mirror of
https://github.com/minetest/minetest.git
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Schematic: Properly deal with before/after node resolving and document (#11011)
This fixes an out-of-bounds index access when the node resolver was already applied to the schematic (i.e. biome decoration). Also improves the handling of the two cases: prior node resolving (m_nodenames), and after node resolving (manual lookup)
This commit is contained in:
SmallJoker
GitHub
parent
a8cc3bdb08
commit
05719913ac
@ -76,10 +76,6 @@ void SchematicManager::clear()
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///////////////////////////////////////////////////////////////////////////////
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Schematic::Schematic()
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= default;
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Schematic::~Schematic()
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{
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delete []schemdata;
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@ -108,13 +104,19 @@ ObjDef *Schematic::clone() const
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void Schematic::resolveNodeNames()
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{
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c_nodes.clear();
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getIdsFromNrBacklog(&c_nodes, true, CONTENT_AIR);
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size_t bufsize = size.X * size.Y * size.Z;
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for (size_t i = 0; i != bufsize; i++) {
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content_t c_original = schemdata[i].getContent();
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content_t c_new = c_nodes[c_original];
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schemdata[i].setContent(c_new);
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if (c_original >= c_nodes.size()) {
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errorstream << "Corrupt schematic. name=\"" << name
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<< "\" at index " << i << std::endl;
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c_original = 0;
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}
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// Unfold condensed ID layout to content_t
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schemdata[i].setContent(c_nodes[c_original]);
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}
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}
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@ -279,8 +281,7 @@ void Schematic::placeOnMap(ServerMap *map, v3s16 p, u32 flags,
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}
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bool Schematic::deserializeFromMts(std::istream *is,
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std::vector<std::string> *names)
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bool Schematic::deserializeFromMts(std::istream *is)
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{
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std::istream &ss = *is;
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content_t cignore = CONTENT_IGNORE;
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@ -312,6 +313,8 @@ bool Schematic::deserializeFromMts(std::istream *is,
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slice_probs[y] = (version >= 3) ? readU8(ss) : MTSCHEM_PROB_ALWAYS_OLD;
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//// Read node names
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NodeResolver::reset();
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u16 nidmapcount = readU16(ss);
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for (int i = 0; i != nidmapcount; i++) {
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std::string name = deSerializeString16(ss);
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@ -324,9 +327,12 @@ bool Schematic::deserializeFromMts(std::istream *is,
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have_cignore = true;
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}
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names->push_back(name);
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m_nodenames.push_back(name);
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}
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// Prepare for node resolver
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m_nnlistsizes.push_back(m_nodenames.size());
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//// Read node data
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size_t nodecount = size.X * size.Y * size.Z;
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@ -358,9 +364,11 @@ bool Schematic::deserializeFromMts(std::istream *is,
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}
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bool Schematic::serializeToMts(std::ostream *os,
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const std::vector<std::string> &names) const
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bool Schematic::serializeToMts(std::ostream *os) const
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{
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// Nodes must not be resolved (-> condensed)
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// checking here is not possible because "schemdata" might be temporary.
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std::ostream &ss = *os;
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writeU32(ss, MTSCHEM_FILE_SIGNATURE); // signature
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@ -370,9 +378,10 @@ bool Schematic::serializeToMts(std::ostream *os,
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for (int y = 0; y != size.Y; y++) // Y slice probabilities
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writeU8(ss, slice_probs[y]);
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writeU16(ss, names.size()); // name count
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for (size_t i = 0; i != names.size(); i++)
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ss << serializeString16(names[i]); // node names
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writeU16(ss, m_nodenames.size()); // name count
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for (size_t i = 0; i != m_nodenames.size(); i++) {
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ss << serializeString16(m_nodenames[i]); // node names
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}
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// compressed bulk node data
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MapNode::serializeBulk(ss, SER_FMT_VER_HIGHEST_WRITE,
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@ -382,8 +391,7 @@ bool Schematic::serializeToMts(std::ostream *os,
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}
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bool Schematic::serializeToLua(std::ostream *os,
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const std::vector<std::string> &names, bool use_comments,
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bool Schematic::serializeToLua(std::ostream *os, bool use_comments,
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u32 indent_spaces) const
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{
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std::ostream &ss = *os;
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@ -392,6 +400,9 @@ bool Schematic::serializeToLua(std::ostream *os,
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if (indent_spaces > 0)
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indent.assign(indent_spaces, ' ');
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bool resolve_done = isResolveDone();
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FATAL_ERROR_IF(resolve_done && !m_ndef, "serializeToLua: NodeDefManager is required");
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//// Write header
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{
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ss << "schematic = {" << std::endl;
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@ -436,9 +447,22 @@ bool Schematic::serializeToLua(std::ostream *os,
