add various moves

More efficient

Signed-off-by: Rosen Penev <rosenp@gmail.com>

src/bmffimage.cpp

@@ -669,7 +669,7 @@ void BmffImage::parseCr3Preview(const DataBuf& data, std::ostream& out, bool bTr
       return "image/jpeg";
     return "application/octet-stream";
   }();
-  nativePreviews_.push_back(nativePreview);
+  nativePreviews_.push_back(std::move(nativePreview));
 
   if (bTrace) {
     out << Internal::stringFormat("width,height,size = %zu,%zu,%zu", nativePreview.width_, nativePreview.height_,

src/epsimage.cpp

@@ -755,7 +755,7 @@ void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList
         EXV_WARNING << "Unable to handle Illustrator thumbnail data type: " << type << "\n";
 #endif
       } else {
-        nativePreviews.push_back(nativePreview);
+        nativePreviews.push_back(std::move(nativePreview));
       }
     }
     if (posEndPhotoshop != posEndEps) {
@@ -766,7 +766,7 @@ void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList
       nativePreview.height_ = 0;
       nativePreview.filter_ = "hex-irb";
       nativePreview.mimeType_ = "image/jpeg";
-      nativePreviews.push_back(nativePreview);
+      nativePreviews.push_back(std::move(nativePreview));
     }
     if (sizeWmf != 0) {
       NativePreview nativePreview;
@@ -776,7 +776,7 @@ void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList
       nativePreview.height_ = 0;
       nativePreview.filter_ = "";
       nativePreview.mimeType_ = "image/x-wmf";
-      nativePreviews.push_back(nativePreview);
+      nativePreviews.push_back(std::move(nativePreview));
     }
     if (sizeTiff != 0) {
       NativePreview nativePreview;
@@ -786,7 +786,7 @@ void readWriteEpsMetadata(BasicIo& io, std::string& xmpPacket, NativePreviewList
       nativePreview.height_ = 0;
       nativePreview.filter_ = "";
       nativePreview.mimeType_ = "image/tiff";
-      nativePreviews.push_back(nativePreview);
+      nativePreviews.push_back(std::move(nativePreview));
     }
   } else {
     // check for Adobe Illustrator 8.0 or older

src/preview.cpp

@@ -1025,7 +1025,7 @@ PreviewPropertiesList PreviewManager::getPreviewProperties() const {
       PreviewProperties props = loader->getProperties();
       DataBuf buf = loader->getData();  // #16 getPreviewImage()
       props.size_ = buf.size();         //     update the size
-      list.push_back(props);
+      list.push_back(std::move(props));
     }
   }
   std::sort(list.begin(), list.end(), cmpPreviewProperties);

src/psdimage.cpp

@@ -296,7 +296,7 @@ void PsdImage::readResourceBlock(uint16_t resourceId, uint32_t resourceSize) {
         if (format == 1) {
           nativePreview.filter_ = "";
           nativePreview.mimeType_ = "image/jpeg";
-          nativePreviews_.push_back(nativePreview);
+          nativePreviews_.push_back(std::move(nativePreview));
         } else {
           // unsupported format of native preview
         }