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source: code/trunk/src/libraries/network/packet/Gamestate.cc @ 11534

Last change on this file since 11534 was 11083, checked in by muemart, 9 years ago

Fix some clang-tidy warnings.
Also, Serialise.h was doing some C-style casts that ended up being const casts. I moved those const casts as close to the source as possible and changed the loadAndIncrease functions to not do that.

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1/*
2 *   ORXONOX - the hottest 3D action shooter ever to exist
3 *                    > www.orxonox.net <
4 *
5 *
6 *   License notice:
7 *
8 *   This program is free software; you can redistribute it and/or
9 *   modify it under the terms of the GNU General Public License
10 *   as published by the Free Software Foundation; either version 2
11 *   of the License, or (at your option) any later version.
12 *
13 *   This program is distributed in the hope that it will be useful,
14 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 *   GNU General Public License for more details.
17 *
18 *   You should have received a copy of the GNU General Public License
19 *   along with this program; if not, write to the Free Software
20 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
21 *
22 *   Author:
23 *      Oliver Scheuss
24 *   Co-authors:
25 *      ...
26 *
27 */
28
29#include "Gamestate.h"
30
31#include <zlib.h>
32
33#include "util/Output.h"
34#include "util/OrxAssert.h"
35#include "core/CoreIncludes.h"
36#include "core/GameMode.h"
37#include "core/object/ObjectList.h"
38#include "network/synchronisable/Synchronisable.h"
39#include "network/GamestateHandler.h"
40#include "network/Host.h"
41
42namespace orxonox {
43
44namespace packet {
45
46#define GAMESTATE_START(data) (data + GamestateHeader::getSize())
47
48// #define PACKET_FLAG_GAMESTATE  PacketFlag::Reliable
49#define PACKET_FLAG_GAMESTATE  0
50
51inline bool memzero( uint8_t* data, uint32_t datalength)
52{
53  uint64_t* d = (uint64_t*)data;
54
55  for( unsigned int i=0; i<datalength/8; i++ )
56  {
57    if( *(d+i) != 0 )
58      return false;
59  }
60  // now process the rest (when datalength isn't a multiple of 4)
61  for( unsigned int j = 8*(datalength/8); j<datalength; j++ )
62  {
63    if( *(data+j) != 0 )
64      return false;
65  }
66  return true;
67}
68
69
70Gamestate::Gamestate():
71  header_()
72{
73  flags_ = flags_ | PACKET_FLAG_GAMESTATE;
74}
75
76
77Gamestate::Gamestate(uint8_t *data, unsigned int clientID):
78  Packet(data, clientID), header_(data)
79{
80  flags_ = flags_ | PACKET_FLAG_GAMESTATE;
81}
82
83
84Gamestate::Gamestate(uint8_t *data):
85  header_(data)
86{
87  flags_ = flags_ | PACKET_FLAG_GAMESTATE;
88  data_ = data;
89}
90
91
92Gamestate::Gamestate(const Gamestate& g) :
93  Packet( *(Packet*)&g ), header_(this->data_), nrOfVariables_(0)
94{
95  flags_ = flags_ | PACKET_FLAG_GAMESTATE;
96  sizes_ = g.sizes_;
97}
98
99
100Gamestate::~Gamestate()
101{
102}
103
104
105bool Gamestate::collectData(int id, uint8_t mode)
106{
107  uint32_t tempsize=0, currentsize=0;
108  assert(data_==nullptr);
109  uint32_t size = calcGamestateSize(id, mode);
110
111  orxout(verbose_more, context::packets) << "G.ST.Man: producing gamestate with id: " << id << endl;
112  if(size==0)
113    return false;
114  data_ = new uint8_t[size + GamestateHeader::getSize()];
115  if(!data_)
116  {
117    orxout(internal_warning, context::packets) << "GameStateManager: could not allocate memory" << endl;
118    return false;
119  }
120
121  // tell the gamestate header where to store the data
122  header_.setData(this->data_);
123
124  //start collect data synchronisable by synchronisable
125  uint8_t *mem = data_; // in this stream store all data of the variables and the headers of the synchronisable
126  mem += GamestateHeader::getSize();
127  ObjectList<Synchronisable>::iterator it;
128  for(it = ObjectList<Synchronisable>().begin(); it; ++it)
129  {
130
131//     tempsize=it->getSize(id, mode);
132
133    tempsize = it->getData(mem, this->sizes_, id, mode);
134    if ( tempsize != 0 )
135      dataVector_.emplace_back(it->getObjectID(), it->getContextID(), tempsize, mem-data_);
136
137#ifndef NDEBUG
138    if(currentsize+tempsize > size)