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u8 probability = schemdata[i].param1 & MTSCHEM_PROB_MASK;
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bool force_place = schemdata[i].param1 & MTSCHEM_FORCE_PLACE;
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ss << indent << indent << "{"
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<< "name=\"" << names[schemdata[i].getContent()]
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<< "\", prob=" << (u16)probability * 2
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// After node resolving: real content_t, lookup using NodeDefManager
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// Prior node resolving: condensed ID, lookup using m_nodenames
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content_t c = schemdata[i].getContent();
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ss << indent << indent << "{" << "name=\"";
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if (!resolve_done) {
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// Prior node resolving (eg. direct schematic load)
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FATAL_ERROR_IF(c >= m_nodenames.size(), "Invalid node list");
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ss << m_nodenames[c];
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} else {
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// After node resolving (eg. biome decoration)
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ss << m_ndef->get(c).name;
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}
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ss << "\", prob=" << (u16)probability * 2
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<< ", param2=" << (u16)schemdata[i].param2;
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if (force_place)
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@ -467,25 +491,24 @@ bool Schematic::loadSchematicFromFile(const std::string &filename,
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return false;
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}
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size_t origsize = m_nodenames.size();
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if (!deserializeFromMts(&is, &m_nodenames))
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return false;
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if (!m_ndef)
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m_ndef = ndef;
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m_nnlistsizes.push_back(m_nodenames.size() - origsize);
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if (!deserializeFromMts(&is))
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return false;
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name = filename;
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if (replace_names) {
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for (size_t i = origsize; i < m_nodenames.size(); i++) {
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std::string &node_name = m_nodenames[i];
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for (std::string &node_name : m_nodenames) {
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StringMap::iterator it = replace_names->find(node_name);
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if (it != replace_names->end())
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node_name = it->second;
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}
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}
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if (ndef)
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ndef->pendNodeResolve(this);
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if (m_ndef)
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m_ndef->pendNodeResolve(this);
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return true;
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}
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@ -494,33 +517,26 @@ bool Schematic::loadSchematicFromFile(const std::string &filename,
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bool Schematic::saveSchematicToFile(const std::string &filename,
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const NodeDefManager *ndef)
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{
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MapNode *orig_schemdata = schemdata;
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std::vector<std::string> ndef_nodenames;
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std::vector<std::string> *names;
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Schematic *schem = this;
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if (m_resolve_done && ndef == NULL)
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ndef = m_ndef;
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bool needs_condense = isResolveDone();
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if (ndef) {
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names = &ndef_nodenames;
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if (!m_ndef)
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m_ndef = ndef;
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u32 volume = size.X * size.Y * size.Z;
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schemdata = new MapNode[volume];
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for (u32 i = 0; i != volume; i++)
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schemdata[i] = orig_schemdata[i];
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if (needs_condense) {
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if (!m_ndef)
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return false;
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generate_nodelist_and_update_ids(schemdata, volume, names, ndef);
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} else { // otherwise, use the names we have on hand in the list
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names = &m_nodenames;
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schem = (Schematic *)this->clone();
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schem->condenseContentIds();
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}
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std::ostringstream os(std::ios_base::binary);
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bool status = serializeToMts(&os, *names);
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bool status = schem->serializeToMts(&os);
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if (ndef) {
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delete []schemdata;
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schemdata = orig_schemdata;
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}
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if (needs_condense)
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delete schem;
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if (!status)
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return false;
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@ -556,6 +572,10 @@ bool Schematic::getSchematicFromMap(Map *map, v3s16 p1, v3s16 p2)
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}
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delete vm;
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// Reset and mark as complete
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NodeResolver::reset(true);
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return true;
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}
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@ -584,26 +604,29 @@ void Schematic::applyProbabilities(v3s16 p0,
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}
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void generate_nodelist_and_update_ids(MapNode *nodes, size_t nodecount,
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std::vector<std::string> *usednodes, const NodeDefManager *ndef)
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void Schematic::condenseContentIds()
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{
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std::unordered_map<content_t, content_t> nodeidmap;
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content_t numids = 0;
