Smart pointers

1 files changed, 32 insertions, 6 deletions

@@ -9,6 +9,7 @@
 #include <tuple>
 #include <random>
 #include <set>
+#include <memory>
 #include <hkutil/string.h>
 #include <tesseract/baseapi.h>
 #include <leptonica/allheaders.h>
@@ -265,6 +266,32 @@ Magick::Image downloadImage(const std::string& url)
 
 
 
+class tesseract_deleter {
+public:
+
+  void operator()(tesseract::TessBaseAPI* ptr) const
+  {
+    ptr->End();
+  }
+};
+
+using tesseract_ptr =
+  std::unique_ptr<tesseract::TessBaseAPI, tesseract_deleter>;
+
+class pix_deleter {
+public:
+
+  void operator()(Pix* ptr) const
+  {
+    pixDestroy(&ptr);
+  }
+};
+
+using pix_ptr = std::unique_ptr<Pix, pix_deleter>;
+
+
+
+
 
 
 int main(int argc, char** argv)
@@ -418,19 +445,19 @@ int main(int argc, char** argv)
     Magick::Blob titleBlob;
     titleImg.write(&titleBlob);
 
-    Pix* titlePix = pixReadMemTiff(
+    pix_ptr titlePix { pixReadMemTiff(
       reinterpret_cast<const unsigned char*>(titleBlob.data()),
       titleBlob.length(),
-      0);
+      0) };
 
-    tesseract::TessBaseAPI* api = new tesseract::TessBaseAPI();
+    tesseract_ptr api { new tesseract::TessBaseAPI() };
 
     if (api->Init(nullptr, "eng"))
     {
       throw std::runtime_error("Could not initialize tesseract");
     }
 
-    api->SetImage(titlePix);
+    api->SetImage(titlePix.get());
     api->Recognize(nullptr);
 
     tesseract::ResultIterator* ri = api->GetIterator();
@@ -520,8 +547,7 @@ int main(int argc, char** argv)
 
 
 
-    api->End();
-    pixDestroy(&titlePix);
+
 
     if (!firstSlice)
     {