| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 |
| * |
| * https://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 org.apache.tools.ant.util; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| |
| import org.apache.tools.ant.ProjectComponent; |
| |
| /** |
| * class to tokenize the input as lines separated |
| * by \r (mac style), \r\n (dos/windows style) or \n (unix style) |
| * @since Ant 1.6 |
| */ |
| public class LineTokenizer extends ProjectComponent |
| implements Tokenizer { |
| private static final int NOT_A_CHAR = -2; |
| private String lineEnd = ""; |
| private int pushed = NOT_A_CHAR; |
| private boolean includeDelims = false; |
| |
| /** |
| * attribute includedelims - whether to include |
| * the line ending with the line, or to return |
| * it in the posttoken |
| * default false |
| * @param includeDelims if true include /r and /n in the line |
| */ |
| |
| public void setIncludeDelims(boolean includeDelims) { |
| this.includeDelims = includeDelims; |
| } |
| |
| /** |
| * get the next line from the input |
| * |
| * @param in the input reader |
| * @return the line excluding /r or /n, unless includedelims is set |
| * @exception IOException if an error occurs reading |
| */ |
| public String getToken(Reader in) throws IOException { |
| int ch; |
| if (pushed == NOT_A_CHAR) { |
| ch = in.read(); |
| } else { |
| ch = pushed; |
| pushed = NOT_A_CHAR; |
| } |
| if (ch == -1) { |
| return null; |
| } |
| |
| lineEnd = ""; |
| StringBuilder line = new StringBuilder(); |
| |
| int state = 0; |
| while (ch != -1) { |
| if (state == 0) { |
| if (ch == '\r') { |
| state = 1; |
| } else if (ch == '\n') { |
| lineEnd = "\n"; |
| break; |
| } else { |
| line.append((char) ch); |
| } |
| } else { |
| state = 0; |
| if (ch == '\n') { |
| lineEnd = "\r\n"; |
| } else { |
| pushed = ch; |
| lineEnd = "\r"; |
| } |
| break; |
| } |
| ch = in.read(); |
| } |
| if (ch == -1 && state == 1) { |
| lineEnd = "\r"; |
| } |
| |
| if (includeDelims) { |
| line.append(lineEnd); |
| } |
| return line.toString(); |
| } |
| |
| /** |
| * @return the line ending character(s) for the current line |
| */ |
| @Override |
| public String getPostToken() { |
| return includeDelims ? "" : lineEnd; |
| } |
| |
| } |
| |