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-rw-r--r--advtrains/init.lua13
-rw-r--r--advtrains/nodedb.lua134
2 files changed, 101 insertions, 46 deletions
diff --git a/advtrains/init.lua b/advtrains/init.lua
index cccb2da..3c3e47b 100644
--- a/advtrains/init.lua
+++ b/advtrains/init.lua
@@ -307,7 +307,7 @@ function advtrains.avt_load()
end
advtrains.wagons = tbl.wagon_save
advtrains.player_to_train_mapping = tbl.ptmap or {}
- advtrains.ndb.load_data(tbl.ndb)
+ advtrains.ndb.load_data_pre_v4(tbl.ndb)
advtrains.atc.load_data(tbl.atc)
if advtrains.interlocking then
advtrains.interlocking.db.load(tbl.interlocking)
@@ -382,7 +382,6 @@ function advtrains.load_version_4()
end
advtrains.wagons = at_save.wagons
advtrains.player_to_train_mapping = at_save.ptmap or {}
- advtrains.ndb.load_data(at_save.ndb)
advtrains.atc.load_data(at_save.atc)
--remove wagon_save entries that are not part of a train
@@ -398,6 +397,9 @@ function advtrains.load_version_4()
advtrains.wagon_save[wid]=nil
end
end
+ --== load ndb
+ serialize_lib.load_atomic(advtrains.fpath.."_ndb4.ls", advtrains.ndb.load_callback)
+
--== load interlocking ==
if advtrains.interlocking then
local il_save = serialize_lib.load_atomic(advtrains.fpath.."_interlocking.ls")
@@ -498,7 +500,6 @@ advtrains.avt_save = function(remove_players_from_wagons)
wagons = advtrains.wagons,
ptmap = advtrains.player_to_train_mapping,
atc = advtrains.atc.save_data(),
- ndb = advtrains.ndb.save_data(),-- side effect: this saves advtrains_ndb file
}
--save of interlocking
@@ -530,10 +531,14 @@ advtrains.avt_save = function(remove_players_from_wagons)
["interlocking.ls"] = il_save,
["lines.ls"] = ln_save,
["atlatc.ls"] = la_save,
+ ["ndb4.ls"] = true, -- data not used
+ }
+ local callbacks_table = {
+ ["ndb4.ls"] = advtrains.ndb.save_callback
}
--THE MAGIC HAPPENS HERE
- local succ, err = serialize_lib.save_atomic_multiple(parts_table, advtrains.fpath.."_")
+ local succ, err = serialize_lib.save_atomic_multiple(parts_table, advtrains.fpath.."_", callbacks_table)
if not succ then
atwarn("Saving failed: "..err)
diff --git a/advtrains/nodedb.lua b/advtrains/nodedb.lua
index 03a5a2d..531979e 100644
--- a/advtrains/nodedb.lua
+++ b/advtrains/nodedb.lua
@@ -52,11 +52,14 @@ local function ndbset(x,y,z,v)
ndb_nodes[y][x][z]=v
end
+-- load/save
-local path=minetest.get_worldpath()..DIR_DELIM.."advtrains_ndb2"
---load
+local path_pre_v4=minetest.get_worldpath()..DIR_DELIM.."advtrains_ndb2"
+--load pre_v4 format
--nodeids get loaded by advtrains init.lua and passed here
-function ndb.load_data(data)
+function ndb.load_data_pre_v4(data)
+ atlog("nodedb: Loading pre v4 format")
+
ndb_nodeids = data and data.nodeids or {}
ndb_ver = data and data.ver or 0
if ndb_ver < 1 then
@@ -68,10 +71,11 @@ function ndb.load_data(data)
end
end
end
- local file, err = io.open(path, "rb")
+ local file, err = io.open(path_pre_v4, "rb")
if not file then
atwarn("Couldn't load the node database: ", err or "Unknown Error")
else
+ -- Note: code duplication because of weird coordinate order in ndb2 format (z,y,x)
local cnt=0
local hst_z=file:read(2)
local hst_y=file:read(2)
@@ -88,58 +92,104 @@ function ndb.load_data(data)
hst_x=file:read(2)
cid=file:read(2)
end
- atlog("nodedb: read", cnt, "nodes.")
+ atlog("nodedb (ndb2 format): read", cnt, "nodes.")
file:close()
end
ndb_ver = 1
end
-local windows_compat = false
---save
-function ndb.save_data()
- local tmppath = path.."~"
- local file, err
- if windows_compat then
- -- open ndb file directly
- file, err = io.open(path, "wb")
- else
- -- open another file next to it, then replace atomically
- file, err = io.open(tmppath, "wb")
+-- the new ndb file format is backported from cellworld, and stores the cids also in the ndb file.
