public static DateTime GetFileCreationTime(
string filePath)
{
filePath = CheckAddLongPathPrefix(filePath);
PInvokeHelper.WIN32_FIND_DATA fd;
var result = PInvokeHelper.FindFirstFile(filePath.TrimEnd('\\'), out fd);
if (result == PInvokeHelper.INVALID_HANDLE_VALUE)
{
return(DateTime.MinValue);
}
try
{
if (result.ToInt64() == PInvokeHelper.ERROR_FILE_NOT_FOUND)
{
return(DateTime.MinValue);
}
else
{
var ft = fd.ftCreationTime;
var hft2 = (((long)ft.dwHighDateTime) << 32) + ft.dwLowDateTime;
return(getLocalTime(hft2));
}
}
finally
{
PInvokeHelper.FindClose(result);
}
}
public static ZlpFileInfo[] GetFiles(string directoryPath, string pattern, SearchOption searchOption)
{
directoryPath = CheckAddLongPathPrefix(directoryPath);
var results = new List <ZlpFileInfo>();
PInvokeHelper.WIN32_FIND_DATA findData;
var findHandle = PInvokeHelper.FindFirstFile(directoryPath.TrimEnd('\\') + "\\" + pattern, out findData);
if (findHandle != PInvokeHelper.INVALID_HANDLE_VALUE)
{
try
{
bool found;
do
{
var currentFileName = findData.cFileName;
// if this is a file, find its contents
if (((int)findData.dwFileAttributes & PInvokeHelper.FILE_ATTRIBUTE_DIRECTORY) == 0)
{
results.Add(new ZlpFileInfo(ZlpPathHelper.Combine(directoryPath, currentFileName)));
}
// find next
found = PInvokeHelper.FindNextFile(findHandle, out findData);
} while (found);
}
finally
{
// close the find handle
PInvokeHelper.FindClose(findHandle);
}
}
if (searchOption == SearchOption.AllDirectories)
{
foreach (var dir in GetDirectories(directoryPath))
{
results.AddRange(GetFiles(dir.FullName, pattern, searchOption));
}
}
return(results.ToArray());
}
public static ZlpDirectoryInfo[] GetDirectories(string directoryPath, string pattern)
{
directoryPath = CheckAddLongPathPrefix(directoryPath);
var results = new List <ZlpDirectoryInfo>();
PInvokeHelper.WIN32_FIND_DATA findData;
var findHandle = PInvokeHelper.FindFirstFile(directoryPath.TrimEnd('\\') + @"\" + pattern, out findData);
if (findHandle != PInvokeHelper.INVALID_HANDLE_VALUE)
{
try
{
bool found;
do
{
var currentFileName = findData.cFileName;
// if this is a directory, find its contents
if (((int)findData.dwFileAttributes & PInvokeHelper.FILE_ATTRIBUTE_DIRECTORY) != 0)
{
if (currentFileName != @"." && currentFileName != @"..")
{
results.Add(new ZlpDirectoryInfo(ZlpPathHelper.Combine(directoryPath, currentFileName)));
}
}
// find next
found = PInvokeHelper.FindNextFile(findHandle, out findData);
} while (found);
}
finally
{
// close the find handle
PInvokeHelper.FindClose(findHandle);
}
}
return(results.ToArray());
}
public static long GetFileLength(string filePath)
{
Trace.TraceInformation(@"About to get file length for path '{0}'.", filePath);
// 2014-06-10, Uwe Keim: Weil das auf 64-bit-Windows 8 nicht sauber läuft,
// zunächst mal bei kürzeren Pfaden die eingebaute Methode nehmen.
if (!MustBeLongPath(filePath))
{
return(new FileInfo(filePath).Length);
}
filePath = CheckAddLongPathPrefix(filePath);
PInvokeHelper.WIN32_FIND_DATA fd;
var result = PInvokeHelper.FindFirstFile(filePath.TrimEnd('\\'), out fd);
if (result == PInvokeHelper.INVALID_HANDLE_VALUE)
{
return(0);
}
try
{
if (result.ToInt64() == PInvokeHelper.ERROR_FILE_NOT_FOUND)
{
return(0);
}
else
{
var sfh = new SafeFileHandle(result, false);
if (sfh.IsInvalid)
{
var num = Marshal.GetLastWin32Error();
if ((num == 2 || num == 3 || num == 21))
// http://msdn.microsoft.com/en-us/library/windows/desktop/ms681382(v=vs.85).aspx
{
return(0);
}
else
{
return(0);
}
}
// http://zetalongpaths.codeplex.com/discussions/580478#post1351470
// https://mcdrummerman.wordpress.com/2010/07/13/win32_find_data-and-negative-file-sizes/
//store nFileSizeLow
long fDataFSize = (long)fd.nFileSizeLow;
//store individual file size for later accounting usage
long fileSize = 0;
if (fDataFSize < 0 && (long)fd.nFileSizeHigh > 0)
{
fileSize = fDataFSize + 0x100000000 + ((long)fd.nFileSizeHigh * 0x100000000);
}
else
{
if ((long)fd.nFileSizeHigh > 0)
{
fileSize = fDataFSize + ((long)fd.nFileSizeHigh * 0x100000000);
}
else if (fDataFSize < 0)
{
fileSize = (fDataFSize + 0x100000000);
}
else
{
fileSize = fDataFSize;
}
}
return(fileSize);
/*
* var low = fd.nFileSizeLow;
* var high = fd.nFileSizeHigh;
*
* //return (high * (0xffffffff + 1)) + low;
* //return (((ulong)high) << 32) + low;
* var l = ((high << 0x20) | (low & 0xffffffffL));
* // Copied from FileInfo.Length via Reflector.NET.
* return (ulong) l;*/
var low = fd.nFileSizeLow;
var high = fd.nFileSizeHigh;
Trace.TraceInformation(@"FindFirstFile returned LOW = {0}, HIGH = {1}.", low, high);
Trace.Flush();
try
{
return((long)high << 32 | ((long)low & (long)(0xffffffffL)));
//try
//{
//var sign = ((long) high << 32 | (low & 0xffffffffL));
//try
//{
//return sign <= 0 ? 0 : unchecked((ulong) sign);
//}
// catch (OverflowException x)
// {
// var y = new OverflowException(@"Error getting file length (cast).", x);
// y.Data[@"low"] = low;
// y.Data[@"high"] = high;
// y.Data[@"signed value"] = sign;
// throw y;
// }
//}
//catch (OverflowException x)
//{
// var y = new OverflowException(@"Error getting file length (sign).", x);
// y.Data[@"low"] = low;
// y.Data[@"high"] = high;
// throw y;
//}
}
catch (OverflowException x)
{
Trace.TraceInformation(
@"Got overflow exception ('{3}') for path '{0}'. LOW = {1}, HIGH = {2}.", filePath, low,
high, x.Message);
Trace.Flush();
throw;
}
}
}
finally
{
PInvokeHelper.FindClose(result);
}
}