139    {
140      assert(0); // if we don't use multithreading this part shouldn't be neccessary
141      // start allocate additional memory
142      orxout(internal_info, context::packets) << "Gamestate: need additional memory" << endl;
143      ObjectList<Synchronisable>::iterator temp = it;
144      uint32_t addsize=tempsize;
145      while(++temp)
146        addsize+=temp->getSize(id, mode);
147      data_ = (uint8_t *)realloc(data_, GamestateHeader::getSize() + currentsize + addsize);
148      if(!data_)
149        return false;
150      size = currentsize+addsize;
151    }// stop allocate additional memory
152#endif
153//     if(!it->getData(mem, id, mode))
154//       return false; // mem pointer gets automatically increased because of call by reference
155    // increase size counter by size of current synchronisable
156    currentsize+=tempsize;
157  }
158
159
160  //start write gamestate header
161  header_.setDataSize( currentsize );
162  header_.setCompSize( 0 );
163  header_.setID( id );
164  header_.setBaseID( GAMESTATEID_INITIAL );
165  header_.setDiffed( false );
166  header_.setComplete( true );
167  header_.setCompressed( false );
168  //stop write gamestate header
169
170  orxout(verbose_more, context::packets) << "Gamestate: Gamestate size: " << currentsize << endl;
171  orxout(verbose_more, context::packets) << "Gamestate: 'estimated' (and corrected) Gamestate size: " << size << endl;
172  return true;
173}
174
175
176bool Gamestate::spreadData(uint8_t mode)
177{
178  orxout(verbose_more, context::packets) << "processing gamestate with id " << header_.getID() << endl;
179  assert(data_);
180  assert(!header_.isCompressed());
181  uint8_t *mem=data_+GamestateHeader::getSize();
182  Synchronisable *s;
183 
184  // update the data of the objects we received
185  while(mem < data_+GamestateHeader::getSize()+header_.getDataSize())
186  {
187    SynchronisableHeader objectheader(mem);
188
189    s = Synchronisable::getSynchronisable( objectheader.getObjectID() );
190    if(!s)
191    {
192      if (!GameMode::isMaster())
193      {
194        Synchronisable::fabricate(mem, mode);
195      }
196      else
197      {
198//         orxout(verbose, context::packets) << "not creating object of classid " << objectheader.getClassID() << endl;
199        mem += objectheader.getDataSize() + ( objectheader.isDiffed() ? SynchronisableHeaderLight::getSize() : SynchronisableHeader::getSize() );
200      }
201    }
202    else
203    {
204//       orxout(verbose, context::packets) << "updating object of classid " << objectheader.getClassID() << endl;
205      OrxVerify(s->updateData(mem, mode), "ERROR: could not update Synchronisable with Gamestate data");
206    }
207  }
208  assert((uintptr_t)(mem-data_) == GamestateHeader::getSize()+header_.getDataSize());
209 
210   // In debug mode, check first, whether there are no duplicate objectIDs
211#ifndef NDEBUG
212  if(this->getID()%1000==1)
213  {
214    std::list<uint32_t> v1;
215    for (Synchronisable* synchronisable : ObjectList<Synchronisable>())
216    {
217      if (synchronisable->getObjectID() == OBJECTID_UNKNOWN)
218      {
219        if (synchronisable->objectMode_ != 0x0)
220        {
221          orxout(user_error, context::packets) << "Found object with OBJECTID_UNKNOWN on the client with objectMode != 0x0!" << endl;
222          orxout(user_error, context::packets) << "Possible reason for this error: Client created a synchronized object without the Server's approval." << endl;
223          orxout(user_error, context::packets) << "Objects class: " << synchronisable->getIdentifier()->getName() << endl;
224          assert(false);
225        }
226      }
227      else
228      {
229        for (uint32_t id : v1)
230        {
231          if (synchronisable->getObjectID() == id)
232          {
233            orxout(user_error, context::packets) << "Found duplicate objectIDs on the client!" << endl
234                                                 << "Are you sure you don't create a Sychnronisable objcect with 'new' \
235                                                     that doesn't have objectMode = 0x0?" << endl;
236            assert(false);
237          }
238        }
