@dashevo/dashcore-lib/lib/encoding/varint.js

A pure and powerful JavaScript Dash library.

/* eslint-disable */
// TODO: Remove previous line and work through linting issues at next edit

'use strict';

var BufferWriter = require('./bufferwriter');
var BufferReader = require('./bufferreader');
var BN = require('../crypto/bn');

var Varint = function Varint(buf) {
  if (!(this instanceof Varint)) return new Varint(buf);
  if (Buffer.isBuffer(buf)) {
    this.buf = buf;
  } else if (typeof buf === 'number') {
    var num = buf;
    this.fromNumber(num);
  } else if (buf instanceof BN) {
    var bn = buf;
    this.fromBN(bn);
  } else if (buf) {
    var obj = buf;
    this.set(obj);
  }
};

Varint.prototype.set = function (obj) {
  this.buf = obj.buf || this.buf;
  return this;
};

Varint.prototype.fromString = function (str) {
  this.set({
    buf: Buffer.from(str, 'hex'),
  });
  return this;
};

Varint.prototype.toString = function () {
  return this.buf.toString('hex');
};

Varint.prototype.fromBuffer = function (buf) {
  this.buf = buf;
  return this;
};

Varint.prototype.fromBufferReader = function (br) {
  this.buf = br.readVarintBuf();
  return this;
};

Varint.prototype.fromBN = function (bn) {
  this.buf = BufferWriter().writeVarintBN(bn).concat();
  return this;
};

Varint.prototype.fromNumber = function (num) {
  this.buf = BufferWriter().writeVarintNum(num).concat();
  return this;
};

Varint.prototype.toBuffer = function () {
  return this.buf;
};

Varint.prototype.toBN = function () {
  return BufferReader(this.buf).readVarintBN();
};

Varint.prototype.toNumber = function () {
  return BufferReader(this.buf).readVarintNum();
};

module.exports = Varint;