ext-packer.js

// ext-packer.js

exports.setExtPackers = setExtPackers;

var Bufferish = require("./bufferish");
var Buffer = Bufferish.global;
var packTypedArray = Bufferish.Uint8Array.from;
var _encode;

var ERROR_COLUMNS = {name: 1, message: 1, stack: 1, columnNumber: 1, fileName: 1, lineNumber: 1};

function setExtPackers(codec) {
  codec.addExtPacker(0x0E, Error, [packError, encode]);
  codec.addExtPacker(0x01, EvalError, [packError, encode]);
  codec.addExtPacker(0x02, RangeError, [packError, encode]);
  codec.addExtPacker(0x03, ReferenceError, [packError, encode]);
  codec.addExtPacker(0x04, SyntaxError, [packError, encode]);
  codec.addExtPacker(0x05, TypeError, [packError, encode]);
  codec.addExtPacker(0x06, URIError, [packError, encode]);

  codec.addExtPacker(0x0A, RegExp, [packRegExp, encode]);
  codec.addExtPacker(0x0B, Boolean, [packValueOf, encode]);
  codec.addExtPacker(0x0C, String, [packValueOf, encode]);
  codec.addExtPacker(0x0D, Date, [Number, encode]);
  codec.addExtPacker(0x0F, Number, [packValueOf, encode]);

  if ("undefined" !== typeof Uint8Array) {
    codec.addExtPacker(0x11, Int8Array, packTypedArray);
    codec.addExtPacker(0x12, Uint8Array, packTypedArray);
    codec.addExtPacker(0x13, Int16Array, packTypedArray);
    codec.addExtPacker(0x14, Uint16Array, packTypedArray);
    codec.addExtPacker(0x15, Int32Array, packTypedArray);
    codec.addExtPacker(0x16, Uint32Array, packTypedArray);
    codec.addExtPacker(0x17, Float32Array, packTypedArray);

    // PhantomJS/1.9.7 doesn't have Float64Array
    if ("undefined" !== typeof Float64Array) {
      codec.addExtPacker(0x18, Float64Array, packTypedArray);
    }

    // IE10 doesn't have Uint8ClampedArray
    if ("undefined" !== typeof Uint8ClampedArray) {
      codec.addExtPacker(0x19, Uint8ClampedArray, packTypedArray);
    }

    codec.addExtPacker(0x1A, ArrayBuffer, packTypedArray);
    codec.addExtPacker(0x1D, DataView, packTypedArray);
  }

  if (Bufferish.hasBuffer) {
    codec.addExtPacker(0x1B, Buffer, Bufferish.from);
  }
}

function encode(input) {
  if (!_encode) _encode = require("./encode").encode; // lazy load
  return _encode(input);
}

function packValueOf(value) {
  return (value).valueOf();
}

function packRegExp(value) {
  value = RegExp.prototype.toString.call(value).split("/");
  value.shift();
  var out = [value.pop()];
  out.unshift(value.join("/"));
  return out;
}

function packError(value) {
  var out = {};
  for (var key in ERROR_COLUMNS) {
    out[key] = value[key];
  }
  return out;
}