return NULL;
}
-#if 0
- /*
- Do not generate over-limit
- */
- if(p.X < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
- || p.X > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
- || p.Y < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
- || p.Y > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
- || p.Z < -MAP_GENERATION_LIMIT / MAP_BLOCKSIZE
- || p.Z > MAP_GENERATION_LIMIT / MAP_BLOCKSIZE)
- throw InvalidPositionException("emergeBlock(): pos. over limit");
-
- v2s16 p2d(p.X, p.Z);
- s16 block_y = p.Y;
- /*
- This will create or load a sector if not found in memory.
- If block exists on disk, it will be loaded.
- */
- ServerMapSector *sector;
- try{
- sector = createSector(p2d);
- //sector = emergeSector(p2d, changed_blocks);
- }
- catch(InvalidPositionException &e)
- {
- infostream<<"emergeBlock: createSector() failed: "
- <<e.what()<<std::endl;
- infostream<<"Path to failed sector: "<<getSectorDir(p2d)
- <<std::endl
- <<"You could try to delete it."<<std::endl;
- throw e;
- }
- catch(VersionMismatchException &e)
- {
- infostream<<"emergeBlock: createSector() failed: "
- <<e.what()<<std::endl;
- infostream<<"Path to failed sector: "<<getSectorDir(p2d)
- <<std::endl
- <<"You could try to delete it."<<std::endl;
- throw e;
- }
-
- /*
- Try to get a block from the sector
- */
-
- bool does_not_exist = false;
- bool lighting_expired = false;
- MapBlock *block = sector->getBlockNoCreateNoEx(block_y);
-
- // If not found, try loading from disk
- if(block == NULL)
- {
- block = loadBlock(p);
- }
-
- // Handle result
- if(block == NULL)
- {
- does_not_exist = true;
- }
- else if(block->isDummy() == true)
- {
- does_not_exist = true;
- }
- else if(block->getLightingExpired())
- {
- lighting_expired = true;
- }
- else
- {
- // Valid block
- //infostream<<"emergeBlock(): Returning already valid block"<<std::endl;
- return block;
- }
-
- /*
- If block was not found on disk and not going to generate a
- new one, make sure there is a dummy block in place.
- */
- if(only_from_disk && (does_not_exist || lighting_expired))
- {
- //infostream<<"emergeBlock(): Was not on disk but not generating"<<std::endl;
-
- if(block == NULL)
- {
- // Create dummy block
- block = new MapBlock(this, p, true);
-
- // Add block to sector
- sector->insertBlock(block);
- }
- // Done.
- return block;
- }
-
- //infostream<<"Not found on disk, generating."<<std::endl;
- // 0ms
- //TimeTaker("emergeBlock() generate");
-
- //infostream<<"emergeBlock(): Didn't find valid block -> making one"<<std::endl;
-
- /*
- If the block doesn't exist, generate the block.
- */
- if(does_not_exist)
- {
- block = generateBlock(p, block, sector, changed_blocks,
- lighting_invalidated_blocks);
- }
-
- if(lighting_expired)
- {
- lighting_invalidated_blocks.insert(p, block);
- }
-
-#if 0
- /*
- Initially update sunlight
- */
- {
- core::map<v3s16, bool> light_sources;
- bool black_air_left = false;
- bool bottom_invalid =
- block->propagateSunlight(light_sources, true,
- &black_air_left);
-
- // If sunlight didn't reach everywhere and part of block is
- // above ground, lighting has to be properly updated
- //if(black_air_left && some_part_underground)
- if(black_air_left)
- {
- lighting_invalidated_blocks[block->getPos()] = block;
- }
-
- if(bottom_invalid)
- {
- lighting_invalidated_blocks[block->getPos()] = block;
- }
- }
-#endif
-
- return block;
-}
-#endif
-
s16 ServerMap::findGroundLevel(v2s16 p2d)
{
#if 0
throw FileNotGoodException("Cannot prepare write statement");
}
+ d = sqlite3_prepare(m_database, "SELECT `pos` FROM `blocks`", -1, &m_database_list, NULL);
+ if(d != SQLITE_OK) {
+ infostream<<"WARNING: Database list statment failed to prepare: "<<sqlite3_errmsg(m_database)<<std::endl;
+ throw FileNotGoodException("Cannot prepare read statement");
+ }
+
infostream<<"Server: Database opened"<<std::endl;
}
}
}
}
+static s32 unsignedToSigned(s32 i, s32 max_positive)
+{
+ if(i < max_positive)
+ return i;
+ else
+ return i - 2*max_positive;
+}
+
+// modulo of a negative number does not work consistently in C
+static sqlite3_int64 pythonmodulo(sqlite3_int64 i, sqlite3_int64 mod)
+{
+ if(i >= 0)
+ return i % mod;
+ return mod - ((-i) % mod);
+}
+
+v3s16 ServerMap::getIntegerAsBlock(sqlite3_int64 i)
+{
+ s32 x = unsignedToSigned(pythonmodulo(i, 4096), 2048);
+ i = (i - x) / 4096;
+ s32 y = unsignedToSigned(pythonmodulo(i, 4096), 2048);
+ i = (i - y) / 4096;
+ s32 z = unsignedToSigned(pythonmodulo(i, 4096), 2048);
+ return v3s16(x,y,z);
+}
+
+void ServerMap::listAllLoadableBlocks(core::list<v3s16> &dst)
+{
+ if(loadFromFolders()){
+ errorstream<<"Map::listAllLoadableBlocks(): Result will be missing "
+ <<"all blocks that are stored in flat files"<<std::endl;
+ }
+
+ {
+ verifyDatabase();
+
+ while(sqlite3_step(m_database_list) == SQLITE_ROW)
+ {
+ sqlite3_int64 block_i = sqlite3_column_int64(m_database_list, 0);
+ v3s16 p = getIntegerAsBlock(block_i);
+ //dstream<<"block_i="<<block_i<<" p="<<PP(p)<<std::endl;
+ dst.push_back(p);
+ }
+ }
+}
+
void ServerMap::saveMapMeta()
{
DSTACK(__FUNCTION_NAME);
projects / minetest.git / blobdiff