00001 00002 // 00003 // XML storage classes version 1.5 00004 // 00005 // XPath.cs 00006 // 00007 // Copyright (c) 2010 Martin Fuchs <martin-fuchs@gmx.net> 00008 // 00009 00010 00011 /* 00012 00013 All rights reserved. 00014 00015 Redistribution and use in source and binary forms, with or without 00016 modification, are permitted provided that the following conditions are met: 00017 00018 * Redistributions of source code must retain the above copyright 00019 notice, this list of conditions and the following disclaimer. 00020 * Redistributions in binary form must reproduce the above copyright 00021 notice, this list of conditions and the following disclaimer in 00022 the documentation and/or other materials provided with the 00023 distribution. 00024 00025 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00026 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00027 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00028 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00029 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00030 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00031 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00032 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00033 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00034 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00035 POSSIBILITY OF SUCH DAMAGE. 00036 00037 */ 00038 00039 using System.IO; 00040 using System.Collections.Generic; 00041 00042 namespace XMLStorage { 00043 00044 public class XPath : LinkedList<XPathElement> 00045 { 00046 public bool _absolute; 00047 00048 public XPath() 00049 { 00050 _absolute = false; 00051 } 00052 00053 public XPath(string path) 00054 { 00055 _absolute = init(path); 00056 } 00057 00058 private bool init(string path) 00059 { 00060 bool absolute; 00061 int idx = 0; 00062 00063 // Is this an absolute path? 00064 if (path.Length>0 && path[0]=='/') { 00065 absolute = true; 00066 00067 ++idx; 00068 } else 00069 absolute = false; 00070 00071 // parse path 00072 while(idx < path.Length) { 00073 XPathElement elem = new XPathElement(); 00074 00075 idx = elem.parse(path, idx); 00076 00077 if (idx == -1) 00078 break; 00079 00080 AddLast(elem); 00081 00082 if (idx >= path.Length) 00083 break; 00084 00085 if (path[idx] == '/') 00086 ++idx; 00087 } 00088 00089 return absolute; 00090 } 00091 } 00092 00093 } // namespace XMLStorage