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Move some deserialization code around
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@ -114,10 +114,38 @@ function worldedit.serialize(pos1, pos2)
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return LATEST_SERIALIZATION_HEADER .. result, count
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end
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--- Loads the schematic in `value` into a node list in the latest format.
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-- Contains code based on [table.save/table.load](http://lua-users.org/wiki/SaveTableToFile)
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-- by ChillCode, available under the MIT license.
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local function deserialize_workaround(content)
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local nodes
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if not jit then
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nodes = minetest.deserialize(content)
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else
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-- XXX: This is a filthy hack that works surprisingly well
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-- in LuaJIT, `minetest.deserialize` will fail due to the register limit
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nodes = {}
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content = content:gsub("^%s*return%s*{", "", 1):gsub("}%s*$", "", 1) -- remove the starting and ending values to leave only the node data
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-- remove string contents strings while preserving their length
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local escaped = content:gsub("\\\\", "@@"):gsub("\\\"", "@@"):gsub("(\"[^\"]*\")", function(s) return string.rep("@", #s) end)
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local startpos, startpos1 = 1, 1
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local endpos
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while true do -- go through each individual node entry (except the last)
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startpos, endpos = escaped:find("},%s*{", startpos)
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if not startpos then
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break
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end
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local current = content:sub(startpos1, startpos)
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local entry = minetest.deserialize("return " .. current)
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table.insert(nodes, entry)
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startpos, startpos1 = endpos, endpos
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end
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local entry = minetest.deserialize("return " .. content:sub(startpos1)) -- process the last entry
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table.insert(nodes, entry)
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end
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return nodes
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end
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--- Loads the schematic in `value` into a node list in the latest format.
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-- @return A node list in the latest format, or nil on failure.
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local function load_schematic(value)
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local version, header, content = worldedit.read_header(value)
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@ -161,28 +189,7 @@ local function load_schematic(value)
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})
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end
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elseif version == 4 or version == 5 then -- Nested table format
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if not jit then
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-- This is broken for larger tables in the current version of LuaJIT
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nodes = minetest.deserialize(content)
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else
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-- XXX: This is a filthy hack that works surprisingly well - in LuaJIT, `minetest.deserialize` will fail due to the register limit
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nodes = {}
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content = content:gsub("return%s*{", "", 1):gsub("}%s*$", "", 1) -- remove the starting and ending values to leave only the node data
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local escaped = content:gsub("\\\\", "@@"):gsub("\\\"", "@@"):gsub("(\"[^\"]*\")", function(s) return string.rep("@", #s) end)
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local startpos, startpos1, endpos = 1, 1
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while true do -- go through each individual node entry (except the last)
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startpos, endpos = escaped:find("},%s*{", startpos)
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if not startpos then
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break
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end
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local current = content:sub(startpos1, startpos)
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local entry = minetest.deserialize("return " .. current)
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table.insert(nodes, entry)
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startpos, startpos1 = endpos, endpos
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end
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local entry = minetest.deserialize("return " .. content:sub(startpos1)) -- process the last entry
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table.insert(nodes, entry)
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end
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nodes = deserialize_workaround(content)
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else
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return nil
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end
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