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New map directory structure that avoids map size being limited by filesystem

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This commit is contained in:
Ciaran Gultnieks 2011-05-18 16:48:27 +01:00
parent f1bdc6b187
commit e09fec3373
4 changed files with 111 additions and 47 deletions
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19
src/filesys.cpp
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@ -290,5 +290,24 @@ bool RecursiveDeleteContent(std::string path)
return true;
}
bool CreateAllDirs(std::string path)
{
size_t pos;
std::vector<std::string> tocreate;
std::string basepath = path;
while(!PathExists(basepath))
{
tocreate.push_back(basepath);
pos = basepath.rfind('/');
if(pos == std::string::npos)
return false;
basepath = basepath.substr(0,pos);
}
for(int i=tocreate.size()-1;i>=0;i--)
CreateDir(tocreate[i]);
return true;
}
} // namespace fs

3
src/filesys.h
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@ -38,6 +38,9 @@ std::vector<DirListNode> GetDirListing(std::string path);
// Returns true if already exists
bool CreateDir(std::string path);
// Create all directories on the given path that don't already exist.
bool CreateAllDirs(std::string path);
bool PathExists(std::string path);
// Only pass full paths to this one. True on success.

116
src/map.cpp
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@ -4875,9 +4875,9 @@ plan_b:
return (s16)level;
}
void ServerMap::createDir(std::string path)
void ServerMap::createDirs(std::string path)
{
if(fs::CreateDir(path) == false)
if(fs::CreateAllDirs(path) == false)
{
m_dout<<DTIME<<"ServerMap: Failed to create directory "
<<"\""<<path<<"\""<<std::endl;
@ -4885,29 +4885,52 @@ void ServerMap::createDir(std::string path)
}
}
std::string ServerMap::getSectorSubDir(v2s16 pos)
std::string ServerMap::getSectorDir(v2s16 pos, int layout)
{
char cc[9];
switch(layout)
{
case 1:
snprintf(cc, 9, "%.4x%.4x",
(unsigned int)pos.X&0xffff,
(unsigned int)pos.Y&0xffff);
return std::string(cc);
}
return m_savedir + "/sectors/" + cc;
case 2:
snprintf(cc, 9, "%.3x/%.3x",
(unsigned int)pos.X&0xfff,
(unsigned int)pos.Y&0xfff);
std::string ServerMap::getSectorDir(v2s16 pos)
{
return m_savedir + "/sectors/" + getSectorSubDir(pos);
return m_savedir + "/sectors2/" + cc;
default:
assert(false);
}
}
v2s16 ServerMap::getSectorPos(std::string dirname)
{
if(dirname.size() != 8)
throw InvalidFilenameException("Invalid sector directory name");
unsigned int x, y;
int r = sscanf(dirname.c_str(), "%4x%4x", &x, &y);
if(r != 2)
throw InvalidFilenameException("Invalid sector directory name");
int r;
size_t spos = dirname.rfind('/') + 1;
assert(spos != std::string::npos);
if(dirname.size() - spos == 8)
{
// Old layout
r = sscanf(dirname.substr(spos).c_str(), "%4x%4x", &x, &y);
}
else if(dirname.size() - spos == 3)
{
// New layout
r = sscanf(dirname.substr(spos-4).c_str(), "%3x/%3x", &x, &y);
// Sign-extend the 12 bit values up to 16 bits...
if(x&0x800) x|=0xF000;
if(y&0x800) y|=0xF000;
}
else
{
assert(false);
}
assert(r == 2);
v2s16 pos((s16)x, (s16)y);
return pos;
}
@ -5106,7 +5129,7 @@ void ServerMap::saveMapMeta()
<<"seed="<<m_seed<<", chunksize="<<m_chunksize
<<std::endl;
createDir(m_savedir);
createDirs(m_savedir);
std::string fullpath = m_savedir + "/map_meta.txt";
std::ofstream os(fullpath.c_str(), std::ios_base::binary);
@ -5179,7 +5202,7 @@ void ServerMap::saveChunkMeta()
dstream<<"INFO: ServerMap::saveChunkMeta(): Saving metadata of "
<<count<<" chunks"<<std::endl;
createDir(m_savedir);
createDirs(m_savedir);
std::string fullpath = m_savedir + "/chunk_meta";
std::ofstream os(fullpath.c_str(), std::ios_base::binary);
@ -5267,10 +5290,8 @@ void ServerMap::saveSectorMeta(ServerMapSector *sector)
u8 version = SER_FMT_VER_HIGHEST;
// Get destination
v2s16 pos = sector->getPos();
createDir(m_savedir);
createDir(m_savedir+"/sectors");
std::string dir = getSectorDir(pos);
createDir(dir);
createDirs(dir);
std::string fullpath = dir + "/meta";
std::ofstream o(fullpath.c_str(), std::ios_base::binary);
@ -5282,22 +5303,21 @@ void ServerMap::saveSectorMeta(ServerMapSector *sector)
sector->differs_from_disk = false;
}
MapSector* ServerMap::loadSectorMeta(std::string dirname)
MapSector* ServerMap::loadSectorMeta(std::string sectordir, bool save_after_load)
{
DSTACK(__FUNCTION_NAME);
// Get destination
v2s16 p2d = getSectorPos(dirname);
std::string dir = m_savedir + "/sectors/" + dirname;
v2s16 p2d = getSectorPos(sectordir);
ServerMapSector *sector = NULL;
std::string fullpath = dir + "/meta";
std::string fullpath = sectordir + "/meta";
std::ifstream is(fullpath.c_str(), std::ios_base::binary);
if(is.good() == false)
{
// If the directory exists anyway, it probably is in some old
// format. Just go ahead and create the sector.
if(fs::PathExists(dir))
if(fs::PathExists(sectordir))
{
dstream<<"ServerMap::loadSectorMeta(): Sector metafile "
<<fullpath<<" doesn't exist but directory does."
@ -5307,12 +5327,16 @@ MapSector* ServerMap::loadSectorMeta(std::string dirname)
m_sectors.insert(p2d, sector);
}
else
{
throw FileNotGoodException("Cannot open sector metafile");
}
}
else
{
sector = ServerMapSector::deSerialize
(is, this, p2d, m_sectors);
if(save_after_load)
saveSectorMeta(sector);
}
sector->differs_from_disk = false;
@ -5323,14 +5347,31 @@ MapSector* ServerMap::loadSectorMeta(std::string dirname)
bool ServerMap::loadSectorFull(v2s16 p2d)
{
DSTACK(__FUNCTION_NAME);
std::string sectorsubdir = getSectorSubDir(p2d);
MapSector *sector = NULL;
// The directory layout we're going to load from.
// 1 - original sectors/xxxxzzzz/
// 2 - new sectors2/xxx/zzz/
// If we load from anything but the latest structure, we will
// immediately save to the new one, and remove the old.
int loadlayout = 1;
std::string sectordir1 = getSectorDir(p2d, 1);
std::string sectordir;
if(fs::PathExists(sectordir1))
{
sectordir = sectordir1;
}
else
{
loadlayout = 2;
sectordir = getSectorDir(p2d, 2);
}
//JMutexAutoLock lock(m_sector_mutex); // Bulk comment-out
try{
sector = loadSectorMeta(sectorsubdir);
sector = loadSectorMeta(sectordir, loadlayout != 2);
}
catch(InvalidFilenameException &e)
{
@ -5349,7 +5390,7 @@ bool ServerMap::loadSectorFull(v2s16 p2d)
Load blocks
*/
std::vector<fs::DirListNode> list2 = fs::GetDirListing
(m_savedir+"/sectors/"+sectorsubdir);
(sectordir);
std::vector<fs::DirListNode>::iterator i2;
for(i2=list2.begin(); i2!=list2.end(); i2++)
{
@ -5357,16 +5398,25 @@ bool ServerMap::loadSectorFull(v2s16 p2d)
if(i2->dir)
continue;
try{
loadBlock(sectorsubdir, i2->name, sector);
loadBlock(sectordir, i2->name, sector, loadlayout != 2);
}
catch(InvalidFilenameException &e)
{
// This catches unknown crap in directory
}
}
if(loadlayout != 2)
{
dstream<<"Sector converted to new layout - deleting "<<
sectordir1<<std::endl;
fs::RecursiveDelete(sectordir1);
}
return true;
}
void ServerMap::saveBlock(MapBlock *block)
{
DSTACK(__FUNCTION_NAME);
@ -5386,12 +5436,9 @@ void ServerMap::saveBlock(MapBlock *block)
// Get destination
v3s16 p3d = block->getPos();
v2s16 p2d(p3d.X, p3d.Z);
createDir(m_savedir);
createDir(m_savedir+"/sectors");
std::string dir = getSectorDir(p2d);
createDir(dir);
createDirs(dir);
// Block file is map/sectors/xxxxxxxx/xxxx
char cc[5];
snprintf(cc, 5, "%.4x", (unsigned int)p3d.Y&0xffff);
std::string fullpath = dir + "/" + cc;
@ -5427,12 +5474,11 @@ void ServerMap::saveBlock(MapBlock *block)
block->resetChangedFlag();
}
void ServerMap::loadBlock(std::string sectordir, std::string blockfile, MapSector *sector)
void ServerMap::loadBlock(std::string sectordir, std::string blockfile, MapSector *sector, bool save_after_load)
{
DSTACK(__FUNCTION_NAME);
// Block file is map/sectors/xxxxxxxx/xxxx
std::string fullpath = m_savedir+"/sectors/"+sectordir+"/"+blockfile;
std::string fullpath = sectordir+"/"+blockfile;
try{
std::ifstream is(fullpath.c_str(), std::ios_base::binary);
@ -5496,7 +5542,7 @@ void ServerMap::loadBlock(std::string sectordir, std::string blockfile, MapSecto
*/
// Save old format blocks in new format
if(version < SER_FMT_VER_HIGHEST)
if(version < SER_FMT_VER_HIGHEST || save_after_load)
{
saveBlock(block);
}