239        v1.push_back(synchronisable->getObjectID());
240      }
241    }
242  }
243#endif
244  return true;
245}
246
247
248uint32_t Gamestate::getSize() const
249{
250  assert(data_);
251  if(header_.isCompressed())
252    return header_.getCompSize()+GamestateHeader::getSize();
253  else
254  {
255    return header_.getDataSize()+GamestateHeader::getSize();
256  }
257}
258
259
260bool Gamestate::operator==(packet::Gamestate gs)
261{
262  uint8_t *d1 = data_+GamestateHeader::getSize();
263  uint8_t *d2 = gs.data_+GamestateHeader::getSize();
264  GamestateHeader h1(data_);
265  GamestateHeader h2(gs.data_);
266  assert(h1.getDataSize() == h2.getDataSize());
267  assert(!isCompressed());
268  assert(!gs.isCompressed());
269  return memcmp(d1, d2, h1.getDataSize())==0;
270}
271
272
273bool Gamestate::process(orxonox::Host* host)
274{
275  return host->addGamestate(this, getPeerID());
276}
277
278
279bool Gamestate::compressData()
280{
281  assert(data_);
282  assert(!header_.isCompressed());
283  uLongf buffer = (uLongf)(((header_.getDataSize() + 12)*1.01)+1);
284  if(buffer==0)
285    return false;
286
287  uint8_t *ndata = new uint8_t[buffer+GamestateHeader::getSize()];
288  uint8_t *dest = ndata + GamestateHeader::getSize();
289  uint8_t *source = data_ + GamestateHeader::getSize();
290  int retval;
291  retval = compress( dest, &buffer, source, (uLong)(header_.getDataSize()) );
292  switch ( retval )
293  {
294    case Z_OK: orxout(verbose_more, context::packets) << "G.St.Man: compress: successfully compressed" << endl; break;
295    case Z_MEM_ERROR: orxout(internal_error, context::packets) << "G.St.Man: compress: not enough memory available in gamestate.compress" << endl; return false;
296    case Z_BUF_ERROR: orxout(internal_warning, context::packets) << "G.St.Man: compress: not enough memory available in the buffer in gamestate.compress" << endl; return false;
297    case Z_DATA_ERROR: orxout(internal_warning, context::packets) << "G.St.Man: compress: data corrupted in gamestate.compress" << endl; return false;
298  }
299
300  //copy and modify header
301  GamestateHeader *temp = new GamestateHeader(data_);
302  header_.setData(ndata);
303  header_ = *temp;
304  delete temp;
305  //delete old data
306  delete[] data_;
307  //save new data
308  data_ = ndata;
309  header_.setCompSize( buffer );
310  header_.setCompressed( true );
311  orxout(verbose, context::packets) << "gamestate compress datasize: " << header_.getDataSize() << " compsize: " << header_.getCompSize() << endl;
312  return true;
313}
314
315
316bool Gamestate::decompressData()
317{
318  assert(data_);
319  assert(header_.isCompressed());
320  orxout(verbose, context::packets) << "GameStateClient: uncompressing gamestate. id: " << header_.getID() << ", baseid: " << header_.getBaseID() << ", datasize: " << header_.getDataSize() << ", compsize: " << header_.getCompSize() << endl;
321  uint32_t datasize = header_.getDataSize();
322  uint32_t compsize = header_.getCompSize();
323  uint32_t bufsize;
324  bufsize = datasize;
325  assert(bufsize!=0);
326  uint8_t *ndata = new uint8_t[bufsize + GamestateHeader::getSize()];
327  uint8_t *dest = ndata + GamestateHeader::getSize();
328  uint8_t *source = data_ + GamestateHeader::getSize();
329  int retval;
330  uLongf length=bufsize;
331  retval = uncompress( dest, &length, source, (uLong)compsize );
332  switch ( retval )
333  {
334    case Z_OK: orxout(verbose_more, context::packets) << "successfully decompressed" << endl; break;
335    case Z_MEM_ERROR: orxout(internal_error, context::packets) << "not enough memory available" << endl; return false;
336    case Z_BUF_ERROR: orxout(internal_warning, context::packets) << "not enough memory available in the buffer" << endl; return false;
337    case Z_DATA_ERROR: orxout(internal_warning, context::packets) << "data corrupted (zlib)" << endl; return false;
338  }
339
340  //copy over the header
341  GamestateHeader* temp = new GamestateHeader( data_ );
342  header_.setData(ndata);
343  header_ = *temp;
344  delete temp;
345
346  if (this->bDataENetAllocated_)
347  {
348    // Memory was allocated by ENet. --> We let it be since enet_packet_destroy will
349    // deallocated it anyway. So data and packet stay together.
