SortKey.cs

using System.Runtime.InteropServices;
using System.Runtime.Serialization;

namespace System.Globalization
{
    [Serializable]
    [ComVisible(true)]
    public class SortKey
    {
        [OptionalField(VersionAdded = 3)]
        internal string localeName;

        [OptionalField(VersionAdded = 1)]
        internal int win32LCID;

        internal CompareOptions options;

        internal string m_String;

        internal byte[] m_KeyData;

        public virtual string OriginalString => m_String;

        public virtual byte[] KeyData => (byte[])m_KeyData.Clone();

        internal SortKey(string localeName, string str, CompareOptions options, byte[] keyData)
        {
            m_KeyData = keyData;
            this.localeName = localeName;
            this.options = options;
            m_String = str;
        }

        [OnSerializing]
        private void OnSerializing(StreamingContext context)
        {
            if (win32LCID == 0)
            {
                win32LCID = CultureInfo.GetCultureInfo(localeName).LCID;
            }
        }

        [OnDeserialized]
        private void OnDeserialized(StreamingContext context)
        {
            if (string.IsNullOrEmpty(localeName) && win32LCID != 0)
            {
                localeName = CultureInfo.GetCultureInfo(win32LCID).Name;
            }
        }

        public static int Compare(SortKey sortkey1, SortKey sortkey2)
        {
            if (sortkey1 == null || sortkey2 == null)
            {
                throw new ArgumentNullException((sortkey1 == null) ? "sortkey1" : "sortkey2");
            }
            byte[] keyData = sortkey1.m_KeyData;
            byte[] keyData2 = sortkey2.m_KeyData;
            if (keyData.Length == 0)
            {
                if (keyData2.Length == 0)
                {
                    return 0;
                }
                return -1;
            }
            if (keyData2.Length == 0)
            {
                return 1;
            }
            int num = (keyData.Length < keyData2.Length) ? keyData.Length : keyData2.Length;
            for (int i = 0; i < num; i++)
            {
                if (keyData[i] > keyData2[i])
                {
                    return 1;
                }
                if (keyData[i] < keyData2[i])
                {
                    return -1;
                }
            }
            return 0;
        }

        public override bool Equals(object value)
        {
            SortKey sortKey = value as SortKey;
            if (sortKey != null)
            {
                return Compare(this, sortKey) == 0;
            }
            return false;
        }

        public override int GetHashCode()
        {
            return CompareInfo.GetCompareInfo(localeName).GetHashCodeOfString(m_String, options);
        }

        public override string ToString()
        {
            return "SortKey - " + localeName + ", " + options + ", " + m_String;
        }
    }
}