mcs/class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine/Utilities.cs

   1 //
   2 // Utilities.cs:
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //   Lluis Sanchez Gual <lluis@novell.com>
   7 //
   8 // (C) 2005 Marek Sieradzki
   9 // Copyright (c) 2008 Novell, Inc (http://www.novell.com)
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29
  30 #if NET_2_0
  31
  32 using System;
  33 using System.Collections;
  34 using System.IO;
  35 using System.Text;
  36
  37 namespace Microsoft.Build.BuildEngine {
  38         public static class Utilities {
  39
  40                 static Hashtable charsToEscape;
  41
  42                 static Utilities ()
  43                 {
  44                         charsToEscape = new Hashtable ();
  45
  46                         charsToEscape.Add ('$', null);
  47                         charsToEscape.Add ('%', null);
  48                         charsToEscape.Add ('\'', null);
  49                         charsToEscape.Add ('(', null);
  50                         charsToEscape.Add (')', null);
  51                         charsToEscape.Add ('*', null);
  52                         charsToEscape.Add (';', null);
  53                         charsToEscape.Add ('?', null);
  54                         charsToEscape.Add ('@', null);
  55                 }
  56
  57                 public static string Escape (string unescapedExpression)
  58                 {
  59                         StringBuilder sb = new StringBuilder ();
  60
  61                         foreach (char c in unescapedExpression) {
  62                                 if (charsToEscape.Contains (c))
  63                                         sb.AppendFormat ("%{0:x2}", (int) c);
  64                                 else
  65                                         sb.Append (c);
  66                         }
  67
  68                         return sb.ToString ();
  69                 }
  70
  71                 // FIXME: add tests for this
  72                 internal static string Unescape (string escapedExpression)
  73                 {
  74                         StringBuilder sb = new StringBuilder ();
  75
  76                         int i = 0;
  77                         while (i < escapedExpression.Length) {
  78                                 sb.Append (Uri.HexUnescape (escapedExpression, ref i));
  79                         }
  80
  81                         return sb.ToString ();
  82                 }
  83
  84                 internal static string FromMSBuildPath (string relPath)
  85                 {
  86                         if (relPath == null || relPath.Length == 0)
  87                                 return null;
  88
  89                         bool is_windows = Path.DirectorySeparatorChar == '\\';
  90                         string path = relPath;
  91                         if (!is_windows)
  92                                 path = path.Replace ("\\", "/");
  93
  94                         // a path with drive letter is invalid/unusable on non-windows
  95                         if (!is_windows && char.IsLetter (path [0]) && path.Length > 1 && path[1] == ':')
  96                                 return null;
  97
  98                         if (System.IO.File.Exists (path)){
  99                                 return Path.GetFullPath (path);
 100                         }
 101
 102                         if (Path.IsPathRooted (path)) {
 103
 104                                 // Windows paths are case-insensitive. When mapping an absolute path
 105                                 // we can try to find the correct case for the path.
 106
 107                                 string[] names = path.Substring (1).Split ('/');
 108                                 string part = "/";
 109
 110                                 for (int n=0; n<names.Length; n++) {
 111                                         string[] entries;
 112
 113                                         if (names [n] == ".."){
 114                                                 if (part == "/")
 115                                                         return ""; // Can go further back. It's not an existing file
 116                                                 part = Path.GetFullPath (part + "/..");
 117                                                 continue;
 118                                         }
 119
 120                                         entries = Directory.GetFileSystemEntries (part);
 121
 122                                         string fpath = null;
 123                                         foreach (string e in entries) {
 124                                                 if (string.Compare (Path.GetFileName (e), names[n], true) == 0) {
 125                                                         fpath = e;
 126                                                         break;
 127                                                 }
 128                                         }
 129                                         if (fpath == null) {
 130                                                 // Part of the path does not exist. Can't do any more checking.
 131                                                 part = Path.GetFullPath (part);
 132                                                 for (; n < names.Length; n++)
 133                                                         part += "/" + names[n];
 134                                                 return part;
 135                                         }
 136
 137                                         part = fpath;
 138                                 }
 139                                 return Path.GetFullPath (part);
 140                         } else {
 141                                 return Path.GetFullPath (path);
 142                         }
 143                 }
 144         }
 145
 146 }
 147
 148 #endif