void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapBlock format not supported");
if(data == NULL)
{
throw SerializationError("ERROR: Not writing dummy block.");
}
// Can't do this anymore; we have 16-bit dynamically allocated node IDs
// in memory; conversion just won't work in this direction.
if(version < 24)
throw SerializationError("MapBlock::serialize: serialization to "
"version < 24 not possible");
// First byte
u8 flags = 0;
if(is_underground)
flags |= 0x01;
if(getDayNightDiff())
flags |= 0x02;
if(m_lighting_expired)
flags |= 0x04;
if(m_generated == false)
flags |= 0x08;
writeU8(os, flags);
/*
Bulk node data
*/
NameIdMapping nimap;
u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
if(disk)
{
MapNode *tmp_nodes = new MapNode[nodecount];
for(u32 i=0; i<nodecount; i++)
tmp_nodes[i] = data[i];
getBlockNodeIdMapping(&nimap, tmp_nodes, m_gamedef->ndef());
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, tmp_nodes, nodecount,
content_width, params_width, true);
delete[] tmp_nodes;
}
else
{
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, data, nodecount,
content_width, params_width, true);
}
/*
Node metadata
*/
std::ostringstream oss(std::ios_base::binary);
m_node_metadata.serialize(oss);
compressZlib(oss.str(), os);
/*
Data that goes to disk, but not the network
*/
if(disk)
{
// Node timers
m_node_timers.serialize(os);
// Static objects
m_static_objects.serialize(os);
// Timestamp
writeU32(os, getTimestamp());
// Write block-specific node definition id mapping
nimap.serialize(os);
}
}
void MapBlock::serialize_pre22(std::ostream &os, u8 version, bool disk)
{
u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
MapNode *tmp_data = new MapNode[nodecount];
// Legacy data changes
// This code has to change from post-22 to pre-22 format.
INodeDefManager *nodedef = m_gamedef->ndef();
for(u32 i=0; i<nodecount; i++)
{
const ContentFeatures &f = nodedef->get(tmp_data[i].getContent());
// Mineral
if(nodedef->getId("default:stone_with_coal") == tmp_data[i].getContent())
{
tmp_data[i].setContent(nodedef->getId("default:stone"));
tmp_data[i].setParam1(1); // MINERAL_COAL
}
else if(nodedef->getId("default:stone_with_iron") == tmp_data[i].getContent())
{
tmp_data[i].setContent(nodedef->getId("default:stone"));
tmp_data[i].setParam1(2); // MINERAL_IRON
}
// facedir_simple
if(f.legacy_facedir_simple)
{
tmp_data[i].setParam1(tmp_data[i].getParam2());
tmp_data[i].setParam2(0);
}
// wall_mounted
if(f.legacy_wallmounted)
{
u8 wallmounted_new_to_old[8] = {0x04, 0x08, 0x01, 0x02, 0x10, 0x20, 0, 0};
u8 dir_new_format = tmp_data[i].getParam2() & 7; // lowest 3 bits
u8 dir_old_format = wallmounted_new_to_old[dir_new_format];
tmp_data[i].setParam2(dir_old_format);
}
}
// Serialize nodes
u32 ser_length = MapNode::serializedLength(version);
SharedBuffer<u8> databuf_nodelist(nodecount * ser_length);
for(u32 i=0; i<nodecount; i++)
{
tmp_data[i].serialize(&databuf_nodelist[i*ser_length], version);
}
delete[] tmp_data;
// These have no compression
if(version <= 3 || version == 5 || version == 6)
{
writeU8(os, is_underground);
os.write((char*)*databuf_nodelist, databuf_nodelist.getSize());
}
else if(version <= 10)
{
/*
With compression.
Compress the materials and the params separately.
*/
// First byte
writeU8(os, is_underground);
// Get and compress materials
SharedBuffer<u8> materialdata(nodecount);
for(u32 i=0; i<nodecount; i++)
{
materialdata[i] = databuf_nodelist[i*ser_length];
}
compress(materialdata, os, version);
// Get and compress lights
SharedBuffer<u8> lightdata(nodecount);
for(u32 i=0; i<nodecount; i++)
{
lightdata[i] = databuf_nodelist[i*ser_length+1];
}
compress(lightdata, os, version);
if(version >= 10)
{
// Get and compress param2
SharedBuffer<u8> param2data(nodecount);
for(u32 i=0; i<nodecount; i++)
{
param2data[i] = databuf_nodelist[i*ser_length+2];
}
compress(param2data, os, version);
}
}
// All other versions (newest)
else
{
// First byte
u8 flags = 0;
if(is_underground)
flags |= 0x01;
if(getDayNightDiff())
flags |= 0x02;
if(m_lighting_expired)
flags |= 0x04;
if(version >= 18)
{
if(m_generated == false)
flags |= 0x08;
}
writeU8(os, flags);
/*
Get data
*/
// Create buffer with different parameters sorted
SharedBuffer<u8> databuf(nodecount*3);
for(u32 i=0; i<nodecount; i++)
{
databuf[i] = databuf_nodelist[i*ser_length];
databuf[i+nodecount] = databuf_nodelist[i*ser_length+1];
databuf[i+nodecount*2] = databuf_nodelist[i*ser_length+2];
}
/*
Compress data to output stream
*/
compress(databuf, os, version);
/*
NodeMetadata
*/
if(version >= 14)
{
if(version <= 15)
{
try{
std::ostringstream oss(std::ios_base::binary);
m_node_metadata->serialize(oss);
os<<serializeString(oss.str());
}
// This will happen if the string is longer than 65535
catch(SerializationError &e)
{
// Use an empty string
os<<serializeString("");
}
}
else
{
std::ostringstream oss(std::ios_base::binary);
m_node_metadata->serialize(oss);
compressZlib(oss.str(), os);
//os<<serializeLongString(oss.str());
}
}
}
if(disk)
{
// Versions up from 9 have block objects. (DEPRECATED)
if(version >= 9)
{
// count=0
writeU16(os, 0);
}
// Versions up from 15 have static objects.
