1 files changed, 272 insertions, 0 deletions
diff --git a/khexedit/lib/kfixedsizebuffer.cpp b/khexedit/lib/kfixedsizebuffer.cpp
new file mode 100644
index 0000000..2945620
--- /dev/null
+++ b/khexedit/lib/kfixedsizebuffer.cpp
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+/***************************************************************************
+                          kfixedsizebuffer.cpp  -  description
+                             -------------------
+    begin                : Mit Jun 03 2003
+    copyright            : (C) 2003 by Friedrich W. H. Kossebau
+    email                : Friedrich.W.H@Kossebau.de
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License version 2 as published by the Free Software Foundation.       *
+ *                                                                         *
+ ***************************************************************************/
+
+//#include <kdebug.h>
+// c specific
+#include <string.h>
+// lib specific
+#include "kfixedsizebuffer.h"
+
+using namespace KHE;
+
+KFixedSizeBuffer::KFixedSizeBuffer( char *D, unsigned int S, char FUC )
+  : Data( D ),
+   Size( S ),
+   FillUpChar( FUC ),
+   ReadOnly( true ),
+   Modified( false ),
+   AutoDelete( false )
+{
+}
+
+KFixedSizeBuffer::KFixedSizeBuffer( unsigned int S, char FUC )
+  : Data( new char[S] ),
+   Size( S ),
+   FillUpChar( FUC ),
+   ReadOnly( false ),
+   Modified( false ),
+   AutoDelete( true )
+{
+  reset( 0, S );
+}
+
+KFixedSizeBuffer::~KFixedSizeBuffer()
+{
+  if( AutoDelete )
+    delete [] Data;
+}
+
+
+
+int KFixedSizeBuffer::insert( int Pos, const char* D, int InputLength )
+{
+  // check all parameters
+  if( Pos >= (int)Size || InputLength == 0 )
+    return 0;
+  if( Pos + InputLength > (int)Size )
+    InputLength = Size - Pos;
+
+  unsigned int BehindInsertPos = Pos + InputLength;
+  // fmove right data behind the input range
+  memmove( &Data[BehindInsertPos], &Data[Pos], Size-BehindInsertPos );
+  // insert input
+  memcpy( &Data[Pos], D, InputLength );
+
+  Modified = true;
+  return InputLength;
+}
+
+
+int KFixedSizeBuffer::remove( KSection Remove )
+{
+  if( Remove.start() >= (int)Size || Remove.width() == 0 )
+    return 0;
+
+  Remove.restrictEndTo( Size-1 );
+
+  int RemoveLength = Remove.width();
+  int BehindRemovePos = Remove.end()+1;;
+  // fmove right data behind the input range
+  memmove( &Data[Remove.start()], &Data[BehindRemovePos], Size-BehindRemovePos );
+  // clear freed space
+  reset( Size-RemoveLength, RemoveLength );
+
+  Modified = true;
+  return RemoveLength;
+}
+
+
+unsigned int KFixedSizeBuffer::replace( KSection Remove, const char* D, unsigned int InputLength )
+{
+  // check all parameters
+  if( Remove.startsBehind( Size-1 ) || (Remove.width()==0 && InputLength==0) )
+    return 0;
+
+  Remove.restrictEndTo( Size-1 );
+  if( Remove.start() + InputLength > Size )
+    InputLength = Size - Remove.start();
+
+  int SizeDiff = InputLength - Remove.width();
+
+  // is input longer than removed?
+  if( SizeDiff > 0 )
+  {
+    unsigned int BehindInsertPos = Remove.start() + InputLength;
+    // fmove right data behind the input range
+    memmove( &Data[BehindInsertPos], &Data[Remove.end()+1], Size-BehindInsertPos );
+  }
+  // is input smaller than removed?
+  else if( SizeDiff < 0 )
+  {
+    unsigned int BehindRemovePos = Remove.end()+1;
+    // fmove right data behind the input range
+    memmove( &Data[Remove.start()+InputLength], &Data[BehindRemovePos], Size-BehindRemovePos );
+   // clear freed space
+    reset( Size+SizeDiff, -SizeDiff );
+  }
+  // insert input
+  memcpy( &Data[Remove.start()], D, InputLength );
+
+  Modified = true;
+  return InputLength;
+}
+
+
+int KFixedSizeBuffer::move( int DestPos, KSection SourceSection )
+{
+  // check all parameters
+  if( SourceSection.start() >= (int)Size || SourceSection.width() == 0
+      || DestPos > (int)Size || SourceSection.start() == DestPos )
+    return SourceSection.start();
+
+  SourceSection.restrictEndTo( Size-1 );
+  bool ToRight = DestPos > SourceSection.start();
+  int MovedLength = SourceSection.width();
+  int DisplacedLength = ToRight ?  DestPos - SourceSection.end()-1 : SourceSection.start() - DestPos;
+
+  // find out section that is smaller
+  int SmallPartLength, LargePartLength, SmallPartStart, LargePartStart, SmallPartDest, LargePartDest;
+  // moving part is smaller?
