/// <summary>
/// Returns if the directory exists
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns></returns>
internal static bool FileExistsNoThrow(string fullPath)
{
fullPath = AttemptToShortenPath(fullPath);
if (NativeMethodsShared.IsWindows)
{
NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA data = new NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
if (success)
{
return((data.fileAttributes & NativeMethodsShared.FILE_ATTRIBUTE_DIRECTORY) == 0);
}
return(false);
}
try
{
return(File.Exists(fullPath));
}
catch
{
return(false);
}
}
/// <summary>
/// If there is a directory or file at the specified path, returns true.
/// Otherwise, returns false.
/// Does not throw IO exceptions, to match Directory.Exists and File.Exists.
/// Unlike calling each of those in turn it only accesses the disk once, which is faster.
/// </summary>
internal static bool FileOrDirectoryExistsNoThrow(string fullPath)
{
fullPath = AttemptToShortenPath(fullPath);
NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA data = new NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
return(success);
}
/// <summary>
/// Returns if the directory exists
/// </summary>
/// <param name="fullPath">Full path to the directory in the filesystem</param>
/// <returns></returns>
internal static bool DirectoryExistsNoThrow(string fullPath)
{
fullPath = AttemptToShortenPath(fullPath);
NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA data = new NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
if (success)
{
return((data.fileAttributes & NativeMethodsShared.FILE_ATTRIBUTE_DIRECTORY) != 0);
}
return(false);
}
/// <summary>
/// Get the last write time of the fullpath to the file.
/// If the file does not exist, then DateTime.MinValue is returned
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns></returns>
internal static DateTime GetLastWriteFileUtcTime(string fullPath)
{
DateTime fileModifiedTime = DateTime.MinValue;
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
if (success)
{
long dt = ((long)(data.ftLastWriteTimeHigh) << 32) | ((long)data.ftLastWriteTimeLow);
fileModifiedTime = DateTime.FromFileTimeUtc(dt);
}
return(fileModifiedTime);
}
/// <summary>
/// Get the last write time of the fullpath to the file.
/// If the file does not exist, then DateTime.MinValue is returned
/// </summary>
/// <param name="fullPath">Full path to the file in the filesystem</param>
/// <returns></returns>
internal static DateTime GetLastWriteFileUtcTime(string fullPath)
{
DateTime fileModifiedTime = DateTime.MinValue;
if (UseSymlinkTimeInsteadOfTargetTime)
{
WIN32_FILE_ATTRIBUTE_DATA data = new WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
if (success)
{
long dt = ((long)(data.ftLastWriteTimeHigh) << 32) | ((long)data.ftLastWriteTimeLow);
fileModifiedTime = DateTime.FromFileTimeUtc(dt);
}
}
else
{
using (SafeFileHandle handle =
CreateFile(fullPath, GENERIC_READ, FILE_SHARE_READ, IntPtr.Zero, OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL, IntPtr.Zero))
{
if (!handle.IsInvalid)
{
FILETIME ftCreationTime, ftLastAccessTime, ftLastWriteTime;
if (!GetFileTime(handle, out ftCreationTime, out ftLastAccessTime, out ftLastWriteTime) != true)
{
long fileTime = ((long)(uint)ftLastWriteTime.dwHighDateTime) << 32 |
(long)(uint)ftLastWriteTime.dwLowDateTime;
fileModifiedTime =
DateTime.FromFileTimeUtc(fileTime);
}
}
}
}
return(fileModifiedTime);
}
/// <summary>
/// If there is a directory or file at the specified path, returns true.
/// Otherwise, returns false.
/// Does not throw IO exceptions, to match Directory.Exists and File.Exists.
/// Unlike calling each of those in turn it only accesses the disk once, which is faster.
/// </summary>
internal static bool FileOrDirectoryExistsNoThrow(string fullPath)
{
fullPath = AttemptToShortenPath(fullPath);
if (NativeMethodsShared.IsWindows)
{
NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA data = new NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA();
bool success = false;
success = NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref data);
return(success);
}
else
{
try
{
return(File.Exists(fullPath) || Directory.Exists(fullPath));
}
catch
{
return(false);
}
}
}
internal static bool DirectoryExistsNoThrow(string fullPath)
{
fullPath = AttemptToShortenPath(fullPath);
NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA lpFileInformation = new NativeMethodsShared.WIN32_FILE_ATTRIBUTE_DATA();
return(NativeMethodsShared.GetFileAttributesEx(fullPath, 0, ref lpFileInformation) && ((lpFileInformation.fileAttributes & 0x10) != 0));
}