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      1 /*
      2  * Copyright (C) 2015 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.phone.common.mail.utility;
     17 
     18 import java.io.FilterOutputStream;
     19 import java.io.IOException;
     20 import java.io.OutputStream;
     21 
     22 public class EOLConvertingOutputStream extends FilterOutputStream {
     23     int lastChar;
     24 
     25     public EOLConvertingOutputStream(OutputStream out) {
     26         super(out);
     27     }
     28 
     29     @Override
     30     public void write(int oneByte) throws IOException {
     31         if (oneByte == '\n') {
     32             if (lastChar != '\r') {
     33                 super.write('\r');
     34             }
     35         }
     36         super.write(oneByte);
     37         lastChar = oneByte;
     38     }
     39 
     40     @Override
     41     public void flush() throws IOException {
     42         if (lastChar == '\r') {
     43             super.write('\n');
     44             lastChar = '\n';
     45         }
     46         super.flush();
     47     }
     48 }