[1711] | 1 | /* |
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| 2 | * ORXONOX - the hottest 3D action shooter ever to exist |
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| 3 | * > www.orxonox.net < |
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| 4 | * |
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| 5 | * |
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| 6 | * License notice: |
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| 7 | * |
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| 8 | * This program is free software; you can redistribute it and/or |
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| 9 | * modify it under the terms of the GNU General Public License |
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| 10 | * as published by the Free Software Foundation; either version 2 |
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| 11 | * of the License, or (at your option) any later version. |
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| 12 | * |
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| 13 | * This program is distributed in the hope that it will be useful, |
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 16 | * GNU General Public License for more details. |
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| 17 | * |
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| 18 | * You should have received a copy of the GNU General Public License |
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| 19 | * along with this program; if not, write to the Free Software |
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| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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| 21 | * |
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| 22 | * Author: |
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| 23 | * Oliver Scheuss, (C) 2008 |
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| 24 | * Co-authors: |
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| 25 | * ... |
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| 26 | * |
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| 27 | */ |
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| 28 | |
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[1701] | 29 | #include "Gamestate.h" |
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| 30 | #include "network/ClientInformation.h" |
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[1705] | 31 | #include "network/GamestateHandler.h" |
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[1763] | 32 | #include "core/CoreIncludes.h" |
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[1751] | 33 | #include "core/Iterator.h" |
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[1701] | 34 | |
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| 35 | #include <zlib.h> |
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| 36 | #include <assert.h> |
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| 37 | |
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| 38 | |
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| 39 | |
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| 40 | namespace network { |
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| 41 | |
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| 42 | namespace packet { |
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| 43 | |
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[1751] | 44 | #define GAMESTATE_START(data) (data + sizeof(GamestateHeader)) |
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[1701] | 45 | #define GAMESTATE_HEADER(data) ((GamestateHeader *)data) |
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| 46 | #define HEADER GAMESTATE_HEADER(data_) |
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[1740] | 47 | |
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[1775] | 48 | |
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[1701] | 49 | Gamestate::Gamestate() |
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| 50 | { |
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| 51 | } |
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| 52 | |
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[1715] | 53 | Gamestate::Gamestate(unsigned char *data, int clientID): |
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[1711] | 54 | Packet(data, clientID) |
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[1701] | 55 | { |
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| 56 | } |
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| 57 | |
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[1800] | 58 | Gamestate::Gamestate(unsigned char *data) |
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| 59 | { |
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| 60 | data_=data; |
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| 61 | } |
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[1701] | 62 | |
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[1800] | 63 | |
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[1701] | 64 | Gamestate::~Gamestate() |
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| 65 | { |
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| 66 | } |
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| 67 | |
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| 68 | bool Gamestate::collectData(int id, int mode) |
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| 69 | { |
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| 70 | int tempsize=0, currentsize=0; |
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[1751] | 71 | assert(data_==0); |
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| 72 | int size = calcGamestateSize(id, mode); |
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[1740] | 73 | |
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[1701] | 74 | COUT(4) << "G.ST.Man: producing gamestate with id: " << id << std::endl; |
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| 75 | if(size==0) |
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| 76 | return false; |
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| 77 | data_ = new unsigned char[size + sizeof(GamestateHeader)]; |
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| 78 | if(!data_){ |
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| 79 | COUT(2) << "GameStateManager: could not allocate memory" << std::endl; |
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| 80 | return false; |
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| 81 | } |
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[1834] | 82 | |
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| 83 | #ifndef NDEBUG |
