/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.
 */
package com.android.voicemail.impl.mail.utility;

import java.io.FilterOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class EOLConvertingOutputStream extends FilterOutputStream {
  int lastChar;

  public EOLConvertingOutputStream(OutputStream out) {
    super(out);
  }

  @Override
  public void write(int oneByte) throws IOException {
    if (oneByte == '\n') {
      if (lastChar != '\r') {
        super.write('\r');
      }
    }
    super.write(oneByte);
    lastChar = oneByte;
  }

  @Override
  public void flush() throws IOException {
    if (lastChar == '\r') {
      super.write('\n');
      lastChar = '\n';
    }
    super.flush();
  }
}