Ref: add operator==(), operator!=()

src/gui/Font.cc

@@ -30,7 +30,7 @@ namespace jes
         FT_Set_Pixel_Sizes(m_face, 0, size);
 
         GlyphRef x_glyph = load_glyph('x');
-        if (x_glyph.is_null())
+        if (x_glyph == NULL)
         {
             std::cerr << "Could not load 'x' glyph from font" << fname << std::endl;
             return false;

src/gui/FontManager.cc

@@ -15,7 +15,7 @@ namespace jes
         /* Load failsafe font */
         m_mono_font = load_font("FreeMono", 20);
 
-        if (m_mono_font.is_null())
+        if (m_mono_font == NULL)
         {
             std::cerr << "Error loading FreeMono font" << std::endl;
             return false;
@@ -27,7 +27,7 @@ namespace jes
     FontRef FontManager::load_font(const char * fname, size_t size)
     {
         PathRef font_path = Runtime::locate(Runtime::FONT, fname);
-        if (font_path.is_null())
+        if (font_path == NULL)
             return NULL;
 
         FontRef font = new Font();

src/lib/include/jes/FileReader.h

@@ -24,7 +24,7 @@ namespace jes
         bool load(const char * fname);
         unsigned int num_lines()
         {
-            if (m_lines.is_null())
+            if (m_lines == NULL)
             {
                 return 0u;
             }

src/lib/include/jes/Ref.h

@@ -18,6 +18,8 @@ namespace jes
             T & operator*() const { return *m_ptr; }
             T * operator->() const { return m_ptr; }
             bool is_null() const { return m_ptr == NULL; }
+            bool operator==(const T * ptr) { return m_ptr == ptr; }
+            bool operator!=(const T * ptr) { return m_ptr != ptr; }
 
         private:
             void clone_from(const Ref<T> & orig);

src/lib/src/Runtime.cc

@@ -38,7 +38,7 @@ namespace jes
             break;
         }
 
-        if ((!rv.is_null()) && (rv->exists()))
+        if ((rv != NULL) && (rv->exists()))
             return rv;
 
         return NULL;