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/* Copyright 2017 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.
==============================================================================*/
#ifndef TENSORFLOW_CONTRIB_LITE_TESTING_UTIL_H_
#define TENSORFLOW_CONTRIB_LITE_TESTING_UTIL_H_

#include <cstdio>

#include "tensorflow/contrib/lite/error_reporter.h"
#include "tensorflow/contrib/lite/string.h"

namespace tflite {

// An ErrorReporter that collects error message in a string, in addition
// to printing to stderr.
class TestErrorReporter : public ErrorReporter {
 public:
  int Report(const char* format, va_list args) override {
    char buffer[1024];
    int size = vsnprintf(buffer, sizeof(buffer), format, args);
    fprintf(stderr, "%s", buffer);
    error_messages_ += buffer;
    num_calls_++;
    return size;
  }

  void Reset() {
    num_calls_ = 0;
    error_messages_.clear();
  }

  int num_calls() const { return num_calls_; }
  const string& error_messages() const { return error_messages_; }

 private:
  int num_calls_ = 0;
  string error_messages_;
};

inline void LogToStderr() {
#ifdef PLATFORM_GOOGLE
  FLAGS_logtostderr = true;
#endif
}

}  // namespace tflite

#endif  // TENSORFLOW_CONTRIB_LITE_TESTING_UTIL_H_