Enforce use of return value of a few CarlaPlugin functions

source/backend/CarlaPlugin.hpp

@@ -296,16 +296,19 @@ public:
     /*!
      * Get the plugin's label (URI for LV2 plugins).
      */
+    __attribute__((warn_unused_result))
     virtual bool getLabel(char* const strBuf) const noexcept;
 
     /*!
      * Get the plugin's maker.
      */
+    __attribute__((warn_unused_result))
     virtual bool getMaker(char* const strBuf) const noexcept;
 
     /*!
      * Get the plugin's copyright/license.
      */
+    __attribute__((warn_unused_result))
     virtual bool getCopyright(char* const strBuf) const noexcept;
 
     /*!
@@ -313,43 +316,51 @@ public:
      *
      * @see getName() and setName()
      */
+    __attribute__((warn_unused_result))
     virtual bool getRealName(char* const strBuf) const noexcept;
 
     /*!
      * Get the name of the parameter @a parameterId.
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterName(const uint32_t parameterId, char* const strBuf) const noexcept;
 
     /*!
      * Get the symbol of the parameter @a parameterId.
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterSymbol(const uint32_t parameterId, char* const strBuf) const noexcept;
 
     /*!
      * Get the custom text of the parameter @a parameterId.
      * @see PARAMETER_USES_CUSTOM_TEXT
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterText(const uint32_t parameterId, char* const strBuf) noexcept;
 
     /*!
      * Get the unit of the parameter @a parameterId.
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterUnit(const uint32_t parameterId, char* const strBuf) const noexcept;
 
     /*!
      * Get the comment (documentation) of the parameter @a parameterId.
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterComment(const uint32_t parameterId, char* const strBuf) const noexcept;
 
     /*!
      * Get the group name of the parameter @a parameterId.
      * @note The group name is prefixed by a unique symbol and ":".
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterGroupName(const uint32_t parameterId, char* const strBuf) const noexcept;
 
     /*!
      * Get the scalepoint @a scalePointId label of the parameter @a parameterId.
      */
+    __attribute__((warn_unused_result))
     virtual bool getParameterScalePointLabel(const uint32_t parameterId, const uint32_t scalePointId, char* const strBuf) const noexcept;
 
     /*!
@@ -362,6 +373,7 @@ public:
     /*!
      * Get the name of the program at @a index.
      */
+    __attribute__((warn_unused_result))
     bool getProgramName(const uint32_t index, char* const strBuf) const noexcept;
 
     /*!
@@ -369,6 +381,7 @@ public:
      *
      * @see getMidiProgramInfo()
      */
+    __attribute__((warn_unused_result))
     bool getMidiProgramName(const uint32_t index, char* const strBuf) const noexcept;
 
     /*!

source/backend/CarlaStandalone.cpp

@@ -1190,6 +1190,7 @@ const CarlaPluginInfo* carla_get_plugin_info(uint pluginId)
     carla_debug("carla_get_plugin_info(%i)", pluginId);
 
     char strBuf[STR_MAX+1];
+    carla_zeroChars(strBuf, STR_MAX+1);
 
     retInfo.type     = plugin->getType();
     retInfo.category = plugin->getCategory();
@@ -1202,17 +1203,12 @@ const CarlaPluginInfo* carla_get_plugin_info(uint pluginId)
     retInfo.optionsAvailable = plugin->getOptionsAvailable();
     retInfo.optionsEnabled   = plugin->getOptionsEnabled();
 
-    carla_zeroChars(strBuf, STR_MAX+1);
-    plugin->getLabel(strBuf);
-    retInfo.label = carla_strdup_safe(strBuf);
-
-    carla_zeroChars(strBuf, STR_MAX+1);
-    plugin->getMaker(strBuf);
-    retInfo.maker = carla_strdup_safe(strBuf);
-
-    carla_zeroChars(strBuf, STR_MAX+1);
-    plugin->getCopyright(strBuf);
-    retInfo.copyright = carla_strdup_safe(strBuf);
+    if (plugin->getLabel(strBuf))
+        retInfo.label = carla_strdup_safe(strBuf);
+    if (plugin->getMaker(strBuf))
+        retInfo.maker = carla_strdup_safe(strBuf);
+    if (plugin->getCopyright(strBuf))
+        retInfo.copyright = carla_strdup_safe(strBuf);
 
     checkStringPtr(retInfo.filename);
     checkStringPtr(retInfo.name);
@@ -1656,7 +1652,9 @@ const char* carla_get_parameter_text(uint pluginId, uint32_t parameterId)
     static char textBuf[STR_MAX+1];
     carla_zeroChars(textBuf, STR_MAX+1);
 
