internal static IntPtr GetCachedSortHandle(string sortName)
{
lock (s_sortNameToSortHandleCache)
{
if (!s_sortNameToSortHandleCache.TryGetValue(sortName, out IntPtr result))
{
Interop.Globalization.ResultCode resultCode = Interop.Globalization.GetSortHandle(sortName, out result);
if (resultCode == Interop.Globalization.ResultCode.OutOfMemory)
{
throw new OutOfMemoryException();
}
else if (resultCode != Interop.Globalization.ResultCode.Success)
{
throw new ExternalException(SR.Arg_ExternalException);
}
try
{
s_sortNameToSortHandleCache.Add(sortName, result);
}
catch
{
Interop.Globalization.CloseSortHandle(result);
throw;
}
}
return(result);
}
}
private void InitSort(CultureInfo culture)
{
_sortName = culture.SortName;
if (_invariantMode)
{
_isAsciiEqualityOrdinal = true;
}
else
{
Interop.Globalization.ResultCode resultCode = Interop.Globalization.GetSortHandle(GetNullTerminatedUtf8String(_sortName), out _sortHandle);
if (resultCode != Interop.Globalization.ResultCode.Success)
{
_sortHandle.Dispose();
if (resultCode == Interop.Globalization.ResultCode.OutOfMemory)
{
throw new OutOfMemoryException();
}
throw new ExternalException(SR.Arg_ExternalException);
}
_isAsciiEqualityOrdinal = (_sortName == "en-US" || _sortName == "");
}
}
/// <summary>
/// Helper for making interop calls that return a string, but we don't know
/// the correct size of buffer to make. So invoke the interop call with an
/// increasing buffer until the size is big enough.
/// </summary>
internal static bool CallStringMethod <TArg1, TArg2, TArg3>(
Func <TArg1, TArg2, TArg3, StringBuilder, Interop.Globalization.ResultCode> interopCall,
TArg1 arg1,
TArg2 arg2,
TArg3 arg3,
out string result)
{
const int initialStringSize = 80;
const int maxDoubleAttempts = 5;
StringBuilder stringBuilder = StringBuilderCache.Acquire(initialStringSize);
for (int i = 0; i < maxDoubleAttempts; i++)
{
Interop.Globalization.ResultCode resultCode = interopCall(arg1, arg2, arg3, stringBuilder);
if (resultCode == Interop.Globalization.ResultCode.Success)
{
result = StringBuilderCache.GetStringAndRelease(stringBuilder);
return(true);
}
else if (resultCode == Interop.Globalization.ResultCode.InsufficentBuffer)
{
// increase the string size and loop
stringBuilder.EnsureCapacity(stringBuilder.Capacity * 2);
}
else
{
// if there is an unknown error, don't proceed
break;
}
}
StringBuilderCache.Release(stringBuilder);
result = null;
return(false);
}
