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Convert between JS object and Node.js buffer

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rzcoder/data-struct

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Convert between JS object and Node.js buffer with rigidly predetermined scheme.

Installing

    npm install data-struct

Usage

require("data-struct") exports just 3 namespaces:

  • DataTypes – dictonary of supported types:
    • boolean – 1 byte
    • int8 – 1 byte
    • uint8 – 1 byte
    • int16 – 2 bytes
    • uint16 – 2 bytes
    • int32 – 4 bytes
    • uint32 – 4 bytes
    • float – 4 bytes
    • double – 8 bytes
    • string – 2 bytes header + string bytes length (max length: 65535 bytes,not string length!)
    • shortBuffer – 2 bytes header + buffer length (max length: 65535 bytes)
    • buffer – 4 bytes header + buffer length (max length 4294967295 bytes)
  • DataReader(buffer, scheme) – buffer -> object function.
  • DataWriter(object, scheme) – object -> buffer function.

Example

varDataTypes=require("data-struct").DataTypes;varDataReader=require("data-struct").DataReader;varDataWriter=require("data-struct").DataWriter;varhero={id:9,name:'CirnoBaka',hp:146,skills:[{id:34,description:'freezing frogs'},{id:16,description:'perfect math'}],playable:false,experience:99999999,position:{x:2,y:3}};varheroScheme={id:DataTypes.uint32,name:DataTypes.string,hp:DataTypes.int16,skills:[{id:DataTypes.uint16,description:DataTypes.string}],playable:DataTypes.boolean,experience:DataTypes.uint32,position:{x:DataTypes.uint16,y:DataTypes.uint16}};varheroBuf=DataWriter(hero,heroScheme);varheroClone=DataReader(heroBuf,heroScheme);//nested arraysvarmap=[[0,1,0,0,1,1,1,1],[1,1,0,0,0,1,1,1],[1,1,0,0,0,0,1,1],[1,1,1,1,0,0,1,1],[0,1,1,0,0,0,1,1],[0,0,0,0,0,1,1,1],[0,0,0,0,1,1,1,1]];varmapScheme=[[DataTypes.uint8]];varmapBuf=DataWriter(map,mapScheme);varmapClone=DataReader(mapBuf,mapScheme);

License

MIT

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