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| 84 | std::list<Synchronisable*> slist; |
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| 85 | std::list<Synchronisable*>::iterator iit; |
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| 86 | #endif |
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[1701] | 87 | //start collect data synchronisable by synchronisable |
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| 88 | unsigned char *mem=data_; |
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| 89 | mem+=sizeof(GamestateHeader); |
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[1747] | 90 | orxonox::ObjectList<Synchronisable>::iterator it; |
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| 91 | for(it = orxonox::ObjectList<Synchronisable>::begin(); it; ++it){ |
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[1775] | 92 | tempsize=it->getSize(id, mode); |
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[1740] | 93 | |
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[1701] | 94 | if(currentsize+tempsize > size){ |
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| 95 | // start allocate additional memory |
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| 96 | COUT(3) << "G.St.Man: need additional memory" << std::endl; |
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[1747] | 97 | orxonox::ObjectList<Synchronisable>::iterator temp = it; |
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[1701] | 98 | int addsize=tempsize; |
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| 99 | while(++temp) |
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[1775] | 100 | addsize+=temp->getSize(id, mode); |
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[1701] | 101 | data_ = (unsigned char *)realloc(data_, sizeof(GamestateHeader) + currentsize + addsize); |
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| 102 | if(!data_) |
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| 103 | return false; |
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| 104 | size = currentsize+addsize; |
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| 105 | }// stop allocate additional memory |
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| 106 | |
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[1834] | 107 | #ifndef NDEBUG |
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| 108 | for(iit=slist.begin(); iit!=slist.end(); iit++) |
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| 109 | assert((*iit)!=*it); |
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| 110 | slist.push_back(*it); |
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| 111 | #endif |
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| 112 | |
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[1827] | 113 | //if(it->doSelection(id)) |
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| 114 | dataMap_[mem-data_]=(*it); // save the mem location of the synchronisable data |
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[1751] | 115 | if(!it->getData(mem, id, mode)) |
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[1701] | 116 | return false; // mem pointer gets automatically increased because of call by reference |
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| 117 | // increase size counter by size of current synchronisable |
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| 118 | currentsize+=tempsize; |
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| 119 | } |
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[1740] | 120 | |
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| 121 | |
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[1701] | 122 | //start write gamestate header |
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[1710] | 123 | HEADER->packetType = ENUM::Gamestate; |
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[1740] | 124 | assert( *(ENUM::Type *)(data_) == ENUM::Gamestate); |
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[1775] | 125 | HEADER->datasize = currentsize; |
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[1701] | 126 | HEADER->id = id; |
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| 127 | HEADER->diffed = false; |
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| 128 | HEADER->complete = true; |
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[1715] | 129 | HEADER->compressed = false; |
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[1701] | 130 | //stop write gamestate header |
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[1740] | 131 | |
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[1701] | 132 | COUT(5) << "G.ST.Man: Gamestate size: " << currentsize << std::endl; |
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| 133 | COUT(5) << "G.ST.Man: 'estimated' (and corrected) Gamestate size: " << size << std::endl; |
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| 134 | return true; |
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| 135 | } |
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| 136 | |
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| 137 | bool Gamestate::spreadData(int mode) |
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| 138 | { |
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[1751] | 139 | assert(data_); |
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| 140 | assert(!HEADER->compressed); |
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| 141 | assert(!HEADER->diffed); |
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[1701] | 142 | unsigned char *mem=data_+sizeof(GamestateHeader); |
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| 143 | // get the start of the Synchronisable list |
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[1775] | 144 | //orxonox::ObjectList<Synchronisable>::iterator it=orxonox::ObjectList<Synchronisable>::begin(); |
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| 145 | Synchronisable *s; |
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[1740] | 146 | |
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[1775] | 147 | // update the data of the objects we received |
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| 148 | while(mem < data_+sizeof(GamestateHeader)+HEADER->datasize){ |
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[1827] | 149 | synchronisableHeader *objectheader = (synchronisableHeader*)mem; |
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[1701] | 150 | |
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[1827] | 151 | s = Synchronisable::getSynchronisable( objectheader->objectID ); |
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[1775] | 152 | if(!s) |
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[1701] | 153 | { |