-    plugin->getParameterText(parameterId, textBuf);
+    if (! plugin->getParameterText(parameterId, textBuf))
+        textBuf[0] = '\0';
+
     return textBuf;
 }
 
@@ -1673,7 +1671,9 @@ const char* carla_get_program_name(uint pluginId, uint32_t programId)
     static char programName[STR_MAX+1];
     carla_zeroChars(programName, STR_MAX+1);
 
-    plugin->getProgramName(programId, programName);
+    if (! plugin->getProgramName(programId, programName))
+        programName[0] = '\0';
+
     return programName;
 }
 
@@ -1690,7 +1690,9 @@ const char* carla_get_midi_program_name(uint pluginId, uint32_t midiProgramId)
     static char midiProgramName[STR_MAX+1];
     carla_zeroChars(midiProgramName, STR_MAX+1);
 
-    plugin->getMidiProgramName(midiProgramId, midiProgramName);
+    if (! plugin->getMidiProgramName(midiProgramId, midiProgramName))
+        midiProgramName[0] = '\0';
+
     return midiProgramName;
 }
 
@@ -1705,7 +1707,9 @@ const char* carla_get_real_plugin_name(uint pluginId)
     static char realPluginName[STR_MAX+1];
     carla_zeroChars(realPluginName, STR_MAX+1);
 
-    plugin->getRealName(realPluginName);
+    if (! plugin->getRealName(realPluginName))
+        realPluginName[0] = '\0';
+
     return realPluginName;
 }
 

source/backend/engine/CarlaEngine.cpp

@@ -839,7 +839,9 @@ bool CarlaEngine::clonePlugin(const uint id)
 
     char label[STR_MAX+1];
     carla_zeroChars(label, STR_MAX+1);
-    plugin->getLabel(label);
+
+    if (! plugin->getLabel(label))
+        label[0] = '\0';
 
     const uint pluginCountBefore(pData->curPluginCount);
 
@@ -2094,6 +2096,7 @@ void CarlaEngine::saveProjectInternal(water::MemoryOutputStream& outStream) cons
     }
 
     char strBuf[STR_MAX+1];
+    carla_zeroChars(strBuf, STR_MAX+1);
 
     for (uint i=0; i < pData->curPluginCount; ++i)
     {
@@ -2106,10 +2109,7 @@ void CarlaEngine::saveProjectInternal(water::MemoryOutputStream& outStream) cons
 
             outPlugin << "\n";
 
-            strBuf[0] = '\0';
-            plugin->getRealName(strBuf);
-
-            if (strBuf[0] != '\0')
+            if (plugin->getRealName(strBuf))
                 outPlugin << " <!-- " << xmlSafeString(strBuf, true) << " -->\n";
 
             outPlugin << " <Plugin>\n";

source/backend/engine/CarlaEngineBridge.cpp

@@ -301,6 +301,8 @@ public:
             CARLA_SAFE_ASSERT(fLastPingTime > 0);
 
             char bufStr[STR_MAX+1];
+            carla_zeroChars(bufStr, STR_MAX+1);
+
             uint32_t bufStrSize;
 
             const CarlaEngineClient* const client(plugin->getEngineClient());
@@ -323,26 +325,26 @@ public:
                 // uint/size, str[] (realName), uint/size, str[] (label), uint/size, str[] (maker), uint/size, str[] (copyright)
                 fShmNonRtServerControl.writeOpcode(kPluginBridgeNonRtServerPluginInfo2);
 
-                carla_zeroChars(bufStr, STR_MAX);
-                plugin->getRealName(bufStr);
+                if (! plugin->getRealName(bufStr))
+                    bufStr[0] = '\0';
                 bufStrSize = carla_fixedValue(1U, 64U, static_cast<uint32_t>(std::strlen(bufStr)));
                 fShmNonRtServerControl.writeUInt(bufStrSize);
                 fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
 
-                carla_zeroChars(bufStr, STR_MAX);
-                plugin->getLabel(bufStr);
+                if (! plugin->getLabel(bufStr))
+                    bufStr[0] = '\0';
                 bufStrSize = carla_fixedValue(1U, 256U, static_cast<uint32_t>(std::strlen(bufStr)));
                 fShmNonRtServerControl.writeUInt(bufStrSize);
                 fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
 
-                carla_zeroChars(bufStr, STR_MAX);
-                plugin->getMaker(bufStr);
+                if (! plugin->getMaker(bufStr))
+                    bufStr[0] = '\0';
                 bufStrSize = carla_fixedValue(1U, 64U, static_cast<uint32_t>(std::strlen(bufStr)));
                 fShmNonRtServerControl.writeUInt(bufStrSize);
                 fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
 
