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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.Contracts;
namespace System.Globalization
{
public partial class TextInfo
{
//////////////////////////////////////////////////////////////////////////
////
//// TextInfo Constructors
////
//// Implements CultureInfo.TextInfo.
////
//////////////////////////////////////////////////////////////////////////
internal unsafe TextInfo(CultureData cultureData)
{
// This is our primary data source, we don't need most of the rest of this
_cultureData = cultureData;
_cultureName = _cultureData.CultureName;
_textInfoName = _cultureData.STEXTINFO;
FinishInitialization(_textInfoName);
}
private void FinishInitialization(string textInfoName)
{
const uint LCMAP_SORTHANDLE = 0x20000000;
long handle;
int ret = Interop.mincore.LCMapStringEx(_textInfoName, LCMAP_SORTHANDLE, null, 0, &handle, IntPtr.Size, null, null, IntPtr.Zero);
_sortHandle = ret > 0 ? (IntPtr)handle : IntPtr.Zero;
}
private unsafe string ChangeCase(string s, bool toUpper)
{
Contract.Assert(s != null);
//
// Get the length of the string.
//
int nLengthInput = s.Length;
//
// Check if we have the empty string.
//
if (nLengthInput == 0)
{
return s;
}
else
{
int ret;
// Check for Invariant to avoid A/V in LCMapStringEx
uint linguisticCasing = IsInvariantLocale(_textInfoName) ? 0 : LCMAP_LINGUISTIC_CASING;
//
// Create the result string.
//
string result = string.FastAllocateString(nLengthInput);
fixed (char* pSource = s)
fixed (char* pResult = result)
{
ret = Interop.mincore.LCMapStringEx(_sortHandle != IntPtr.Zero ? null : _textInfoName,
toUpper ? LCMAP_UPPERCASE | linguisticCasing : LCMAP_LOWERCASE | linguisticCasing,
pSource,
nLengthInput,
pResult,
nLengthInput,
null,
null,
_sortHandle);
}
if (0 == ret)
{
throw new InvalidOperationException(SR.InvalidOperation_ReadOnly);
}
Contract.Assert(ret == nLengthInput, "Expected getting the same length of the original string");
return result;
}
}
private unsafe char ChangeCase(char c, bool toUpper)
{
char retVal = '\0';
// Check for Invariant to avoid A/V in LCMapStringEx
uint linguisticCasing = IsInvariantLocale(_textInfoName) ? 0 : LCMAP_LINGUISTIC_CASING;
Interop.mincore.LCMapStringEx(_sortHandle != IntPtr.Zero ? null : _textInfoName,
toUpper ? LCMAP_UPPERCASE | linguisticCasing : LCMAP_LOWERCASE | linguisticCasing,
&c,
1,
&retVal,
1,
null,
null,
_sortHandle);
return retVal;
}
// PAL Ends here
private readonly 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)
{
return localeName == "";
}
}
}
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