1/*
2 * Copyright (C) 2008 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
17package com.android.email.mail.transport;
18
19import java.io.FilterOutputStream;
20import java.io.IOException;
21import java.io.OutputStream;
22
23public class EOLConvertingOutputStream extends FilterOutputStream {
24    int lastChar;
25
26    public EOLConvertingOutputStream(OutputStream out) {
27        super(out);
28    }
29
30    @Override
31    public void write(int oneByte) throws IOException {
32        if (oneByte == '\n') {
33            if (lastChar != '\r') {
34                super.write('\r');
35            }
36        }
37        super.write(oneByte);
38        lastChar = oneByte;
39    }
40
41    @Override
42    public void flush() throws IOException {
43        if (lastChar == '\r') {
44            super.write('\n');
45            lastChar = '\n';
46        }
47        super.flush();
48    }
49}
50