inmemorymapserver.cpp

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#include "inmemorymapserver.h"

#include "../clib/binaryfile.h"
#include "../clib/passert.h"
#include "mapblock.h"

namespace Pol
{
namespace Plib
{
InMemoryMapServer::InMemoryMapServer( const RealmDescriptor& descriptor ) : MapServer( descriptor )
{
  unsigned n_blocks =
      ( _descriptor.width >> MAPBLOCK_SHIFT ) * ( _descriptor.height >> MAPBLOCK_SHIFT );

  Clib::BinaryFile mapfile( descriptor.path( "base.dat" ), std::ios::in );

  _mapblocks.resize( n_blocks );

  mapfile.Read( &_mapblocks[0], n_blocks );
}

InMemoryMapServer::~InMemoryMapServer() = default;

MAPCELL InMemoryMapServer::GetMapCell( unsigned short x, unsigned short y ) const
{
  passert( x < _descriptor.width && y < _descriptor.height );

  unsigned short xblock = x >> MAPBLOCK_SHIFT;
  unsigned short xcell = x & MAPBLOCK_CELLMASK;
  unsigned short yblock = y >> MAPBLOCK_SHIFT;
  unsigned short ycell = y & MAPBLOCK_CELLMASK;

  int block_index = yblock * ( _descriptor.width >> MAPBLOCK_SHIFT ) + xblock;
  const MAPBLOCK& mapblock = _mapblocks[block_index];
  return mapblock.cell[xcell][ycell];
}

size_t InMemoryMapServer::sizeEstimate() const
{
  size_t size = sizeof( *this ) + MapServer::sizeEstimate();
  size += 3 * sizeof( MAPBLOCK* ) + _mapblocks.capacity() * sizeof( MAPBLOCK );
  return size;
}
}
}