350    this->bDataENetAllocated_ = false;
351  }
352  else
353  {
354    // We allocated the memory in the first place (unlikely). So we destroy the old data
355    // and overwrite it with the new decompressed data.
356    delete[] this->data_;
357  }
358
359  //set new pointers
360  data_ = ndata;
361  header_.setCompressed( false );
362  assert(header_.getDataSize()==datasize);
363  assert(header_.getCompSize()==compsize);
364  return true;
365}
366
367
368inline void /*Gamestate::*/diffObject( uint8_t*& newDataPtr, uint8_t*& origDataPtr, uint8_t*& baseDataPtr, SynchronisableHeader& objectHeader, std::vector<uint32_t>::iterator& sizes )
369{
370  assert( objectHeader.getDataSize() == SynchronisableHeader(baseDataPtr).getDataSize() );
371 
372  uint32_t objectOffset = SynchronisableHeader::getSize(); // offset inside the object in the origData and baseData
373  // Check whether the whole object stayed the same
374  if( memcmp( origDataPtr+objectOffset, baseDataPtr+objectOffset, objectHeader.getDataSize()) == 0 )
375  {
376//     orxout(verbose, context::packets) << "skip object " << Synchronisable::getSynchronisable(objectHeader.getObjectID())->getIdentifier()->getName() << endl;
377    origDataPtr += objectOffset + objectHeader.getDataSize(); // skip the whole object
378    baseDataPtr += objectOffset + objectHeader.getDataSize();
379    sizes += Synchronisable::getSynchronisable(objectHeader.getObjectID())->getNrOfVariables();
380  }
381  else
382  {
383    // Now start to diff the Object
384    SynchronisableHeaderLight newObjectHeader(newDataPtr);
385    newObjectHeader = objectHeader; // copy over the objectheader
386    VariableID variableID = 0;
387    uint32_t diffedObjectOffset = SynchronisableHeaderLight::getSize();
388    // iterate through all variables
389    while( objectOffset < objectHeader.getDataSize()+SynchronisableHeader::getSize() )
390    {
391      // check whether variable changed and write id and copy over variable to the new stream
392      // otherwise skip variable
393      uint32_t varSize = *sizes;
394      assert( varSize == Synchronisable::getSynchronisable(objectHeader.getObjectID())->getVarSize(variableID) );
395      if ( varSize != 0 )
396      {
397        if ( memcmp(origDataPtr+objectOffset, baseDataPtr+objectOffset, varSize) != 0 )
398        {
399          *(VariableID*)(newDataPtr+diffedObjectOffset) = variableID; // copy over the variableID
400          diffedObjectOffset += sizeof(VariableID);
401          memcpy( newDataPtr+diffedObjectOffset, origDataPtr+objectOffset, varSize );
402          diffedObjectOffset += varSize;
403          objectOffset += varSize;
404        }
405        else
406        {
407          objectOffset += varSize;
408        }
409      }
410
411      ++variableID;
412      ++sizes;
413    }
414   
415    // if there are variables from this object with 0 size left in sizes
416    if( Synchronisable::getSynchronisable(objectHeader.getObjectID())->getNrOfVariables() != variableID )
417      sizes += Synchronisable::getSynchronisable(objectHeader.getObjectID())->getNrOfVariables() - variableID;
418   
419    newObjectHeader.setDiffed(true);
420    newObjectHeader.setDataSize(diffedObjectOffset-SynchronisableHeaderLight::getSize());
421    assert(objectOffset == objectHeader.getDataSize()+SynchronisableHeader::getSize());
422    assert(newObjectHeader.getDataSize()>0);
423   
424    origDataPtr += objectOffset;
