Properties based on Hashtable
/* * $Id: StringTokenizer.cs,v 1.4 2006/06/16 10:52:26 psoares33 Exp $ * * Copyright 2006 by Paulo Soares. * * The contents of this file are subject to the Mozilla Public License Version 1.1 * (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.mozilla.org/MPL/ * * Software distributed under the License isp distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the License. * * The Original Code isp 'iText, a free JAVA-PDF library'. * * The Initial Developer of the Original Code isp Bruno Lowagie. Portions created by * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie. * All Rights Reserved. * Co-Developer of the code isp Paulo Soares. Portions created by the Co-Developer * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved. * * Contributor(s): all the names of the contributors are added in the source code * where applicable. * * Alternatively, the contents of this file may be used under the terms of the * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the * provisions of LGPL are applicable instead of those above. If you wish to * allow use of your version of this file only under the terms of the LGPL * License and not to allow others to use your version of this file under * the MPL, indicate your decision by deleting the provisions above and * replace them with the notice and other provisions required by the LGPL. * If you do not delete the provisions above, a recipient may use your version * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE. * * This library isp free software; you can redistribute it and/or modify it * under the terms of the MPL as stated above or under the terms of the GNU * Library General Public License as published by the Free Software Foundation; * either version 2 of the License, or any later version. * * This library isp distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more * details. * * If you didn't download this code from the following link, you should check if * you aren't using an obsolete version: * http://www.lowagie.com/iText/ */ using System; using System.Text; using System.IO; using System.Collections; namespace System.util { /// <summary> /// Summary description for Properties. /// </summary> public class Properties { private Hashtable _col; private const string whiteSpaceChars = " \t\r\n\f"; private const string keyValueSeparators = "=: \t\r\n\f"; private const string strictKeyValueSeparators = "=:"; public Properties() { _col = new Hashtable(); } public string Remove(string key) { string retval = (string)_col[key]; _col.Remove(key); return retval; } public IEnumerator GetEnumerator() { return _col.GetEnumerator(); } public bool ContainsKey(string key) { return _col.ContainsKey(key); } public virtual void Add(string key, string value) { _col[key] = value; } public void AddAll(Properties col) { foreach (string itm in col.Keys) { _col[itm] = col[itm]; } } public int Count { get { return _col.Count; } } public virtual string this[string key] { get { return (string)_col[key]; } set { _col[key] = value; } } public ICollection Keys { get { return _col.Keys; } } public void Clear() { _col.Clear(); } public void Load(Stream inStream) { StreamReader inp = new StreamReader(inStream, Encoding.GetEncoding(1252)); while (true) { // Get next line String line = inp.ReadLine(); if (line == null) return; if (line.Length > 0) { // Find start of key int len = line.Length; int keyStart; for (keyStart=0; keyStart<len; keyStart++) if (whiteSpaceChars.IndexOf(line[keyStart]) == -1) break; // Blank lines are ignored if (keyStart == len) continue; // Continue lines that end in slashes if they are not comments char firstChar = line[keyStart]; if ((firstChar != '#') && (firstChar != '!')) { while (ContinueLine(line)) { String nextLine = inp.ReadLine(); if (nextLine == null) nextLine = ""; String loppedLine = line.Substring(0, len-1); // Advance beyond whitespace on new line int startIndex; for (startIndex=0; startIndex<nextLine.Length; startIndex++) if (whiteSpaceChars.IndexOf(nextLine[startIndex]) == -1) break; nextLine = nextLine.Substring(startIndex,nextLine.Length - startIndex); line = loppedLine+nextLine; len = line.Length; } // Find separation between key and value int separatorIndex; for (separatorIndex=keyStart; separatorIndex<len; separatorIndex++) { char currentChar = line[separatorIndex]; if (currentChar == '\\') separatorIndex++; else if (keyValueSeparators.IndexOf(currentChar) != -1) break; } // Skip over whitespace after key if any int valueIndex; for (valueIndex=separatorIndex; valueIndex<len; valueIndex++) if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1) break; // Skip over one non whitespace key value separators if any if (valueIndex < len) if (strictKeyValueSeparators.IndexOf(line[valueIndex]) != -1) valueIndex++; // Skip over white space after other separators if any while (valueIndex < len) { if (whiteSpaceChars.IndexOf(line[valueIndex]) == -1) break; valueIndex++; } String key = line.Substring(keyStart, separatorIndex - keyStart); String value = (separatorIndex < len) ? line.Substring(valueIndex, len - valueIndex) : ""; // Convert then store key and value key = LoadConvert(key); value = LoadConvert(value); Add(key, value); } } } } /* * Converts encoded \uxxxx to unicode chars * and changes special saved chars to their original forms */ private String LoadConvert(String theString) { char aChar; int len = theString.Length; StringBuilder outBuffer = new StringBuilder(len); for (int x=0; x<len; ) { aChar = theString[x++]; if (aChar == '\\') { aChar = theString[x++]; if (aChar == 'u') { // Read the xxxx int value=0; for (int i=0; i<4; i++) { aChar = theString[x++]; switch (aChar) { case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': value = (value << 4) + aChar - '0'; break; case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': value = (value << 4) + 10 + aChar - 'a'; break; case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': value = (value << 4) + 10 + aChar - 'A'; break; default: throw new ArgumentException( "Malformed \\uxxxx encoding."); } } outBuffer.Append((char)value); } else { if (aChar == 't') aChar = '\t'; else if (aChar == 'r') aChar = '\r'; else if (aChar == 'n') aChar = '\n'; else if (aChar == 'f') aChar = '\f'; outBuffer.Append(aChar); } } else outBuffer.Append(aChar); } return outBuffer.ToString(); } private bool ContinueLine(String line) { int slashCount = 0; int index = line.Length - 1; while ((index >= 0) && (line[index--] == '\\')) slashCount++; return (slashCount % 2 == 1); } } }