PrefixQName.cs

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using System.Diagnostics.CodeAnalysis;
 
namespace System.Xml.Xsl.XsltOld;
 
internal sealed class PrefixQName
{
    public string Prefix;
 
    public string Name;
 
    public string Namespace;
 
    [MemberNotNull("Prefix")]
    internal void ClearPrefix()
    {
        Prefix = string.Empty;
    }
 
    [MemberNotNull("Prefix")]
    [MemberNotNull("Name")]
    internal void SetQName(string qname)
    {
        ParseQualifiedName(qname, out Prefix, out Name);
    }
 
    public static void ParseQualifiedName(string qname, out string prefix, out string local)
    {
        prefix = string.Empty;
        local = string.Empty;
        int num = ValidateNames.ParseNCName(qname);
        if (num == 0)
        {
            throw XsltException.Create(System.SR.Xslt_InvalidQName, qname);
        }
        local = qname.Substring(0, num);
        if (num >= qname.Length)
        {
            return;
        }
        if (qname[num] == ':')
        {
            int startIndex = ++num;
            prefix = local;
            int num2 = ValidateNames.ParseNCName(qname, num);
            num += num2;
            if (num2 == 0)
            {
                throw XsltException.Create(System.SR.Xslt_InvalidQName, qname);
            }
            local = qname.Substring(startIndex, num2);
        }
        if (num < qname.Length)
        {
            throw XsltException.Create(System.SR.Xslt_InvalidQName, qname);
        }
    }
 
    public static bool ValidatePrefix(string prefix)
    {
        if (prefix.Length == 0)
        {
            return false;
        }
        int num = ValidateNames.ParseNCName(prefix, 0);
        return num == prefix.Length;
    }
}