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 "mapnode.h"
  23 #include "exceptions.h"
  24
  25 /*
  26         NodeMetadata
  27 */
  28
  29 core::map<u16, NodeMetadata::Factory> NodeMetadata::m_types;
  30
  31 NodeMetadata::NodeMetadata()
  32 {
  33 }
  34
  35 NodeMetadata::~NodeMetadata()
  36 {
  37 }
  38
  39 NodeMetadata* NodeMetadata::deSerialize(std::istream &is)
  40 {
  41         u8 buf[2];
  42         is.read((char*)buf, 2);
  43         s16 id = readS16(buf);
  44
  45         core::map<u16, Factory>::Node *n;
  46         n = m_types.find(id);
  47         if(n == NULL)
  48         {
  49                 dstream<<"NodeMetadata(): No factory for typeId="<<id<<std::endl;
  50                 throw SerializationError("Unknown metadata id");
  51         }
  52
  53         Factory f = n->getValue();
  54         NodeMetadata *meta = (*f)(is);
  55         return meta;
  56 }
  57
  58 void NodeMetadata::serialize(std::ostream &os)
  59 {
  60         u8 buf[2];
  61         writeU16(buf, typeId());
  62         os.write((char*)buf, 2);
  63
  64         serializeBody(os);
  65 }
  66
  67 void NodeMetadata::registerType(u16 id, Factory f)
  68 {
  69         core::map<u16, Factory>::Node *n;
  70         n = m_types.find(id);
  71         if(n)
  72                 return;
  73         m_types.insert(id, f);
  74 }
  75
  76 /*
  77         SignNodeMetadata
  78 */
  79
  80 SignNodeMetadata::SignNodeMetadata(std::string text):
  81         m_text(text)
  82 {
  83         NodeMetadata::registerType(typeId(), create);
  84 }
  85 u16 SignNodeMetadata::typeId() const
  86 {
  87         return CONTENT_SIGN_WALL;
  88 }
  89 NodeMetadata* SignNodeMetadata::create(std::istream &is)
  90 {
  91         std::string text = deSerializeString(is);
  92         return new SignNodeMetadata(text);
  93 }
  94 NodeMetadata* SignNodeMetadata::clone()
  95 {
  96         return new SignNodeMetadata(m_text);
  97 }
  98 void SignNodeMetadata::serializeBody(std::ostream &os)
  99 {
 100         os<<serializeString(m_text);
 101 }
 102 std::string SignNodeMetadata::infoText()
 103 {
 104         return std::string("\"")+m_text+"\"";
 105 }
 106
 107 /*
 108         NodeMetadatalist
 109 */
 110
 111 void NodeMetadataList::serialize(std::ostream &os)
 112 {
 113         u8 buf[6];
 114
 115         u16 count = m_data.size();
 116         writeU16(buf, count);
 117         os.write((char*)buf, 2);
 118
 119         for(core::map<v3s16, NodeMetadata*>::Iterator
 120                         i = m_data.getIterator();
 121                         i.atEnd()==false; i++)
 122         {
 123                 v3s16 p = i.getNode()->getKey();
 124                 NodeMetadata *data = i.getNode()->getValue();
 125
 126                 u16 p16 = p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X;
 127                 writeU16(buf, p16);
 128                 os.write((char*)buf, 2);
 129
 130                 data->serialize(os);
 131         }
 132
 133 }
 134 void NodeMetadataList::deSerialize(std::istream &is)
 135 {
 136         m_data.clear();
 137
 138         u8 buf[6];
 139
 140         is.read((char*)buf, 2);
 141         u16 count = readU16(buf);
 142
 143         for(u16 i=0; i<count; i++)
 144         {
 145                 is.read((char*)buf, 2);
 146                 u16 p16 = readU16(buf);
 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))
 156                 {
 157                         dstream<<"ERROR: NodeMetadataList::deSerialize(): "
 158                                         <<"already set data at position"
 159                                         <<"("<<p.X<<","<<p.Y<<","<<p.Z<<")"
 160                                         <<std::endl;
 161                         throw SerializationError("NodeMetadataList::deSerialize()");
 162                 }
 163
 164                 NodeMetadata *data = NodeMetadata::deSerialize(is);
 165
 166                 m_data.insert(p, data);
 167         }
 168 }
 169
 170 NodeMetadataList::~NodeMetadataList()
 171 {
 172         for(core::map<v3s16, NodeMetadata*>::Iterator
 173                         i = m_data.getIterator();
 174                         i.atEnd()==false; i++)
 175         {
 176                 delete i.getNode()->getValue();
 177         }
 178 }
 179
 180 NodeMetadata* NodeMetadataList::get(v3s16 p)
 181 {
 182         core::map<v3s16, NodeMetadata*>::Node *n;
 183         n = m_data.find(p);
 184         if(n == NULL)
 185                 return NULL;
 186         return n->getValue();
 187 }
 188
 189 void NodeMetadataList::remove(v3s16 p)
 190 {
 191         NodeMetadata *olddata = get(p);
 192         if(olddata)
 193         {
 194                 delete olddata;
 195                 m_data.remove(p);
 196         }
 197 }
 198
 199 void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
 200 {
 201         remove(p);
 202         m_data.insert(p, d);
 203 }
 204