qgswkbptr.cpp

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/***************************************************************************
    qgswkbptr.cpp
    ---------------------
    begin                : May 2015
    copyright            : (C) 2015 by Marco Hugentobler
    email                : marco dot hugentobler at sourcepole dot ch
 ***************************************************************************
 *                                                                         *
 *   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 "qgswkbptr.h"

QgsWkbPtr::QgsWkbPtr( unsigned char *p, int size )
{
  mP = p;
  mStart = mP;
  mEnd = mP + size;
}

void QgsWkbPtr::verifyBound( int size ) const
{
  if ( !mP || mP + size > mEnd )
    throw QgsWkbException( "wkb access out of bounds" );
}

QgsConstWkbPtr::QgsConstWkbPtr( const unsigned char *p, int size )
{
  mP = const_cast< unsigned char * >( p );
  mEnd = mP + size;
  mEndianSwap = false;
}

QgsWKBTypes::Type QgsConstWkbPtr::readHeader() const
{
  if ( !mP )
    return QgsWKBTypes::Unknown;

  char wkbEndian;
  *this >> wkbEndian;
  mEndianSwap = wkbEndian != QgsApplication::endian();

  int wkbType;
  *this >> wkbType;

  return static_cast<QgsWKBTypes::Type>( wkbType );
}

void QgsConstWkbPtr::verifyBound( int size ) const
{
  if ( !mP || mP + size > mEnd )
    throw QgsWkbException( "wkb access out of bounds" );
}