1 /* 2 * Copyright 2014, Google Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 package org.jf.util; 33 34 import javax.annotation.Nonnull; 35 import java.util.regex.Matcher; 36 import java.util.regex.Pattern; 37 38 public class TextUtils { 39 private static String newline = System.getProperty("line.separator"); 40 41 @Nonnull normalizeNewlines(@onnull String source)42 public static String normalizeNewlines(@Nonnull String source) { 43 return normalizeNewlines(source, newline); 44 } 45 46 @Nonnull normalizeNewlines(@onnull String source, String newlineValue)47 public static String normalizeNewlines(@Nonnull String source, String newlineValue) { 48 return source.replace("\r", "").replace("\n", newlineValue); 49 } 50 51 @Nonnull normalizeWhitespace(@onnull String source)52 public static String normalizeWhitespace(@Nonnull String source) { 53 // Go to native system new lines so that ^/$ work correctly 54 source = normalizeNewlines(source); 55 56 // Remove all suffix/prefix whitespace 57 Pattern pattern = Pattern.compile("((^[ \t]+)|([ \t]+$))", Pattern.MULTILINE); 58 Matcher matcher = pattern.matcher(source); 59 source = matcher.replaceAll(""); 60 61 // Remove all empty lines 62 Pattern pattern2 = Pattern.compile("^\r?\n?", Pattern.MULTILINE); 63 Matcher matcher2 = pattern2.matcher(source); 64 source = matcher2.replaceAll(""); 65 66 // Remove a trailing new line, if present 67 Pattern pattern3 = Pattern.compile("\r?\n?$"); 68 Matcher matcher3 = pattern3.matcher(source); 69 source = matcher3.replaceAll(""); 70 71 // Go back to unix-style \n newlines 72 source = normalizeNewlines(source, "\n"); 73 return source; 74 } 75 76 @Nonnull stripComments(@onnull String source)77 public static String stripComments(@Nonnull String source) { 78 Pattern pattern = Pattern.compile("#(.*)"); 79 Matcher matcher = pattern.matcher(source); 80 return matcher.replaceAll(""); 81 } 82 } 83