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