public void Add(string internalFileName, int position, int length)
{
if (isDisposed)
{
throw new InvalidOperationException();
}
headerLookup.Add(internalFileName, new MyArchiveFileHeaderElement(position, length));
HeaderOrder.Add(position, internalFileName);
using (MemoryStream tempStream = new MemoryStream(TEMP_STREAM_BUFFER))
{
using (BinaryWriter writer = new BinaryWriter(tempStream))
{
writer.Write(internalFileName.Length);
foreach (char c in internalFileName)
{
writer.Write(c);
}
writer.Write(position);
writer.Write(length);
writer.Flush();
var buffer = tempStream.ToArray();
RawHeader.Write(buffer, 0, buffer.Length);
}
}
}
//public int CompressedHeaderLength { get; set; }
public void Dispose()
{
if (isDisposed)
{
return;
}
headerLookup.Clear();
HeaderOrder.Clear();
RawHeader.Close();
RawHeader.Dispose();
isDisposed = true;
}
public int Compare(object x, object y)
{
HeaderOrder ho = _sorter.ActiveHead;
if (ho == null)
{
return(0);
}
if (ho.Comparison == null)
{
_sorter.SearchHeaderComparer(_sorter.ActiveHead);
}
int c = 0;
int subIndex = ho.SubItemIndex;
try
{
c = ho.Comparison(
((ListViewItem)x).SubItems[subIndex].Text,
((ListViewItem)y).SubItems[subIndex].Text
);
if (_sorter.SortOrder == SortOrder.Descending)
{
c *= -1;
}
return(c);
}
catch
{
}
return(0);
}
protected void SearchHeaderComparer(HeaderOrder ho)
{
Random r = new Random();
IEnumerable <ListViewItem> items = Items.Cast <ListViewItem>();
List <string> list = items.Select(i => i.SubItems[ho.SubItemIndex].Text).Where(s => !String.IsNullOrEmpty(s)).OrderBy(i => r.Next(-1, 1)).ToList();
list = list.GetRange(
0,
(list.Count >= 10 ? 10 : list.Count)
);
long tryObjLong;
double tryObjDouble;
DateTime tryObjDate;
Dictionary <Comparison <string>, int> dict = new Dictionary <Comparison <string>, int>();
foreach (string str in list)
{
Comparison <string> func = null;
if (Double.TryParse(str, out tryObjDouble))
{
func = ho.CompareDouble;
}
else if (Int64.TryParse(str, out tryObjLong))
{
func = ho.CompareLong;
}
else if (DateTime.TryParse(str, out tryObjDate))
{
func = ho.CompareDate;
}
else
{
string[] strs = str.Split(" ".ToCharArray());
if (strs.Length > 1 && Double.TryParse(strs[0], out tryObjDouble))
{
func = ho.CompareSubString;
}
else
{
func = ho.CompareString;
}
}
if (func != null)
{
if (!dict.ContainsKey(func))
{
dict[func] = 0;
}
dict[func] += 1;
}
}
if (dict.Count == 1)
{
ho.Comparison = dict.Keys.First();
}
else
{
ho.Comparison = ho.CompareString;
}
}