class/Commons.Xml.Relaxng/Commons.Xml.Relaxng/Misc.cs

   1 //
   2 // Commons.Xml.Relaxng.General.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>
   6 //
   7 // 2003 Atsushi Enomoto "No rights reserved."
   8 //
   9 // Copyright (c) 2004 Novell Inc.
  10 // All rights reserved
  11 //
  12
  13 //
  14 // Permission is hereby granted, free of charge, to any person obtaining
  15 // a copy of this software and associated documentation files (the
  16 // "Software"), to deal in the Software without restriction, including
  17 // without limitation the rights to use, copy, modify, merge, publish,
  18 // distribute, sublicense, and/or sell copies of the Software, and to
  19 // permit persons to whom the Software is furnished to do so, subject to
  20 // the following conditions:
  21 //
  22 // The above copyright notice and this permission notice shall be
  23 // included in all copies or substantial portions of the Software.
  24 //
  25 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  28 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  29 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32 //
  33 using System;
  34 using System.Collections;
  35 using System.IO;
  36 using System.Text;
  37 using System.Xml;
  38 using Commons.Xml.Relaxng.Derivative;
  39
  40 namespace Commons.Xml.Relaxng
  41 {
  42         internal class Util
  43         {
  44                 public static string NormalizeWhitespace (string s)
  45                 {
  46                         if (s.Length == 0)
  47                                 return s;
  48
  49                         StringBuilder sb = null;
  50                         int noSpaceIndex = 0;
  51                         bool inSpace = false;
  52
  53                         for (int i = 0; i < s.Length; i++) {
  54                                 switch (s [i]) {
  55                                 case ' ':
  56                                 case '\r':
  57                                 case '\t':
  58                                 case '\n':
  59                                         if (inSpace)
  60                                                 continue;
  61                                         if (sb == null)
  62                                                 sb = new StringBuilder (s.Length);
  63                                         if (noSpaceIndex < i) {
  64                                                 if (sb.Length > 0)
  65                                                         sb.Append (' ');
  66                                                 sb.Append (s, noSpaceIndex, i - noSpaceIndex);
  67                                         }
  68                                         inSpace = true;
  69                                         break;
  70                                 default:
  71                                         if (inSpace) {
  72                                                 noSpaceIndex = i;
  73                                                 inSpace = false;
  74                                         }
  75                                         break;
  76                                 }
  77                         }
  78                         if (sb == null)
  79                                 return s;
  80                         if (!inSpace && noSpaceIndex < s.Length) {
  81                                 sb.Append (' ');
  82                                 sb.Append (s, noSpaceIndex, s.Length - noSpaceIndex);
  83                         }
  84                         return sb.ToString ();
  85                 }
  86
  87                 public static bool IsWhitespace (string s)
  88                 {
  89                         for (int i = 0; i < s.Length; i++) {
  90                                 switch (s [i]) {
  91                                 case ' ':
  92                                 case '\t':
  93                                 case '\n':
  94                                 case '\r':
  95                                         continue;
  96                                 default:
  97                                         return false;
  98                                 }
  99                         }
 100                         return true;
 101                 }
 102         }
 103 }
 104