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

   1 //
   2 // Expression.cs: Stores references to items or properties.
   3 //
   4 // Author:
   5 //   Marek Sieradzki (marek.sieradzki@gmail.com)
   6 //
   7 // (C) 2005 Marek Sieradzki
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 #if NET_2_0
  29
  30 using System;
  31 using System.IO;
  32 using System.Collections;
  33 using System.Collections.Generic;
  34 using System.Text;
  35 using System.Text.RegularExpressions;
  36
  37 namespace Microsoft.Build.BuildEngine {
  38         internal class Expression {
  39
  40                 ExpressionCollection expressionCollection;
  41
  42                 public Expression ()
  43                 {
  44                         this.expressionCollection = new ExpressionCollection ();
  45                 }
  46
  47                 public void Parse (string expression)
  48                 {
  49                         expression = expression.Replace ('/', Path.DirectorySeparatorChar);
  50                         expression = expression.Replace ('\\', Path.DirectorySeparatorChar);
  51
  52                         string [] parts = expression.Split (';');
  53
  54                         List <ArrayList> p1 = new List <ArrayList> (parts.Length);
  55                         List <ArrayList> p2 = new List <ArrayList> (parts.Length);
  56                         List <ArrayList> p3 = new List <ArrayList> (parts.Length);
  57
  58                         Prepare (p1, parts.Length);
  59                         Prepare (p2, parts.Length);
  60                         Prepare (p3, parts.Length);
  61
  62                         for (int i = 0; i < parts.Length; i++) {
  63                                 p1 [i] = SplitItems (parts [i]);
  64                         }
  65
  66                         for (int i = 0; i < parts.Length; i++) {
  67                                 p2 [i] = new ArrayList ();
  68                                 foreach (object o in p1 [i]) {
  69                                         if (o is string)
  70                                                 p2 [i].AddRange (SplitProperties ((string) o));
  71                                         else
  72                                                 p2 [i].Add (o);
  73                                 }
  74                         }
  75
  76                         for (int i = 0; i < parts.Length; i++) {
  77                                 p3 [i] = new ArrayList ();
  78                                 foreach (object o in p2 [i]) {
  79                                         if (o is string)
  80                                                 p3 [i].AddRange (SplitMetadata ((string) o));
  81                                         else
  82                                                 p3 [i].Add (o);
  83                                 }
  84                         }
  85
  86                         CopyToExpressionCollection (p3);
  87                 }
  88
  89                 void Prepare (List <ArrayList> l, int length)
  90                 {
  91                         for (int i = 0; i < length; i++)
  92                                 l.Add (null);
  93                 }
  94
  95                 void CopyToExpressionCollection (List <ArrayList> lists)
  96                 {
  97                         for (int i = 0; i < lists.Count; i++) {
  98                                 foreach (object o in lists [i]) {
  99                                         if (o is string)
 100                                                 expressionCollection.Add (Utilities.Unescape ((string) o));
 101                                         else if (o is ItemReference)
 102                                                 expressionCollection.Add ((ItemReference) o);
 103                                         else if (o is PropertyReference)
 104                                                 expressionCollection.Add ((PropertyReference) o);
 105                                         else if (o is MetadataReference)
 106                                                 expressionCollection.Add ((MetadataReference) o);
 107                                 }
 108                                 if (i < lists.Count - 1)
 109                                         expressionCollection.Add (";");
 110                         }
 111                 }
 112
 113                 ArrayList SplitItems (string text)
 114                 {
 115                         ArrayList phase1 = new ArrayList ();
 116                         Match m;
 117                         Regex item = new Regex (
 118                                 @"@\(\s*"
 119                                 + @"(?<itemname>[_A-Za-z][_0-9a-zA-Z]*)"
 120                                 + @"(?<has_transform>\s*->\s*'(?<transform>[^']*)')?"
 121                                 + @"(?<has_separator>\s*,\s*'(?<separator>[^']*)')?"
