async Task <bool> LoadIndexFile(string indexFile, string baseFile)
{
Func <string, bool> log = AddLogRecord;
_header = Helper.ReadFromBinaryFile <SelfOrganizeIndexHeader>(indexFile, 0);
if (_header.version == 0)
{
logLstBox.BeginInvoke(log, new object[] { "Ошибка чтения заголовка" });
return(false);
}
logLstBox.BeginInvoke(log, new object[] { "Заголовок успешно прочитан" });
logLstBox.BeginInvoke(log, new object[] { "Загрузка index файла займёт некоторое время, пожалуйста, подождите" });
_linkedList = Helper.ReadFromBinaryFileLinkedList <SelfOrganizeIndexNode>(indexFile, _header.nodesBeginOffset, 0, true);
return(true);
}
void GenerateNewSelfOrganizingFile()
{
OpenFileDialog openDic = new OpenFileDialog();
openDic.Multiselect = false;
var items = new List <SelfOrganizeIndexNode>();
if (openDic.ShowDialog() == DialogResult.OK)
{
var fileName = GenerateNameForNewFile();
var lines = System.IO.File.ReadAllLines(openDic.FileName);
if (lines.Count() > 0)
{
Console.WriteLine("Be patient!Operation may take some time,depending on input file");
var indexFile = fileName + ".index";
var baseFile = fileName + ".base";
//Write 1st text element
var firstFileNode = new SelfOrganizeFileNode()
{
text = lines.ElementAt(0)
};
var firstFileNodePos = Helper.WriteToBinaryFile <SelfOrganizeFileNode>(baseFile, firstFileNode, FileMode.CreateNew);
var header = new SelfOrganizeIndexHeader()
{
version = _version,
hashType = _hashType,
count = lines.Count(),
nodesBeginOffset = 0,
};
//Write header
var firstIndexPos = Helper.WriteToBinaryFile <SelfOrganizeIndexHeader>(indexFile, header, FileMode.CreateNew, -1, false);
//Update header with correct information
header.nodesBeginOffset = firstIndexPos;
Helper.WriteToBinaryFile <SelfOrganizeIndexHeader>(indexFile, header, FileMode.Open, 0);
var firstIndexNode = new SelfOrganizeIndexNode()
{
hash = Helper.GetHash(firstFileNode.text, _hashType),
len = Marshal.SizeOf(firstFileNode),
offset = firstFileNodePos
};
//Add 1st index
Helper.WriteToBinaryFile <SelfOrganizeIndexNode>(indexFile, firstIndexNode, FileMode.Append);
var res = new List <SelfOrganizeIndexNode>();
for (int i = 1; i < lines.Count(); i++)
{
var item = lines[i];
var fileNode = new SelfOrganizeFileNode()
{
text = item
};
var lastNodePos = Helper.WriteToBinaryFile <SelfOrganizeFileNode>(baseFile, fileNode, FileMode.Append);
var indexNode = new SelfOrganizeIndexNode()
{
hash = Helper.GetHash(item, _hashType),
len = System.Runtime.InteropServices.Marshal.SizeOf(fileNode),
offset = lastNodePos
};
res.Add(indexNode);
}
Helper.WriteToBinaryFileList <SelfOrganizeIndexNode>(indexFile, res, FileMode.Append);
res.Clear();
}
}
}