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// Reset node resolve fields
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NodeResolver::reset();
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size_t nodecount = size.X * size.Y * size.Z;
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for (size_t i = 0; i != nodecount; i++) {
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content_t id;
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content_t c = nodes[i].getContent();
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content_t c = schemdata[i].getContent();
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std::unordered_map<content_t, content_t>::const_iterator it = nodeidmap.find(c);
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auto it = nodeidmap.find(c);
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if (it == nodeidmap.end()) {
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id = numids;
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numids++;
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usednodes->push_back(ndef->get(c).name);
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nodeidmap.insert(std::make_pair(c, id));
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m_nodenames.push_back(m_ndef->get(c).name);
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nodeidmap.emplace(std::make_pair(c, id));
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} else {
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id = it->second;
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}
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nodes[i].setContent(id);
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schemdata[i].setContent(id);
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}
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}
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@ -92,7 +92,7 @@ enum SchematicFormatType {
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class Schematic : public ObjDef, public NodeResolver {
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public:
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Schematic();
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Schematic() = default;
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virtual ~Schematic();
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ObjDef *clone() const;
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@ -105,11 +105,9 @@ public:
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const NodeDefManager *ndef);
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bool getSchematicFromMap(Map *map, v3s16 p1, v3s16 p2);
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bool deserializeFromMts(std::istream *is, std::vector<std::string> *names);
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bool serializeToMts(std::ostream *os,
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const std::vector<std::string> &names) const;
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bool serializeToLua(std::ostream *os, const std::vector<std::string> &names,
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bool use_comments, u32 indent_spaces) const;
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bool deserializeFromMts(std::istream *is);
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bool serializeToMts(std::ostream *os) const;
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bool serializeToLua(std::ostream *os, bool use_comments, u32 indent_spaces) const;
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void blitToVManip(MMVManip *vm, v3s16 p, Rotation rot, bool force_place);
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bool placeOnVManip(MMVManip *vm, v3s16 p, u32 flags, Rotation rot, bool force_place);
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@ -124,6 +122,10 @@ public:
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v3s16 size;
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MapNode *schemdata = nullptr;
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u8 *slice_probs = nullptr;
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private:
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// Counterpart to the node resolver: Condense content_t to a sequential "m_nodenames" list
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void condenseContentIds();
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};
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class SchematicManager : public ObjDefManager {
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@ -151,5 +153,3 @@ private:
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Server *m_server;
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};
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void generate_nodelist_and_update_ids(MapNode *nodes, size_t nodecount,
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std::vector<std::string> *usednodes, const NodeDefManager *ndef);
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@ -1675,8 +1675,7 @@ bool NodeDefManager::nodeboxConnects(MapNode from, MapNode to,
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NodeResolver::NodeResolver()
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{
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m_nodenames.reserve(16);
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m_nnlistsizes.reserve(4);
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reset();
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}
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@ -1779,3 +1778,16 @@ bool NodeResolver::getIdsFromNrBacklog(std::vector<content_t> *result_out,
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return success;
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}
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void NodeResolver::reset(bool resolve_done)
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{
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m_nodenames.clear();
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m_nodenames_idx = 0;
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m_nnlistsizes.clear();
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m_nnlistsizes_idx = 0;
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m_resolve_done = resolve_done;
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m_nodenames.reserve(16);
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m_nnlistsizes.reserve(4);
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}
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@ -44,6 +44,9 @@ class ITextureSource;
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class IShaderSource;
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class IGameDef;
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class NodeResolver;
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#if BUILD_UNITTESTS
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class TestSchematic;
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#endif
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enum ContentParamType
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{
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@ -789,10 +792,13 @@ private:
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NodeDefManager *createNodeDefManager();
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// NodeResolver: Queue for node names which are then translated
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// to content_t after the NodeDefManager was initialized
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class NodeResolver {
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public:
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NodeResolver();
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virtual ~NodeResolver();
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// Callback which is run as soon NodeDefManager is ready
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virtual void resolveNodeNames() = 0;
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// required because this class is used as mixin for ObjDef
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@ -804,12 +810,31 @@ public:
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bool getIdsFromNrBacklog(std::vector<content_t> *result_out,
