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Diffstat (limited to 'table_save.lua')
| -rw-r--r-- | table_save.lua | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/table_save.lua b/table_save.lua new file mode 100644 index 0000000..cbc18ae --- /dev/null +++ b/table_save.lua @@ -0,0 +1,133 @@ +--[[ + Save Table to File + Load Table from File + v 1.0 + + Lua 5.2 compatible + + Only Saves Tables, Numbers and Strings + Insides Table References are saved + Does not save Userdata, Metatables, Functions and indices of these + ---------------------------------------------------- + table.save( table , filename ) + + on failure: returns an error msg + + ---------------------------------------------------- + table.load( filename or stringtable ) + + Loads a table that has been saved via the table.save function + + on success: returns a previously saved table + on failure: returns as second argument an error msg + ---------------------------------------------------- + + Licensed under the same terms as Lua itself. +]]-- +do + -- declare local variables + --// exportstring( string ) + --// returns a "Lua" portable version of the string + local function exportstring( s ) + return string.format("%q", s) + end + + --// The Save Function + function table.save( tbl,filename ) + local charS,charE = " ","\n" + local file,err = io.open( filename, "wb" ) + if err then return err end + + -- initiate variables for save procedure + local tables,lookup = { tbl },{ [tbl] = 1 } + file:write( "return {"..charE ) + + for idx,t in ipairs( tables ) do + file:write( "-- Table: {"..idx.."}"..charE ) + file:write( "{"..charE ) + local thandled = {} + + for i,v in ipairs( t ) do + thandled[i] = true + local stype = type( v ) + -- only handle value + if stype == "table" then + if not lookup[v] then + table.insert( tables, v ) + lookup[v] = #tables + end + file:write( charS.."{"..lookup[v].."},"..charE ) + elseif stype == "string" then + file:write( charS..exportstring( v )..","..charE ) + elseif stype == "number" then + file:write( charS..tostring( v )..","..charE ) + end + end + + for i,v in pairs( t ) do + -- escape handled values + if (not thandled[i]) then + + local str = "" + local stype = type( i ) + -- handle index + if stype == "table" then + if not lookup[i] then + table.insert( tables,i ) + lookup[i] = #tables + end + str = charS.."[{"..lookup[i].."}]=" + elseif stype == "string" then + str = charS.."["..exportstring( i ).."]=" + elseif stype == "number" then + str = charS.."["..tostring( i ).."]=" + end + + if str ~= "" then + stype = type( v ) + -- handle value + if stype == "table" then + if not lookup[v] then + table.insert( tables,v ) + lookup[v] = #tables + end + file:write( str.."{"..lookup[v].."},"..charE ) + elseif stype == "string" then + file:write( str..exportstring( v )..","..charE ) + elseif stype == "number" then + file:write( str..tostring( v )..","..charE ) + end + end + end + end + file:write( "},"..charE ) + end + file:write( "}" ) + file:close() + end + + --// The Load Function + function table.load( sfile ) + local ftables,err = loadfile( sfile ) + if err then return _,err end + local tables = ftables() + for idx = 1,#tables do + local tolinki = {} + for i,v in pairs( tables[idx] ) do + if type( v ) == "table" then + tables[idx][i] = tables[v[1]] + end + if type( i ) == "table" and tables[i[1]] then + table.insert( tolinki,{ i,tables[i[1]] } ) + end + end + -- link indices + for _,v in ipairs( tolinki ) do + tables[idx][v[2]],tables[idx][v[1]] = tables[idx][v[1]],nil + end + end + return tables[1] + end +-- close do +end +-- ChillCode
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