-                carla_zeroChars(bufStr, STR_MAX);
-                plugin->getCopyright(bufStr);
+                if (! plugin->getCopyright(bufStr))
+                    bufStr[0] = '\0';
                 bufStrSize = carla_fixedValue(1U, 64U, static_cast<uint32_t>(std::strlen(bufStr)));
                 fShmNonRtServerControl.writeUInt(bufStrSize);
                 fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
@@ -453,20 +455,20 @@ public:
                         fShmNonRtServerControl.writeOpcode(kPluginBridgeNonRtServerParameterData2);
                         fShmNonRtServerControl.writeUInt(i);
 
-                        carla_zeroChars(bufStr, STR_MAX);
-                        plugin->getParameterName(i, bufStr);
+                        if (plugin->getParameterName(i, bufStr))
+                            bufStr[0] = '\0';
                         bufStrSize = carla_fixedValue(1U, 32U, static_cast<uint32_t>(std::strlen(bufStr)));
                         fShmNonRtServerControl.writeUInt(bufStrSize);
                         fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
 
-                        carla_zeroChars(bufStr, STR_MAX);
-                        plugin->getParameterSymbol(i, bufStr);
+                        if (plugin->getParameterSymbol(i, bufStr))
+                            bufStr[0] = '\0';
                         bufStrSize = carla_fixedValue(1U, 64U, static_cast<uint32_t>(std::strlen(bufStr)));
                         fShmNonRtServerControl.writeUInt(bufStrSize);
                         fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
 
-                        carla_zeroChars(bufStr, STR_MAX);
-                        plugin->getParameterUnit(i, bufStr);
+                        if (plugin->getParameterUnit(i, bufStr))
+                            bufStr[0] = '\0';
                         bufStrSize = carla_fixedValue(1U, 32U, static_cast<uint32_t>(std::strlen(bufStr)));
                         fShmNonRtServerControl.writeUInt(bufStrSize);
                         fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
@@ -517,8 +519,8 @@ public:
                     fShmNonRtServerControl.writeOpcode(kPluginBridgeNonRtServerProgramName);
                     fShmNonRtServerControl.writeUInt(i);
 
-                    carla_zeroChars(bufStr, STR_MAX);
-                    plugin->getProgramName(i, bufStr);
+                    if (plugin->getProgramName(i, bufStr))
+                        bufStr[0] = '\0';
                     bufStrSize = carla_fixedValue(1U, 32U, static_cast<uint32_t>(std::strlen(bufStr)));
                     fShmNonRtServerControl.writeUInt(bufStrSize);
                     fShmNonRtServerControl.writeCustomData(bufStr, bufStrSize);
@@ -892,17 +894,20 @@ public:
 
                 if (index >= 0 && plugin != nullptr && plugin->isEnabled())
                 {
-                    char strBuf[STR_MAX];
-                    plugin->getParameterText(static_cast<uint32_t>(index), strBuf);
-                    const uint32_t strBufLen = static_cast<uint32_t>(std::strlen(strBuf));
+                    char bufStr[STR_MAX+1];
+                    carla_zeroChars(bufStr, STR_MAX+1);
+                    if (! plugin->getParameterText(static_cast<uint32_t>(index), bufStr))
+                        bufStr[0] = '\0';
+
+                    const uint32_t bufStrLen = static_cast<uint32_t>(std::strlen(bufStr));
 
                     const CarlaMutexLocker _cml(fShmNonRtServerControl.mutex);
 
                     fShmNonRtServerControl.writeOpcode(kPluginBridgeNonRtServerSetParameterText);
 
                     fShmNonRtServerControl.writeInt(index);
-                    fShmNonRtServerControl.writeUInt(strBufLen);
-                    fShmNonRtServerControl.writeCustomData(strBuf, strBufLen);
+                    fShmNonRtServerControl.writeUInt(bufStrLen);
+                    fShmNonRtServerControl.writeCustomData(bufStr, bufStrLen);
                     fShmNonRtServerControl.commitWrite();
 
                     fShmNonRtServerControl.waitIfDataIsReachingLimit();

source/backend/engine/CarlaEngineNative.cpp

@@ -424,88 +424,97 @@ protected:
 
     void uiServerSendPluginInfo(CarlaPlugin* const plugin)
     {
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
         const uint pluginId(plugin->getId());
 
