diff --git a/src/libs/vdxf/libdxfrw/drw_header.cpp b/src/libs/vdxf/libdxfrw/drw_header.cpp
index d63edd913..82caba0b5 100644
--- a/src/libs/vdxf/libdxfrw/drw_header.cpp
+++ b/src/libs/vdxf/libdxfrw/drw_header.cpp
@@ -51,7 +51,7 @@ void DRW_Header::parseCode(int code, dxfReader *reader){
     case 1:
         curr->addString(reader->getUtf8String());
         if (name =="$ACADVER") {
-            reader->setVersion(curr->content.s, true);
+            reader->setVersion(*curr->content.s, true);
             version = reader->getVersion();
         }
         curr->code = code;
@@ -67,7 +67,7 @@ void DRW_Header::parseCode(int code, dxfReader *reader){
     case 3:
         curr->addString(reader->getUtf8String());
         if (name =="$DWGCODEPAGE") {
-            reader->setCodePage(curr->content.s);
+            reader->setCodePage(*curr->content.s);
             curr->addString(reader->getCodePage());
         }
         curr->code = code;
@@ -138,7 +138,7 @@ void DRW_Header::write(dxfWriter *writer, DRW::Version ver){
         break;
     }
     writer->writeString(1, varStr);
-    writer->setVersion(&varStr, true);
+    writer->setVersion(varStr, true);
 
     getStr("$ACADVER", &varStr);
     getStr("$ACADMAINTVER", &varStr);
@@ -147,7 +147,7 @@ void DRW_Header::write(dxfWriter *writer, DRW::Version ver){
         varStr = "ANSI_1252";
     }
     writer->writeString(9, "$DWGCODEPAGE");
-    writer->setCodePage(&varStr);
+    writer->setCodePage(varStr);
     writer->writeString(3, writer->getCodePage() );
     writer->writeString(9, "$INSBASE");
     if (getCoord("$INSBASE", &varCoord)) {
diff --git a/src/libs/vdxf/libdxfrw/intern/drw_dbg.cpp b/src/libs/vdxf/libdxfrw/intern/drw_dbg.cpp
index 58042c4b1..999e065a3 100644
--- a/src/libs/vdxf/libdxfrw/intern/drw_dbg.cpp
+++ b/src/libs/vdxf/libdxfrw/intern/drw_dbg.cpp
@@ -12,9 +12,10 @@
 
 #include <iostream>
 #include <iomanip>
+#include <memory>
 #include "drw_dbg.h"
 
-DRW_dbg *DRW_dbg::instance= NULL;
+DRW_dbg *DRW_dbg::instance{nullptr};
 
 /*********private clases*************/
 class print_none {
@@ -27,54 +28,45 @@ public:
     virtual void printB(int i){(void)i;}
     virtual void printHL(int c, int s, int h){(void)c;(void)s;(void)h;}
     virtual void printPT(double x, double y, double z){(void)x;(void)y;(void)z;}
-    print_none(){}
-    virtual ~print_none(){}
+    print_none()= default;
+    virtual ~print_none()=default;
 };
 
 class print_debug : public print_none {
 public:
-    virtual void printS(const std::string &s) override;
-    virtual void printI(long long int i) override;
-    virtual void printUI(long long unsigned int i) override;
-    virtual void printD(double d) override;
-    virtual void printH(long long int i) override;
-    virtual void printB(int i) override;
-    virtual void printHL(int c, int s, int h) override;
-    virtual void printPT(double x, double y, double z) override;
-    print_debug();
-    virtual ~print_debug() = default;
+    void printS(const std::string &s) override;
+    void printI(long long int i) override;
+    void printUI(long long unsigned int i) override;
+    void printD(double d) override;
+    void printH(long long int i) override;
+    void printB(int i) override;
+    void printHL(int c, int s, int h) override;
+    void printPT(double x, double y, double z) override;
+    print_debug()=default;
 private:
-    std::ios_base::fmtflags flags;
+    std::ios_base::fmtflags flags{std::cerr.flags()};
 };
 
 /********* debug class *************/
 DRW_dbg *DRW_dbg::getInstance(){
-    if (instance == NULL){
+    if (instance == nullptr){
         instance = new DRW_dbg;
     }
     return instance;
 }
 
