76 lines
2.4 KiB
Java
76 lines
2.4 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.microblog.library.twitter.util;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.Reader;
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/**
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* CRLFLineReader implements a readLine() method that requires
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* exactly CRLF to terminate an input line.
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* This is required for IMAP, which allows bare CR and LF.
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*
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* @since 3.0
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*/
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public final class CRLFLineReader extends BufferedReader
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{
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private static final char LF = '\n';
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private static final char CR = '\r';
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/**
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* Creates a CRLFLineReader that wraps an existing Reader
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* input source.
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* @param reader The Reader input source.
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*/
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public CRLFLineReader(Reader reader)
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{
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super(reader);
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}
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/**
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* Read a line of text.
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* A line is considered to be terminated by carriage return followed immediately by a linefeed.
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* This contrasts with BufferedReader which also allows other combinations.
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* @since 3.0
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*/
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@Override
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public String readLine() throws IOException {
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StringBuilder sb = new StringBuilder();
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int intch;
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boolean prevWasCR = false;
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//noinspection SynchronizeOnNonFinalField
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synchronized(lock) { // make thread-safe (hopefully!)
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while((intch = read()) != -1)
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{
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if (prevWasCR && intch == LF) {
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return sb.substring(0, sb.length()-1);
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}
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prevWasCR = intch == CR;
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sb.append((char) intch);
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}
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}
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String string = sb.toString();
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if (string.length() == 0) { // immediate EOF
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return null;
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}
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return string;
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}
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} |