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[1775] | 154 | s = Synchronisable::fabricate(mem, mode); |
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[1834] | 155 | assert(s); |
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| 156 | // if(!s) |
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| 157 | // return false; |
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[1701] | 158 | } |
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[1775] | 159 | else |
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| 160 | { |
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[1834] | 161 | assert(s->updateData(mem, mode)); |
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| 162 | //if(!s->updateData(mem, mode)) |
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| 163 | //return false; |
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[1775] | 164 | } |
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[1701] | 165 | } |
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| 166 | |
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| 167 | return true; |
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| 168 | } |
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| 169 | |
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[1775] | 170 | |
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| 171 | |
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[1705] | 172 | int Gamestate::getID(){ |
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| 173 | return HEADER->id; |
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| 174 | } |
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| 175 | |
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[1701] | 176 | unsigned int Gamestate::getSize() const |
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| 177 | { |
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[1711] | 178 | assert(data_); |
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[1715] | 179 | if(HEADER->compressed) |
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[1701] | 180 | return HEADER->compsize+sizeof(GamestateHeader); |
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| 181 | else |
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| 182 | { |
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[1775] | 183 | return HEADER->datasize+sizeof(GamestateHeader); |
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[1701] | 184 | } |
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| 185 | } |
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| 186 | |
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[1751] | 187 | bool Gamestate::operator==(packet::Gamestate gs){ |
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| 188 | unsigned char *d1 = data_+sizeof(GamestateHeader); |
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| 189 | unsigned char *d2 = gs.data_+sizeof(GamestateHeader); |
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| 190 | assert(!isCompressed()); |
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| 191 | assert(!gs.isCompressed()); |
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[1775] | 192 | while(d1<data_+HEADER->datasize) |
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[1751] | 193 | { |
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| 194 | if(*d1!=*d2) |
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| 195 | return false; |
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| 196 | d1++; |
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| 197 | d2++; |
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| 198 | } |
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| 199 | return true; |
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| 200 | } |
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| 201 | |
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[1701] | 202 | bool Gamestate::process() |
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| 203 | { |
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[1705] | 204 | return GamestateHandler::addGamestate(this, getClientID()); |
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[1701] | 205 | } |
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| 206 | |
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[1827] | 207 | |
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| 208 | |
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[1701] | 209 | bool Gamestate::compressData() |
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| 210 | { |
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| 211 | assert(HEADER); |
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[1751] | 212 | assert(!HEADER->compressed); |
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[1775] | 213 | uLongf buffer = (uLongf)(((HEADER->datasize + 12)*1.01)+1); |
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[1701] | 214 | if(buffer==0) |
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| 215 | return false; |
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[1740] | 216 | |
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[1701] | 217 | unsigned char *ndata = new unsigned char[buffer+sizeof(GamestateHeader)]; |
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| 218 | unsigned char *dest = GAMESTATE_START(ndata); |
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[1751] | 219 | //unsigned char *dest = new unsigned char[buffer]; |
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| 220 | unsigned char *source = GAMESTATE_START(data_); |
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[1701] | 221 | int retval; |
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[1775] | 222 | retval = compress( dest, &buffer, source, (uLong)(HEADER->datasize) ); |
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[1701] | 223 | switch ( retval ) { |
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| 224 | case Z_OK: COUT(5) << "G.St.Man: compress: successfully compressed" << std::endl; break; |
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[1751] | 225 | case Z_MEM_ERROR: COUT(1) << "G.St.Man: compress: not enough memory available in gamestate.compress" << std::endl; return false; |
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| 226 | case Z_BUF_ERROR: COUT(2) << "G.St.Man: compress: not enough memory available in the buffer in gamestate.compress" << std::endl; return false; |
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| 227 | case Z_DATA_ERROR: COUT(2) << "G.St.Man: compress: data corrupted in gamestate.compress" << std::endl; return false; |
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[1701] | 228 | } |
