Initial import

1 files changed, 297 insertions, 0 deletions

diff --git a/compareDlg.cpp b/compareDlg.cpp
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--- /dev/null
+++ b/compareDlg.cpp
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+/* $Id: compareDlg.cpp,v 1.8 2006/11/05 04:42:43 ganzhorn Exp $
+ * This file is part of lfhex.
+ * Copyright (C) 2006 Salem Ganzhorn <eyekode@yahoo.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <QLabel>
+#include <QLineEdit>
+#include <QCheckBox>
+#include <qlayout.h>
+#include <qpushbutton.h>
+#include <QToolBar>
+#include <qtoolbutton.h>
+#include <QFileDialog>
+#include <qwidget.h>
+#include <qapplication.h>
+#include <qmessagebox.h>
+#include <qcombobox.h>
+#include <qtabwidget.h>
+#include <QBitmap>
+#include <QVBoxLayout>
+
+#include "compareDlg.hpp"
+#include "offsetConstraint.hpp"
+#include "hexGui.hpp"
+#include "reader.hpp"
+#include "box.hpp"
+
+// icon images:
+#include "img/prev.xbm"
+#include "img/next.xbm"
+#include "img/last.xbm"
+#include "img/first.xbm"
+#include "img/exit.xbm"
+
+//extern QApplication * qApp;
+
+CompareDlg::CompareDlg(const char *file0,
+		       const char *file1,
+		       QWidget*parent)
+    : QMainWindow(parent)
+{
+  tabLayout = new QTabWidget(this);
+  setCentralWidget(tabLayout);
+
+  QWidget *options = new QWidget(tabLayout);
+  QVBoxLayout *optionLayout = new QVBoxLayout(options);
+
+  optionLayout->setMargin(3);
+  optionLayout->setSpacing(2);
+
+  // setup alignment entries:
+  offsetConstraint = new OffsetConstraint(options);
+  offsetConstraint->setTitle( "Constrain offset to X*n+Y" );
+  optionLayout->addWidget(offsetConstraint);
+  // setup cursor offsets
+  diffOffsets = new QCheckBox("Allow different file offsets",options);
+  optionLayout->addWidget(diffOffsets);
+  // add a dummy strechable widget for alignment.
+  optionLayout->addStretch(1);
+  connect(diffOffsets,SIGNAL(stateChanged(int)),
+	  this,SLOT(setAllowDiffOffsets(int)));
+  diffOffsets->setChecked(false);
+  setAllowDiffOffsets(false);
+
+  // setup toolbar 
+  QToolBar *tools = new QToolBar(this);
+/*  FIXME new QToolButton(QBitmap::fromData(QSize(exit_width,exit_height),exit_bits),
+		  "Exit","",qApp,SLOT(quit()),tools);
+  tools->addSeparator();
+  new QToolButton(QBitmap(first_width,first_height,first_bits,true),
+		  "First Difference","",this,SLOT(first()),tools);
+  new QToolButton(QBitmap(prev_width,prev_height,prev_bits,true),
+		  "Previous Difference","?",
+		  this,SLOT(prev()),tools);
+  new QToolButton(QBitmap(next_width,next_height,next_bits,true),
+		  "Next Difference","foo",
+		  this,SLOT(next()),tools);
+  new QToolButton(QBitmap(last_width,last_height,last_bits,true),
+		  "Last Difference","",this,SLOT(last()),tools);
+*/
+  // setup compare section
+  vbox* view = new vbox(tabLayout);
+
+  hexGui[0] = new HexGui(view);
+  hexGui[1] = new HexGui(view);
+  reader[0] = hexGui[0]->reader();
+  reader[1] = hexGui[1]->reader();
+  
+  if( file0 )
+    hexGui[0]->open(file0);
+  if( file1 )
+    hexGui[1]->open(file1);
+
+  tabLayout->addTab(view,"&Compare");
+  tabLayout->addTab(options,"&Options");
+  addToolBar(tools);
+  // request a size large enough for both hexEditors
+  resize(500,500);
+  setWindowTitle("Compare dialog");
+}
+
+bool CompareDlg::enabled()
+{
+  if( reader[0]->is_open() && reader[1]->is_open() ) {
+    // check to see if modified!!!
