minetest/src/nodemetadata.cpp

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/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "nodemetadata.h"
#include "exceptions.h"
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#include "gamedef.h"
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#include "inventory.h"
#include "log.h"
#include "util/serialize.h"
#include "util/basic_macros.h"
#include "constants.h" // MAP_BLOCKSIZE
#include <sstream>
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/*
NodeMetadata
*/
NodeMetadata::NodeMetadata(IItemDefManager *item_def_mgr):
m_inventory(new Inventory(item_def_mgr))
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{}
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NodeMetadata::~NodeMetadata()
{
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delete m_inventory;
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}
void NodeMetadata::serialize(std::ostream &os, u8 version, bool disk) const
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{
int num_vars = disk ? m_stringvars.size() : countNonPrivate();
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writeU32(os, num_vars);
for (const auto &sv : m_stringvars) {
bool priv = isPrivate(sv.first);
if (!disk && priv)
continue;
os << serializeString16(sv.first);
os << serializeString32(sv.second);
if (version >= 2)
writeU8(os, (priv) ? 1 : 0);
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}
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m_inventory->serialize(os);
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}
void NodeMetadata::deSerialize(std::istream &is, u8 version)
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{
clear();
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int num_vars = readU32(is);
for(int i=0; i<num_vars; i++){
std::string name = deSerializeString16(is);
std::string var = deSerializeString32(is);
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m_stringvars[name] = var;
if (version >= 2) {
if (readU8(is) == 1)
markPrivate(name, true);
}
}
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m_inventory->deSerialize(is);
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}
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void NodeMetadata::clear()
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{
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Metadata::clear();
m_privatevars.clear();
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m_inventory->clear();
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}
bool NodeMetadata::empty() const
{
return Metadata::empty() && m_inventory->getLists().empty();
}
void NodeMetadata::markPrivate(const std::string &name, bool set)
{
if (set)
m_privatevars.insert(name);
else
m_privatevars.erase(name);
}
int NodeMetadata::countNonPrivate() const
{
// m_privatevars can contain names not actually present
// DON'T: return m_stringvars.size() - m_privatevars.size();
int n = 0;
for (const auto &sv : m_stringvars) {
if (!isPrivate(sv.first))
n++;
}
return n;
}
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/*
NodeMetadataList
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*/
void NodeMetadataList::serialize(std::ostream &os, u8 blockver, bool disk,
bool absolute_pos) const
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{
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/*
Version 0 is a placeholder for "nothing to see here; go away."
*/
u16 count = countNonEmpty();
if (count == 0) {
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writeU8(os, 0); // version
return;
}
u8 version = (blockver > 27) ? 2 : 1;
writeU8(os, version);
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writeU16(os, count);
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for (NodeMetadataMap::const_iterator
i = m_data.begin();
i != m_data.end(); ++i) {
v3s16 p = i->first;
NodeMetadata *data = i->second;
if (data->empty())
continue;
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if (absolute_pos) {
writeS16(os, p.X);
writeS16(os, p.Y);
writeS16(os, p.Z);
} else {
// Serialize positions within a mapblock
u16 p16 = (p.Z * MAP_BLOCKSIZE + p.Y) * MAP_BLOCKSIZE + p.X;
writeU16(os, p16);
}
data->serialize(os, version, disk);
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}
}
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void NodeMetadataList::deSerialize(std::istream &is,
IItemDefManager *item_def_mgr, bool absolute_pos)
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{
clear();
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u8 version = readU8(is);
if (version == 0) {
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// Nothing
return;
}
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if (version > 2) {
std::string err_str = std::string(FUNCTION_NAME)
+ ": version " + itos(version) + " not supported";
infostream << err_str << std::endl;
throw SerializationError(err_str);
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}
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u16 count = readU16(is);
for (u16 i = 0; i < count; i++) {
v3s16 p;
if (absolute_pos) {
p.X = readS16(is);
p.Y = readS16(is);
p.Z = readS16(is);
} else {
u16 p16 = readU16(is);
p.X = p16 & (MAP_BLOCKSIZE - 1);
p16 /= MAP_BLOCKSIZE;
p.Y = p16 & (MAP_BLOCKSIZE - 1);
p16 /= MAP_BLOCKSIZE;
p.Z = p16;
}
if (m_data.find(p) != m_data.end()) {
warningstream << "NodeMetadataList::deSerialize(): "
<< "already set data at position " << PP(p)
<< ": Ignoring." << std::endl;
continue;
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}
NodeMetadata *data = new NodeMetadata(item_def_mgr);
data->deSerialize(is, version);
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m_data[p] = data;
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}
}
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NodeMetadataList::~NodeMetadataList()
{
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clear();
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}
std::vector<v3s16> NodeMetadataList::getAllKeys()
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{
std::vector<v3s16> keys;
keys.reserve(m_data.size());
for (const auto &it : m_data)
keys.push_back(it.first);
return keys;
}
NodeMetadata *NodeMetadataList::get(v3s16 p)
{
NodeMetadataMap::const_iterator n = m_data.find(p);
if (n == m_data.end())
return nullptr;
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return n->second;
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}
void NodeMetadataList::remove(v3s16 p)
{
NodeMetadata *olddata = get(p);
if (olddata) {
if (m_is_metadata_owner)
delete olddata;
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m_data.erase(p);
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}
}
void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
{
remove(p);
m_data.emplace(p, d);
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}
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void NodeMetadataList::clear()
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{
if (m_is_metadata_owner) {
NodeMetadataMap::const_iterator it;
for (it = m_data.begin(); it != m_data.end(); ++it)
delete it->second;
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}
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m_data.clear();
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}
int NodeMetadataList::countNonEmpty() const
{
int n = 0;
for (const auto &it : m_data) {
if (!it.second->empty())
n++;
}
return n;
}