Add new virtual method QPDFObject::getStringValue

Avoid dynamic casting.

libqpdf/QPDFObjectHandle.cc

@@ -639,9 +639,8 @@ QPDFObjectHandle::getValueAsUInt(unsigned int& value)
 std::string
 QPDFObjectHandle::getRealValue()
 {
-    auto real = asReal();
-    if (real) {
-        return real->getVal();
+    if (isReal()) {
+        return obj->getStringValue();
     } else {
         typeWarning("real", "returning 0.0");
         QTC::TC("qpdf", "QPDFObjectHandle real returning 0.0");
@@ -652,11 +651,10 @@ QPDFObjectHandle::getRealValue()
 bool
 QPDFObjectHandle::getValueAsReal(std::string& value)
 {
-    auto real = asReal();
-    if (real == nullptr) {
+    if (!isReal()) {
         return false;
     }
-    value = real->getVal();
+    value = obj->getStringValue();
     return true;
 }
 
@@ -665,9 +663,8 @@ QPDFObjectHandle::getValueAsReal(std::string& value)
 std::string
 QPDFObjectHandle::getName()
 {
-    auto name = asName();
-    if (name) {
-        return name->getName();
+    if (isName()) {
+        return obj->getStringValue();
     } else {
         typeWarning("name", "returning dummy name");
         QTC::TC("qpdf", "QPDFObjectHandle name returning dummy name");
@@ -678,11 +675,10 @@ QPDFObjectHandle::getName()
 bool
 QPDFObjectHandle::getValueAsName(std::string& value)
 {
-    auto name = asName();
-    if (name == nullptr) {
+    if (!isName()) {
         return false;
     }
-    value = name->getName();
+    value = obj->getStringValue();
     return true;
 }
 
@@ -691,9 +687,8 @@ QPDFObjectHandle::getValueAsName(std::string& value)
 std::string
 QPDFObjectHandle::getStringValue()
 {
-    auto str = asString();
-    if (str) {
-        return str->getVal();
+    if (isString()) {
+        return obj->getStringValue();
     } else {
         typeWarning("string", "returning empty string");
         QTC::TC("qpdf", "QPDFObjectHandle string returning empty string");
@@ -704,11 +699,10 @@ QPDFObjectHandle::getStringValue()
 bool
 QPDFObjectHandle::getValueAsString(std::string& value)
 {
-    auto str = asString();
-    if (str == nullptr) {
+    if (!isString()) {
         return false;
     }
-    value = str->getVal();
+    value = obj->getStringValue();
     return true;
 }
 
@@ -741,9 +735,8 @@ QPDFObjectHandle::getValueAsUTF8(std::string& value)
 std::string
 QPDFObjectHandle::getOperatorValue()
 {
-    auto op = asOperator();
-    if (op) {
-        return op->getVal();
+    if (isOperator()) {
+        return obj->getStringValue();
     } else {
         typeWarning("operator", "returning fake value");
         QTC::TC("qpdf", "QPDFObjectHandle operator returning fake value");
@@ -754,20 +747,18 @@ QPDFObjectHandle::getOperatorValue()
 bool
 QPDFObjectHandle::getValueAsOperator(std::string& value)
 {
-    auto op = asOperator();
-    if (op == nullptr) {
+    if (!isOperator()) {
         return false;
     }
-    value = op->getVal();
+    value = obj->getStringValue();
     return true;
 }
 
 std::string
 QPDFObjectHandle::getInlineImageValue()
 {
-    auto image = asInlineImage();
-    if (image) {
-        return image->getVal();
+    if (isInlineImage()) {
+        return obj->getStringValue();
     } else {
         typeWarning("inlineimage", "returning empty data");
         QTC::TC("qpdf", "QPDFObjectHandle inlineimage returning empty data");
@@ -778,11 +769,10 @@ QPDFObjectHandle::getInlineImageValue()
 bool
 QPDFObjectHandle::getValueAsInlineImage(std::string& value)
 {
-    auto image = asInlineImage();
-    if (image == nullptr) {
+    if (!isInlineImage()) {
         return false;
     }
-    value = image->getVal();
+    value = obj->getStringValue();
     return true;
 }
 

libqpdf/QPDF_InlineImage.cc

@@ -29,9 +29,3 @@ QPDF_InlineImage::getJSON(int json_version)
 {
     return JSON::makeNull();
 }
-
-std::string
-QPDF_InlineImage::getVal() const
-{
-    return this->val;
-}