+-- These functions have the form of a serialize_lib atomic load/save callback and are called from avt_save/avt_load.
+function ndb.load_callback(file)
+ -- read version
+ local vers_byte = file:read(1)
+ local version = string.byte(vers_byte)
+ if version~=1 then
+ file:close()
+ error("Doesn't support v4 nodedb file of version "..version)
end
- if not file then
- atwarn("Couldn't save the node database: ", err or "Unknown Error")
- else
- for y, ny in pairs(ndb_nodes) do
- for x, nx in pairs(ny) do
- for z, cid in pairs(nx) do
- file:write(int_to_bytes(z))
- file:write(int_to_bytes(y))
- file:write(int_to_bytes(x))
- file:write(int_to_bytes(cid))
- end
- end
+ -- read cid mappings
+ local nstr_byte = file:read(2)
+ local nstr = bytes_to_int(nstr_byte)
+ for i = 1,nstr do
+ local stid_byte = file:read(2)
+ local stid = bytes_to_int(stid_byte)
+ local stna = file:read("*l")
+ --atdebug("content id:", stid, "->", stna)
+ ndb_nodeids[stid] = stna
+ end
+ atlog("[nodedb] read", nstr, "node content ids.")
+
+ -- read nodes
+ local cnt=0
+ local hst_x=file:read(2)
+ local hst_y=file:read(2)
+ local hst_z=file:read(2)
+ local cid=file:read(2)
+ local cidi
+ while hst_z and hst_y and hst_x and cid and #hst_z==2 and #hst_y==2 and #hst_x==2 and #cid==2 do
+ cidi = bytes_to_int(cid)
+ -- prevent file corruption already here
+ if not ndb_nodeids[u14b(cidi)] then
+ -- clear the ndb data, to reinitialize it
+ -- in strict loading mode, doesn't matter as starting will be interrupted anyway
+ ndb_nodeids = {}
+ ndb_nodes = {}
+ error("NDB file is corrupted (found entry with invalid cid)")
end
- file:close()
+ ndbset(bytes_to_int(hst_x), bytes_to_int(hst_y), bytes_to_int(hst_z), cidi)
+ cnt=cnt+1
+ hst_x=file:read(2)
+ hst_y=file:read(2)
+ hst_z=file:read(2)
+ cid=file:read(2)
end
+ atlog("[nodedb] read", cnt, "nodes.")
+ file:close()
+end
+
+--save
+function ndb.save_callback(data, file)
+ --atdebug("storing ndb...")
+ -- write version
+ file:write(string.char(1))
- if not windows_compat then
- local success, msg = os.rename(tmppath, path)
- --local success, msg = nil, "test"
- -- for windows, this fails if the file already exists. Enable windows compatibility and directly write to path.
- if not success then
- atlog("Replacing the nodedb file atomically failed:",msg)
- atlog("Switching to Windows mode (will directly overwrite the nodedb file from now on)")
- windows_compat = true
- os.remove(tmppath)
- -- try again
- ndb.save_data()
- end
+ -- how many cid entries
+ local cnt = 0
+ for _,_ in pairs(ndb_nodeids) do
+ cnt = cnt + 1
+ end
+ -- write cids
+ local nstr = 0
+ file:write(int_to_bytes(cnt))
+ for stid,stna in pairs(ndb_nodeids) do
+ file:write(int_to_bytes(stid))
+ file:write(stna)
+ file:write("\n")
+ nstr = nstr+1
end
+ --atdebug("saved cids count ", nstr)
- return {nodeids = ndb_nodeids, ver = ndb_ver}
+ -- write entries
+ local cnt = 0
+ for y, ny in pairs(ndb_nodes) do
+ for x, nx in pairs(ny) do
+ for z, cid in pairs(nx) do
+ file:write(int_to_bytes(x))
+ file:write(int_to_bytes(y))
+ file:write(int_to_bytes(z))
+ file:write(int_to_bytes(cid))
+ cnt=cnt+1
+ end
+ end
+ end
+ --atdebug("saved nodes count ", cnt)
+ file:close()
end
+
+
--function to get node. track database is not helpful here.
function ndb.get_node_or_nil(pos)
-- FIX for bug found on linuxworks server:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-31 12:20:34 +0000