XmlUtil.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / IdentityModel / System / IdentityModel / XmlUtil.cs / 1305376 / XmlUtil.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------
namespace System.IdentityModel
{ 
    using System.Xml;
    using System.Diagnostics; 
 
    static class XmlUtil
    { 
        public const string XmlNs = "http://www.w3.org/XML/1998/namespace";
        public const string XmlNsNs = "http://www.w3.org/2000/xmlns/";

        //public static string GetXmlLangAttribute(XmlReader reader) 
        //{
        //    string xmlLang = null; 
        //    if (reader.MoveToAttribute("lang", XmlNs)) 
        //    {
        //        xmlLang = reader.Value; 
        //        reader.MoveToElement();
        //    }

        //    if (xmlLang == null) 
        //        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.XmlLangAttributeMissing)));
 
        //    return xmlLang; 
        //}
 
        //public static void ReadContentAsQName(XmlReader reader, out string localName, out string ns)
        //{
        //    ParseQName(reader, reader.ReadContentAsString(), out localName, out ns);
        //} 

        public static bool IsWhitespace(char ch) 
        { 
            return (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n');
        } 

        public static string TrimEnd(string s)
        {
            int i; 
            for (i = s.Length; i > 0 && IsWhitespace(s[i - 1]); i--)
                ; 
 
            if (i != s.Length)
            { 
                return s.Substring(0, i);
            }

            return s; 
        }
 
        public static string TrimStart(string s) 
        {
            int i; 
            for (i = 0; i < s.Length && IsWhitespace(s[i]); i++)
                ;

            if (i != 0) 
            {
                return s.Substring(i); 
            } 

            return s; 
        }

        public static string Trim(string s)
        { 
            int i;
            for (i = 0; i < s.Length && IsWhitespace(s[i]); i++); 
            if (i >= s.Length) 
            {
                return string.Empty; 
            }

            int j;
            for (j = s.Length; j > 0 && IsWhitespace(s[j - 1]); j--); 
            DiagnosticUtility.DebugAssert(j > i, "Logic error in XmlUtil.Trim().");
 
            if (i != 0 || j != s.Length) 
            {
                return s.Substring(i, j - i); 
            }
            return s;
        }
 
        //public static void ParseQName(XmlReader reader, string qname, out string localName, out string ns)
        //{ 
        //    int index = qname.IndexOf(':'); 
        //    string prefix;
        //    if (index < 0) 
        //    {
        //        prefix = "";
        //        localName = TrimStart(TrimEnd(qname));
        //    } 
        //    else
        //    { 
        //        if (index == qname.Length - 1) 
        //            throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.InvalidXmlQualifiedName, qname)));
        //        prefix = TrimStart(qname.Substring(0, index)); 
        //        localName = TrimEnd(qname.Substring(index + 1));
        //    }
        //    ns = reader.LookupNamespace(prefix);
        //    if (ns == null) 
        //        throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new XmlException(SR.GetString(SR.UnboundPrefixInQName, qname)));
        //} 
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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