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[1751] | 229 | #ifndef NDEBUG |
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| 230 | //decompress and compare the start and the decompressed data |
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[1775] | 231 | unsigned char *rdata = new unsigned char[HEADER->datasize+sizeof(GamestateHeader)]; |
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[1751] | 232 | unsigned char *d2 = GAMESTATE_START(rdata); |
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[1775] | 233 | uLongf length2 = HEADER->datasize; |
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[1751] | 234 | uncompress(d2, &length2, dest, buffer); |
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[1775] | 235 | for(unsigned int i=0; i<HEADER->datasize; i++){ |
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[1751] | 236 | assert(*(source+i)==*(d2+i)); |
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| 237 | } |
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| 238 | delete[] rdata; |
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| 239 | #endif |
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[1701] | 240 | |
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| 241 | //copy and modify header |
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[1751] | 242 | #ifndef NDEBUG |
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[1775] | 243 | HEADER->crc32 = calcCRC(data_+sizeof(GamestateHeader), HEADER->datasize); |
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[1751] | 244 | #endif |
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[1701] | 245 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 246 | //delete old data |
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| 247 | delete[] data_; |
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| 248 | //save new data |
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| 249 | data_ = ndata; |
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[1751] | 250 | HEADER->compsize = buffer; |
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| 251 | HEADER->compressed = true; |
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[1730] | 252 | assert(HEADER->compressed); |
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[1775] | 253 | COUT(3) << "gamestate compress datasize: " << HEADER->datasize << " compsize: " << HEADER->compsize << std::endl; |
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[1701] | 254 | return true; |
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| 255 | } |
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| 256 | bool Gamestate::decompressData() |
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| 257 | { |
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[1751] | 258 | assert(HEADER); |
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[1715] | 259 | assert(HEADER->compressed); |
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[1775] | 260 | COUT(3) << "GameStateClient: uncompressing gamestate. id: " << HEADER->id << ", baseid: " << HEADER->base_id << ", datasize: " << HEADER->datasize << ", compsize: " << HEADER->compsize << std::endl; |
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| 261 | unsigned int datasize = HEADER->datasize; |
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[1751] | 262 | unsigned int compsize = HEADER->compsize; |
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| 263 | unsigned int bufsize; |
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[1775] | 264 | assert(compsize<=datasize); |
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| 265 | bufsize = datasize; |
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[1751] | 266 | assert(bufsize!=0); |
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[1701] | 267 | unsigned char *ndata = new unsigned char[bufsize + sizeof(GamestateHeader)]; |
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| 268 | unsigned char *dest = ndata + sizeof(GamestateHeader); |
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[1751] | 269 | unsigned char *source = data_ + sizeof(GamestateHeader); |
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[1701] | 270 | int retval; |
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[1751] | 271 | uLongf length=bufsize; |
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| 272 | retval = uncompress( dest, &length, source, (uLong)compsize ); |
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[1701] | 273 | switch ( retval ) { |
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| 274 | case Z_OK: COUT(5) << "successfully decompressed" << std::endl; break; |
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| 275 | case Z_MEM_ERROR: COUT(1) << "not enough memory available" << std::endl; return false; |
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| 276 | case Z_BUF_ERROR: COUT(2) << "not enough memory available in the buffer" << std::endl; return false; |
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| 277 | case Z_DATA_ERROR: COUT(2) << "data corrupted (zlib)" << std::endl; return false; |
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| 278 | } |
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[1751] | 279 | #ifndef NDEBUG |
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[1775] | 280 | assert(HEADER->crc32==calcCRC(ndata+sizeof(GamestateHeader), HEADER->datasize)); |
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[1751] | 281 | #endif |
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[1752] | 282 | |
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[1701] | 283 | //copy over the header |
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| 284 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 285 | //delete old (compressed data) |
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[1712] | 286 | delete[] data_; |
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[1751] | 287 | //set new pointers |
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[1701] | 288 | data_ = ndata; |
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[1751] | 289 | HEADER->compressed = false; |
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[1775] | 290 | assert(HEADER->datasize==datasize); |
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[1751] | 291 | assert(HEADER->compsize==compsize); |
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[1701] | 292 | return true; |
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| 293 | } |
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| 294 | |
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| 295 | Gamestate *Gamestate::diff(Gamestate *base) |
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| 296 | { |
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[1751] | 297 | assert(HEADER); |
