/// <summary>
/// Gets <see cref="FastFileInfo"/> for all the files in a directory that match a specific filter.
/// </summary>
/// <param name="path">The path to search.</param>
/// <param name="searchPattern">The search string to match against files in the path. Multiple can be specified separated by the pipe character.</param>
/// <returns>An list of FastFileInfo objects that match the specified search pattern.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="path"/> is a null reference (Nothing in VB)
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="filter"/> is a null reference (Nothing in VB)
/// </exception>
public static IList <FastFileInfo> GetFiles(String path, String searchPattern = "*", SearchOption searchOption = SearchOption.TopDirectoryOnly)
{
List <FastFileInfo> list = new List <FastFileInfo>();
String[] arr = searchPattern.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries);
Hashtable ht = (arr.Length > 1 ? new Hashtable() : null); // don't need to worry about case since it should be consistent
foreach (String sp in arr)
{
String sp2 = sp.Trim();
if (sp2.Length == 0)
{
continue;
}
IEnumerable <FastFileInfo> e = EnumerateFiles(path, sp2, searchOption);
if (ht == null)
{
list.AddRange(e);
}
else
{
var e2 = e.GetEnumerator();
if (ht.Count == 0)
{
while (e2.MoveNext())
{
FastFileInfo f = e2.Current;
list.Add(f);
ht[f.FullName] = f;
}
}
else
{
while (e2.MoveNext())
{
FastFileInfo f = e2.Current;
if (!ht.Contains(f.FullName))
{
list.Add(f);
ht[f.FullName] = f;
}
}
}
}
}
return(list);
}
private void EnumerateFiles(string dir, string searchPattern, Channel <string> channel)
{
try
{
var sw = new SpinWait();
//foreach (var file in Directory.EnumerateFiles(dir, searchPattern))
foreach (var file in FastFileInfo.EnumerateFiles(dir, searchPattern))
{
while (!channel.Writer.TryWrite(file.FullName))
{
sw.SpinOnce();
}
}
}
catch (UnauthorizedAccessException)
{
}
}