comparison kdiff3/src-QT4/merger.cpp @ 75:08ea9b86c12c

KDiff3-0.9.91

+/***************************************************************************
+                          merger.cpp  -  description
+                             -------------------
+    begin                : Sun Mar 24 2002
+    copyright            : (C) 2002-2004 by Joachim Eibl
+    email                : joachim.eibl at gmx.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "merger.h"
+#include <assert.h>
+#include <iostream>
+#include <iomanip>
+
+Merger::Merger( const DiffList* pDiffListAB, const DiffList* pDiffListCA )
+: md1( pDiffListAB, 0 ), md2( pDiffListCA, 1 )
+{
+}
+
+
+Merger::MergeData::MergeData( const DiffList* p, int i )
+: d(0,0,0)
+{
+   idx=i;
+   pDiffList = p;
+   if ( p!=0 )
+   {
+      it=p->begin();
+      update();
+   }
+}
+
+bool Merger::MergeData::eq()
+{
+   return pDiffList==0 || d.nofEquals > 0;
+}
+
+bool Merger::MergeData::isEnd()
+{
+   return ( pDiffList==0 || ( it==pDiffList->end() && d.nofEquals==0 && 
+      ( idx == 0 ? d.diff1==0 : d.diff2==0 )
+      ) );  
+}
+
+void Merger::MergeData::update()
+{
+   if ( d.nofEquals > 0 )
+      --d.nofEquals;
+   else if ( idx==0 && d.diff1 > 0 )
+      --d.diff1;
+   else if ( idx==1 && d.diff2 > 0 )
+      --d.diff2; 
+
+   while( d.nofEquals == 0  && (idx==0 && d.diff1 == 0 || idx==1 && d.diff2 == 0) 
+       && pDiffList!=0  &&  it != pDiffList->end() )
+   {
+      d = *it;
+      ++it;
+   }
+}
+
+void Merger::next()
+{
+   md1.update();
+   md2.update();
+}
+
+int Merger::whatChanged()
+{
+   int changed = 0;
+   changed |= md1.eq()  ?  0 : 1;
+   changed |= md2.eq()  ?  0 : 2;
+   return changed;
+}
+
+bool Merger::isEndReached()
+{
+   return md1.isEnd() && md2.isEnd();
+}