--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/name/blackcap/exifwasher/exiv2/native.cpp	Tue Mar 31 13:24:48 2020 -0700
@@ -0,0 +1,167 @@
+#include <jni.h>
+#include <exiv2/exiv2.hpp>
+#include <iostream>
+#include <iomanip>
+#include <cassert>
+
+/* Functions for class name_blackcap_exifwasher_exiv2_Image */
+
+#ifndef _Included_name_blackcap_exifwasher_exiv2_Image
+#define _Included_name_blackcap_exifwasher_exiv2_Image
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Utility function to get pointer field.
+ */
+jlong getPointer(JNIEnv *jEnv, jobject jThis) {
+    return jEnv->GetLongField(jThis, jEnv->GetFieldID(jEnv->GetObjectClass(jThis), "pointer", "J"));
+}
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_Image
+ * Method:    _ctor
+ * Signature: (Ljava/lang/String;)J
+ */
+JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1ctor
+  (JNIEnv *jEnv, jobject jThis, jstring path) {
+      const char *cPath = jEnv->GetStringUTFChars(path, NULL);
+      jlong ret = 0;
+      try {
+          ret = reinterpret_cast<jlong> (Exiv2::ImageFactory::open(cPath).release());
+      } catch (...) {
+          jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
+          const char *pfx = "unable to open ";
+          char *message = (char *) malloc(strlen(cPath) + strlen(pfx) + 1);
+          strcpy(message, pfx);
+          strcat(message, cPath);
+          jEnv->ThrowNew(ex, message);
+          free(message);
+      }
+      jEnv->ReleaseStringUTFChars(path, cPath);
+      return ret;
+  }
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_Image
+ * Method:    _writeMetadata
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1writeMetadata
+  (JNIEnv *jEnv, jobject jThis) {
+      Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
+      try {
+          image->writeMetadata();
+      } catch (...) {
+          jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
+          jEnv->ThrowNew(ex, "unable to write metadata");
+      }
+  }
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_Image
+ * Method:    _getMetadata
+ * Signature: ()J
+ */
+JNIEXPORT jlong JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1getMetadata
+  (JNIEnv *jEnv, jobject jThis) {
+      Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
+      try {
+          image->readMetadata();
+      } catch (...) {
+          jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
+          jEnv->ThrowNew(ex, "unable to read metadata");
+      }
+      return reinterpret_cast<jlong> (&(image->exifData()));
+  }
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_Image
+ * Method:    _dtor
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_Image__1dtor
+  (JNIEnv *jEnv, jobject jThis) {
+      Exiv2::Image *image = reinterpret_cast<Exiv2::Image *> (getPointer(jEnv, jThis));
+      delete image;
+  }
+
+#ifdef __cplusplus
+}
+#endif
+#endif
+/* Header for class name_blackcap_exifwasher_exiv2_ExifData */
+
+#ifndef _Included_name_blackcap_exifwasher_exiv2_ExifData
+#define _Included_name_blackcap_exifwasher_exiv2_ExifData
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_ExifData
+ * Method:    _erase
+ * Signature: (Ljava/lang/String;)V
+ */
+JNIEXPORT void JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1erase
+  (JNIEnv *jEnv, jobject jThis, jstring key) {
+      Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
+      const char *cKey = jEnv->GetStringUTFChars(key, NULL);
+      Exiv2::ExifData::iterator found = data->findKey(Exiv2::ExifKey(std::string(cKey)));
+      try {
+          data->erase(found);
+      } catch (...) {
+          jclass ex = jEnv->FindClass("name/blackcap/exifwasher/exiv2/Exiv2Exception");
+          const char *pfx = "unable to delete ";
+          char *message = (char *) malloc(strlen(cKey) + strlen(pfx) + 1);
+          strcpy(message, pfx);
+          strcat(message, cKey);
+          jEnv->ThrowNew(ex, message);
+          free(message);
+      }
+      jEnv->ReleaseStringUTFChars(key, cKey);
+  }
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_ExifData
+ * Method:    _value
+ * Signature: (Ljava/lang/String;)Lname/blackcap/exifwasher/exiv2/ExifData/Value;
+ */
+JNIEXPORT jobject JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1value
+  (JNIEnv *jEnv, jobject jThis, jstring key) {
+      Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
+      const char *cKey = jEnv->GetStringUTFChars(key, NULL);
+      Exiv2::ExifData::const_iterator found = data->findKey(Exiv2::ExifKey(std::string(cKey)));
+      jEnv->ReleaseStringUTFChars(key, cKey);
+      if (found == data->end()) {
+          return NULL;
+      }
+      jclass klass = jEnv->FindClass("name/blackcap/exifwasher/exiv2/ExifData$Value");
+      jstring type = jEnv->NewStringUTF(found->typeName());
+      jstring value = jEnv->NewStringUTF(found->toString().c_str());
+      jmethodID method = jEnv->GetMethodID(klass, "<init>", "(Ljava/lang/String;Ljava/lang/String;)V");
+      return jEnv->NewObject(klass, method, type, value);
+  }
+
+/*
+ * Class:     name_blackcap_exifwasher_exiv2_ExifData
+ * Method:    _keys
+ * Signature: ()[Ljava/lang/String;
+ */
+JNIEXPORT jobjectArray JNICALL Java_name_blackcap_exifwasher_exiv2_ExifData__1keys
+  (JNIEnv *jEnv, jobject jThis) {
+      Exiv2::ExifData *data = reinterpret_cast<Exiv2::ExifData *> (getPointer(jEnv, jThis));
+      jclass klass = jEnv->FindClass("java/lang/String");
+      jobjectArray ret = jEnv->NewObjectArray(data->count(), klass, NULL);
+      Exiv2::ExifData::const_iterator end = data->end();
+      jsize j = 0;
+      for (Exiv2::ExifData::const_iterator i = data->begin(); i != end; ++i) {
+          jEnv->SetObjectArrayElement(ret, j++, jEnv->NewStringUTF(i->key().c_str()));
+      }
+      return ret;
+  }
+
+#ifdef __cplusplus
+}
+#endif
+#endif