425    baseDataPtr += objectOffset;
426    newDataPtr += diffedObjectOffset;
427  }
428}
429
430inline void /*Gamestate::*/copyObject( uint8_t*& newData, uint8_t*& origData, uint8_t*& baseData, SynchronisableHeader& objectHeader, std::vector<uint32_t>::iterator& sizes )
431{
432  //       orxout(verbose, context::packets) << "docopy" << endl;
433  // Just copy over the whole Object
434  memcpy( newData, origData, objectHeader.getDataSize()+SynchronisableHeader::getSize() );
435  SynchronisableHeader(newData).setDiffed(false);
436 
437  newData += objectHeader.getDataSize()+SynchronisableHeader::getSize();
438  origData += objectHeader.getDataSize()+SynchronisableHeader::getSize();
439//   SynchronisableHeader baseHeader( baseData );
440//   baseData += baseHeader.getDataSize()+SynchronisableHeader::getSize();
441  //       orxout(verbose, context::packets) << "copy " << h.getObjectID() << endl;
442  //       orxout(verbose, context::packets) << "copy " << h.getObjectID() << ":";
443  sizes += Synchronisable::getSynchronisable(objectHeader.getObjectID())->getNrOfVariables();
444//   for( unsigned int i = 0; i < Synchronisable::getSynchronisable(objectHeader.getObjectID())->getNrOfVariables(); ++i )
445//   {
446//     //         orxout(verbose, context::packets) << " " << *sizes;
447//     ++sizes;
448//   }
449    //       orxout(verbose, context::packets) << endl;
450}
451
452inline bool findObject(uint8_t*& dataPtr, uint8_t* endPtr, SynchronisableHeader& objectHeader)
453{
454  // Some assertions to make sure the dataPtr is valid (pointing to a SynchronisableHeader)
455  {
456    SynchronisableHeader htemp2(dataPtr);
457    assert(htemp2.getClassID()<500);
458    assert(htemp2.getDataSize()!=0 && htemp2.getDataSize()<1000);
459    assert(htemp2.isDiffed()==false);
460  }
461  uint32_t objectID = objectHeader.getObjectID();
462  while ( dataPtr < endPtr )
463  {
464    SynchronisableHeader htemp(dataPtr);
465    assert( htemp.getDataSize()!=0 );
466    if ( htemp.getObjectID() == objectID )
467    {
468      assert( objectHeader.getClassID() == htemp.getClassID() );
469      assert( objectHeader.getContextID() == htemp.getContextID() );
470      return true;
471    }
472    {
473      if( dataPtr+htemp.getDataSize()+SynchronisableHeader::getSize() < endPtr )
474      {
475        SynchronisableHeader htemp2(dataPtr+htemp.getDataSize()+SynchronisableHeader::getSize());
476        assert(htemp2.getClassID()<500);
477        assert(htemp2.getDataSize()!=0 && htemp2.getDataSize()<1000);
478        assert(htemp2.isDiffed()==false);
479      }
480    }
481    dataPtr += htemp.getDataSize()+SynchronisableHeader::getSize();
482   
483  }
484  assert(dataPtr == endPtr);
485 
486  return false;
487}
488
489Gamestate* Gamestate::diffVariables(Gamestate *base)
490{
491  assert(base); assert(data_ && base->data_);
492  assert(!header_.isCompressed() && !base->header_.isCompressed());
493  assert(!header_.isDiffed());
494  assert( header_.getDataSize() && base->header_.getDataSize() );
495
496
497  // *** first do a raw diff of the two gamestates
498
499  uint8_t *baseDataPtr = GAMESTATE_START(base->data_);
500  uint8_t *origDataPtr = GAMESTATE_START(this->data_);
501  uint8_t *origDataEnd = origDataPtr + header_.getDataSize();
502  uint8_t *baseDataEnd = baseDataPtr + base->header_.getDataSize();
503//   uint32_t origLength = header_.getDataSize();
504//   uint32_t baseLength = base->header_.getDataSize();
505