         std::sprintf(tmpBuf, "PLUGIN_INFO_%i\n", pluginId);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-        std::sprintf(tmpBuf, "%i:%i:%i:" P_INT64 ":%i:%i\n", plugin->getType(), plugin->getCategory(), plugin->getHints(), plugin->getUniqueId(), plugin->getOptionsAvailable(), plugin->getOptionsEnabled());
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        std::sprintf(tmpBuf, "%i:%i:%i:" P_INT64 ":%i:%i\n",
+                     plugin->getType(), plugin->getCategory(),
+                     plugin->getHints(), plugin->getUniqueId(),
+                     plugin->getOptionsAvailable(), plugin->getOptionsEnabled());
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         if (const char* const filename = plugin->getFilename())
         {
-            std::sprintf(tmpBuf, "%s", filename);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "%s", filename);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
         }
         else
         {
-            if (! fUiServer.writeMessage("\n"))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
         }
 
         if (const char* const name = plugin->getName())
         {
-            std::sprintf(tmpBuf, "%s", name);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "%s", name);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
         }
         else
         {
-            if (! fUiServer.writeMessage("\n"))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
         }
 
         if (const char* const iconName = plugin->getIconName())
         {
-            std::sprintf(tmpBuf, "%s", iconName);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "%s", iconName);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
         }
         else
         {
-            if (! fUiServer.writeMessage("\n"))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
         }
 
-        plugin->getRealName(tmpBuf);
-        if (! fUiServer.writeAndFixMessage(tmpBuf))
-            return;
+        if (plugin->getRealName(tmpBuf)) {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+        }
+        else
+        {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+        }
 
-        plugin->getLabel(tmpBuf);
-        if (! fUiServer.writeAndFixMessage(tmpBuf))
-            return;
+        if (plugin->getLabel(tmpBuf)) {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+        }
+        else
+        {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+        }
 
-        plugin->getMaker(tmpBuf);
-        if (! fUiServer.writeAndFixMessage(tmpBuf))
-            return;
+        if (plugin->getMaker(tmpBuf)) {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+        }
+        else
+        {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+        }
 
-        plugin->getCopyright(tmpBuf);
-        if (! fUiServer.writeAndFixMessage(tmpBuf))
-            return;
+        if (plugin->getCopyright(tmpBuf)) {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+        }
+        else
+        {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+        }
 
         std::sprintf(tmpBuf, "AUDIO_COUNT_%i:%i:%i\n", pluginId, plugin->getAudioInCount(), plugin->getAudioOutCount());
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         std::sprintf(tmpBuf, "MIDI_COUNT_%i:%i:%i\n", pluginId, plugin->getMidiInCount(), plugin->getMidiOutCount());
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         fUiServer.flushMessages();
     }
 
     void uiServerSendPluginParameters(CarlaPlugin* const plugin)
     {
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
         const CarlaScopedLocale csl;
@@ -515,12 +524,10 @@ protected:
         for (int32_t i=PARAMETER_ACTIVE; i>PARAMETER_MAX; --i)
         {
             std::sprintf(tmpBuf, "PARAMVAL_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             std::sprintf(tmpBuf, "%f\n", static_cast<double>(plugin->getInternalParameterValue(i)));
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             fUiServer.flushMessages();
         }
@@ -530,8 +537,7 @@ protected:
         count = plugin->getParameterCount();
 
         std::sprintf(tmpBuf, "PARAMETER_COUNT_%i:%i:%i:%i\n", pluginId, ins, outs, count);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         for (uint32_t i=0; i<count; ++i)
         {
@@ -539,24 +545,37 @@ protected:
             const ParameterRanges& paramRanges(plugin->getParameterRanges(i));
 
             std::sprintf(tmpBuf, "PARAMETER_DATA_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             std::sprintf(tmpBuf, "%i:%i:%i:%i\n", paramData.type, paramData.hints, paramData.midiChannel, paramData.midiCC);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-            plugin->getParameterName(i, tmpBuf);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            if (plugin->getParameterName(i, tmpBuf)) {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+            } else {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+            }
 
