/// <summary>
/// The scan file.
/// </summary>
/// <param name="hash"></param>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
public bool ScanFile(string hash)
{
// If caching is activated, look in cache before scanning
if (Properties.Settings.Default.UseCashing)
{
// If hash is in the clean MD5 cache, then return false
if (ScannerCaching.IsFileInCache(hash))
{
return(false);
}
}
if (Properties.Settings.Default.UseRAMOnly)
{
// All files are cached in memory, and can be accessed
// without loading any files from HHD
if (ScannerCaching.IsFileInCache(hash))
{
return(false);
}
}
// Else check the file against the database
var databaseDirectory = Thread.GetDomain().BaseDirectory + "SuffixArrays\\";
var suffixArray = this.DeserializeArray(databaseDirectory + hash.Substring(0, Properties.Settings.Default.SplitOption) + ".data");
var completeString =
this.DeserializeString(databaseDirectory + ScannerConst.StringIdentificationName + hash.Substring(0, Properties.Settings.Default.SplitOption) + ".data");
if (suffixArray == null && completeString == string.Empty)
{
return(false);
}
var result = !this.IndexOf(hash, suffixArray, completeString).Equals(-1);
// If the result is false, then the file is clean
// and can be added to the cache
if (!result)
{
ScannerCaching.UpdateCache(hash);
}
// Report back with findings
return(result);
}
/// <summary>
/// The scan file.
/// </summary>
/// <param name="pattern"></param>
/// <returns>
/// The <see cref="bool"/>.
/// </returns>
public static bool ScanFile(string pattern)
{
var prefix = Convert.ToChar(pattern.Substring(0, Properties.Settings.Default.SplitOption));
var directory = Thread.GetDomain().BaseDirectory + "\\SuffixArrays\\";
// If SQL has the database
if (Properties.Settings.Default.UseHDDOnly)
{
if (Properties.Settings.Default.UseCashing)
{
if (ScannerCaching.IsFileInCache(pattern))
{
// If value is in cache, just return false,
// since pattern is clean
return(false);
}
}
var suffixArray = FileUtil.DeserializeArray(directory + "sa_" + prefix);
var txt = FileUtil.DeserializeString(directory + "string_" + prefix);
// TODO: Load files from HDD
var lcp = Database.GetLcpTableByPrefix(prefix);
var suffixarray = Database.GetSuffixArrayTableByPrefix(prefix);
var text = Database.GetTextFromDatabase(Convert.ToChar(prefix));
// If its not in the cache we will use another method
if (Properties.Settings.Default.UseBinary)
{
var result = !IndexOf(suffixarray, text, pattern).Equals(-1);
if (!result)
{
ScannerCaching.UpdateCache(pattern);
}
return(result);
}
if (Properties.Settings.Default.UseBinaryWLcp)
{
var result = BinarySearchUsingLcp.BinarySearchLcp(text, suffixarray, lcp, pattern);
if (!result)
{
ScannerCaching.UpdateCache(pattern);
}
return(result);
}
if (Properties.Settings.Default.UseSQL)
{
var result = Database.SearchByPattern(pattern);
if (!result)
{
ScannerCaching.UpdateCache(pattern);
}
return(result);
}
}
// Use memory database
else if (Properties.Settings.Default.UseRAMOnly)
{
// Use caching if activated
if (Properties.Settings.Default.UseCashing)
{
if (ScannerCaching.CleanCache == null)
{
ScannerCaching.LoadCashedValues();
}
// All files are cached in memory, and can be accessed
// without loading any files from HHD (they are preloaded)
if (ScannerCaching.IsFileInCache(pattern))
{
return(false);
}
}
var suffixArray = FileUtil.DeserializeArray(directory + "sa_" + prefix);
var txt = FileUtil.DeserializeString(directory + "string_" + prefix);
// If its not in the cache we will use another method
if (Properties.Settings.Default.UseBinary)
{
var result = !IndexOf(suffixArray, txt, pattern).Equals(-1);
if (!result)
{
ScannerCaching.UpdateCache(pattern);
}
return(result);
}
//if (Properties.Settings.Default.UseBinaryWLcp)
//{
// var result = !BinarySearchUsingLcp.BinarySearchLcp(txt, suffixArray, pattern);
// if (!result) ScannerCaching.UpdateCache(pattern);
// return result;
//}
if (Properties.Settings.Default.UseSQL)
{
var result = Database.SearchByPattern(pattern);
if (!result)
{
ScannerCaching.UpdateCache(pattern);
}
return(result);
}
}
return(false);
}