-DRW_dbg::DRW_dbg()
-    : level(NONE),
-      flags(std::cerr.flags()),
-      prClass(new print_none)
+DRW_dbg::DRW_dbg() :
+    prClass(std::make_unique<print_none>())
 {}
 
-DRW_dbg::~DRW_dbg()
-{
-    delete prClass;
-}
-
 void DRW_dbg::setLevel(LEVEL lvl){
     level = lvl;
-    delete prClass;
     switch (level){
     case DEBUG:
-        prClass = new print_debug;
+        prClass = std::make_unique<print_debug>();
         break;
     default:
-        prClass = new print_none;
+        prClass = std::make_unique<print_none>();
     }
 }
 
@@ -125,10 +117,6 @@ void DRW_dbg::printPT(double x, double y, double z){
     prClass->printPT(x, y, z);
 }
 
-print_debug::print_debug()
-    : flags(std::cerr.flags())
-{}
-
 void print_debug::printS(const std::string &s){
     std::cerr << s;
 }
diff --git a/src/libs/vdxf/libdxfrw/intern/drw_dbg.h b/src/libs/vdxf/libdxfrw/intern/drw_dbg.h
index e04b9c959..7408f695d 100644
--- a/src/libs/vdxf/libdxfrw/intern/drw_dbg.h
+++ b/src/libs/vdxf/libdxfrw/intern/drw_dbg.h
@@ -16,6 +16,7 @@
 #include <string>
 #include <iostream>
 #include <QtGlobal>
+#include <memory>
 //#include <iomanip>
 
 #define DRW_DBGSL(a) DRW_dbg::getInstance()->setLevel(a)
@@ -55,9 +56,9 @@ private:
     DRW_dbg();
     ~DRW_dbg();
     static DRW_dbg *instance;
-    LEVEL level;
-    std::ios_base::fmtflags flags;
-    print_none* prClass;
+    LEVEL level{NONE};
+    std::ios_base::fmtflags flags{std::cerr.flags()};
+    std::unique_ptr<print_none> prClass;
 };
 
 
diff --git a/src/libs/vdxf/libdxfrw/intern/drw_textcodec.cpp b/src/libs/vdxf/libdxfrw/intern/drw_textcodec.cpp
index c381f58c5..6a0bb113e 100644
--- a/src/libs/vdxf/libdxfrw/intern/drw_textcodec.cpp
+++ b/src/libs/vdxf/libdxfrw/intern/drw_textcodec.cpp
@@ -45,22 +45,20 @@ QMap<QString, QStringList> QtCodecs()
 }
 
 DRW_TextCodec::DRW_TextCodec()
-    : version(DRW::AC1021),
-      cp(),
-      conv(nullptr)
+    : version(DRW::AC1021)
 {}
 
 void DRW_TextCodec::setVersion(int v, bool dxfFormat){
     if (v == DRW::AC1009 || v == DRW::AC1006) {
         version = DRW::AC1009;
         cp = "ANSI_1252";
-        setCodePage(&cp, dxfFormat);
+        setCodePage(cp, dxfFormat);
     } else if (v == DRW::AC1012 || v == DRW::AC1014
              || v == DRW::AC1015 || v == DRW::AC1018) {
         version = DRW::AC1015;
 //        if (cp.empty()) { //codepage not set, initialize
             cp = "ANSI_1252";
-            setCodePage(&cp, dxfFormat);
+            setCodePage(cp, dxfFormat);
 //        }
     } else {
         version = DRW::AC1021;
@@ -68,12 +66,11 @@ void DRW_TextCodec::setVersion(int v, bool dxfFormat){
             cp = "UTF-8";//RLZ: can be UCS2 or UTF-16 16bits per char
         else
             cp = "UTF-16";//RLZ: can be UCS2 or UTF-16 16bits per char
-        setCodePage(&cp, dxfFormat);
+        setCodePage(cp, dxfFormat);
     }
 }
 