506  // Allocate new space for diffed gamestate
507  uint32_t newDataSize = header_.getDataSize() + GamestateHeader::getSize() + sizeof(uint32_t)*this->nrOfVariables_;
508  uint8_t *newData = new uint8_t[newDataSize]; // this is the maximum size needed in the worst case
509  uint8_t *destDataPtr = GAMESTATE_START(newData);
510
511  std::vector<uint32_t>::iterator sizesIt = this->sizes_.begin();
512
513  while( origDataPtr < origDataEnd )
514  {
515    //iterate through all objects
516
517    SynchronisableHeader origHeader(origDataPtr);
518
519    // Find (if possible) the current object in the datastream of the old gamestate
520    // Start at the current offset position
521    if(baseDataPtr == baseDataEnd)
522      baseDataPtr = GAMESTATE_START(base->data_);
523    uint8_t* oldBaseDataPtr = baseDataPtr;
524   
525    assert(baseDataPtr < baseDataEnd);
526    assert(destDataPtr < newData + newDataSize);
527    assert(sizesIt != this->sizes_.end());
528   
529    assert(Synchronisable::getSynchronisable(origHeader.getObjectID()));
530    assert(ClassByID(origHeader.getClassID()));
531    assert(origHeader.getDataSize() < 500);
532   
533    if( findObject(baseDataPtr, baseDataEnd, origHeader) )
534    {
535      SynchronisableHeader baseHeader(baseDataPtr);
536      assert(Synchronisable::getSynchronisable(baseHeader.getObjectID()));
537      assert(ClassByID(baseHeader.getClassID()));
538      assert(baseHeader.getDataSize() < 500);
539      if( SynchronisableHeader(baseDataPtr).getDataSize()==origHeader.getDataSize() )
540      {
541//         orxout(verbose, context::packets) << "diffing object in order: " << Synchronisable::getSynchronisable(origHeader.getObjectID())->getIdentifier()->getName() << endl;
542        diffObject(destDataPtr, origDataPtr, baseDataPtr, origHeader, sizesIt);
543      }
544      else
545      {
546//         orxout(verbose, context::packets) << "copy object because of different data sizes (1): " << Synchronisable::getSynchronisable(origHeader.getObjectID())->getIdentifier()->getName() << endl;
547        copyObject(destDataPtr, origDataPtr, baseDataPtr, origHeader, sizesIt);
548        assert(sizesIt != this->sizes_.end() || origDataPtr==origDataEnd);
549      }
550       
551    }
552    else
553    {
554      assert( baseDataPtr == baseDataEnd );
555      baseDataPtr = GAMESTATE_START(base->data_);
556      if( findObject(baseDataPtr, oldBaseDataPtr, origHeader) )
557      {
558        SynchronisableHeader baseHeader(baseDataPtr);
559        assert(Synchronisable::getSynchronisable(baseHeader.getObjectID()));
560        assert(ClassByID(baseHeader.getClassID()));
561        assert(baseHeader.getDataSize() < 500);
562        if( SynchronisableHeader(baseDataPtr).getDataSize()==origHeader.getDataSize() )
563        {
564//           orxout(verbose, context::packets) << "diffing object out of order: " << Synchronisable::getSynchronisable(origHeader.getObjectID())->getIdentifier()->getName() << endl;
565          diffObject(destDataPtr, origDataPtr, baseDataPtr, origHeader, sizesIt);
566        }
567        else
568        {
569//           orxout(verbose, context::packets) << "copy object because of different data sizes (2): " << Synchronisable::getSynchronisable(origHeader.getObjectID())->getIdentifier()->getName() << endl;
570          copyObject(destDataPtr, origDataPtr, baseDataPtr, origHeader, sizesIt);
571          assert(sizesIt != this->sizes_.end() || origDataPtr==origDataEnd);
