From 8c8e860bacea7245fb06b7b7e12ca073f45e1a42 Mon Sep 17 00:00:00 2001
From: nvalimak <nvalimak@3cdefd35-fc62-479d-8e8d-bae585ffb9ca>
Date: Fri, 9 Jan 2009 13:34:54 +0000
Subject: [PATCH] Rewrote some data structures

git-svn-id: svn+ssh://idea.nguyen.vg/svn/sxsi/trunk/TextCollection@47 3cdefd35-fc62-479d-8e8d-bae585ffb9ca
---
 CSA.h | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/CSA.h b/CSA.h
index 00cf1c6..bd7b199 100644
--- a/CSA.h
+++ b/CSA.h
@@ -26,6 +26,7 @@
 #include "BitRank.h"
 #include "dynFMI.h"
 #include "TextCollection.h"
+#include "BlockArray.h"
 
 /**
  * Implementation of the TextCollection interface
@@ -85,6 +86,9 @@ public:
     void Load(FILE *, unsigned);
     void Save(FILE *) const;
 
+    // debug
+    TextPosition Lookup(TextPosition) const;
+
 private:
     class TCodeEntry {
     public:
@@ -109,7 +113,7 @@ private:
         ~THuffAlphabetRank();
         bool Test(uchar *, TextPosition);
         
-        inline ulong rank(int c, TextPosition i) const { // returns the number of characters c before and including position i
+        inline TextPosition rank(int c, TextPosition i) const { // returns the number of characters c before and including position i
             THuffAlphabetRank const * temp=this;
             if (codetable[c].count == 0) return 0;
             unsigned level = 0;
@@ -200,19 +204,29 @@ private:
     static const unsigned char report = 1;
     TextPosition n;
     unsigned samplerate;
-    ulong C[256];
+    unsigned C[256];
     TextPosition bwtEndPos;
     THuffAlphabetRank *alphabetrank;
     BitRank *sampled; 
-    ulong *suffixes;
-    ulong *positions;
+    BlockArray *suffixes;
+    BlockArray *positions;
     TCodeEntry *codetable;
     DynFMI *dynFMI;
-    // Map from end-marker in BWT to pair (textId, sampled text position)
-    std::map<TextPosition, std::pair<DocId, TextPosition> > endmarkers;
-    // Vector of pairs of <text length, text start position>
-    std::vector<std::pair<TextPosition, TextPosition> > textLength;
+
+    // Total number of texts in the collection
+    unsigned numberOfTexts;
+    // Length of the longest text
+    ulong maxTextLength;
     
+    
+    // Array of document id's in the order of end-markers in BWT
+    // Access by endmarkerDocId[rank_$(L, p) - 1].
+    BlockArray *endmarkerDocId;
+    // Array of text lengths (in the inserted order)
+    BlockArray *textLength;
+    // Array of text starting positions (in the inserted order)
+    BlockArray *textStartPos;
+ 
     // Private methods
     uchar * BWT(uchar *);
     uchar * LoadFromFile(const char *);
@@ -222,8 +236,8 @@ private:
 
     // Following are not part of the public API
     DocId DocIdAtTextPos(TextPosition) const;
+    unsigned CountEndmarkers(TextPosition, TextPosition) const;
     ulong Search(uchar const *, TextPosition, TextPosition *, TextPosition *) const;
-    TextPosition Lookup(TextPosition) const;
     TextPosition Inverse(TextPosition) const;
     TextPosition LF(uchar c, TextPosition &sp, TextPosition &ep) const;
     TextPosition Psi(TextPosition) const;
-- 
2.17.1