 122                                 + @"\s*\)");
 123                         m = item.Match (text);
 124
 125                         while (m.Success) {
 126                                 string name = null, transform = null, separator = null;
 127                                 ItemReference ir;
 128
 129                                 name = m.Groups [item.GroupNumberFromName ("itemname")].Value;
 130
 131                                 if (m.Groups [item.GroupNumberFromName ("has_transform")].Success)
 132                                         transform = m.Groups [item.GroupNumberFromName ("transform")].Value;
 133
 134                                 if (m.Groups [item.GroupNumberFromName ("has_separator")].Success)
 135                                         separator = m.Groups [item.GroupNumberFromName ("separator")].Value;
 136
 137                                 ir = new ItemReference (name, transform, separator, m.Groups [0].Index, m.Groups [0].Length);
 138                                 phase1.Add (ir);
 139                                 m = m.NextMatch ();
 140                         }
 141
 142                         ArrayList phase2 = new ArrayList ();
 143                         int last_end = -1;
 144                         int end = text.Length - 1;
 145
 146                         foreach (ItemReference ir in phase1) {
 147                                 int a,b;
 148
 149                                 a = last_end;
 150                                 b = ir.Start;
 151
 152                                 if (b - a - 1 > 0) {
 153                                         phase2.Add (text.Substring (a + 1, b - a - 1));
 154                                 }
 155
 156                                 last_end = ir.End;
 157                                 phase2.Add (ir);
 158                         }
 159
 160                         if (last_end < end)
 161                                 phase2.Add (text.Substring (last_end + 1, end - last_end));
 162
 163                         return phase2;
 164                 }
 165
 166                 ArrayList SplitProperties (string text)
 167                 {
 168                         ArrayList phase1 = new ArrayList ();
 169                         Match m;
 170                         Regex property = new Regex (
 171                                 @"\$\(\s*"
 172                                 + @"(?<name>[_a-zA-Z][_0-9a-zA-Z]*)"
 173                                 + @"\s*\)");
 174                         m = property.Match (text);
 175
 176                         while (m.Success) {
 177                                 string name = null;
 178                                 PropertyReference pr;
 179
 180                                 name = m.Groups [property.GroupNumberFromName ("name")].Value;
 181
 182                                 pr = new PropertyReference (name, m.Groups [0].Index, m.Groups [0].Length);
 183                                 phase1.Add (pr);
 184                                 m = m.NextMatch ();
 185                         }
 186
 187                         ArrayList phase2 = new ArrayList ();
 188                         int last_end = -1;
 189                         int end = text.Length - 1;
 190
 191                         foreach (PropertyReference pr in phase1) {
 192                                 int a,b;
 193
 194                                 a = last_end;
 195                                 b = pr.Start;
 196
 197                                 if (b - a - 1 > 0) {
 198                                         phase2.Add (text.Substring (a + 1, b - a - 1));
 199                                 }
 200
 201                                 last_end = pr.End;
 202                                 phase2.Add (pr);
 203                         }
 204
 205                         if (last_end < end)
 206                                 phase2.Add (text.Substring (last_end + 1, end - last_end));
 207
 208                         return phase2;
 209                 }
 210
 211                 ArrayList SplitMetadata (string text)
 212                 {
 213                         ArrayList phase1 = new ArrayList ();
 214                         Match m;
 215                         Regex metadata = new Regex (
 216                                 @"%\(\s*"
 217                                 + @"((?<name>[_a-zA-Z][_0-9a-zA-Z]*)\.)?"
 218                                 + @"(?<meta>[_a-zA-Z][_0-9a-zA-Z]*)"
 219                                 + @"\s*\)");
 220                         m = metadata.Match (text);
 221
 222                         while (m.Success) {
 223                                 string name = null, meta = null;
 224                                 MetadataReference mr;
 225
 226                                 if (m.Groups [metadata.GroupNumberFromName ("name")].Success)
 227                                         name = m.Groups [metadata.GroupNumberFromName ("name")].Value;
 228
 229                                 meta = m.Groups [metadata.GroupNumberFromName ("meta")].Value;
 230
 231                                 mr = new MetadataReference (name, meta, m.Groups [0].Index, m.Groups [0].Length);
 232                                 phase1.Add (mr);
 233                                 m = m.NextMatch ();
 234                         }
 235
 236                         ArrayList phase2 = new ArrayList ();
 237                         int last_end = -1;
 238                         int end = text.Length - 1;
 239
 240                         foreach (MetadataReference mr in phase1) {
 241                                 int a,b;
 242
 243                                 a = last_end;
 244                                 b = mr.Start;
 245
 246                                 if (b - a - 1> 0) {
 247                                         phase2.Add (text.Substring (a + 1, b - a - 1));
 248                                 }
 249
 250                                 last_end = mr.End;
 251                                 phase2.Add (mr);
 252                         }
 253
 254                         if (last_end < end)
 255                                 phase2.Add (text.Substring (last_end + 1, end - last_end));
 256
 257                         return phase2;
 258                 }
 259
 260                 public object ConvertTo (Project project, Type type)
 261                 {
 262                         return expressionCollection.ConvertTo (project, type);
 263                 }
 264
 265                 public ExpressionCollection Collection {
 266                         get { return expressionCollection; }
 267                 }
 268         }
 269 }
 270
 271 #endif