572        }
573      }
574      else
575      {
576//         orxout(verbose, context::packets) << "copy object: " << Synchronisable::getSynchronisable(origHeader.getObjectID())->getIdentifier()->getName() << endl;
577        assert(baseDataPtr == oldBaseDataPtr);
578        copyObject(destDataPtr, origDataPtr, baseDataPtr, origHeader, sizesIt);
579        assert(sizesIt != this->sizes_.end() || origDataPtr==origDataEnd);
580      }
581    }
582  }
583  assert(sizesIt==this->sizes_.end());
584
585
586  Gamestate *g = new Gamestate(newData, getPeerID());
587  (g->header_) = header_;
588  g->header_.setBaseID( base->getID() );
589  g->header_.setDataSize(destDataPtr - newData - GamestateHeader::getSize());
590  g->flags_=flags_;
591  g->packetDirection_ = packetDirection_;
592  assert(!g->isCompressed());
593  return g;
594}
595
596
597/*Gamestate* Gamestate::diffData(Gamestate *base)
598{
599  assert(this && base); assert(data_ && base->data_);
600  assert(!header_.isCompressed() && !base->header_.isCompressed());
601  assert(!header_.isDiffed());
602
603  uint8_t *basep = GAMESTATE_START(base->data_);
604  uint8_t *gs = GAMESTATE_START(this->data_);
605  uint32_t dest_length = header_.getDataSize();
606
607  if(dest_length==0)
608    return nullptr;
609
610  uint8_t *ndata = new uint8_t[dest_length*sizeof(uint8_t)+GamestateHeader::getSize()];
611  uint8_t *dest = GAMESTATE_START(ndata);
612
613  rawDiff( dest, gs, basep, header_.getDataSize(), base->header_.getDataSize() );
614#ifndef NDEBUG
615  uint8_t *dest2 = new uint8_t[dest_length];
616  rawDiff( dest2, dest, basep, header_.getDataSize(), base->header_.getDataSize() );
617  assert( memcmp( dest2, gs, dest_length) == 0 );
618  delete dest2;
619#endif
620
621  Gamestate *g = new Gamestate(ndata, getClientID());
622  assert(g->header_);
623  *(g->header_) = *header_;
624  g->header_.setDiffed( true );
625  g->header_.setBaseID( base->getID() );
626  g->flags_=flags_;
627  g->packetDirection_ = packetDirection_;
628  assert(g->isDiffed());
629  assert(!g->isCompressed());
630  return g;
631}
632
633
634Gamestate* Gamestate::undiff(Gamestate *base)
635{
636  assert(this && base); assert(data_ && base->data_);
637  assert(!header_.isCompressed() && !base->header_.isCompressed());
638  assert(header_.isDiffed());
639
640  uint8_t *basep = GAMESTATE_START(base->data_);
641  uint8_t *gs = GAMESTATE_START(this->data_);
642  uint32_t dest_length = header_.getDataSize();
643
644  if(dest_length==0)
645    return nullptr;
646
647  uint8_t *ndata = new uint8_t[dest_length*sizeof(uint8_t)+GamestateHeader::getSize()];
648  uint8_t *dest = ndata + GamestateHeader::getSize();
649
650  rawDiff( dest, gs, basep, header_.getDataSize(), base->header_.getDataSize() );
651
652  Gamestate *g = new Gamestate(ndata, getClientID());
653  assert(g->header_);
654  *(g->header_) = *header_;
655  g->header_.setDiffed( false );
656  g->flags_=flags_;
657  g->packetDirection_ = packetDirection_;
658  assert(!g->isDiffed());
659  assert(!g->isCompressed());
660  return g;
661}
662
663
664void Gamestate::rawDiff( uint8_t* newdata, uint8_t* data, uint8_t* basedata, uint32_t datalength, uint32_t baselength)
665{
666  uint64_t* gd = (uint64_t*)data;
667  uint64_t* bd = (uint64_t*)basedata;
668  uint64_t* nd = (uint64_t*)newdata;
669
670  unsigned int i;
671  for( i=0; i<datalength/8; i++ )
672  {
673    if( i<baselength/8 )
674      *(nd+i) = *(gd+i) ^ *(bd+i);  // xor the data
