Rename fuzz target

fuzz/fuzz-read-print-write.cpp

@@ -0,0 +1,29 @@
+#include <exiv2/exiv2.hpp>
+
+#include <iostream>
+#include <iomanip>
+#include <cassert>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t * Data, size_t Size) {
+  // Invalid files generate a lot of warnings, so switch off logging.
+  Exiv2::LogMsg::setLevel(Exiv2::LogMsg::mute);
+
+  Exiv2::XmpParser::initialize();
+  ::atexit(Exiv2::XmpParser::terminate);
+
+  try {
+    Exiv2::Image::UniquePtr image = Exiv2::ImageFactory::open(Data, Size);
+    assert(image.get() != 0);
+
+    image->readMetadata();
+
+    Exiv2::ExifData &exifData = image->exifData();
+    if (exifData.empty()) {
+      return -1;
+    }
+  } catch(...) {
+    // Exiv2 throws an exception if the metadata is invalid.
+  }
+
+  return 0;
+}