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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 Microsoft.Win32.SafeHandles;
using System;
using System.IO;
using System.Runtime.InteropServices;
internal partial class Interop
{
internal partial class Kernel32
{
/// <summary>
/// WARNING: This method does not implicitly handle long paths. Use FindFirstFile.
/// </summary>
[DllImport(Libraries.Kernel32, EntryPoint = "FindFirstFileExW", SetLastError = true, CharSet = CharSet.Unicode)]
private static extern SafeFindHandle FindFirstFileExPrivate(string lpFileName, FINDEX_INFO_LEVELS fInfoLevelId, ref WIN32_FIND_DATA lpFindFileData, FINDEX_SEARCH_OPS fSearchOp, IntPtr lpSearchFilter, int dwAdditionalFlags);
internal static SafeFindHandle FindFirstFile(string fileName, ref WIN32_FIND_DATA data)
{
fileName = PathInternal.EnsureExtendedPrefixIfNeeded(fileName);
// use FindExInfoBasic since we don't care about short name and it has better perf
return FindFirstFileExPrivate(fileName, FINDEX_INFO_LEVELS.FindExInfoBasic, ref data, FINDEX_SEARCH_OPS.FindExSearchNameMatch, IntPtr.Zero, 0);
}
internal enum FINDEX_INFO_LEVELS : uint
{
FindExInfoStandard = 0x0u,
FindExInfoBasic = 0x1u,
FindExInfoMaxInfoLevel = 0x2u,
}
internal enum FINDEX_SEARCH_OPS : uint
{
FindExSearchNameMatch = 0x0u,
FindExSearchLimitToDirectories = 0x1u,
FindExSearchLimitToDevices = 0x2u,
FindExSearchMaxSearchOp = 0x3u,
}
}
}
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