-            plugin->getParameterUnit(i, tmpBuf);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            if (plugin->getParameterUnit(i, tmpBuf)) {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+            } else {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+            }
+
+            if (plugin->getParameterComment(i, tmpBuf)) {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+            } else {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+            }
+
+            if (plugin->getParameterGroupName(i, tmpBuf)) {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+            } else {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+            }
 
             std::sprintf(tmpBuf, "PARAMETER_RANGES_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             std::sprintf(tmpBuf, "%f:%f:%f:%f:%f:%f\n",
                          static_cast<double>(paramRanges.def),
@@ -565,16 +584,13 @@ protected:
                          static_cast<double>(paramRanges.step),
                          static_cast<double>(paramRanges.stepSmall),
                          static_cast<double>(paramRanges.stepLarge));
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             std::sprintf(tmpBuf, "PARAMVAL_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             std::sprintf(tmpBuf, "%f\n", static_cast<double>(plugin->getParameterValue(i)));
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         }
 
         fUiServer.flushMessages();
@@ -582,8 +598,8 @@ protected:
 
     void uiServerSendPluginPrograms(CarlaPlugin* const plugin)
     {
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
@@ -591,42 +607,38 @@ protected:
 
         uint32_t count = plugin->getProgramCount();
         std::sprintf(tmpBuf, "PROGRAM_COUNT_%i:%i:%i\n", pluginId, count, plugin->getCurrentProgram());
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         for (uint32_t i=0; i<count; ++i)
         {
             std::sprintf(tmpBuf, "PROGRAM_NAME_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-            plugin->getProgramName(i, tmpBuf);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            if (plugin->getProgramName(i, tmpBuf)) {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
+            } else {
+                CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+            }
         }
 
         fUiServer.flushMessages();
 
         count = plugin->getMidiProgramCount();
         std::sprintf(tmpBuf, "MIDI_PROGRAM_COUNT_%i:%i:%i\n", pluginId, count, plugin->getCurrentMidiProgram());
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         for (uint32_t i=0; i<count; ++i)
         {
-            std::sprintf(tmpBuf, "MIDI_PROGRAM_DATA_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "MIDI_PROGRAM_DATA_%i:%i\n", pluginId, i);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             const MidiProgramData& mpData(plugin->getMidiProgramData(i));
 
-            std::sprintf(tmpBuf, "%i:%i\n", mpData.bank, mpData.program);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "%i:%i\n", mpData.bank, mpData.program);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-            std::sprintf(tmpBuf, "%s", mpData.name);
-            if (! fUiServer.writeAndFixMessage(tmpBuf))
-                return;
+            std::snprintf(tmpBuf, STR_MAX, "%s", mpData.name);
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(tmpBuf),);
         }
 
         fUiServer.flushMessages();
@@ -634,8 +646,8 @@ protected:
 
     void uiServerSendPluginProperties(CarlaPlugin* const plugin)
     {
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
@@ -643,8 +655,7 @@ protected:
 
         uint32_t count = plugin->getCustomDataCount();
         std::sprintf(tmpBuf, "CUSTOM_DATA_COUNT_%i:%i\n", pluginId, count);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         for (uint32_t i=0; i<count; ++i)
         {
@@ -655,8 +666,7 @@ protected:
                 continue;
 
             std::sprintf(tmpBuf, "CUSTOM_DATA_%i:%i\n", pluginId, i);
-            if (! fUiServer.writeMessage(tmpBuf))
-                return;
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
             if (! fUiServer.writeAndFixMessage(customData.type))
                 return;
@@ -746,28 +756,31 @@ protected:
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
         std::sprintf(tmpBuf, "ENGINE_CALLBACK_%i\n", int(action));
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
         std::sprintf(tmpBuf, "%u\n", pluginId);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
         std::sprintf(tmpBuf, "%i\n", value1);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
         std::sprintf(tmpBuf, "%i\n", value2);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
         std::sprintf(tmpBuf, "%i\n", value3);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
         {
             const CarlaScopedLocale csl;
             std::sprintf(tmpBuf, "%f\n", static_cast<double>(valuef));
         }
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
-        if (! fUiServer.writeAndFixMessage(valueStr != nullptr ? valueStr : ""))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
+
+        if (valueStr != nullptr) {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(valueStr),);
+        } else {
+            CARLA_SAFE_ASSERT_RETURN(fUiServer.writeEmptyMessage(),);
+        }
 
         fUiServer.flushMessages();
     }
@@ -794,40 +807,31 @@ protected:
         CARLA_SAFE_ASSERT_RETURN(fIsRunning,);
         CARLA_SAFE_ASSERT_RETURN(fUiServer.isPipeRunning(),);
 
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
 
 #if defined(HAVE_LIBLO) && !defined(BUILD_BRIDGE)
-        if (! fUiServer.writeAndFixMessage("osc-urls"))
-            return;
-        if (! fUiServer.writeAndFixMessage(pData->osc.getServerPathTCP()))
-            return;
-        if (! fUiServer.writeAndFixMessage(pData->osc.getServerPathUDP()))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("osc-urls\n"),);
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(pData->osc.getServerPathTCP()),);
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeAndFixMessage(pData->osc.getServerPathUDP()),);
 #endif
 