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| 298 | assert(!HEADER->compressed); |
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| 299 | assert(!HEADER->diffed); |
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[1701] | 300 | //unsigned char *basep = base->getGs()/*, *gs = getGs()*/; |
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| 301 | unsigned char *basep = GAMESTATE_START(base->data_), *gs = GAMESTATE_START(this->data_); |
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| 302 | unsigned int of=0; // pointers offset |
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| 303 | unsigned int dest_length=0; |
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[1775] | 304 | dest_length=HEADER->datasize; |
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[1701] | 305 | if(dest_length==0) |
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| 306 | return NULL; |
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| 307 | unsigned char *ndata = new unsigned char[dest_length*sizeof(unsigned char)+sizeof(GamestateHeader)]; |
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| 308 | unsigned char *dest = ndata + sizeof(GamestateHeader); |
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[1775] | 309 | while(of < GAMESTATE_HEADER(base->data_)->datasize && of < HEADER->datasize){ |
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[1701] | 310 | *(dest+of)=*(basep+of)^*(gs+of); // do the xor |
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| 311 | ++of; |
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| 312 | } |
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[1775] | 313 | if(GAMESTATE_HEADER(base->data_)->datasize!=HEADER->datasize){ |
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[1701] | 314 | unsigned char n=0; |
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[1775] | 315 | if(GAMESTATE_HEADER(base->data_)->datasize < HEADER->datasize){ |
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[1701] | 316 | while(of<dest_length){ |
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| 317 | *(dest+of)=n^*(gs+of); |
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| 318 | of++; |
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| 319 | } |
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| 320 | } |
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| 321 | } |
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| 322 | |
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[1715] | 323 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 324 | GAMESTATE_HEADER(ndata)->diffed = true; |
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[1751] | 325 | GAMESTATE_HEADER(ndata)->base_id = base->getID(); |
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| 326 | Gamestate *g = new Gamestate(ndata, getClientID()); |
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| 327 | g->flags_=flags_; |
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| 328 | g->packetDirection_ = packetDirection_; |
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[1701] | 329 | return g; |
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| 330 | } |
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| 331 | |
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[1800] | 332 | Gamestate* Gamestate::doSelection(unsigned int clientID){ |
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| 333 | assert(data_); |
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[1827] | 334 | std::map<unsigned int, Synchronisable *>::iterator it; |
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| 335 | |
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| 336 | Gamestate *gs = new Gamestate(*this); |
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| 337 | unsigned char *ndata = gs->data_ + sizeof(GamestateHeader); |
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| 338 | synchronisableHeader *objectheader; |
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| 339 | unsigned int objectOffset; |
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| 340 | |
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| 341 | //copy in the zeros |
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[1800] | 342 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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[1827] | 343 | objectheader = (synchronisableHeader*)ndata; |
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| 344 | unsigned int objectsize = objectheader->size; |
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| 345 | assert(it->second->objectID==objectheader->objectID); |
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| 346 | objectOffset=sizeof(unsigned int)+sizeof(bool); //skip the size and the availableDate variables in the objectheader |
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| 347 | if(!it->second->doSelection(HEADER->id)){ |
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| 348 | while(objectOffset<objectsize){ |
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| 349 | objectheader->dataAvailable=false; |
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| 350 | *(ndata+objectOffset)=0; // set to 0 |
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| 351 | objectOffset++; |
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| 352 | } |
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| 353 | assert(objectOffset==objectsize); |
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| 354 | } |
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| 355 | ndata+=objectsize; |
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[1800] | 356 | } |
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[1827] | 357 | return gs; |
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| 358 | } |
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| 359 | |
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| 360 | |
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| 361 | Gamestate* Gamestate::intelligentDiff(Gamestate *base, unsigned int clientID){ |
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| 362 | // asserts |
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| 363 | assert(data_); |
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| 364 | assert(base->data_); |
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| 365 | assert(!GAMESTATE_HEADER(base->data_)->diffed); |
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| 366 | assert(!GAMESTATE_HEADER(base->data_)->compressed); |
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| 367 | assert(!HEADER->compressed); |
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| 368 | assert(!HEADER->diffed); |
