private IEnumerable <string> GetItemsInternal(string filter, DirectoryEnumerator.EnumerationType enumType, Predicate <NativeMethods.WIN32_FIND_DATA> extendedFilter = null)
{
string itemName;
NativeMethods.WIN32_FIND_DATA findData;
while (this.GetNextItem(filter, enumType, out itemName, out findData, extendedFilter))
{
yield return(itemName);
}
if (this.m_recurse)
{
foreach (string dir in this.m_realDirectories)
{
string fullPath = Path.Combine(this.m_path.FullName, dir);
using (DirectoryEnumerator dirEnum = new DirectoryEnumerator(new DirectoryInfo(fullPath), this.m_recurse, this.m_includeRecycleBin))
{
foreach (string item in dirEnum.GetItemsInternal(filter, enumType, extendedFilter))
{
yield return(item);
}
}
}
}
yield break;
}
private bool GetNextItem(string filter, DirectoryEnumerator.EnumerationType enumType, out string itemName, out NativeMethods.WIN32_FIND_DATA findData, Predicate <NativeMethods.WIN32_FIND_DATA> extendedFilter = null)
{
bool flag = false;
bool flag2 = false;
itemName = null;
findData = default(NativeMethods.WIN32_FIND_DATA);
findData.FileName = string.Empty;
findData.FileSizeHigh = 0U;
findData.FileSizeLow = 0U;
bool flag3;
do
{
if (this.m_safeFindHandle == null)
{
string fileName = Path.Combine(this.m_path.FullName, filter);
this.m_safeFindHandle = NativeMethods.FindFirstFile(fileName, out findData);
if (this.m_safeFindHandle == null || this.m_safeFindHandle.IsInvalid)
{
flag3 = false;
int lastWin32Error = Marshal.GetLastWin32Error();
if (lastWin32Error != 2)
{
this.ThrowIOException(lastWin32Error, "FindFirstFile");
}
}
else
{
flag3 = true;
}
}
else
{
flag3 = NativeMethods.FindNextFile(this.m_safeFindHandle, out findData);
if (!flag3)
{
int lastWin32Error2 = Marshal.GetLastWin32Error();
if (lastWin32Error2 != 18)
{
this.ThrowIOException(lastWin32Error2, "FindNextFile");
}
}
}
if (flag3)
{
if ((findData.FileAttributes & NativeMethods.FileAttributes.Directory) != NativeMethods.FileAttributes.None && !this.IsSpecialDirectoryName(findData.FileName) && (extendedFilter == null || extendedFilter(findData)))
{
flag2 = true;
}
switch (enumType)
{
case DirectoryEnumerator.EnumerationType.Files:
if ((findData.FileAttributes & NativeMethods.FileAttributes.Directory) == NativeMethods.FileAttributes.None && NativeMethods.PathMatchSpec(findData.FileName, filter))
{
flag = true;
}
break;
case DirectoryEnumerator.EnumerationType.Directories:
if (flag2)
{
flag = true;
}
break;
case DirectoryEnumerator.EnumerationType.FilesOrDirectories:
if (flag2)
{
flag = true;
}
else if ((findData.FileAttributes & NativeMethods.FileAttributes.Directory) == NativeMethods.FileAttributes.None && NativeMethods.PathMatchSpec(findData.FileName, filter))
{
flag = true;
}
break;
}
if (this.m_recurse && flag2)
{
this.m_realDirectories.Add(findData.FileName);
}
if (flag && extendedFilter != null && !extendedFilter(findData))
{
flag = false;
}
}
}while (flag3 && !flag);
if (flag)
{
if (this.ReturnBaseNames)
{
itemName = findData.FileName;
}
else
{
itemName = Path.Combine(this.m_path.FullName, findData.FileName);
}
}
else
{
this.ResetFindHandle();
}
return(flag);
}
private bool GetNextItem(string filter, DirectoryEnumerator.EnumerationType enumType, out string itemName)
{
NativeMethods.WIN32_FIND_DATA win32_FIND_DATA;
return(this.GetNextItem(filter, enumType, out itemName, out win32_FIND_DATA, null));
}
