public void IndexAllVersions()
{
/////////////////////////////////////////////////////////////////
// Go through the bible and build a forward index
Dictionary <string, List <int> > forwardIndex = new Dictionary <string, List <int> >();
string badchars = "',.?!:;`-\"()[]";
using (PerformanceTimer pt = new PerformanceTimer("Analyze"))
using (FBirdTask t = new FBirdTask())
{
t.CommandText = "SELECT \"BibleLookUp\".\"OrderNum\", BIBLEVERSES.REFCHAPTER, BIBLEVERSES.REFVERSE, BIBLEVERSES.DATA, Version " +
"FROM BIBLEVERSES " +
"INNER JOIN \"BibleLookUp\" ON (BIBLEVERSES.REFBOOK=\"BibleLookUp\".\"RefBook\") " +
"WHERE (Version = 'KJV')";
using (PerformanceTimer pt2 = new PerformanceTimer("Analyze - Initial exec"))
t.ExecuteReader();
using (PerformanceTimer pt2 = new PerformanceTimer("Analyze - Data read"))
while (t.DR.Read())
{
string s = t.DR.GetString(3).ToLower(); // get raw
foreach (char c in badchars) // strip bad chars
{
s = s.Replace(c.ToString(), " ");
}
string[] words = s.Split(" ".ToCharArray());
// Count
List <string> localWords = new List <string>();
foreach (string word in words)
{
if (word.Length > 0)
{
// Check local
if (!localWords.Contains(word))
{
localWords.Add(word);
// Ensure list
if (!forwardIndex.ContainsKey(word))
{
forwardIndex[word] = new List <int>();
}
int z = ((byte)t.DR.GetInt16(2))
+ ((byte)t.DR.GetInt16(1) << 8)
+ ((byte)t.DR.GetInt16(0) << 16);
// Adjust for version
if (t.DR.GetString(4) == "RST")
{
z += ((byte)1 << 24);
}
else
{
z += ((byte)2 << 24);
}
forwardIndex[word].Add(z);
}
}
}
}
}
/////////////////////////////////////////////////////////////////
// Sort words
List <string> sortedWords = new List <string>();
foreach (string s in forwardIndex.Keys)
{
sortedWords.Add(s);
}
sortedWords.Sort();
/////////////////////////////////////////////////////////////////
// Write indexs to file
Dictionary <string, int> wordIndex = new Dictionary <string, int>();
string pthIndex = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "bibndx.bin");
FileStream fs = new FileStream(pthIndex, FileMode.Create, FileAccess.Write);
foreach (string key in sortedWords)
{
// Store the current word offset into word map
wordIndex.Add(key, (int)fs.Position);
// Write the count of results
byte[] bInt = BitConverter.GetBytes((int)forwardIndex[key].Count);
fs.Write(bInt, 0, 4);
// Write out all the result pointers
foreach (int i in forwardIndex[key])
{
bInt = BitConverter.GetBytes(i);
fs.Write(bInt, 0, 4);
}
}
fs.Flush();
fs.Close();
/////////////////////////////////////////////////////////////////
// Write word list to file
string pthWords = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "bibwds.bin");
FileStream fs2 = new FileStream(pthWords, FileMode.Create, FileAccess.Write, FileShare.None);
foreach (string s in wordIndex.Keys)
{
byte[] bCurWord = UnicodeEncoding.Unicode.GetBytes(s);
fs2.WriteByte((byte)bCurWord.Length);
fs2.Write(bCurWord, 0, bCurWord.Length);
byte[] bInt = BitConverter.GetBytes((int)wordIndex[s]);
fs2.Write(bInt, 0, 4);
}
fs2.Flush();
fs2.Close();
}
public List <int> QueryWordFrags(string[] wordFrags)
{
/// For each word, expand word list
/// For each word, build a primary list by using all the words in expanded list
List <int> primarys = new List <int>();
Dictionary <string, List <int> > fragPrimaries = new Dictionary <string, List <int> >();
// Ensure init
if (wordOffsetTable == null)
{
InitWordOffsetTable();
}
// Match all the partial words
Dictionary <string, List <string> > expandedWords = new Dictionary <string, List <string> >(); // original, expanded
foreach (string wordFrag in wordFrags)
{
foreach (string s in wordOffsetTable.Keys)
{
if (!expandedWords.ContainsKey(wordFrag))
{
expandedWords.Add(wordFrag, new List <string>());
}
if (s.Contains(wordFrag) && !expandedWords[wordFrag].Contains(s))
{
expandedWords[wordFrag].Add(s);
}
}
}
// Load file into memory
if (msIndex == null)
{
string pthIndex = Path.Combine(Path.GetDirectoryName(Application.ExecutablePath), "bibndx.bin");
FileStream fs = new FileStream(pthIndex, FileMode.Open, FileAccess.Read);
byte[] bytes = new byte[fs.Length];
fs.Read(bytes, 0, (int)fs.Length);
fs.Close();
msIndex = new MemoryStream(bytes);
}
// Get a list of keys
byte[] keyCount = new byte[4];
using (PerformanceTimer pt = new PerformanceTimer("Main"))
foreach (string word in expandedWords.Keys)
{
if (!fragPrimaries.ContainsKey(word))
{
fragPrimaries.Add(word, new List <int>());
}
foreach (string exWord in expandedWords[word])
{
msIndex.Position = wordOffsetTable[exWord]; // Seek to position
// Get count of results
msIndex.Read(keyCount, 0, 4);
int count = BitConverter.ToInt32(keyCount, 0);
// Loop through all the kyes
byte[] bytes = new byte[4];
for (int i = 0; i < count; i++)
{
msIndex.Read(bytes, 0, 4);
int primary = BitConverter.ToInt32(bytes, 0);
if (!fragPrimaries[word].Contains(primary))
{
fragPrimaries[word].Add(primary);
}
}
}
}
// Filter to only overlapping
bool first = true;
using (PerformanceTimer pt = new PerformanceTimer("Filter"))
foreach (List <int> li in fragPrimaries.Values)
{
List <int> j = new List <int>();
foreach (int i in li)
{
if (first || primarys.Contains(i))
{
j.Add(i);
}
}
primarys = j;
first = false;
}
return(primarys);
}