,6 +1041,7 @@ void DBCFile::loadFile(QString fileName)
     filePath = fileName.left(fileName.length() - this->fileName.length());
     assocBuses = -1;
     isDirty = false;
+    return true;
 }
 
 QVariant DBCFile::processAttributeVal(QString input, DBC_ATTRIBUTE_VAL_TYPE typ)
@@ -1157,7 +1159,7 @@ bool DBCFile::parseAttribute(QString inpString, DBC_ATTRIBUTE &attr)
     return goodAttr;
 }
 
-void DBCFile::saveFile(QString fileName)
+bool DBCFile::saveFile(QString fileName)
 {
     int nodeNumber = 1;
     int msgNumber = 1;
@@ -1169,7 +1171,7 @@ void DBCFile::saveFile(QString fileName)
     if (!outFile->open(QIODevice::WriteOnly | QIODevice::Text))
     {
         delete outFile;
-        return;
+        return false;
     }
 
     //right now it outputs a standard hard coded boilerplate
@@ -1455,6 +1457,7 @@ void DBCFile::saveFile(QString fileName)
     QStringList fileList = fileName.split('/');
     this->fileName = fileList[fileList.length() - 1]; //whoops... same name as parameter in this function.
     filePath = fileName.left(fileName.length() - this->fileName.length());
+    return true;
 }
 
 void DBCHandler::saveDBCFile(int idx)
@@ -1544,9 +1547,16 @@ int DBCHandler::createBlankFile()
 DBCFile* DBCHandler::loadDBCFile(QString filename)
 {
     DBCFile newFile;
-    newFile.loadFile(filename);
+    if (newFile.loadFile(filename))
+    {
         loadedFiles.append(newFile);
-    return &loadedFiles.last();
+    }
+    else
+    {
+        //createBlankFile();
+    }
+    if (loadedFiles.count()> 0) return &loadedFiles.last();
+    else return nullptr;
 }
 
 //the only reason to even bother sending the index is to see if
@@ -1846,10 +1856,13 @@ DBCHandler::DBCHandler()
     // Load previously saved DBC file settings
     QSettings settings;
     int filecount = settings.value("DBC/FileCount", 0).toInt();
+    qDebug() << "Previously loaded DBC file count: " << filecount;
     for (int i=0; i<filecount; i++)
     {
         QString filename = settings.value("DBC/Filename_" + QString(i),"").toString();
         DBCFile * file = loadDBCFile(filename);
+        if (file)
+        {
             int bus = settings.value("DBC/AssocBus_" + QString(i),0).toInt();
             file->setAssocBus(bus);
 
@@ -1881,6 +1894,7 @@ DBCHandler::DBCHandler()
             qInfo() << "Loaded DBC file" << filename << " (bus:" << bus
                 << ", Matching Criteria:" << (int)matchingCriteria << "Filter labeling: " << (filterLabeling?"enabled":"disabled") << ")";
         }
+    }
 }
 
 DBCHandler* DBCHandler::getReference()

dbc/dbchandler.h

@@ -76,8 +76,8 @@ public:
     DBC_ATTRIBUTE *findAttributeByName(QString name);
     DBC_ATTRIBUTE *findAttributeByIdx(int idx);
     void findAttributesByType(DBC_ATTRIBUTE_TYPE typ, QList<DBC_ATTRIBUTE> *list);
-    void saveFile(QString);
+    bool saveFile(QString);
-    void loadFile(QString);
+    bool loadFile(QString);
     QString getFullFilename();
     QString getFilename();
     QString getPath();

dbc/dbcmaineditor.cpp

@@ -370,8 +370,8 @@ void DBCMainEditor::updatedMessage(DBC_MESSAGE *msg)
         item->setText(0, msgInfo);
         //editor could have changed the parent Node too. Have to figure out which node
         //is parent in the GUI and compare that to parent in the data.
-        DBC_NODE *oldParent = dbcFile->findNodeByName(item->parent()->text(0));
+        DBC_NODE *oldParent = dbcFile->findNodeByName(item->parent()->text(0).split(" - ")[0]);
-        if (oldParent != msg->sender)
+        if (oldParent != msg->sender && oldParent)
         {
             qDebug() << "Changed parent of message. Trying to rehome it.";
             QTreeWidgetItem *newParent = nullptr;
@@ -448,7 +448,11 @@ void DBCMainEditor::newMessage()
         nodeItem = msgItem->parent();
     }
 
-    DBC_NODE *node = dbcFile->findNodeByName(nodeItem->data(0, Qt::DisplayRole).toString());
+    //if there was a comment this will find the location of the comment and snip it out.
+    QString nodeName = nodeItem->data(0, Qt::DisplayRole).toString().split(" - ")[0];
+
+    DBC_NODE *node = dbcFile->findNodeByName(nodeName);
+    if (!node) node = dbcFile->findNodeByIdx(0);
     DBC_MESSAGE msg;
     DBC_MESSAGE *msgPtr;
     if (msgItem)
@@ -467,14 +471,14 @@ void DBCMainEditor::newMessage()
         }
         else
         {
-            msg.name = nodeItem->text(0) + "Msg" + QString::number(randGen.bounded(500));
+            msg.name = nodeName + "Msg" + QString::number(randGen.bounded(500));
             msg.ID = 0;
             msg.len = 0;
         }
     }
     else
     {
-        msg.name = nodeItem->text(0) + "Msg" + QString::number(randGen.bounded(500));
+        msg.name = nodeName + "Msg" + QString::number(randGen.bounded(500));
         msg.ID = 0;
         msg.len = 0;
     }