114 lines
3.7 KiB
C#
114 lines
3.7 KiB
C#
//------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------
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namespace System.IdentityModel
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{
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using System.Xml;
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struct XmlAttributeHolder
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{
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string prefix;
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string ns;
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string localName;
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string value;
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public static XmlAttributeHolder[] emptyArray = new XmlAttributeHolder[0];
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public XmlAttributeHolder(string prefix, string localName, string ns, string value)
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{
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this.prefix = prefix;
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this.localName = localName;
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this.ns = ns;
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this.value = value;
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}
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public string Prefix
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{
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get { return prefix; }
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}
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public string NamespaceUri
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{
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get { return ns; }
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}
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public string LocalName
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{
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get { return localName; }
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}
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public string Value
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{
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get { return value; }
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}
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public void WriteTo(XmlWriter writer)
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{
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writer.WriteStartAttribute(prefix, localName, ns);
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writer.WriteString(value);
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writer.WriteEndAttribute();
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}
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public static void WriteAttributes(XmlAttributeHolder[] attributes, XmlWriter writer)
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{
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for (int i = 0; i < attributes.Length; i++)
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attributes[i].WriteTo(writer);
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}
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public static XmlAttributeHolder[] ReadAttributes(XmlDictionaryReader reader)
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{
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int maxSizeOfHeaders = int.MaxValue;
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return ReadAttributes(reader, ref maxSizeOfHeaders);
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}
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public static XmlAttributeHolder[] ReadAttributes(XmlDictionaryReader reader, ref int maxSizeOfHeaders)
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{
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if (reader.AttributeCount == 0)
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return emptyArray;
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XmlAttributeHolder[] attributes = new XmlAttributeHolder[reader.AttributeCount];
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reader.MoveToFirstAttribute();
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for (int i = 0; i < attributes.Length; i++)
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{
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string ns = reader.NamespaceURI;
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string localName = reader.LocalName;
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string prefix = reader.Prefix;
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string value = string.Empty;
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while (reader.ReadAttributeValue())
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{
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if (value.Length == 0)
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value = reader.Value;
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else
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value += reader.Value;
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}
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Deduct(prefix, ref maxSizeOfHeaders);
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Deduct(localName, ref maxSizeOfHeaders);
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Deduct(ns, ref maxSizeOfHeaders);
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Deduct(value, ref maxSizeOfHeaders);
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attributes[i] = new XmlAttributeHolder(prefix, localName, ns, value);
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reader.MoveToNextAttribute();
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}
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reader.MoveToElement();
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return attributes;
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}
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static void Deduct(string s, ref int maxSizeOfHeaders)
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{
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int byteCount = s.Length * sizeof(char);
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if (byteCount > maxSizeOfHeaders)
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{
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throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.XmlBufferQuotaExceeded)));
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}
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maxSizeOfHeaders -= byteCount;
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}
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public static string GetAttribute(XmlAttributeHolder[] attributes, string localName, string ns)
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{
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for (int i = 0; i < attributes.Length; i++)
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if (attributes[i].LocalName == localName && attributes[i].NamespaceUri == ns)
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return attributes[i].Value;
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return null;
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}
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}
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}
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