001/* 002 * Copyright 2005,2009 Ivan SZKIBA 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ini4j.spi; 017 018public class WinEscapeTool extends EscapeTool 019{ 020 private static final int ANSI_HEX_DIGITS = 2; 021 private static final int ANSI_OCTAL_DIGITS = 3; 022 private static final int OCTAL_RADIX = 8; 023 private static final WinEscapeTool INSTANCE = new WinEscapeTool(); 024 025 public static WinEscapeTool getInstance() 026 { 027 return INSTANCE; 028 } 029 030 @Override void escapeBinary(StringBuilder buff, char c) 031 { 032 buff.append("\\x"); 033 buff.append(HEX[(c >>> HEX_DIGIT_3_OFFSET) & HEX_DIGIT_MASK]); 034 buff.append(HEX[c & HEX_DIGIT_MASK]); 035 } 036 037 @Override int unescapeBinary(StringBuilder buff, char escapeType, String line, int index) 038 { 039 int ret = index; 040 041 if (escapeType == 'x') 042 { 043 try 044 { 045 buff.append((char) Integer.parseInt(line.substring(index, index + ANSI_HEX_DIGITS), HEX_RADIX)); 046 ret = index + ANSI_HEX_DIGITS; 047 } 048 catch (Exception x) 049 { 050 throw new IllegalArgumentException("Malformed \\xHH encoding.", x); 051 } 052 } 053 else if (escapeType == 'o') 054 { 055 try 056 { 057 buff.append((char) Integer.parseInt(line.substring(index, index + ANSI_OCTAL_DIGITS), OCTAL_RADIX)); 058 ret = index + ANSI_OCTAL_DIGITS; 059 } 060 catch (Exception x) 061 { 062 throw new IllegalArgumentException("Malformed \\oOO encoding.", x); 063 } 064 } 065 066 return ret; 067 } 068}