src/nodemetadata.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "nodemetadata.h"
  21 #include "utility.h"
  22 #include "exceptions.h"
  23 #include "gamedef.h"
  24 #include "inventory.h"
  25 #include <sstream>
  26 #include "log.h"
  27
  28 /*
  29         NodeMetadata
  30 */
  31
  32 NodeMetadata::NodeMetadata(IGameDef *gamedef):
  33         m_stringvars(),
  34         m_inventory(new Inventory(gamedef->idef()))
  35 {
  36 }
  37
  38 NodeMetadata::~NodeMetadata()
  39 {
  40         delete m_inventory;
  41 }
  42
  43 void NodeMetadata::serialize(std::ostream &os) const
  44 {
  45         int num_vars = m_stringvars.size();
  46         writeU32(os, num_vars);
  47         for(std::map<std::string, std::string>::const_iterator
  48                         i = m_stringvars.begin(); i != m_stringvars.end(); i++){
  49                 os<<serializeString(i->first);
  50                 os<<serializeLongString(i->second);
  51         }
  52
  53         m_inventory->serialize(os);
  54 }
  55
  56 void NodeMetadata::deSerialize(std::istream &is)
  57 {
  58         m_stringvars.clear();
  59         int num_vars = readU32(is);
  60         for(int i=0; i<num_vars; i++){
  61                 std::string name = deSerializeString(is);
  62                 std::string var = deSerializeLongString(is);
  63                 m_stringvars[name] = var;
  64         }
  65
  66         m_inventory->deSerialize(is);
  67 }
  68
  69 void NodeMetadata::clear()
  70 {
  71         m_stringvars.clear();
  72         m_inventory->clear();
  73 }
  74
  75 /*
  76         NodeMetadataList
  77 */
  78
  79 void NodeMetadataList::serialize(std::ostream &os) const
  80 {
  81         /*
  82                 Version 0 is a placeholder for "nothing to see here; go away."
  83         */
  84
  85         if(m_data.size() == 0){
  86                 writeU8(os, 0); // version
  87                 return;
  88         }
  89
  90         writeU8(os, 1); // version
  91
  92         u16 count = m_data.size();
  93         writeU16(os, count);
  94
  95         for(std::map<v3s16, NodeMetadata*>::const_iterator
  96                         i = m_data.begin();
  97                         i != m_data.end(); i++)
  98         {
  99                 v3s16 p = i->first;
 100                 NodeMetadata *data = i->second;
 101
 102                 u16 p16 = p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X;
 103                 writeU16(os, p16);
 104
 105                 data->serialize(os);
 106         }
 107 }
 108
 109 void NodeMetadataList::deSerialize(std::istream &is, IGameDef *gamedef)
 110 {
 111         m_data.clear();
 112
 113         u8 version = readU8(is);
 114
 115         if(version == 0){
 116                 // Nothing
 117                 return;
 118         }
 119
 120         if(version != 1){
 121                 infostream<<__FUNCTION_NAME<<": version "<<version<<" not supported"
 122                                 <<std::endl;
 123                 throw SerializationError("NodeMetadataList::deSerialize");
 124         }
 125
 126         u16 count = readU16(is);
 127
 128         for(u16 i=0; i<count; i++)
 129         {
 130                 u16 p16 = readU16(is);
 131
 132                 v3s16 p(0,0,0);
 133                 p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
 134                 p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 135                 p.Y += p16 / MAP_BLOCKSIZE;
 136                 p16 -= p.Y * MAP_BLOCKSIZE;
 137                 p.X += p16;
 138
 139                 if(m_data.find(p) != m_data.end())
 140                 {
 141                         infostream<<"WARNING: NodeMetadataList::deSerialize(): "
 142                                         <<"already set data at position"
 143                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<"): Ignoring."
 144                                         <<std::endl;
 145                         continue;
 146                 }
 147
 148                 NodeMetadata *data = new NodeMetadata(gamedef);
 149                 data->deSerialize(is);
 150                 m_data[p] = data;
 151         }
 152 }
 153
 154 NodeMetadataList::~NodeMetadataList()
 155 {
 156         clear();
 157 }
 158
 159 NodeMetadata* NodeMetadataList::get(v3s16 p)
 160 {
 161         std::map<v3s16, NodeMetadata*>::const_iterator n = m_data.find(p);
 162         if(n == m_data.end())
 163                 return NULL;
 164         return n->second;
 165 }
 166
 167 void NodeMetadataList::remove(v3s16 p)
 168 {
 169         NodeMetadata *olddata = get(p);
 170         if(olddata)
 171         {
 172                 delete olddata;
 173                 m_data.erase(p);
 174         }
 175 }
 176
 177 void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
 178 {
 179         remove(p);
 180         m_data.insert(std::make_pair(p, d));
 181 }
 182
 183 void NodeMetadataList::clear()
 184 {
 185         for(std::map<v3s16, NodeMetadata*>::iterator
 186                         i = m_data.begin();
 187                         i != m_data.end(); i++)
 188         {
 189                 delete i->second;
 190         }
 191         m_data.clear();
 192 }