-        if (! fUiServer.writeAndFixMessage("max-plugin-number"))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("max-plugin-number\n"),);
         std::sprintf(tmpBuf, "%i\n", pData->maxPluginNumber);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-        if (! fUiServer.writeAndFixMessage("buffer-size"))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("buffer-size\n"),);
         std::sprintf(tmpBuf, "%i\n", pData->bufferSize);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
-        if (! fUiServer.writeAndFixMessage("sample-rate"))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage("sample-rate\n"),);
         {
             const CarlaScopedLocale csl;
             std::sprintf(tmpBuf, "%f\n", pData->sampleRate);
         }
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
 
         fUiServer.flushMessages();
     }
@@ -837,8 +841,8 @@ protected:
         CARLA_SAFE_ASSERT_RETURN(fIsRunning,);
         CARLA_SAFE_ASSERT_RETURN(fUiServer.isPipeRunning(),);
 
-        char tmpBuf[STR_MAX];
-        carla_zeroChars(tmpBuf, STR_MAX);
+        char tmpBuf[STR_MAX+1];
+        carla_zeroChars(tmpBuf, STR_MAX+1);
 
         const EngineOptions& options(pData->options);
         const CarlaMutexLocker cml(fUiServer.getPipeLock());
@@ -847,28 +851,23 @@ protected:
         const std::size_t optionsForcedStrSize(fOptionsForced ? 5 : 6);
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PROCESS_MODE);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         std::sprintf(tmpBuf, "%i\n", options.processMode);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_TRANSPORT_MODE);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         std::sprintf(tmpBuf, "%i\n", options.transportMode);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_FORCE_STEREO);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         if (! fUiServer.writeMessage(options.forceStereo ? "true\n" : "false\n"))
@@ -876,8 +875,7 @@ protected:
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PREFER_PLUGIN_BRIDGES);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         if (! fUiServer.writeMessage(options.preferPluginBridges ? "true\n" : "false\n"))
@@ -885,8 +883,7 @@ protected:
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PREFER_UI_BRIDGES);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         if (! fUiServer.writeMessage(options.preferUiBridges ? "true\n" : "false\n"))
@@ -894,8 +891,7 @@ protected:
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_UIS_ALWAYS_ON_TOP);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         if (! fUiServer.writeMessage(options.uisAlwaysOnTop ? "true\n" : "false\n"))
@@ -903,43 +899,35 @@ protected:
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_MAX_PARAMETERS);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         std::sprintf(tmpBuf, "%i\n", options.maxParameters);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_UI_BRIDGES_TIMEOUT);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage(optionsForcedStr, optionsForcedStrSize))
             return;
         std::sprintf(tmpBuf, "%i\n", options.uiBridgesTimeout);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PATH_BINARIES);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage("true\n", 5))
             return;
         std::sprintf(tmpBuf, "%s\n", options.binaryDir);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
 
         std::sprintf(tmpBuf, "ENGINE_OPTION_%i\n", ENGINE_OPTION_PATH_RESOURCES);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         if (! fUiServer.writeMessage("true\n", 5))
             return;
         std::sprintf(tmpBuf, "%s\n", options.resourceDir);
-        if (! fUiServer.writeMessage(tmpBuf))
-            return;
+        CARLA_SAFE_ASSERT_RETURN(fUiServer.writeMessage(tmpBuf),);
         fUiServer.flushMessages();
     }
 
@@ -965,8 +953,10 @@ protected:
                 const ParameterData& paramData(plugin->getParameterData(index));
                 const ParameterRanges& paramRanges(plugin->getParameterRanges(index));
 
-                plugin->getParameterName(index, strBufName);
-                plugin->getParameterUnit(index, strBufUnit);
+                if (! plugin->getParameterName(index, strBufName))
+                    carla_zeroChars(strBufName, STR_MAX+1);
+                if (! plugin->getParameterUnit(index, strBufUnit))
+                    carla_zeroChars(strBufUnit, STR_MAX+1);
 
                 uint hints = 0x0;
 

source/backend/engine/CarlaEngineOscSend.cpp

@@ -60,10 +60,14 @@ void CarlaEngineOsc::sendPluginInfo(const CarlaPlugin* const plugin) const noexc
     carla_zeroChars(bufMaker, STR_MAX+1);
     carla_zeroChars(bufCopyright, STR_MAX+1);
 
