https://github.com/hellosiyan/Viewnior/pull/130

Index: src/uni-exiv2.cpp
--- src/uni-exiv2.cpp.orig
+++ src/uni-exiv2.cpp
@@ -22,21 +22,32 @@
 
 #include <exiv2/exiv2.hpp>
 #include <iostream>
+#include <memory>
 
 #include "uni-exiv2.hpp"
 
 #define ARRAY_SIZE(array) (sizeof array/sizeof(array[0]))
 
-static Exiv2::Image::AutoPtr cached_image;
+#ifdef EXIV2_VERSION
+    #ifdef EXIV2_TEST_VERSION
+        #if EXIV2_TEST_VERSION(0,28,0)
+            #define EXIV_ERROR Exiv2::Error
+        #endif
+    #endif
+#else
+    #define EXIV_ERROR Exiv2::AnyError
+#endif
 
+static std::unique_ptr<Exiv2::Image> cached_image;
+
 extern "C"
 void
 uni_read_exiv2_map(const char *uri, void (*callback)(const char*, const char*, void*), void *user_data)
 {
     Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);
     try {
-        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(uri);
-        if ( image.get() == 0 ) {
+        std::unique_ptr<Exiv2::Image> image = Exiv2::ImageFactory::open(uri);
+        if (image == nullptr) {
             return;
         }
 
@@ -80,7 +91,7 @@ uni_read_exiv2_map(const char *uri, void (*callback)(c
                 }
             }
         }
-    } catch (Exiv2::AnyError& e) {
+    } catch (EXIV_ERROR& e) {
         std::cerr << "Exiv2: '" << e << "'\n";
     }
 }
@@ -91,19 +102,19 @@ uni_read_exiv2_to_cache(const char *uri)
 {
     Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);
 
-    if ( cached_image.get() != NULL ) {
+    if (cached_image != nullptr) {
         cached_image->clearMetadata();
-        cached_image.reset(NULL);
+        cached_image.reset(nullptr);
     }
 
     try {
         cached_image = Exiv2::ImageFactory::open(uri);
-        if ( cached_image.get() == 0 ) {
+        if (cached_image == nullptr) {
             return 1;
         }
 
         cached_image->readMetadata();
-    } catch (Exiv2::AnyError& e) {
+    } catch (EXIV_ERROR& e) {
         std::cerr << "Exiv2: '" << e << "'\n";
     }
 
@@ -116,13 +127,13 @@ uni_write_exiv2_from_cache(const char *uri)
 {
     Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);
 
-    if ( cached_image.get() == NULL ) {
+    if (cached_image == nullptr) {
         return 1;
     }
 
     try {
-        Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(uri);
-        if ( image.get() == 0 ) {
+        std::unique_ptr<Exiv2::Image> image = Exiv2::ImageFactory::open(uri);
+        if (image == nullptr) {
             return 2;
         }
 
@@ -130,10 +141,10 @@ uni_write_exiv2_from_cache(const char *uri)
         image->writeMetadata();
 
         cached_image->clearMetadata();
-        cached_image.reset(NULL);
+        cached_image.reset(nullptr);
 
         return 0;
-    } catch (Exiv2::AnyError& e) {
+    } catch (EXIV_ERROR& e) {
         std::cerr << "Exiv2: '" << e << "'\n";
     }