public IEnumerable <Simular> FindSimular(string carId, string rulesSetId, string hashValue, double threshold, RulesSet set = null)
{
RulesSet.Rule[] workedRules = null;
if (!_dictionary.ContainsKey(rulesSetId))
{
yield break;
}
foreach (var pair in _dictionary[rulesSetId])
{
if (pair.Key == carId)
{
continue;
}
var value = set == null?RulesSet.CompareHashes(hashValue, pair.Value) : RulesSet.CompareHashes(hashValue, pair.Value, set, out workedRules);
if (value > threshold)
{
yield return(new Simular {
CarId = pair.Key, Value = value, WorkedRules = workedRules
});
}
}
}
public IEnumerable <Simular> FindSimular([NotNull] string carId, [NotNull] string setId, [NotNull] byte[] hashValues, double threshold,
[NotNull] RulesSet set, bool keepWorkedRules)
{
var index = _setsKeys.IndexOf(setId);
if (index < 0)
{
throw new Exception($"Set “{setId}” is not defined");
}
foreach (var pair in _dictionary)
{
if (pair.Key == carId)
{
continue;
}
var pairHash = pair.Value[index];
var value = RulesSet.CompareHashes(hashValues, pairHash, set, keepWorkedRules, out var workedRules);
if (value > threshold)
{
yield return(new Simular {
CarId = pair.Key, Value = value, WorkedRules = workedRules
});
}
}
}
public static double CompareHashes(string lhs, string rhs, RulesSet rules, out Rule[] workedRules)
{
var lhsLines = Encoding.UTF8.GetString(Convert.FromBase64String(lhs)).Split('\n');
var rhsLines = Encoding.UTF8.GetString(Convert.FromBase64String(rhs)).Split('\n');
var size = lhsLines.Length - 1;
if (size != rhsLines.Length - 1 || size != rules._rules.Length)
{
workedRules = new Rule[] {};
return(0.0);
}
var workedRulesList = new List <Rule>();
var same = 0;
for (var i = 0; i < size; i++)
{
if (lhsLines[i] == rhsLines[i])
{
workedRulesList.Add(rules._rules[i]);
same++;
}
}
workedRules = workedRulesList.ToArray();
return((double)same / size);
}
public IEnumerable<Simular> FindSimular(string carId, string rulesSetId, string hashValue, double threshold, RulesSet set = null) {
RulesSet.Rule[] workedRules = null;
if (!_dictionary.ContainsKey(rulesSetId)) yield break;
foreach (var pair in _dictionary[rulesSetId]) {
if (pair.Key == carId) continue;
var value = set == null ? RulesSet.CompareHashes(hashValue, pair.Value) : RulesSet.CompareHashes(hashValue, pair.Value, set, out workedRules);
if (value > threshold) {
yield return new Simular {CarId = pair.Key, Value = value, WorkedRules = workedRules};
}
}
}
public static RulesEntry Create(KeyValuePair <string, string> x)
{
return(new RulesEntry(x.Key, x.Key.Split(':')[0], RulesSet.FromText(x.Value)));
}
public RulesEntry(string id, string commonId, RulesSet rules)
{
Id = id;
CommonId = commonId;
Rules = rules;
}
public static double CompareHashes(string lhs, string rhs, RulesSet rules, out Rule[] workedRules) {
var lhsLines = Encoding.UTF8.GetString(Convert.FromBase64String(lhs)).Split('\n');
var rhsLines = Encoding.UTF8.GetString(Convert.FromBase64String(rhs)).Split('\n');
var size = lhsLines.Length - 1;
if (size != rhsLines.Length - 1 || size != rules._rules.Length) {
workedRules = new Rule[]{};
return 0.0;
}
var workedRulesList = new List<Rule>();
var same = 0;
for (var i = 0; i < size; i++) {
if (lhsLines[i] == rhsLines[i]) {
workedRulesList.Add(rules._rules[i]);
same++;
}
}
workedRules = workedRulesList.ToArray();
return (double)same / size;
}
public static unsafe double CompareHashes([NotNull] byte[] lhs, [NotNull] byte[] rhs, [NotNull] RulesSet rules, bool keepWorkedRules,
[CanBeNull] out Rule[] workedRules)
{
if (lhs.Length != rhs.Length)
{
throw new Exception("Different amount of enties");
}
if (lhs.Length % sizeof(int) != 0)
{
throw new Exception("Array of integers required");
}
var workedRulesList = keepWorkedRules ? new List <Rule>() : null;
var a = lhs.Length / sizeof(int);
var total = 0d;
var same = 0d;
var zeros = true;
fixed(byte *lhp = lhs)
fixed(byte *rhp = rhs)
{
int *ld = (int *)lhp, rd = (int *)rhp;
for (var i = 0; i < a; i++)
{
var rule = rules._rules[i];
var l = ld[i];
var r = rd[i];
if (l == r)
{
if (l == -1)
{
continue;
}
workedRulesList?.Add(rule);
same += rule.Weight;
if (l != 0)
{
zeros = false;
}
}
total += rule.Weight;
}
}
if (zeros)
{
workedRules = keepWorkedRules ? new Rule[0] : null;
return(0d);
}
workedRules = workedRulesList?.ToArray();
return(same / total);
}