src/staticobject.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2010-2013 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 "staticobject.h"
  21 #include "util/serialize.h"
  22 #include "server/serveractiveobject.h"
  23
  24 StaticObject::StaticObject(const ServerActiveObject *s_obj, const v3f &pos_):
  25         type(s_obj->getType()),
  26         pos(pos_)
  27 {
  28         s_obj->getStaticData(&data);
  29 }
  30
  31 void StaticObject::serialize(std::ostream &os)
  32 {
  33         // type
  34         writeU8(os, type);
  35         // pos
  36         writeV3F1000(os, pos);
  37         // data
  38         os<<serializeString16(data);
  39 }
  40
  41 void StaticObject::deSerialize(std::istream &is, u8 version)
  42 {
  43         // type
  44         type = readU8(is);
  45         // pos
  46         pos = readV3F1000(is);
  47         // data
  48         data = deSerializeString16(is);
  49 }
  50
  51 void StaticObjectList::serialize(std::ostream &os)
  52 {
  53         // Check for problems first
  54         auto problematic = [] (StaticObject &obj) -> bool {
  55                 if (obj.data.size() > U16_MAX) {
  56                         errorstream << "StaticObjectList::serialize(): "
  57                                 "object has excessive static data (" << obj.data.size() <<
  58                                 "), deleting it." << std::endl;
  59                         return true;
  60                 }
  61                 return false;
  62         };
  63         for (auto it = m_stored.begin(); it != m_stored.end(); ) {
  64                 if (problematic(*it))
  65                         it = m_stored.erase(it);
  66                 else
  67                         it++;
  68         }
  69         for (auto it = m_active.begin(); it != m_active.end(); ) {
  70                 if (problematic(it->second))
  71                         it = m_active.erase(it);
  72                 else
  73                         it++;
  74         }
  75
  76         // version
  77         u8 version = 0;
  78         writeU8(os, version);
  79
  80         // count
  81         size_t count = m_stored.size() + m_active.size();
  82         // Make sure it fits into u16, else it would get truncated and cause e.g.
  83         // issue #2610 (Invalid block data in database: unsupported NameIdMapping version).
  84         if (count > U16_MAX) {
  85                 errorstream << "StaticObjectList::serialize(): "
  86                         << "too many objects (" << count << ") in list, "
  87                         << "not writing them to disk." << std::endl;
  88                 writeU16(os, 0);  // count = 0
  89                 return;
  90         }
  91         writeU16(os, count);
  92
  93         for (StaticObject &s_obj : m_stored) {
  94                 s_obj.serialize(os);
  95         }
  96
  97         for (auto &i : m_active) {
  98                 StaticObject s_obj = i.second;
  99                 s_obj.serialize(os);
 100         }
 101 }
 102 void StaticObjectList::deSerialize(std::istream &is)
 103 {
 104         if (m_active.size()) {
 105                 errorstream << "StaticObjectList::deSerialize(): "
 106                         << "deserializing objects while " << m_active.size()
 107                         << " active objects already exist (not cleared). "
 108                         << m_stored.size() << " stored objects _were_ cleared"
 109                         << std::endl;
 110         }
 111         m_stored.clear();
 112
 113         // version
 114         u8 version = readU8(is);
 115         // count
 116         u16 count = readU16(is);
 117         for(u16 i = 0; i < count; i++) {
 118                 StaticObject s_obj;
 119                 s_obj.deSerialize(is, version);
 120                 m_stored.push_back(s_obj);
 121         }
 122 }
 123