+  if( MovedLength < DisplacedLength )
+  {
+    SmallPartStart = SourceSection.start();
+    SmallPartLength = MovedLength;
+    LargePartLength = DisplacedLength;
+    // moving part moves right?
+    if( ToRight )
+    {
+      SmallPartDest = DestPos - MovedLength;
+      LargePartStart = SourceSection.end()+1;
+      LargePartDest = SourceSection.start();
+    }
+    else
+    {
+      SmallPartDest = DestPos;
+      LargePartStart = DestPos;
+      LargePartDest = DestPos + MovedLength;
+    }
+  }
+  else
+  {
+    LargePartStart = SourceSection.start();
+    LargePartLength = MovedLength;
+    SmallPartLength = DisplacedLength;
+    // moving part moves right?
+    if( ToRight )
+    {
+      LargePartDest = DestPos - MovedLength;
+      SmallPartStart = SourceSection.end()+1;
+      SmallPartDest = SourceSection.start();
+    }
+    else
+    {
+      LargePartDest = DestPos;
+      SmallPartStart = DestPos;
+      SmallPartDest = DestPos + MovedLength;
+    }
+  }
+
+  // copy smaller part to tempbuffer
+  char *Temp = new char[SmallPartLength];
+  memcpy( Temp, &Data[SmallPartStart], SmallPartLength );
+
+  // move the larger part
+  memmove( &Data[LargePartDest], &Data[LargePartStart], LargePartLength );
+
+  // copy smaller part to its new dest
+  memcpy( &Data[SmallPartDest], Temp, SmallPartLength );
+  delete [] Temp;
+
+  Modified = true;
+  return MovedLength < DisplacedLength ? SmallPartDest : LargePartDest;
+}
+
+
+int KFixedSizeBuffer::fill( const char FChar, int FillLength, unsigned int Pos )
+{
+  // nothing to fill
+  if( Pos >= Size )
+    return 0;
+
+  unsigned int LengthToEnd = Size - Pos;
+
+  if( FillLength < 0 || FillLength > (int)LengthToEnd )
+    FillLength = LengthToEnd;
+
+  memset( &Data[Pos], FChar, FillLength );
+  Modified = true;
+  return FillLength;
+}
+
+
+int KFixedSizeBuffer::compare( const KDataBuffer &Other, KSection OtherRange, unsigned int Pos )
+{
+  //kdDebug() << QString("Pos: %1, OtherRange: (%3/%4)" ).arg(Pos).arg(OtherRange.start()).arg(OtherRange.end())
+  //    << endl;
+  // test other values
+  if( OtherRange.startsBehind(Other.size()-1) )
+    return 1;
+
+  // check own values
+  if( Pos >= Size )
+    return -1;
+
+  int ValueByLength = 0; // default: equal
+
+  KSection Range( Pos, OtherRange.width(), true );
+  int Last = Other.size()-1;
+  // 
+  if( OtherRange.endsBehind(Last) )
+  {
+    // make shorter
+    OtherRange.setEnd( Last );
+    if( OtherRange.width() < Range.width() )
+      ValueByLength = 1;
+  }
+  Last = Size-1;
+  if( Range.endsBehind(Last) )
+  {
+    // make shorter
+    Range.setEnd( Last );
+    if( OtherRange.width() > Range.width() )
+      ValueByLength = -1;
+  }
+  //kdDebug()
+  //    << QString( "Range: (%1/%2), OtherRange: (%3/%4)" ).arg(Range.start()).arg(Range.end()).arg(OtherRange.start()).arg(OtherRange.end())
+  //    << endl;
+  int oi = OtherRange.start();
+  for( int i=Range.start(); i<=Range.end(); ++i,++oi )
+  {
+    char OD = Other.datum(oi);
+    char D = Data[i];
+    //kdDebug() << QString("%1==%2").arg((int)D).arg((int)OD) << endl;
+    if( OD == D )
+      continue;
+    return OD < D ? 1 : -1;
+  }
+
+  return ValueByLength;
+}
+
+
+int KFixedSizeBuffer::find(  const char*/*KeyData*/, int /*Length*/, KSection /*Section*/  ) const { return 0; }
+int KFixedSizeBuffer::rfind( const char*, int /*Length*/, int /*Pos*/ ) const { return 0; }
+
+
+void KFixedSizeBuffer::reset( unsigned int Pos, unsigned int Length )
+{
+  memset( &Data[Pos], FillUpChar, Length );
+}