+    if( hexGui[0]->isModified() || hexGui[1]->isModified() ) {
+      QMessageBox::critical(this,PROGRAM_STRING,
+		  "Error, cannot use comparison"
+		  " functions on modified buffers.");
+      return false;
+    }
+    return true;
+  }
+
+  return false;
+}
+// public slots
+void CompareDlg::setAllowDiffOffsets(int state)
+{
+    //   diffOffsets->setChecked(state);
+}
+
+bool CompareDlg::first()
+{
+  if( !enabled() )
+    return false;
+  
+  // see Compare::last() for description of concept
+  off_t offset = offsetConstraint->next(0);
+  hexGui[0]->gotoOffset(offset);
+  hexGui[1]->gotoOffset(offset);
+  if( prev() )
+    return true;
+  hexGui[0]->gotoOffset(0);
+  hexGui[1]->gotoOffset(0);
+  return next();
+}
+
+bool CompareDlg::last()
+{
+  if( !enabled() ) 
+    return false;
+
+  // look at lastidx 's previous's next range
+  // prev(x) is garranteed to not contain x, and next(prev(x)) will contain x
+  off_t min_size_decr = min( reader[0]->size()-1,
+			     reader[1]->size()-1 );
+  off_t offset = offsetConstraint->prev( min_size_decr );
+  hexGui[0]->gotoOffset(offset);
+  hexGui[1]->gotoOffset(offset);
+  if( next() )
+    return true;
+  hexGui[0]->gotoOffset( min_size_decr );
+  hexGui[1]->gotoOffset( min_size_decr );
+  return prev();
+}
+
+bool CompareDlg::prev() 
+{
+  if( !enabled() )
+    return false;;
+  // find previous diff
+  off_t offset[2];
+  offset[0] = hexGui[0]->offset();
+  offset[1] = (diffOffsets->isChecked()) ? hexGui[1]->offset() : offset[0];
+  
+  if( offsetConstraint->getStride() > 1 ) {
+    off_t stop[2];
+    off_t pos[2];
+    for( pos[0] = offset[0] = offsetConstraint->prev(offset[0]), 
+	   pos[1] = offset[1] = offsetConstraint->prev(offset[1]);
+	 offset[0] >= 0 && offset[1] >= 0;
+	 pos[0] = offset[0] = offsetConstraint->prev(offset[0]),
+	   pos[1] = offset[1] = offsetConstraint->prev(offset[1])) {
+      
+      // calculate stop
+      stop[0] = offset[0]+offsetConstraint->getStride();
+      stop[1] = offset[1]+offsetConstraint->getStride();
+      
+      // ignore lookups on less than a full stride length
+      // this would only happen if the file size is less than the stride
+      if( stop[0] > reader[0]->size() || stop[1] > reader[1]->size() )
+	return false;
+
+      while( pos[0] < stop[0] ) {
+	if( (*reader[0])[pos[0]++] != (*reader[1])[pos[1]++] ) {
+	  // we have a difference
+	  hexGui[0]->setSelection(offset[0],stop[0]);
+	  hexGui[1]->setSelection(offset[1],stop[1]);
+	  hexGui[0]->gotoOffset(offset[0]);
+	  hexGui[1]->gotoOffset(offset[1]);
+	  return true;
+	}
+      }
+    }
+  } else {
+    // just go one char at a time
+
+    // make sure we are not past the eof of the second buffer
+    if( offset[1] >= reader[1]->size() )
+      return false;
+    if( offset[0] <= 0 || offset[1] <= 0 )
+      return false;
+    do {
+      offset[0]--;
+      offset[1]--;
+      
+      if( (*reader[0])[offset[0]] != (*reader[1])[offset[1]] ) {
+	hexGui[0]->gotoOffset(offset[0]);
+	hexGui[1]->gotoOffset(offset[1]);
+	hexGui[0]->setSelection(offset[0],offset[0]+1);
+	hexGui[1]->setSelection(offset[1],offset[1]+1);
+	return true;
+      }
+    } while( offset[0] > 0 && offset[1] > 0 );
+  }
+  return false;
+}
+
+bool CompareDlg::next() 
+{
+  // find next diff
+  if( !enabled() )
+    return false;
+
+  off_t offset[2];
+  offset[0] = hexGui[0]->offset();
+  offset[1] = (diffOffsets->isChecked()) ? hexGui[1]->offset() : offset[0];
+  
+  off_t size[2];
+  size[0] = reader[0]->size();
+  size[1] = reader[1]->size();
+  
+  if( offsetConstraint->getStride() > 1 ) {
+    off_t stop[2];
+    off_t pos[2];
+    for( pos[0] = offset[0] = offsetConstraint->next(offset[0]),
+	   pos[1] = offset[1] = offsetConstraint->next(offset[1]);
+	 offset[0] < size[0] && offset[1] < size[1];
+	 pos[0] = offset[0] = offsetConstraint->next( offset[0] ),
+	   pos[1] = offset[1] = offsetConstraint->next( offset[1] )) {
+      // compare from offset to offset+stride()
+      stop[0] = offset[0]+offsetConstraint->getStride();
+      stop[1] = offset[1]+offsetConstraint->getStride();
+      // if this will go past the bounds of the files, then the difference
+      // does not matter, ignore it.
+      if( stop[0] > size[0] || stop[1] > size[1] ) {
+	return false;
+      }
+      
+      while( pos[0] < stop[0] ) {
+	if( (*reader[0])[pos[0]++] != (*reader[1])[pos[1]++] ) {
+	  // we have a difference
+	  hexGui[0]->setSelection(offset[0],stop[0]);
+	  hexGui[1]->setSelection(offset[1],stop[1]);
+	  hexGui[0]->gotoOffset(offset[0]);
+	  hexGui[1]->gotoOffset(offset[1]);
+	  return true; // bail out of fn
+	}
+      }
+    }
+  } else {
+    // just go one at a time
+    if( offset[0] >= size[0] || offset[1] >= size[1] ) 
+      return false;
+    if( offset[0] < 0 || offset[1] < 0 ) 
+      return false;
+    offset[0]++;
+    offset[1]++;
+    while( offset[0] < size[0] && offset[1] < size[1] ) {
+      // don't compare the one we are on
+      if( (*reader[0])[offset[0]] != (*reader[1])[offset[1]] ) {
+	hexGui[0]->gotoOffset(offset[0]);
+	hexGui[1]->gotoOffset(offset[1]);
+	hexGui[0]->setSelection(offset[0],offset[0]+1);
+	hexGui[1]->setSelection(offset[1],offset[1]+1);
+	return true;
+      }
+      offset[0]++;
+      offset[1]++;
+    } 
+  }
+  return false;
+}