001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.fusesource.hawtbuf.proto.compiler; 018 019 import org.fusesource.hawtbuf.proto.compiler.parser.ParseException; 020 import org.fusesource.hawtbuf.proto.compiler.parser.Token; 021 022 public class ParserSupport { 023 024 public static String decodeString(Token token) throws ParseException { 025 026 // StringBuilder sb = new StringBuilder(); 027 // for (int i = 1; i < value.length() - 1; i++) { 028 // char c = value.charAt(i); 029 // if (c == '\'') { 030 // if( i+1 < (value.length() - 1) ) { 031 // char e = value.charAt(i+1); 032 // switch(e) { 033 // case 'a': 034 // sb.append((char)0x07); 035 // break; 036 // case 'b': 037 // sb.append("\b"); 038 // break; 039 // case 'f': 040 // sb.append("\f"); 041 // break; 042 // case 'n': 043 // sb.append("\n"); 044 // break; 045 // case 'r': 046 // sb.append("\r"); 047 // break; 048 // case 't': 049 // sb.append("\t"); 050 // break; 051 // case 'v': 052 // sb.append((char)0x0b); 053 // break; 054 // case '\\': 055 // sb.append("\\"); 056 // break; 057 // case '\'': 058 // sb.append("'"); 059 // break; 060 // case '\"': 061 // sb.append("\""); 062 // break; 063 // default: 064 // sb.append(e); 065 // break; 066 // } 067 // } else { 068 // throw new RuntimeException("Invalid string litteral: "+value); 069 // } 070 // } 071 // sb.append(c); 072 // } 073 // return sb.toString(); 074 075 try { 076 return TextFormat.unescapeText(token.image.substring(1, token.image.length()-1)); 077 } catch (TextFormat.InvalidEscapeSequence e) { 078 throw new ParseException("Invalid string litteral at line " + token.next.beginLine + ", column " + token.next.beginColumn+": "+e.getMessage()); 079 } 080 } 081 082 }