675    else
676      *(nd+i) = *(gd+i); // just copy over the data
677  }
678  unsigned int j;
679  // now process the rest (when datalength isn't a multiple of 4)
680  for( j = 8*(datalength/8); j<datalength; j++ )
681  {
682    if( j<baselength )
683      *(newdata+j) = *(data+j) ^ *(basedata+j); // xor
684    else
685      *(newdata+j) = *(data+j); // just copy
686  }
687  assert(j==datalength);
688}*/
689
690
691/*Gamestate* Gamestate::doSelection(unsigned int clientID, unsigned int targetSize){
692  assert(data_);
693  std::list<obj>::iterator it;
694
695  // allocate memory for new data
696  uint8_t *gdata = new uint8_t[header_.getDataSize()+GamestateHeader::getSize()];
697  // create a gamestate out of it
698  Gamestate *gs = new Gamestate(gdata);
699  uint8_t *newdata = gdata + GamestateHeader::getSize();
700  uint8_t *origdata = GAMESTATE_START(data_);
701
702  //copy the GamestateHeader
703  assert(gs->header_);
704  *(gs->header_) = *header_;
705
706  uint32_t objectOffset;
707  unsigned int objectsize, destsize=0;
708  // TODO: Why is this variable not used?
709  //Synchronisable *object;
710
711  //call TrafficControl
712  TrafficControl::getInstance()->processObjectList( clientID, header_.getID(), dataVector_ );
713
714  //copy in the zeros
715//   std::list<obj>::iterator itt;
716//   orxout() << "myvector contains:";
717//   for ( itt=dataVector_.begin() ; itt!=dataVector_.end(); itt++ )
718//     orxout() << " " << (*itt).objID;
719//   orxout() << endl;
720  for(it=dataVector_.begin(); it!=dataVector_.end();){
721    SynchronisableHeader oldobjectheader(origdata);
722    SynchronisableHeader newobjectheader(newdata);
723    if ( (*it).objSize == 0 )
724    {
725      ++it;
726      continue;
727    }
728    objectsize = oldobjectheader.getDataSize()+SynchronisableHeader::getSize();
729    objectOffset=SynchronisableHeader::getSize(); //skip the size and the availableData variables in the objectheader
730    if ( (*it).objID == oldobjectheader.getObjectID() ){
731      memcpy(newdata, origdata, objectsize);
732      ++it;
733    }else{
734      newobjectheader = oldobjectheader;
735      memset(newdata+objectOffset, 0, objectsize-objectOffset);
736    }
737    newdata += objectsize;
738    origdata += objectsize;
739    destsize += objectsize;
740  }
741#ifndef NDEBUG
742  uint32_t origsize = destsize;
743  while ( origsize < header_.getDataSize() )
744  {
745    SynchronisableHeader oldobjectheader(origdata);
746    objectsize = oldobjectheader.getDataSize()+SynchronisableHeader::getSize();
747    origdata += objectsize;
748    origsize += objectsize;
749  }
750  assert(origsize==header_.getDataSize());
751  assert(destsize!=0);
752#endif
753  gs->header_.setDataSize( destsize );
754  return gs;
755}*/
756
757
758uint32_t Gamestate::calcGamestateSize(uint32_t id, uint8_t mode)
759{
760  uint32_t size = 0;
761  uint32_t nrOfVariables = 0;
762    // get total size of gamestate
763  for(Synchronisable* synchronisable : ObjectList<Synchronisable>()){
764    size+=synchronisable->getSize(id, mode); // size of the actual data of the synchronisable
765    nrOfVariables += synchronisable->getNrOfVariables();
766  }
767//   orxout() << "allocating " << nrOfVariables << " ints" << endl;
768  this->sizes_.reserve(nrOfVariables);
769  return size;
770}
771
772
773} //namespace packet
774} //namespace orxonox
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