- /*
- * Copyright 2003-2004 The Apache Software Foundation
- *
- * 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 org.apache.tools.ant.util;
-
- import java.io.Reader;
- import java.io.IOException;
-
- import org.apache.tools.ant.ProjectComponent;
-
- /**
- * class to tokenize the input as lines seperated
- * 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 String lineEnd = "";
- private int pushed = -2;
- 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 = -1;
- if (pushed != -2) {
- ch = pushed;
- pushed = -2;
- } else {
- ch = in.read();
- }
- if (ch == -1) {
- return null;
- }
-
- lineEnd = "";
- StringBuffer line = new StringBuffer();
-
- 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
- */
- public String getPostToken() {
- if (includeDelims) {
- return "";
- }
- return lineEnd;
- }
-
- }
-