-    plugin->getRealName(bufRealName);
-    plugin->getLabel(bufLabel);
-    plugin->getMaker(bufMaker);
-    plugin->getCopyright(bufCopyright);
+    if (! plugin->getRealName(bufRealName))
+        bufRealName[0] = '\0';
+    if (! plugin->getLabel(bufLabel))
+        bufLabel[0] = '\0';
+    if (! plugin->getMaker(bufMaker))
+        bufMaker[0] = '\0';
+    if (! plugin->getCopyright(bufCopyright))
+        bufCopyright[0] = '\0';
 
     const char* name = plugin->getName();
     const char* filename = plugin->getFilename();
@@ -131,12 +135,14 @@ void CarlaEngineOsc::sendPluginParameterInfo(const CarlaPlugin* const plugin, co
     carla_zeroChars(bufName, STR_MAX+1);
     carla_zeroChars(bufUnit, STR_MAX+1);
 
+    if (! plugin->getParameterName(index, bufName))
+        bufName[0] = '\0';
+    if (! plugin->getParameterUnit(index, bufUnit))
+        bufUnit[0] = '\0';
+
     const ParameterData& paramData(plugin->getParameterData(index));
     const ParameterRanges& paramRanges(plugin->getParameterRanges(index));
 
-    plugin->getParameterName(index, bufName);
-    plugin->getParameterUnit(index, bufUnit);
-
     char targetPath[std::strlen(fControlDataTCP.path)+20];
     std::strcpy(targetPath, fControlDataTCP.path);
     std::strcat(targetPath, "/param");
@@ -197,7 +203,8 @@ void CarlaEngineOsc::sendPluginProgram(const CarlaPlugin* const plugin, const ui
 
     char strBuf[STR_MAX+1];
     carla_zeroChars(strBuf, STR_MAX+1);
-    plugin->getProgramName(index, strBuf);
+    if (! plugin->getProgramName(index, strBuf))
+        strBuf[0] = '\0';
 
     char targetPath[std::strlen(fControlDataTCP.path)+6];
     std::strcpy(targetPath, fControlDataTCP.path);

source/backend/plugin/CarlaPlugin.cpp

@@ -476,7 +476,8 @@ void CarlaPlugin::randomizeParameters() noexcept
         if ((paramData.hints & PARAMETER_IS_ENABLED) == 0)
             continue;
 
-        getParameterName(i, strBuf);
+        if (! getParameterName(i, strBuf))
+            strBuf[0] = '\0';
 
         if (std::strstr(strBuf, "olume") != nullptr)
             continue;
@@ -513,11 +514,13 @@ const CarlaStateSave& CarlaPlugin::getStateSave(const bool callPrepareForSave)
     const PluginType pluginType(getType());
 
     char strBuf[STR_MAX+1];
+    carla_zeroChars(strBuf, STR_MAX+1);
 
     // ---------------------------------------------------------------
     // Basic info
 
-    getLabel(strBuf);
+    if (! getLabel(strBuf))
+        strBuf[0] = '\0';
 
     pData->stateSave.type     = carla_strdup(getPluginTypeAsString(pluginType));
     pData->stateSave.name     = carla_strdup(pData->name);
@@ -608,10 +611,12 @@ const CarlaStateSave& CarlaPlugin::getStateSave(const bool callPrepareForSave)
         stateParameter->midiChannel = paramData.midiChannel;
 #endif
 
-        getParameterName(i, strBuf);
+        if (! getParameterName(i, strBuf))
+            strBuf[0] = '\0';
         stateParameter->name = carla_strdup(strBuf);
 
-        getParameterSymbol(i, strBuf);
+        if (! getParameterSymbol(i, strBuf))
+            strBuf[0] = '\0';
         stateParameter->symbol = carla_strdup(strBuf);;
 
         if (! dummy)
@@ -650,11 +655,12 @@ const CarlaStateSave& CarlaPlugin::getStateSave(const bool callPrepareForSave)
 
 void CarlaPlugin::loadStateSave(const CarlaStateSave& stateSave)
 {
-    char strBuf[STR_MAX+1];
     const bool usesMultiProgs(pData->hints & PLUGIN_USES_MULTI_PROGS);
-
     const PluginType pluginType(getType());
 
+    char strBuf[STR_MAX+1];
+    carla_zeroChars(strBuf, STR_MAX+1);
+
     // ---------------------------------------------------------------
     // Part 1 - PRE-set custom data (only those which reload programs)
 
