public static IMatchSet operator &(IMatchSet a, IMatchSet b)
{
if (b == null)
{
return(a);
}
if (a == null)
{
return(b);
}
MatchSet r = new MatchSet();
if (a.Count < b.Count)
{
foreach (EntryId n in a)
{
if (b.Contains(n))
{
r.Add(n);
}
}
}
else
{
foreach (EntryId n in b)
{
if (a.Contains(n))
{
r.Add(n);
}
}
}
return(r);
}
/// <summary>
/// Finds all matches from any of the provided string keys.
/// </summary>
/// <param name="stringKeys">set of string keys to find in index</param>
/// <param name="errors">Place to add error messages</param>
/// <returns>match set</returns>
public MatchSet Matches(List <string> stringKeys, List <string> errors = null)
{
MatchSet matches = new MatchSet();
foreach (string v in stringKeys)
{
matches.Or(tIndex[v]);
}
return(matches);
}
/// <summary>
/// Finds all matches from any of the provided number keys.
/// </summary>
/// <param name="numberKeys">set of number keys to find in index</param>
/// <param name="errors">Place to add error messages</param>
/// <returns>match set</returns>
public IMatchSet Matches(List <UInt64> numberKeys, List <string> errors = null)
{
MatchSet matches = new MatchSet();
foreach (UInt64 v in numberKeys)
{
matches.Or(nIndex[v]);
}
return(matches);
}
/// <summary>
/// Gets the key in the index that is the exact number provided, or returns an empty list.
/// </summary>
/// <param name="token">Key description token this is a hexadecimal number</param>
/// <param name="errors">Place to add error messages</param>
/// <returns>a list of unique number keys</returns>
List <UInt64> GetExactNumberKey(string token, List <string> errors = null)
{
IMatchSet matches = new MatchSet();
UInt64 address = UInt64.Parse(token, System.Globalization.NumberStyles.HexNumber);
List <UInt64> list = new List <ulong>();
if (nIndex.ContainsKey(address))
{
list.Add(address);
}
if (list.Count() == 0)
{
if (errors != null)
{
errors.Add(string.Format("number {0} not found in index ", token));
}
}
return(list);
}
public static IMatchSet operator |(IMatchSet a, IMatchSet b)
{
if (b == null)
{
return(a);
}
if (a == null)
{
return(b);
}
MatchSet r = new MatchSet();
foreach (EntryId n in a)
{
r.Add(n);
}
foreach (EntryId n in b)
{
r.Add(n);
}
return(r);
}
/// <summary>
/// add a log entry to the index
///
/// This method parse the entryString into Key tokens.
/// A number is determined when an alphanumeric sequence of characters is all hexidecimal characters.
/// 'badfeed' is a number, 'badfood' is not.
/// The rest of the string is split into substrings, delimited by any number or any delimiter character.
/// Each substring is converted into a valid key (trimming, and using '_' for spaces, etc.)
/// Each string key and number key is added to the index to help find this entry.
/// </summary>
/// <param name="entryId">the index into the log</param>
/// <param name="entryString">The string that describes the log entry</param>
public void AddLogEntry(int entryId, string entryString)
{
count = Math.Max(count, entryId + 1);
List <UInt64> numberKeys = new List <ulong>();
List <string> stringKeys = new List <string>();
states state = states.linenum;
int lastc = 0;
char prev = '0';
for (int i = 0; i < entryString.Count(); i++)
{
char c = entryString[i];
switch (state)
{
case states.linenum:
if (c == ',')
{
state = states.text;
lastc = i + 1;
}
break;
case states.text:
bool isStartOfNumber = false;
if (c == ' ' && i == lastc)
{
lastc++;
}
if (IsHex(c) && !IsAlphaNum(prev))
{
isStartOfNumber = true;
for (int j = i + 1; j < entryString.Length; j++)
{
char c2 = entryString[j];
if (IsHex(c2))
{
// still ok.
}
else if (c2 >= 'a' && c2 <= 'z')
{
isStartOfNumber = false;
break;
}
else
{
break;
}
}
}
if (isStartOfNumber)
{
if (i > lastc)
{
var p1 = entryString.Substring(lastc, i - lastc);
stringKeys.Add(p1);
}
lastc = i;
state = states.number;
}
break;
case states.number:
if (!IsHex(c))
{
if (i > lastc)
{
string num = entryString.Substring(lastc, i - lastc);
numberKeys.Add(UInt64.Parse(num, System.Globalization.NumberStyles.HexNumber));
}
lastc = i;
state = states.text;
}
break;
}
prev = c;
}
// cleanup
switch (state)
{
case states.linenum:
break;
case states.text:
stringKeys.Add(entryString.Substring(lastc));
break;
case states.number:
{
string num = entryString.Substring(lastc);
numberKeys.Add(UInt64.Parse(num, System.Globalization.NumberStyles.HexNumber));
}
break;
}
// add stringkeys to index
foreach (string s in stringKeys)
{
string[] parts = s.Split(delims);
foreach (string part in parts)
{
string p = IndexableString(part);
if (p == "")
{
continue;
}
lock (tIndex)
{
if (!tIndex.ContainsKey(p))
{
tIndex[p] = new MatchSet();
}
}
lock (tIndex[p])
{
tIndex[p].Add(new EntryId(entryId));
}
}
}
// add number keys to index
foreach (UInt64 n in numberKeys)
{
lock (nIndex)
{
if (!nIndex.ContainsKey(n))
{
nIndex[n] = new MatchSet();
}
nIndex[n].Add(new EntryId(entryId));
}
}
}