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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics;
namespace System.Globalization
{
public partial class TextInfo
{
private unsafe void FinishInitialization()
{
if (_invariantMode)
{
_sortHandle = IntPtr.Zero;
return;
}
const uint LCMAP_SORTHANDLE = 0x20000000;
IntPtr handle;
int ret = Interop.Kernel32.LCMapStringEx(_textInfoName, LCMAP_SORTHANDLE, null, 0, &handle, IntPtr.Size, null, null, IntPtr.Zero);
_sortHandle = ret > 0 ? handle : IntPtr.Zero;
}
private unsafe void ChangeCase(char* pSource, int pSourceLen, char* pResult, int pResultLen, bool toUpper)
{
Debug.Assert(!_invariantMode);
Debug.Assert(pSource != null);
Debug.Assert(pResult != null);
Debug.Assert(pSourceLen >= 0);
Debug.Assert(pResultLen >= 0);
Debug.Assert(pSourceLen <= pResultLen);
// Check for Invariant to avoid A/V in LCMapStringEx
uint linguisticCasing = IsInvariantLocale(_textInfoName) ? 0 : LCMAP_LINGUISTIC_CASING;
int ret = Interop.Kernel32.LCMapStringEx(_sortHandle != IntPtr.Zero ? null : _textInfoName,
linguisticCasing | (toUpper ? LCMAP_UPPERCASE : LCMAP_LOWERCASE),
pSource,
pSourceLen,
pResult,
pSourceLen,
null,
null,
_sortHandle);
if (ret == 0)
{
throw new InvalidOperationException(SR.InvalidOperation_ReadOnly);
}
Debug.Assert(ret == pSourceLen, "Expected getting the same length of the original string");
}
// PAL Ends here
private IntPtr _sortHandle;
private const uint LCMAP_LINGUISTIC_CASING = 0x01000000;
private const uint LCMAP_LOWERCASE = 0x00000100;
private const uint LCMAP_UPPERCASE = 0x00000200;
private static bool IsInvariantLocale(string localeName) => localeName == "";
}
}
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