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| 369 | |
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| 370 | //preparations |
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| 371 | std::map<unsigned int, Synchronisable *>::iterator it; |
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| 372 | unsigned char *origdata, *basedata, *destdata, *ndata; |
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| 373 | unsigned int objectOffset, streamOffset=0; //data offset |
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| 374 | unsigned int minsize = (HEADER->datasize < GAMESTATE_HEADER(base->data_)->datasize) ? HEADER->datasize : GAMESTATE_HEADER(base->data_)->datasize; |
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| 375 | synchronisableHeader *origheader; |
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| 376 | synchronisableHeader *destheader; |
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| 377 | |
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| 378 | origdata = GAMESTATE_START(this->data_); |
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| 379 | basedata = GAMESTATE_START(base->data_); |
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| 380 | ndata = new unsigned char[HEADER->datasize + sizeof(GamestateHeader)]; |
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| 381 | destdata = ndata + sizeof(GamestateHeader); |
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| 382 | |
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| 383 | // do the diff |
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[1800] | 384 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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[1827] | 385 | assert(streamOffset<HEADER->datasize); |
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| 386 | bool sendData = it->second->doSelection(HEADER->id); |
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| 387 | origheader = (synchronisableHeader *)(origdata+streamOffset); |
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| 388 | destheader = (synchronisableHeader *)(destdata+streamOffset); |
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| 389 | |
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| 390 | //copy and partially diff the object header |
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| 391 | assert(sizeof(synchronisableHeader)==3*sizeof(unsigned int)+sizeof(bool)); |
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| 392 | *(unsigned int*)destdata = *(unsigned int*)origdata; //size (do not diff) |
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| 393 | *(bool*)(destdata+sizeof(unsigned int)) = sendData; |
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| 394 | if(sendData){ |
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| 395 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+sizeof(unsigned int)+sizeof(bool)); //objectid (diff it) |
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| 396 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+2*sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+2*sizeof(unsigned int)+sizeof(bool)); //classid (diff it) |
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| 397 | }else{ |
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| 398 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = 0; |
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| 399 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = 0; |
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[1800] | 400 | } |
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[1827] | 401 | objectOffset=sizeof(synchronisableHeader); |
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| 402 | streamOffset+=sizeof(synchronisableHeader); |
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| 403 | |
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| 404 | //now handle the object data or fill with zeros |
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| 405 | while(objectOffset<origheader->size ){ |
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| 406 | |
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| 407 | if(sendData && streamOffset<minsize) |
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| 408 | *(destdata+objectOffset)=*(basedata+objectOffset)^*(origdata+objectOffset); // do the xor |
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| 409 | else if(sendData) |
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| 410 | *(destdata+objectOffset)=((unsigned char)0)^*(origdata+objectOffset); // xor with 0 (basestream is too short) |
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| 411 | else |
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| 412 | *(destdata+objectOffset)=0; // set to 0 because this object should not be transfered |
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| 413 | |
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| 414 | objectOffset++; |
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| 415 | streamOffset++; |
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| 416 | } |
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| 417 | destdata+=objectOffset; |
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| 418 | origdata+=objectOffset; |
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| 419 | basedata+=objectOffset; |
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[1800] | 420 | } |
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[1827] | 421 | |
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| 422 | //copy over the gamestate header and set the diffed flag |
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[1800] | 423 | *(GamestateHeader *)ndata = *HEADER; //copy over the header |
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| 424 | Gamestate *gs = new Gamestate(ndata); |
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[1827] | 425 | GAMESTATE_HEADER(ndata)->diffed=true; |
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[1800] | 426 | return gs; |
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| 427 | } |
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| 428 | |
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[1827] | 429 | Gamestate* Gamestate::intelligentUnDiff(Gamestate *base){ |
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| 430 | // asserts |
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| 431 | assert(data_); |
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| 432 | assert(base->data_); |
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| 433 | assert(!GAMESTATE_HEADER(base->data_)->diffed); |
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| 434 | assert(!GAMESTATE_HEADER(base->data_)->compressed); |
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| 435 | assert(!HEADER->compressed); |
