private IEnumerable <LazyTrie> ReadChildren()
{
if (!File.Exists(_fileName))
{
yield break;
}
using (var fs = File.Open(_fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var reader = new StreamReader(fs, Encoding.Unicode))
{
Ffw(reader);
var rowIndex = _rowIndex;
while (true)
{
var line = reader.ReadLine();
if (string.IsNullOrWhiteSpace(line))
{
break;
}
var id = line.Substring(0, line.IndexOf(':'));
var c = line[0];
var eow = int.Parse(line.Substring(id.Length + 1)) == 1;
var depth = Int32.Parse(id.Substring(id.IndexOf('.') + 1));
if (depth == _depth + 1)
{
rowIndex++;
var trie = new LazyTrie(c, depth, eow, rowIndex, _fileName);
yield return(trie);
}
else if (depth == _depth)
{
break;
}
}
}
}
public void Add(IEnumerable <char> word, int depth = 0)
{
if (word == null)
{
throw new ArgumentNullException("word");
}
var list = word.ToArray();
if (list.Length == 0)
{
throw new ArgumentOutOfRangeException("word");
}
LazyTrie child;
if (!TryResolveChild(list[0], depth, out child))
{
child = new LazyTrie(list, depth, _fileName);
_nodes.Add(list[0], child);
}
else
{
child.Append(list, depth);
}
}
private IEnumerable <LazyTrie> GetBeginningOfWords()
{
var rowIndex = 0;
using (var fs = File.Open(_fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
using (var reader = new StreamReader(fs, Encoding.Unicode))
{
string line;
while ((line = reader.ReadLine()) != null)
{
rowIndex++;
if (string.IsNullOrWhiteSpace(line))
{
break;
}
var id = line.Substring(0, line.IndexOf(':'));
var c = line[0];
var depth = Int32.Parse(id.Substring(id.IndexOf('.') + 1));
if (depth == 0)
{
var eow = int.Parse(line.Substring(id.Length + 1)) == 1;
var trie = new LazyTrie(c, depth, eow, rowIndex, _fileName);
yield return(trie);
}
}
}
}
public void Put(LazyTrie trie, string directory)
{
var id = string.Format("{0}.{1}", trie.Val, trie.Depth);
var fileName = Path.Combine(directory, _containerId + ".tc");
InitWriteSession(fileName);
_writer.WriteLine("{0}:{1}", id, trie.Eow ? 1 : 0);
}
public bool TryResolveChild(char c, int depth, out LazyTrie trie)
{
if (_nodes == null)
{
ResolveChildren();
}
// ReSharper disable once PossibleNullReferenceException
return(_nodes.TryGetValue(c, out trie));
}