//
// Copyright (c) 2004-2006 Jaroslaw Kowalski <jaak@jkowalski.net>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * Neither the name of Jaroslaw Kowalski nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
//
using System;
using System.Text;
using System.Reflection;
using System.Collections;
using NLog.Config;
using NLog.Internal;
#if !NETCF
using NLog.Internal.Win32;
#endif
using System.IO;
namespace NLog.Internal
{
// optimized routines to get the size and last write time
// of the specified file
internal abstract class FileInfoHelper
{
public static readonly FileInfoHelper Helper;
static FileInfoHelper()
{
#if NETCF
Helper = new GenericFileInfoHelper();
#else
if (PlatformDetector.IsCurrentOSCompatibleWith(RuntimeOS.Windows) ||
PlatformDetector.IsCurrentOSCompatibleWith(RuntimeOS.WindowsNT))
{
Helper = new Win32FileInfoHelper();
}
else
{
Helper = new GenericFileInfoHelper();
}
#endif
}
public abstract bool GetFileInfo(string fileName, IntPtr fileHandle, out DateTime lastWriteTime, out long fileLength);
}
#if !NETCF
internal class Win32FileInfoHelper : FileInfoHelper
{
public override bool GetFileInfo(string fileName, IntPtr fileHandle, out DateTime lastWriteTime, out long fileLength)
{
Win32FileHelper.BY_HANDLE_FILE_INFORMATION fi;
if (Win32FileHelper.GetFileInformationByHandle(fileHandle, out fi))
{
lastWriteTime = DateTime.FromFileTime(fi.ftLastWriteTime);
fileLength = fi.nFileSizeLow + (((long)fi.nFileSizeHigh) << 32);
return true;
}
else
{
lastWriteTime = DateTime.MinValue;
fileLength = -1;
return false;
}
}
}
#endif
internal class GenericFileInfoHelper : FileInfoHelper
{
public override bool GetFileInfo(string fileName, IntPtr fileHandle, out DateTime lastWriteTime, out long fileLength)
{
FileInfo fi = new FileInfo(fileName);
if (fi.Exists)
{
fileLength = fi.Length;
lastWriteTime = fi.LastWriteTime;
return true;
}
else
{
fileLength = -1;
lastWriteTime = DateTime.MinValue;
return false;
}
}
}
}