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

   1 //\r
   2 // Commons.Xml.Relaxng.General.cs\r
   3 //\r
   4 // Author:\r
   5 //      Atsushi Enomoto <ginga@kit.hi-ho.ne.jp>\r
   6 //\r
   7 // 2003 Atsushi Enomoto "No rights reserved."\r
   8 //\r
   9 using System;\r
  10 using System.Collections;\r
  11 using System.IO;\r
  12 using System.Xml;\r
  13 using Commons.Xml.Relaxng.Derivative;\r
  14 \r
  15 namespace Commons.Xml.Relaxng\r
  16 {\r
  17         internal class Util\r
  18         {\r
  19                 public static string ResolveUri (string baseUri, string href, XmlResolver resolver)\r
  20                 {\r
  21                         Uri uri = null;\r
  22                         if (baseUri != null && baseUri.Length > 0)
  23                                 uri = new Uri (baseUri);
  24                         Uri result = resolver.ResolveUri (uri, href);
  25                         if (result.Query.Length > 0 || result.Fragment.Length > 0)
  26                                 throw new RelaxngException ("Invalid URI format: " + href);
  27                         return result.ToString ();
  28                 }\r
  29 \r
  30                 public static string NormalizeWhitespace (string s)\r
  31                 {\r
  32                         if (s.Length == 0)\r
  33                                 return s;\r
  34 \r
  35                         char [] ca = s.ToCharArray ();\r
  36                         int j = 0;\r
  37                         for (int i = 0; i < ca.Length; i++) {\r
  38                                 switch (ca [i]) {\r
  39                                 case ' ':\r
  40                                 case '\r':\r
  41                                 case '\t':\r
  42                                 case '\n':\r
  43                                         if (j == 0)\r
  44                                                 break;\r
  45                                         if (ca [j - 1] != ' ')\r
  46                                                 ca [j++] = ' ';\r
  47                                         break;\r
  48                                 default:\r
  49                                         ca [j++] = ca [i];\r
  50                                         break;\r
  51                                 }\r
  52                         }\r
  53                         if (j == 0)\r
  54                                 return String.Empty;\r
  55                         string r = new string (ca, 0, (ca [j - 1] != ' ') ? j : j - 1);\r
  56                         return r;\r
  57                 }\r
  58 \r
  59                 public static bool IsWhitespace (string s)\r
  60                 {\r
  61                         for (int i = 0; i < s.Length; i++) {\r
  62                                 switch (s [i]) {\r
  63                                 case ' ':\r
  64                                 case '\t':\r
  65                                 case '\n':\r
  66                                 case '\r':\r
  67                                         continue;\r
  68                                 default:\r
  69                                         return false;\r
  70                                 }\r
  71                         }\r
  72                         return true;\r
  73                 }\r
  74         }\r
  75 }\r
  76 \r