bundles/org.simantics.databoard/src/org/simantics/databoard/parser/StringEscapeUtils.java

   1 /*******************************************************************************
   2  *  Copyright (c) 2010 Association for Decentralized Information Management in
   3  *  Industry THTH ry.
   4  *  All rights reserved. This program and the accompanying materials
   5  *  are made available under the terms of the Eclipse Public License v1.0
   6  *  which accompanies this distribution, and is available at
   7  *  http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  *  Contributors:
  10  *      VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.databoard.parser;
  13
  14 public class StringEscapeUtils {
  15
  16         public static String escape(String str) {
  17                 StringBuilder b = new StringBuilder();
  18                 for(int i = 0;i<str.length();++i) {
  19                         char c = str.charAt(i);
  20                         switch(c) {
  21                         case '\n':
  22                                 b.append("\\n");
  23                                 break;
  24                         case '\r':
  25                                 b.append("\\r");
  26                                 break;
  27                         case '\t':
  28                                 b.append("\\t");
  29                                 break;
  30                         case '\b':
  31                                 b.append("\\b");
  32                                 break;
  33                         case '\f':
  34                                 b.append("\\f");
  35                                 break;
  36                         case '\\':
  37                                 b.append("\\\\");
  38                                 break;
  39                         default:
  40                                 b.append(c);
  41                         }
  42                 }
  43                 return b.toString();
  44         }
  45
  46         public static String unescape(String str) {
  47                 StringBuilder b = new StringBuilder();
  48                 for(int i = 0;i<str.length();++i) {
  49                         char c = str.charAt(i);
  50                         if(c == '\\') {
  51                                 c = str.charAt(++i);
  52                                 switch(c) {
  53                                 case 'n':
  54                                         b.append('\n');
  55                                         break;
  56                                 case 'r':
  57                                         b.append('\r');
  58                                         break;
  59                                 case 't':
  60                                         b.append('\t');
  61                                         break;
  62                                 case 'b':
  63                                         b.append('\b');
  64                                         break;
  65                                 case 'f':
  66                                         b.append('\f');
  67                                         break;
  68                                 default:
  69                                         b.append(c);
  70                                 }
  71                         }
  72                         else
  73                                 b.append(c);
  74                 }
  75                 return b.toString();
  76         }
  77
  78 }