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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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         m_inventorydrawspec(""),
  36         m_formspec(""),
  37         m_infotext(""),
  38         m_allow_removal(true)
  39 {
  40 }
  41
  42 NodeMetadata::~NodeMetadata()
  43 {
  44         delete m_inventory;
  45 }
  46
  47 void NodeMetadata::serialize(std::ostream &os) const
  48 {
  49         int num_vars = m_stringvars.size();
  50         writeU32(os, num_vars);
  51         for(std::map<std::string, std::string>::const_iterator
  52                         i = m_stringvars.begin(); i != m_stringvars.end(); i++){
  53                 os<<serializeString(i->first);
  54                 os<<serializeLongString(i->second);
  55         }
  56
  57         m_inventory->serialize(os);
  58         os<<serializeString(m_inventorydrawspec);
  59         os<<serializeString(m_formspec);
  60         os<<serializeString(m_infotext);
  61         writeU8(os, m_allow_removal);
  62 }
  63
  64 void NodeMetadata::deSerialize(std::istream &is)
  65 {
  66         m_stringvars.clear();
  67         int num_vars = readU32(is);
  68         for(int i=0; i<num_vars; i++){
  69                 std::string name = deSerializeString(is);
  70                 std::string var = deSerializeLongString(is);
  71                 m_stringvars[name] = var;
  72         }
  73
  74         m_inventory->deSerialize(is);
  75         m_inventorydrawspec = deSerializeString(is);
  76         m_formspec = deSerializeString(is);
  77         m_infotext = deSerializeString(is);
  78         m_allow_removal = readU8(is);
  79 }
  80
  81 void NodeMetadata::clear()
  82 {
  83         m_stringvars.clear();
  84         m_inventory->clear();
  85         m_inventorydrawspec = "";
  86         m_formspec = "";
  87         m_infotext = "";
  88         m_allow_removal = true;
  89 }
  90
  91 /*
  92         NodeMetadataList
  93 */
  94
  95 void NodeMetadataList::serialize(std::ostream &os) const
  96 {
  97         /*
  98                 Version 0 is a placeholder for "nothing to see here; go away."
  99         */
 100
 101         if(m_data.size() == 0){
 102                 writeU8(os, 0); // version
 103                 return;
 104         }
 105
 106         writeU8(os, 1); // version
 107
 108         u16 count = m_data.size();
 109         writeU16(os, count);
 110
 111         for(std::map<v3s16, NodeMetadata*>::const_iterator
 112                         i = m_data.begin();
 113                         i != m_data.end(); i++)
 114         {
 115                 v3s16 p = i->first;
 116                 NodeMetadata *data = i->second;
 117
 118                 u16 p16 = p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X;
 119                 writeU16(os, p16);
 120
 121                 data->serialize(os);
 122         }
 123 }
 124
 125 void NodeMetadataList::deSerialize(std::istream &is, IGameDef *gamedef)
 126 {
 127         m_data.clear();
 128
 129         u8 version = readU8(is);
 130
 131         if(version == 0){
 132                 // Nothing
 133                 return;
 134         }
 135
 136         if(version != 1){
 137                 infostream<<__FUNCTION_NAME<<": version "<<version<<" not supported"
 138                                 <<std::endl;
 139                 throw SerializationError("NodeMetadataList::deSerialize");
 140         }
 141
 142         u16 count = readU16(is);
 143
 144         for(u16 i=0; i<count; i++)
 145         {
 146                 u16 p16 = readU16(is);
 147
 148                 v3s16 p(0,0,0);
 149                 p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
 150                 p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
 151                 p.Y += p16 / MAP_BLOCKSIZE;
 152                 p16 -= p.Y * MAP_BLOCKSIZE;
 153                 p.X += p16;
 154
 155                 if(m_data.find(p) != m_data.end())
 156                 {
 157                         infostream<<"WARNING: NodeMetadataList::deSerialize(): "
 158                                         <<"already set data at position"
 159                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<"): Ignoring."
 160                                         <<std::endl;
 161                         continue;
 162                 }
 163
 164                 NodeMetadata *data = new NodeMetadata(gamedef);
 165                 data->deSerialize(is);
 166                 m_data[p] = data;
 167         }
 168 }
 169
 170 NodeMetadataList::~NodeMetadataList()
 171 {
 172         clear();
 173 }
 174
 175 NodeMetadata* NodeMetadataList::get(v3s16 p)
 176 {
 177         std::map<v3s16, NodeMetadata*>::const_iterator n = m_data.find(p);
 178         if(n == m_data.end())
 179                 return NULL;
 180         return n->second;
 181 }
 182
 183 void NodeMetadataList::remove(v3s16 p)
 184 {
 185         NodeMetadata *olddata = get(p);
 186         if(olddata)
 187         {
 188                 delete olddata;
 189                 m_data.erase(p);
 190         }
 191 }
 192
 193 void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
 194 {
 195         remove(p);
 196         m_data.insert(std::make_pair(p, d));
 197 }
 198
 199 void NodeMetadataList::clear()
 200 {
 201         for(std::map<v3s16, NodeMetadata*>::iterator
 202                         i = m_data.begin();
 203                         i != m_data.end(); i++)
 204         {
 205                 delete i->second;
 206         }
 207         m_data.clear();
 208 }