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bool all_required = false, content_t c_fallback = CONTENT_IGNORE);
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inline bool isResolveDone() const { return m_resolve_done; }
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void reset(bool resolve_done = false);
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// Vector containing all node names in the resolve "queue"
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std::vector<std::string> m_nodenames;
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// Specifies the "set size" of node names which are to be processed
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// this is used for getIdsFromNrBacklog
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// TODO: replace or remove
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std::vector<size_t> m_nnlistsizes;
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protected:
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friend class NodeDefManager; // m_ndef
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const NodeDefManager *m_ndef = nullptr;
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// Index of the next "m_nodenames" entry to resolve
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u32 m_nodenames_idx = 0;
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private:
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#if BUILD_UNITTESTS
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// Unittest requires access to m_resolve_done
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friend class TestSchematic;
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#endif
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void nodeResolveInternal();
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u32 m_nodenames_idx = 0;
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// Index of the next "m_nnlistsizes" entry to process
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u32 m_nnlistsizes_idx = 0;
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std::vector<std::string> m_nodenames;
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std::vector<size_t> m_nnlistsizes;
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const NodeDefManager *m_ndef = nullptr;
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bool m_resolve_done = false;
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};
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@ -1734,11 +1734,10 @@ int ModApiMapgen::l_serialize_schematic(lua_State *L)
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std::ostringstream os(std::ios_base::binary);
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switch (schem_format) {
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case SCHEM_FMT_MTS:
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schem->serializeToMts(&os, schem->m_nodenames);
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schem->serializeToMts(&os);
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break;
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case SCHEM_FMT_LUA:
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schem->serializeToLua(&os, schem->m_nodenames,
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use_comments, indent_spaces);
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schem->serializeToLua(&os, use_comments, indent_spaces);
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break;
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default:
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return 0;
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@ -56,6 +56,8 @@ void TestNodeResolver::runTests(IGameDef *gamedef)
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class Foobar : public NodeResolver {
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public:
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friend class TestNodeResolver; // m_ndef
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void resolveNodeNames();
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content_t test_nr_node1;
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@ -66,13 +66,14 @@ void TestSchematic::testMtsSerializeDeserialize(const NodeDefManager *ndef)
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std::stringstream ss(std::ios_base::binary |
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std::ios_base::in | std::ios_base::out);
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std::vector<std::string> names;
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names.emplace_back("foo");
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names.emplace_back("bar");
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names.emplace_back("baz");
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names.emplace_back("qux");
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Schematic schem, schem2;
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Schematic schem;
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{
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std::vector<std::string> &names = schem.m_nodenames;
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names.emplace_back("foo");
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names.emplace_back("bar");
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names.emplace_back("baz");
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names.emplace_back("qux");
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}
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schem.flags = 0;
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schem.size = size;
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@ -83,18 +84,21 @@ void TestSchematic::testMtsSerializeDeserialize(const NodeDefManager *ndef)
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for (s16 y = 0; y != size.Y; y++)
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schem.slice_probs[y] = MTSCHEM_PROB_ALWAYS;
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UASSERT(schem.serializeToMts(&ss, names));
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UASSERT(schem.serializeToMts(&ss));
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ss.seekg(0);
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names.clear();
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UASSERT(schem2.deserializeFromMts(&ss, &names));
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Schematic schem2;
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UASSERT(schem2.deserializeFromMts(&ss));
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UASSERTEQ(size_t, names.size(), 4);
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UASSERTEQ(std::string, names[0], "foo");
|
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UASSERTEQ(std::string, names[1], "bar");
|
||||
UASSERTEQ(std::string, names[2], "baz");
|
||||
UASSERTEQ(std::string, names[3], "qux");
|
||||
{
|
||||
std::vector<std::string> &names = schem2.m_nodenames;
|
||||
UASSERTEQ(size_t, names.size(), 4);
|
||||
UASSERTEQ(std::string, names[0], "foo");
|
||||
UASSERTEQ(std::string, names[1], "bar");
|
||||
UASSERTEQ(std::string, names[2], "baz");
|
||||
UASSERTEQ(std::string, names[3], "qux");
|
||||
}
|
||||
|
||||
UASSERT(schem2.size == size);
|
||||
for (size_t i = 0; i != volume; i++)
|
||||
@ -120,14 +124,14 @@ void TestSchematic::testLuaTableSerialize(const NodeDefManager *ndef)
|
||||
for (s16 y = 0; y != size.Y; y++)
|
||||
schem.slice_probs[y] = MTSCHEM_PROB_ALWAYS;
|
||||
|
||||
std::vector<std::string> names;
|
||||
std::vector<std::string> &names = schem.m_nodenames;
|
||||
names.emplace_back("air");
|
||||
names.emplace_back("default:lava_source");
|
||||
names.emplace_back("default:glass");
|
||||
|
||||
std::ostringstream ss(std::ios_base::binary);
|
||||
|
||||
UASSERT(schem.serializeToLua(&ss, names, false, 0));
|
||||
UASSERT(schem.serializeToLua(&ss, false, 0));
|
||||
UASSERTEQ(std::string, ss.str(), expected_lua_output);
|
||||
}
|
||||
|
||||
@ -159,6 +163,8 @@ void TestSchematic::testFileSerializeDeserialize(const NodeDefManager *ndef)
|
||||
schem1.slice_probs[0] = 80;
|
||||
schem1.slice_probs[1] = 160;
|
||||
schem1.slice_probs[2] = 240;
|
||||
// Node resolving happened manually.
|
||||
schem1.m_resolve_done = true;
|
||||
|
||||
for (size_t i = 0; i != volume; i++) {
|
||||
content_t c = content_map[test_schem2_data[i]];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user