12
src/map.h
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@ -545,13 +545,9 @@ public:
Misc. helper functions for fiddling with directory and file
names when saving
*/
void createDir(std::string path);
void createSaveDir();
// returns something like "xxxxxxxx"
std::string getSectorSubDir(v2s16 pos);
void createDirs(std::string path);
// returns something like "map/sectors/xxxxxxxx"
std::string getSectorDir(v2s16 pos);
std::string createSectorDir(v2s16 pos);
std::string getSectorDir(v2s16 pos, int layout = 2);
// dirname: final directory name
v2s16 getSectorPos(std::string dirname);
v3s16 getBlockPos(std::string sectordir, std::string blockfile);
@ -572,7 +568,7 @@ public:
// (no MapBlocks)
// DEPRECATED? Sectors have no metadata anymore.
void saveSectorMeta(ServerMapSector *sector);
MapSector* loadSectorMeta(std::string dirname);
MapSector* loadSectorMeta(std::string dirname, bool save_after_load);
// Full load of a sector including all blocks.
// returns true on success, false on failure.
@ -583,7 +579,7 @@ public:
void saveBlock(MapBlock *block);
// This will generate a sector with getSector if not found.
void loadBlock(std::string sectordir, std::string blockfile, MapSector *sector);
void loadBlock(std::string sectordir, std::string blockfile, MapSector *sector, bool save_after_load=false);
// For debug printing
virtual void PrintInfo(std::ostream &out);