libqpdf/QPDF_Name.cc

@@ -61,9 +61,3 @@ QPDF_Name::getJSON(int json_version)
         return JSON::makeString(this->name);
     }
 }
-
-std::string
-QPDF_Name::getName() const
-{
-    return this->name;
-}

libqpdf/QPDF_Operator.cc

@@ -29,9 +29,3 @@ QPDF_Operator::getJSON(int json_version)
 {
     return JSON::makeNull();
 }
-
-std::string
-QPDF_Operator::getVal() const
-{
-    return this->val;
-}

libqpdf/QPDF_Real.cc

@@ -61,9 +61,3 @@ QPDF_Real::getJSON(int json_version)
     }
     return JSON::makeNumber(result);
 }
-
-std::string
-QPDF_Real::getVal()
-{
-    return this->val;
-}

libqpdf/QPDF_String.cc

@@ -173,12 +173,6 @@ QPDF_String::unparse(bool force_binary)
     return result;
 }
 
-std::string
-QPDF_String::getVal() const
-{
-    return this->val;
-}
-
 std::string
 QPDF_String::getUTF8Val() const
 {

libqpdf/qpdf/QPDFObject_private.hh

@@ -38,7 +38,11 @@ class QPDFObject
     {
         return value->getJSON(json_version);
     }
-
+    std::string
+    getStringValue() const
+    {
+        return value->getStringValue();
+    }
     // Return a unique type code for the object
     qpdf_object_type_e
     getTypeCode() const

libqpdf/qpdf/QPDFValue.hh

@@ -67,6 +67,11 @@ class QPDFValue
     disconnect()
     {
     }
+    virtual std::string
+    getStringValue() const
+    {
+        return "";
+    }
 
   protected:
     QPDFValue() = default;

libqpdf/qpdf/QPDF_InlineImage.hh

@@ -11,7 +11,11 @@ class QPDF_InlineImage: public QPDFValue
     virtual std::shared_ptr<QPDFObject> copy(bool shallow = false);
     virtual std::string unparse();
     virtual JSON getJSON(int json_version);
-    std::string getVal() const;
+    virtual std::string
+    getStringValue() const
+    {
+        return val;
+    }
 
   private:
     QPDF_InlineImage(std::string const& val);

libqpdf/qpdf/QPDF_Name.hh

@@ -11,10 +11,14 @@ class QPDF_Name: public QPDFValue
     virtual std::shared_ptr<QPDFObject> copy(bool shallow = false);
     virtual std::string unparse();
     virtual JSON getJSON(int json_version);
-    std::string getName() const;
 
     // Put # into strings with characters unsuitable for name token
     static std::string normalizeName(std::string const& name);
+    virtual std::string
+    getStringValue() const
+    {
+        return name;
+    }
 
   private:
     QPDF_Name(std::string const& name);

libqpdf/qpdf/QPDF_Operator.hh

@@ -11,7 +11,11 @@ class QPDF_Operator: public QPDFValue
     virtual std::shared_ptr<QPDFObject> copy(bool shallow = false);
     virtual std::string unparse();
     virtual JSON getJSON(int json_version);
-    std::string getVal() const;
+    virtual std::string
+    getStringValue() const
+    {
+        return val;
+    }
 
   private:
     QPDF_Operator(std::string const& val);

libqpdf/qpdf/QPDF_Real.hh

@@ -13,7 +13,11 @@ class QPDF_Real: public QPDFValue
     virtual std::shared_ptr<QPDFObject> copy(bool shallow = false);
     virtual std::string unparse();
     virtual JSON getJSON(int json_version);
-    std::string getVal();
+    virtual std::string
+    getStringValue() const
+    {
+        return val;
+    }
 
   private:
     QPDF_Real(std::string const& val);

libqpdf/qpdf/QPDF_String.hh

@@ -18,8 +18,12 @@ class QPDF_String: public QPDFValue
     virtual std::string unparse();
     std::string unparse(bool force_binary);
     virtual JSON getJSON(int json_version);
-    std::string getVal() const;
     std::string getUTF8Val() const;
+    virtual std::string
+    getStringValue() const
+    {
+        return val;
+    }
 
   private:
     QPDF_String(std::string const& val);