mirror of
https://github.com/Uberi/Minetest-WorldEdit.git
synced 2024-12-25 18:20:38 +01:00
133 lines
4.2 KiB
Lua
133 lines
4.2 KiB
Lua
--[[
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Save Table to File
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Load Table from File
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v 1.0
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Lua 5.2 compatible
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Only Saves Tables, Numbers and Strings
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Insides Table References are saved
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Does not save Userdata, Metatables, Functions and indices of these
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----------------------------------------------------
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table.save( table , filename )
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on failure: returns an error msg
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----------------------------------------------------
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table.load( filename or stringtable )
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Loads a table that has been saved via the table.save function
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on success: returns a previously saved table
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on failure: returns as second argument an error msg
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----------------------------------------------------
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Licensed under the same terms as Lua itself.
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]]--
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do
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-- declare local variables
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--// exportstring( string )
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--// returns a "Lua" portable version of the string
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local function exportstring( s )
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return string.format("%q", s)
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end
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--// The Save Function
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function table.save( tbl,filename )
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local charS,charE = " ","\n"
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local file,err = io.open( filename, "wb" )
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if err then return err end
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-- initiate variables for save procedure
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local tables,lookup = { tbl },{ [tbl] = 1 }
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file:write( "return {"..charE )
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for idx,t in ipairs( tables ) do
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file:write( "-- Table: {"..idx.."}"..charE )
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file:write( "{"..charE )
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local thandled = {}
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for i,v in ipairs( t ) do
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thandled[i] = true
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local stype = type( v )
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-- only handle value
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if stype == "table" then
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if not lookup[v] then
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table.insert( tables, v )
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lookup[v] = #tables
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end
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file:write( charS.."{"..lookup[v].."},"..charE )
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elseif stype == "string" then
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file:write( charS..exportstring( v )..","..charE )
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elseif stype == "number" then
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file:write( charS..tostring( v )..","..charE )
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end
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end
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for i,v in pairs( t ) do
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-- escape handled values
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if (not thandled[i]) then
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local str = ""
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local stype = type( i )
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-- handle index
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if stype == "table" then
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if not lookup[i] then
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table.insert( tables,i )
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lookup[i] = #tables
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end
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str = charS.."[{"..lookup[i].."}]="
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elseif stype == "string" then
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str = charS.."["..exportstring( i ).."]="
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elseif stype == "number" then
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str = charS.."["..tostring( i ).."]="
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end
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if str ~= "" then
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stype = type( v )
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-- handle value
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if stype == "table" then
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if not lookup[v] then
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table.insert( tables,v )
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lookup[v] = #tables
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end
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file:write( str.."{"..lookup[v].."},"..charE )
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elseif stype == "string" then
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file:write( str..exportstring( v )..","..charE )
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elseif stype == "number" then
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file:write( str..tostring( v )..","..charE )
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end
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end
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end
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end
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file:write( "},"..charE )
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end
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file:write( "}" )
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file:close()
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end
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--// The Load Function
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function table.load( sfile )
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local ftables,err = loadfile( sfile )
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if err then return _,err end
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local tables = ftables()
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for idx = 1,#tables do
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local tolinki = {}
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for i,v in pairs( tables[idx] ) do
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if type( v ) == "table" then
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tables[idx][i] = tables[v[1]]
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end
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if type( i ) == "table" and tables[i[1]] then
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table.insert( tolinki,{ i,tables[i[1]] } )
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end
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end
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-- link indices
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for _,v in ipairs( tolinki ) do
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tables[idx][v[2]],tables[idx][v[1]] = tables[idx][v[1]],nil
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end
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end
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return tables[1]
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end
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-- close do
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end
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-- ChillCode |