Method performEncode

src/Encoder/Integer.js:95–147

* Performs encode on given content. * @protected * @param {Chain} content * @return {number[]|string|Uint8Array|Chain|Promise} Encoded content

(content)

   * @return {number[]|string|Uint8Array|Chain|Promise} Encoded content
   */
  performEncode (content) {
    const typeName = this.getSettingValue('type')
    const typeIndex = typeNames.indexOf(typeName)
    const bytesPerInteger = typeBytes[typeIndex]
    const isBigEndian = this.getSettingValue('byteOrder') === 'big-endian'

    let size = content.getSize()
    if (size % bytesPerInteger !== 0) {
      size += bytesPerInteger - size % bytesPerInteger
    }

    const bytes = new Uint8Array(size)
    bytes.set(content.getBytes())

    // Collect integers
    const integers = this.createIntegerTypeArray(
      size / bytesPerInteger, typeName)
    let integer = 0
    let i = 0
    while (i < bytes.length) {
      if (isBigEndian) {
        integer = (integer << 8) | bytes[i]
      } else {
        integer = integer | bytes[i] << (i % bytesPerInteger * 8)
      }
      if (++i % bytesPerInteger === 0) {
        integers[i / bytesPerInteger - 1] = integer
        integer = 0
      }
    }

    // Convert integers to strings
    const format = this.getSettingValue('format')
    const integerStrings = []

    for (i = 0; i < integers.length; i++) {
      switch (format) {
        case 'binary':
          integerStrings.push(integers[i].toString(2))
          break
        case 'octal':
          integerStrings.push(integers[i].toString(8))
          break
        case 'decimal':
          integerStrings.push(integers[i].toString(10))
          break
        default:
          integerStrings.push(integers[i].toString(16))
      }
    }

    return integerStrings.join(' ')
  }

  /**
   * Performs decode on given content.