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/*
Minetest-c55
Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(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 General Public License for more details.
You should have received a copy of the GNU General Public License along
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 "utility.h"
#include "mapnode.h"
#include "exceptions.h"
#include "inventory.h"
#include <sstream>
#include "content_mapnode.h"
/*
NodeMetadata
*/
core::map<u16, NodeMetadata::Factory> NodeMetadata::m_types;
NodeMetadata::NodeMetadata()
{
}
NodeMetadata::~NodeMetadata()
{
}
NodeMetadata* NodeMetadata::deSerialize(std::istream &is)
{
// Read id
u8 buf[2];
is.read((char*)buf, 2);
s16 id = readS16(buf);
// Read data
std::string data = deSerializeString(is);
// Find factory function
core::map<u16, Factory>::Node *n;
n = m_types.find(id);
if(n == NULL)
{
// If factory is not found, just return.
dstream<<"WARNING: NodeMetadata: No factory for typeId="
<<id<<std::endl;
return NULL;
}
// Try to load the metadata. If it fails, just return.
try
{
std::istringstream iss(data, std::ios_base::binary);
Factory f = n->getValue();
NodeMetadata *meta = (*f)(iss);
return meta;
}
catch(SerializationError &e)
{
dstream<<"WARNING: NodeMetadata: ignoring SerializationError"<<std::endl;
return NULL;
}
}
void NodeMetadata::serialize(std::ostream &os)
{
u8 buf[2];
writeU16(buf, typeId());
os.write((char*)buf, 2);
std::ostringstream oss(std::ios_base::binary);
serializeBody(oss);
os<<serializeString(oss.str());
}
void NodeMetadata::registerType(u16 id, Factory f)
{
core::map<u16, Factory>::Node *n;
n = m_types.find(id);
if(n)
return;
m_types.insert(id, f);
}
/*
NodeMetadataList
*/
void NodeMetadataList::serialize(std::ostream &os)
{
u8 buf[6];
u16 version = 1;
writeU16(buf, version);
os.write((char*)buf, 2);
u16 count = m_data.size();
writeU16(buf, count);
os.write((char*)buf, 2);
for(core::map<v3s16, NodeMetadata*>::Iterator
i = m_data.getIterator();
i.atEnd()==false; i++)
{
v3s16 p = i.getNode()->getKey();
NodeMetadata *data = i.getNode()->getValue();
u16 p16 = p.Z*MAP_BLOCKSIZE*MAP_BLOCKSIZE + p.Y*MAP_BLOCKSIZE + p.X;
writeU16(buf, p16);
os.write((char*)buf, 2);
data->serialize(os);
}
}
void NodeMetadataList::deSerialize(std::istream &is)
{
m_data.clear();
u8 buf[6];
is.read((char*)buf, 2);
u16 version = readU16(buf);
if(version > 1)
{
dstream<<__FUNCTION_NAME<<": version "<<version<<" not supported"
<<std::endl;
throw SerializationError("NodeMetadataList::deSerialize");
}
is.read((char*)buf, 2);
u16 count = readU16(buf);
for(u16 i=0; i<count; i++)
{
is.read((char*)buf, 2);
u16 p16 = readU16(buf);
v3s16 p(0,0,0);
p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
p.Y += p16 / MAP_BLOCKSIZE;
p16 -= p.Y * MAP_BLOCKSIZE;
p.X += p16;
NodeMetadata *data = NodeMetadata::deSerialize(is);
if(data == NULL)
continue;
if(m_data.find(p))
{
dstream<<"WARNING: NodeMetadataList::deSerialize(): "
<<"already set data at position"
<<"("<<p.X<<","<<p.Y<<","<<p.Z<<"): Ignoring."
<<std::endl;
delete data;
continue;
}
m_data.insert(p, data);
}
}
NodeMetadataList::~NodeMetadataList()
{
for(core::map<v3s16, NodeMetadata*>::Iterator
i = m_data.getIterator();
i.atEnd()==false; i++)
{
delete i.getNode()->getValue();
}
}
NodeMetadata* NodeMetadataList::get(v3s16 p)
{
core::map<v3s16, NodeMetadata*>::Node *n;
n = m_data.find(p);
if(n == NULL)
return NULL;
return n->getValue();
}
void NodeMetadataList::remove(v3s16 p)
{
NodeMetadata *olddata = get(p);
if(olddata)
{
delete olddata;
m_data.remove(p);
}
}
void NodeMetadataList::set(v3s16 p, NodeMetadata *d)
{
remove(p);
m_data.insert(p, d);
}
bool NodeMetadataList::step(float dtime)
{
bool something_changed = false;
for(core::map<v3s16, NodeMetadata*>::Iterator
i = m_data.getIterator();
i.atEnd()==false; i++)
{
v3s16 p = i.getNode()->getKey();
NodeMetadata *meta = i.getNode()->getValue();
bool changed = meta->step(dtime);
if(changed)
something_changed = true;
}
return something_changed;
}
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