class/System.Runtime.Serialization/System.Xml/XmlDictionaryReaderQuotas.cs

   1 //
   2 // XmlDictionaryReaderQuotas.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto <atsushi@ximian.com>
   6 //
   7 // Copyright (C) 2005 Novell, Inc.  http://www.novell.com
   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 namespace System.Xml
  30 {
  31         public sealed class XmlDictionaryReaderQuotas
  32         {
  33                 static XmlDictionaryReaderQuotas max;
  34
  35                 static XmlDictionaryReaderQuotas ()
  36                 {
  37                         max = new XmlDictionaryReaderQuotas (true);
  38                 }
  39
  40                 readonly bool is_readonly;
  41                 int array_len, bytes, depth, nt_chars, text_len;
  42
  43                 public XmlDictionaryReaderQuotas ()
  44                         : this (false)
  45                 {
  46                 }
  47
  48                 private XmlDictionaryReaderQuotas (bool max)
  49                 {
  50                         is_readonly = max;
  51                         array_len = max ? int.MaxValue : 0x4000;
  52                         bytes = max ? int.MaxValue : 0x1000;
  53                         depth = max ? int.MaxValue : 0x20;
  54                         nt_chars = max ? int.MaxValue : 0x4000;
  55                         text_len = max ? int.MaxValue : 0x2000;
  56                 }
  57
  58                 public static XmlDictionaryReaderQuotas Max {
  59                         get { return max; }
  60                 }
  61
  62                 public int MaxArrayLength {
  63                         get { return array_len; }
  64                         set { array_len = Check (value); }
  65                 }
  66
  67                 public int MaxBytesPerRead {
  68                         get { return bytes; }
  69                         set { bytes = Check (value); }
  70                 }
  71
  72                 public int MaxDepth {
  73                         get { return depth; }
  74                         set { depth = Check (value); }
  75                 }
  76
  77                 public int MaxNameTableCharCount {
  78                         get { return nt_chars; }
  79                         set { nt_chars = Check (value); }
  80                 }
  81
  82                 public int MaxStringContentLength {
  83                         get { return text_len; }
  84                         set { text_len = Check (value); }
  85                 }
  86
  87                 private int Check (int value)
  88                 {
  89                         if (is_readonly)
  90                                 throw new InvalidOperationException ("This quota is read-only.");
  91                         if (value <= 0)
  92                                 throw new ArgumentException ("Value must be positive integer.");
  93                         return value;
  94                 }
  95
  96                 public void CopyTo (XmlDictionaryReaderQuotas quota)
  97                 {
  98                         quota.array_len = array_len;
  99                         quota.bytes = bytes;
 100                         quota.depth = depth;
 101                         quota.nt_chars = nt_chars;
 102                         quota.text_len = text_len;
 103                 }
 104         }
 105 }
 106 #endif