if(version >= 15)
{
m_static_objects.serialize(os);
}
// Timestamp
if(version >= 17)
{
writeU32(os, getTimestamp());
}
// Scan and write node definition id mapping
if(version >= 21)
{
NameIdMapping nimap;
getBlockNodeIdMapping_pre22(&nimap, data, m_gamedef->ndef());
nimap.serialize(os);
}
}
}
void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
{
auto lock = lock_shared_rec();
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapBlock format not supported");
if(data == NULL)
{
throw SerializationError("ERROR: Not writing dummy block.");
}
FATAL_ERROR_IF(version < SER_FMT_CLIENT_VER_LOWEST, "Serialize version error");
// First byte
u8 flags = 0;
if(is_underground)
flags |= 0x01;
if(getDayNightDiff())
flags |= 0x02;
if(m_lighting_expired)
flags |= 0x04;
if(m_generated == false)
{
flags |= 0x08;
infostream<<" serialize not generated block"<<std::endl;
}
writeU8(os, flags);
/*
Bulk node data
*/
NameIdMapping nimap;
u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
if(disk)
{
MapNode *tmp_nodes = new MapNode[nodecount];
for(u32 i=0; i<nodecount; i++)
tmp_nodes[i] = data[i];
getBlockNodeIdMapping(&nimap, tmp_nodes, m_gamedef->ndef());
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, tmp_nodes, nodecount,
content_width, params_width, true);
delete[] tmp_nodes;
}
else
{
u8 content_width = 2;
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, data, nodecount,
content_width, params_width, true);
}
/*
Node metadata
*/
std::ostringstream oss(std::ios_base::binary);
m_node_metadata.serialize(oss);
compressZlib(oss.str(), os);
/*
Data that goes to disk, but not the network
*/
if(disk)
{
if(version <= 24){
// Node timers
m_node_timers.serialize(os, version);
}
// Static objects
m_static_objects.serialize(os);
// Timestamp
writeU32(os, getTimestamp());
// Write block-specific node definition id mapping
nimap.serialize(os);
if(version >= 25){
// Node timers
m_node_timers.serialize(os, version);
}
}
}
void MapBlock::serialize(std::ostream &os, u8 version, bool disk)
{
if(!ser_ver_supported(version))
throw VersionMismatchException("ERROR: MapBlock format not supported");
if(data == NULL)
{
throw SerializationError("ERROR: Not writing dummy block.");
}
if(version <= 21)
{
serialize_pre22(os, version, disk);
return;
}
// First byte
u8 flags = 0;
if(is_underground)
flags |= 0x01;
if(getDayNightDiff())
flags |= 0x02;
if(m_lighting_expired)
flags |= 0x04;
if(m_generated == false)
flags |= 0x08;
writeU8(os, flags);
/*
Bulk node data
*/
NameIdMapping nimap;
u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
if(disk)
{
MapNode *tmp_nodes = new MapNode[nodecount];
for(u32 i=0; i<nodecount; i++)
tmp_nodes[i] = data[i];
getBlockNodeIdMapping(&nimap, tmp_nodes, m_gamedef->ndef());
u8 content_width = 1;
/*u8 content_width = (nimap.size() <= 255) ? 1 : 2;*/
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, tmp_nodes, nodecount,
content_width, params_width, true);
delete[] tmp_nodes;
}
else
{
u8 content_width = 1;
/*u8 content_width = 2;*/
u8 params_width = 2;
writeU8(os, content_width);
writeU8(os, params_width);
MapNode::serializeBulk(os, version, data, nodecount,
content_width, params_width, true);
}
/*
Node metadata
*/
std::ostringstream oss(std::ios_base::binary);
m_node_metadata->serialize(oss);
compressZlib(oss.str(), os);
/*
Data that goes to disk, but not the network
*/
if(disk)
{
// Static objects
m_static_objects.serialize(os);
// Timestamp
writeU32(os, getTimestamp());
// Write block-specific node definition id mapping
nimap.serialize(os);
}
}