SortKey.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Globalization / SortKey.cs / 1 / SortKey.cs
                        
                        
                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
////////////////////////////////////////////////////////////////////////////
// 
//  Class:    SortKey 
//
//  Purpose:  This class implements a set of methods for retrieving 
//            sort key information.
//
//  Date:     August 12, 1998
// 
////////////////////////////////////////////////////////////////////////////
 
namespace System.Globalization { 

    using System; 
    using System.Runtime.CompilerServices;

[System.Runtime.InteropServices.ComVisible(true)]
    [Serializable] public class SortKey 
    {
        //--------------------------------------------------------------------// 
        //                        Internal Information                        // 
        //-------------------------------------------------------------------//
 
        //
        //  Variables.
        //
        internal int win32LCID;           // 32-bit Win32 locale ID.  It may contain a 4-bit sort ID. 
        internal CompareOptions options;               // options
        internal String m_String;         // original string 
        internal byte[] m_KeyData;        // sortkey data 

        // Mask used to check if the c'tor has the right flags. 
        private const CompareOptions ValidSortkeyCtorMaskOffFlags = ~(CompareOptions.IgnoreCase | CompareOptions.IgnoreSymbols | CompareOptions.IgnoreNonSpace | CompareOptions.IgnoreWidth | CompareOptions.IgnoreKanaType | CompareOptions.StringSort);

        ////////////////////////////////////////////////////////////////////////
        // 
        //  SortKey Constructor
        // 
        //  Implements CultureInfo.CompareInfo.GetSortKey(). 
        //  Package access only.
        // 
        ////////////////////////////////////////////////////////////////////////

        unsafe internal SortKey(void* pSortingFile, int win32LCID, String str, CompareOptions options)
        { 
            if (str==null) {
                throw new ArgumentNullException("str"); 
            } 

            // 
            //  WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING!
            //
            //  This parameter check was added in Whidbey prior to Beta 2. We are keeping this
            //  change in mind in case we hear of any issues with it. 
            //
            //  WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! WARNING! 
            // 
            if ((options & ValidSortkeyCtorMaskOffFlags) != 0)
            { 
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidFlag"), "options");
            }

            //This takes the sort id from CompareInfo, so we should be able to skip initializing it. 
            this.win32LCID = win32LCID;
 
            this.options = options; 
            m_String = str;
 
            //We need an initialized SortTable here, but since we're getting this as an instance
            //method off of a CompareInfo, we're guaranteed that that already happened.
            m_KeyData = CompareInfo.nativeCreateSortKey(pSortingFile, str, (int)options, win32LCID);
        } 

#if !FEATURE_PAL 
 
        //
        // The following constructor is designed to be called from CompareInfo to get the 
        // the sort key of specific string for synthetic culture
        //

        //  
        internal SortKey(int win32LCID, String str, CompareOptions options)
        { 
            if (str==null) { throw new ArgumentNullException("str"); } 

            if ((options & ValidSortkeyCtorMaskOffFlags) != 0) 
            {
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidFlag"), "options");
            }
 
            if (CultureInfo.GetNativeSortKey(win32LCID, CompareInfo.GetNativeCompareFlags(options), str, str.Length, out m_KeyData) <= 0)
            { 
                throw new ArgumentException(Environment.GetResourceString("Argument_InvalidFlag"), "str"); 
            }
 
            this.win32LCID   = win32LCID;
            this.options     = options;
            this.m_String    = str;
        } 

#endif // !FEATURE_PAL 
 

        //////////////////////////////////////////////////////////////////////// 
        //
        //  GetOriginalString
        //
        //  Returns the original string used to create the current instance 
        //  of SortKey.
        // 
        //////////////////////////////////////////////////////////////////////// 
        public virtual String OriginalString
        { 
            get {
                return (m_String);
            }
        } 

 
        //////////////////////////////////////////////////////////////////////// 
        //
        //  GetKeyData 
        //
        //  Returns a byte array representing the current instance of the
        //  sort key.
        // 
        ////////////////////////////////////////////////////////////////////////
        public virtual byte[] KeyData 
        { 
            get {
                return (byte[])(m_KeyData.Clone()); 
            }
        }

 
        ////////////////////////////////////////////////////////////////////////
        // 
        //  Compare 
        //
        //  Compares the two sort keys.  Returns 0 if the two sort keys are 
        //  equal, a number less than 0 if sortkey1 is less than sortkey2,
        //  and a number greater than 0 if sortkey1 is greater than sortkey2.
        //
        //////////////////////////////////////////////////////////////////////// 
        public static int Compare(SortKey sortkey1, SortKey sortkey2) {
 
            if (sortkey1==null || sortkey2==null) { 
                throw new ArgumentNullException((sortkey1==null ? "sortkey1": "sortkey2"));
            } 

            byte[] key1Data = sortkey1.m_KeyData;
            byte[] key2Data = sortkey2.m_KeyData;
 
            BCLDebug.Assert(key1Data!=null, "key1Data!=null");
            BCLDebug.Assert(key2Data!=null, "key2Data!=null"); 
 
            if (key1Data.Length == 0) {
                if (key2Data.Length == 0) { 
                    return (0);
                }
                return (-1);
            } 
            if (key2Data.Length == 0) {
                return (1); 
            } 

            int compLen = (key1Data.Lengthkey2Data[i]) {
                    return (1); 
                }
                if (key1Data[i]
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SortKey.cs source code in C# .NET

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