@@ -695,10 +701,7 @@ void CarlaPlugin::loadStateSave(const CarlaStateSave& stateSave)
         {
             for (uint32_t i=0; i < pData->prog.count; ++i)
             {
-                strBuf[0] = '\0';
-                getProgramName(i, strBuf);
-
-                if (strBuf[0] != '\0' && std::strcmp(stateSave.currentProgramName, strBuf) == 0)
+                if (getProgramName(i, strBuf) && std::strcmp(stateSave.currentProgramName, strBuf) == 0)
                 {
                     programId = static_cast<int32_t>(i);
                     break;
@@ -726,10 +729,7 @@ void CarlaPlugin::loadStateSave(const CarlaStateSave& stateSave)
     {
         for (uint32_t i=0; i < pData->param.count; ++i)
         {
-            strBuf[0] = '\0';
-            getParameterSymbol(i, strBuf);
-
-            if (strBuf[0] != '\0')
+            if (getParameterSymbol(i, strBuf))
             {
                 ParamSymbol* const paramSymbol(new ParamSymbol(i, strBuf));
                 paramSymbols.append(paramSymbol);
@@ -1167,7 +1167,8 @@ bool CarlaPlugin::exportAsLV2(const char* const lv2path)
 
         char strBufName[STR_MAX+1];
         char strBufSymbol[STR_MAX+1];
-        strBufName[STR_MAX] = strBufSymbol[STR_MAX] = '\0';
+        carla_zeroChars(strBufName, STR_MAX+1);
+        carla_zeroChars(strBufSymbol, STR_MAX+1);
 
         for (uint32_t i=0; i<pData->param.count; ++i)
         {
@@ -1191,9 +1192,10 @@ bool CarlaPlugin::exportAsLV2(const char* const lv2path)
 
             // TODO logarithmic, enabled (not on gui), automable, samplerate, scalepoints
 
-            strBufName[0] = strBufSymbol[0] = '\0';
-            getParameterName(i, strBufName);
-            getParameterSymbol(i, strBufSymbol);
+            if (! getParameterName(i, strBufName))
+                strBufName[0] = '\0';
+            if (! getParameterSymbol(i, strBufSymbol))
+                strBufSymbol[0] = '\0';
 
             if (strBufSymbol[0] == '\0')
             {
@@ -1211,10 +1213,7 @@ bool CarlaPlugin::exportAsLV2(const char* const lv2path)
             }
 
             if (uniqueSymbolNames.contains(strBufSymbol))
-            {
                 std::snprintf(strBufSymbol, STR_MAX, "clv2_param_%d", i+1);
-                strBufSymbol[STR_MAX] = '\0';
-            }
 
             mainStream << "        lv2:index " << portIndexNum << " ;\n";
             mainStream << "        lv2:symbol \"" << strBufSymbol << "\" ;\n";
@@ -1228,9 +1227,11 @@ bool CarlaPlugin::exportAsLV2(const char* const lv2path)
             mainStream << "    ] ;\n";
         }
 
-        char strBuf[STR_MAX];
-        getMaker(strBuf);
-        strBuf[STR_MAX-1] = '\0';
+        char strBuf[STR_MAX+1];
+        carla_zeroChars(strBuf, STR_MAX+1);
+
+        if (! getMaker(strBuf))
+            strBuf[0] = '\0';
 
         mainStream << "    rdfs:comment \"Plugin generated using Carla LV2 export.\" ;\n";
         mainStream << "    doap:name \"\"\"" << getName() << "\"\"\" ;\n";

source/native-plugins/resources/carla-plugin

@@ -286,6 +286,8 @@ class CarlaMiniW(ExternalUI, HostWindow):
                 'name': paramName,
                 'symbol': "",
                 'unit': paramUnit,
+                'comment': paramUnit,
+                'groupName': paramUnit,
                 'scalePointCount': 0,
             }
             self.host._set_parameterInfo(pluginId, paramId, paramInfo)

source/utils/CarlaPipeUtils.cpp

@@ -925,6 +925,14 @@ bool CarlaPipeCommon::writeAndFixMessage(const char* const msg) const noexcept
     return _writeMsgBuffer(fixedMsg, size+1);
 }
 
+bool CarlaPipeCommon::writeEmptyMessage() const noexcept
+{
+    if (pData->pipeClosed)
+        return false;
+
+    return _writeMsgBuffer("\n", 1);
+}
+
 bool CarlaPipeCommon::flushMessages() const noexcept
 {
     CARLA_SAFE_ASSERT_RETURN(pData->pipeSend != INVALID_PIPE_VALUE, false);

source/utils/CarlaPipeUtils.hpp

@@ -164,6 +164,11 @@ public:
      */
     bool writeAndFixMessage(const char* const msg) const noexcept;
 
+    /*!
+     * Write an empty message, which means a single '\n'.
+     */
+    bool writeEmptyMessage() const noexcept;
+
     /*!
      * Flush all messages currently in cache.
      */