-void DRW_TextCodec::setVersion(std::string *v, bool dxfFormat){
-    std::string versionStr = *v;
+void DRW_TextCodec::setVersion(const std::string &versionStr, bool dxfFormat){
     if (versionStr == "AC1009" || versionStr == "AC1006") {
         setVersion(DRW::AC1009, dxfFormat);
     } else if (versionStr == "AC1012" || versionStr == "AC1014"
@@ -86,8 +83,8 @@ void DRW_TextCodec::setVersion(std::string *v, bool dxfFormat){
     }
 }
 
-void DRW_TextCodec::setCodePage(const std::string *c, bool dxfFormat){
-    cp = correctCodePage(*c);
+void DRW_TextCodec::setCodePage(const std::string &c, bool dxfFormat){
+    cp = correctCodePage(c);
     if (version < DRW::AC1021)
     {
         if (cp == "UTF-8")
diff --git a/src/libs/vdxf/libdxfrw/intern/drw_textcodec.h b/src/libs/vdxf/libdxfrw/intern/drw_textcodec.h
index d727dc97c..634496c22 100644
--- a/src/libs/vdxf/libdxfrw/intern/drw_textcodec.h
+++ b/src/libs/vdxf/libdxfrw/intern/drw_textcodec.h
@@ -15,10 +15,9 @@ public:
     std::string fromUtf8(const std::string &s);
     std::string toUtf8(const std::string &s);
     int getVersion() const {return version;}
-    void setVersion(std::string *v, bool dxfFormat);
+    void setVersion(const std::string &versionStr, bool dxfFormat);
     void setVersion(int v, bool dxfFormat);
-    void setCodePage(const std::string *c, bool dxfFormat);
-    void setCodePage(const std::string &c, bool dxfFormat){setCodePage(&c, dxfFormat);}
+    void setCodePage(const std::string &c, bool dxfFormat);
     std::string getCodePage() const {return cp;}
 
     static QMap<QString, QStringList> DXFCodePageMap();
@@ -30,8 +29,8 @@ private:
 private:
     Q_DISABLE_COPY(DRW_TextCodec)
     int version;
-    std::string cp;
-    QTextCodec *conv;
+    std::string cp{};
+    QTextCodec *conv{nullptr};
 };
 
 #endif // DRW_TEXTCODEC_H
diff --git a/src/libs/vdxf/libdxfrw/intern/dxfreader.h b/src/libs/vdxf/libdxfrw/intern/dxfreader.h
index e5333c33c..564d5c564 100644
--- a/src/libs/vdxf/libdxfrw/intern/dxfreader.h
+++ b/src/libs/vdxf/libdxfrw/intern/dxfreader.h
@@ -50,8 +50,8 @@ public:
     unsigned long long int getInt64() const {return int64;}
     bool getBool() const { return (intData==0) ? false : true;}
     int getVersion() const {return decoder.getVersion();}
-    void setVersion(std::string *v, bool dxfFormat){decoder.setVersion(v, dxfFormat);}
-    void setCodePage(std::string *c){decoder.setCodePage(c, true);}
+    void setVersion(const std::string &v, bool dxfFormat){decoder.setVersion(v, dxfFormat);}
+    void setCodePage(const std::string &c){decoder.setCodePage(c, true);}
     std::string getCodePage() const { return decoder.getCodePage();}
 
 protected:
diff --git a/src/libs/vdxf/libdxfrw/intern/dxfwriter.h b/src/libs/vdxf/libdxfrw/intern/dxfwriter.h
index 81cb8902d..c36a168aa 100644
--- a/src/libs/vdxf/libdxfrw/intern/dxfwriter.h
+++ b/src/libs/vdxf/libdxfrw/intern/dxfwriter.h
@@ -32,8 +32,8 @@ public:
     virtual bool writeInt64(int code, unsigned long long int data) = 0;
     virtual bool writeDouble(int code, double data) = 0;
     virtual bool writeBool(int code, bool data) = 0;
-    void setVersion(std::string *v, bool dxfFormat){encoder.setVersion(v, dxfFormat);}
-    void setCodePage(std::string *c){encoder.setCodePage(c, true);}
+    void setVersion(const std::string &v, bool dxfFormat){encoder.setVersion(v, dxfFormat);}
+    void setCodePage(const std::string &c){encoder.setCodePage(c, true);}
     std::string getCodePage() const {return encoder.getCodePage();}
 protected:
     std::ofstream *filestr;