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| 436 | assert(HEADER->diffed); |
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| 437 | |
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| 438 | //preparations |
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| 439 | std::map<unsigned int, Synchronisable *>::iterator it; |
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| 440 | unsigned char *origdata, *basedata, *destdata, *ndata; |
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| 441 | unsigned int objectOffset, streamOffset=0; //data offset |
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| 442 | unsigned int minsize = (HEADER->datasize < GAMESTATE_HEADER(base->data_)->datasize) ? HEADER->datasize : GAMESTATE_HEADER(base->data_)->datasize; |
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| 443 | synchronisableHeader *origheader; |
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| 444 | synchronisableHeader *destheader; |
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| 445 | |
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| 446 | origdata = GAMESTATE_START(this->data_); |
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| 447 | basedata = GAMESTATE_START(base->data_); |
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| 448 | ndata = new unsigned char[HEADER->datasize + sizeof(GamestateHeader)]; |
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| 449 | destdata = ndata + sizeof(GamestateHeader); |
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| 450 | |
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| 451 | // do the undiff |
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| 452 | for(it=dataMap_.begin(); it!=dataMap_.end(); it++){ |
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| 453 | assert(streamOffset<HEADER->datasize); |
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| 454 | origheader = (synchronisableHeader *)(origdata+streamOffset); |
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| 455 | destheader = (synchronisableHeader *)(destdata+streamOffset); |
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| 456 | bool sendData; |
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| 457 | |
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| 458 | //copy and partially diff the object header |
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| 459 | assert(sizeof(synchronisableHeader)==3*sizeof(unsigned int)+sizeof(bool)); |
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| 460 | *(unsigned int*)destdata = *(unsigned int*)origdata; //size (do not diff) |
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| 461 | *(bool*)(destdata+sizeof(unsigned int)) = *(bool*)(origdata+sizeof(unsigned int)); |
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| 462 | sendData = *(bool*)(origdata+sizeof(unsigned int)); |
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| 463 | if(sendData){ |
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| 464 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+sizeof(unsigned int)+sizeof(bool)); //objectid (diff it) |
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| 465 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = *(unsigned int*)(basedata+2*sizeof(unsigned int)+sizeof(bool)) ^ *(unsigned int*)(origdata+2*sizeof(unsigned int)+sizeof(bool)); //classid (diff it) |
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| 466 | }else{ |
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| 467 | *(unsigned int*)(destdata+sizeof(unsigned int)+sizeof(bool)) = 0; |
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| 468 | *(unsigned int*)(destdata+2*sizeof(unsigned int)+sizeof(bool)) = 0; |
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| 469 | } |
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| 470 | objectOffset=sizeof(synchronisableHeader); |
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| 471 | streamOffset+=sizeof(synchronisableHeader); |
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| 472 | |
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| 473 | //now handle the object data or fill with zeros |
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| 474 | while(objectOffset<origheader->size ){ |
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| 475 | |
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| 476 | if(sendData && streamOffset<minsize) |
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| 477 | *(destdata+objectOffset)=*(basedata+objectOffset)^*(origdata+objectOffset); // do the xor |
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| 478 | else if(sendData) |
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| 479 | *(destdata+objectOffset)=((unsigned char)0)^*(origdata+objectOffset); // xor with 0 (basestream is too short) |
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| 480 | else |
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| 481 | *(destdata+objectOffset)=0; // set to 0 because this object should not be transfered |
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| 482 | |
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| 483 | objectOffset++; |
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| 484 | streamOffset++; |
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| 485 | } |
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| 486 | destdata+=objectOffset; |
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| 487 | origdata+=objectOffset; |
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| 488 | basedata+=objectOffset; |
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| 489 | } |
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| 490 | |
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| 491 | //copy over the gamestate header and set the diffed flag |
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| 492 | *(GamestateHeader *)ndata = *HEADER; //copy over the header |
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| 493 | Gamestate *gs = new Gamestate(ndata); |
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| 494 | GAMESTATE_HEADER(ndata)->diffed=false; |
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| 495 | return gs; |
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| 496 | } |
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| 497 | |
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[1701] | 498 | Gamestate *Gamestate::undiff(Gamestate *base) |
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| 499 | { |
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[1751] | 500 | assert(this && base);assert(HEADER); |
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| 501 | assert(HEADER->diffed); |
