private static void GetFilesExDirectories_Windows_Internal(string directory, string fileName, int maxDepth, int minDepth, int currentDepth, List <string> files, List <NtQueryDirectoryFileSearcher.FileInformation> fileInfoBuffer, List <NtQueryDirectoryFileSearcher.DirectoryInformation> dirInfoBuffer)
{
fileInfoBuffer.Clear();
dirInfoBuffer.Clear();
// We always need to query because we need directories.
NtQueryDirectoryFileSearcher.TryGetDirectoryContents(directory, fileInfoBuffer, dirInfoBuffer);
if (currentDepth >= minDepth - 1 && currentDepth < maxDepth)
{
foreach (var fileInfo in fileInfoBuffer)
{
if (fileInfo.FileName.Equals(fileName, StringComparison.OrdinalIgnoreCase))
{
files.Add(Path.Combine(fileInfo.DirectoryPath, fileInfo.FileName));
}
}
}
if (currentDepth + 1 >= maxDepth)
{
return;
}
foreach (var subdir in dirInfoBuffer.ToArray())
{
GetFilesExDirectories_Windows_Internal(subdir.FullPath, fileName, maxDepth, minDepth, currentDepth + 1, files, fileInfoBuffer, dirInfoBuffer);
}
}
/// <summary>
/// Gets all files in a given directory, accelerated for Windows platform.
/// </summary>
/// <param name="path">The path to get files from.</param>
/// <param name="fileName">Pattern to search.</param>
public static string[] GetFilesInDirectory(string path, string fileName)
{
if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(Directory.GetFiles(path, fileName, SearchOption.TopDirectoryOnly));
}
#pragma warning disable CA1416 // Validate platform compatibility
var files = new List <NtQueryDirectoryFileSearcher.FileInformation>();
var directories = new List <NtQueryDirectoryFileSearcher.DirectoryInformation>();
if (!NtQueryDirectoryFileSearcher.TryGetDirectoryContents(path, files, directories))
{
return(Directory.GetFiles(path, fileName, SearchOption.TopDirectoryOnly));
}
var filePaths = new List <string>(files.Count);
foreach (var file in files)
{
if (file.FileName.Equals(fileName, StringComparison.OrdinalIgnoreCase))
{
filePaths.Add(Path.Combine(file.DirectoryPath, file.FileName));
}
}
#pragma warning restore CA1416
return(filePaths.ToArray());
}
