chore: import upstream snapshot with attribution

tensorflow/lite/tools/benchmark/android/jni/benchmark_model_jni.cc

@@ -0,0 +1,66 @@
+/* Copyright 2018 The TensorFlow Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+#include <jni.h>
+
+#include <sstream>
+#include <string>
+
+#include "tensorflow/lite/tools/benchmark/benchmark_tflite_model.h"
+
+#ifdef __ANDROID__
+#include <android/log.h>
+#endif
+
+namespace tflite {
+namespace benchmark {
+namespace {
+
+void Run(int argc, char** argv) {
+  BenchmarkTfLiteModel benchmark;
+  benchmark.Run(argc, argv);
+}
+
+}  // namespace
+}  // namespace benchmark
+}  // namespace tflite
+
+extern "C" {
+
+JNIEXPORT void JNICALL
+Java_org_tensorflow_lite_benchmark_BenchmarkModel_nativeRun(JNIEnv* env,
+                                                            jclass clazz,
+                                                            jstring args_obj) {
+  const char* args_chars = env->GetStringUTFChars(args_obj, nullptr);
+
+  // Split the args string into individual arg tokens.
+  std::istringstream iss(args_chars);
+  std::vector<std::string> args_split{std::istream_iterator<std::string>(iss),
+                                      {}};
+
+  // Construct a fake argv command-line object for the benchmark.
+  std::vector<char*> argv;
+  std::string arg0 = "(BenchmarkModelAndroid)";
+  argv.push_back(const_cast<char*>(arg0.data()));
+  for (auto& arg : args_split) {
+    argv.push_back(const_cast<char*>(arg.data()));
+  }
+
+  tflite::benchmark::Run(static_cast<int>(argv.size()), argv.data());
+
+  env->ReleaseStringUTFChars(args_obj, args_chars);
+}
+
+}  // extern "C"