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[1715] | 502 | assert(!HEADER->compressed && !GAMESTATE_HEADER(base->data_)->compressed); |
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[1701] | 503 | //unsigned char *basep = base->getGs()/*, *gs = getGs()*/; |
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| 504 | unsigned char *basep = GAMESTATE_START(base->data_); |
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| 505 | unsigned char *gs = GAMESTATE_START(this->data_); |
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| 506 | unsigned int of=0; // pointers offset |
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| 507 | unsigned int dest_length=0; |
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[1775] | 508 | dest_length=HEADER->datasize; |
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[1701] | 509 | if(dest_length==0) |
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| 510 | return NULL; |
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| 511 | unsigned char *ndata = new unsigned char[dest_length*sizeof(unsigned char)+sizeof(GamestateHeader)]; |
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| 512 | unsigned char *dest = ndata + sizeof(GamestateHeader); |
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[1775] | 513 | while(of < GAMESTATE_HEADER(base->data_)->datasize && of < HEADER->datasize){ |
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[1701] | 514 | *(dest+of)=*(basep+of)^*(gs+of); // do the xor |
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| 515 | ++of; |
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| 516 | } |
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[1775] | 517 | if(GAMESTATE_HEADER(base->data_)->datasize!=HEADER->datasize){ |
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[1701] | 518 | unsigned char n=0; |
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[1775] | 519 | if(GAMESTATE_HEADER(base->data_)->datasize < HEADER->datasize){ |
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[1701] | 520 | while(of < dest_length){ |
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| 521 | *(dest+of)=n^*(gs+of); |
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| 522 | of++; |
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| 523 | } |
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| 524 | } |
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| 525 | } |
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[1715] | 526 | *GAMESTATE_HEADER(ndata) = *HEADER; |
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| 527 | GAMESTATE_HEADER(ndata)->diffed = false; |
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[1751] | 528 | Gamestate *g = new Gamestate(ndata, getClientID()); |
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| 529 | g->flags_=flags_; |
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| 530 | g->packetDirection_ = packetDirection_; |
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| 531 | assert(!g->isDiffed()); |
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| 532 | assert(!g->isCompressed()); |
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[1701] | 533 | return g; |
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| 534 | } |
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| 535 | |
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| 536 | |
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[1751] | 537 | unsigned int Gamestate::calcGamestateSize(unsigned int id, int mode) |
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[1701] | 538 | { |
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| 539 | int size=0; |
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| 540 | // get the start of the Synchronisable list |
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[1747] | 541 | orxonox::ObjectList<Synchronisable>::iterator it; |
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[1701] | 542 | // get total size of gamestate |
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[1747] | 543 | for(it = orxonox::ObjectList<Synchronisable>::begin(); it; ++it) |
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[1775] | 544 | size+=it->getSize(id, mode); // size of the actual data of the synchronisable |
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[1701] | 545 | // size+=sizeof(GamestateHeader); |
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| 546 | return size; |
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| 547 | } |
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| 548 | |
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| 549 | /** |
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| 550 | * This function removes a Synchronisable out of the universe |
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| 551 | * @param it iterator of the list pointing to the object |
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| 552 | * @return iterator pointing to the next object in the list |
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| 553 | */ |
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[1747] | 554 | void Gamestate::removeObject(orxonox::ObjectList<Synchronisable>::iterator &it) { |
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| 555 | orxonox::ObjectList<Synchronisable>::iterator temp=it; |
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[1701] | 556 | ++it; |
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| 557 | delete *temp; |
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| 558 | } |
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| 559 | |
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[1712] | 560 | bool Gamestate::isDiffed(){ |
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| 561 | return HEADER->diffed; |
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| 562 | } |
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[1740] | 563 | |
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[1751] | 564 | bool Gamestate::isCompressed(){ |
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| 565 | return HEADER->compressed; |
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| 566 | } |
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[1752] | 567 | |
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[1712] | 568 | int Gamestate::getBaseID(){ |
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| 569 | return HEADER->base_id; |
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| 570 | } |
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[1701] | 571 | } |
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| 572 | |
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| 573 | } |
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