Function parse

index.js:203–263

(instance, interval)

}

function parse (instance, interval) {
  if (!interval) {
    return
  }

  position.value = 0

  let currentValue
  let nextNegative = 1

  while (position.value < interval.length) {
    const char = interval[position.value]

    if (char === '-') {
      nextNegative = -1
      position.value++
      continue
    } else if (!(char >= '0' && char <= '9')) {
      position.value++
      continue
    } else {
      currentValue = readNextNum(interval)

      if (interval[position.value] === ':') {
        instance.hours = currentValue ? nextNegative * currentValue : 0

        position.value++
        currentValue = readNextNum(interval)
        instance.minutes = currentValue ? nextNegative * currentValue : 0

        position.value++
        currentValue = readNextNum(interval)
        instance.seconds = currentValue ? nextNegative * currentValue : 0

        if (interval[position.value] === '.') {
          position.value++

          currentValue = parseMillisecond(interval)
          instance.milliseconds = currentValue ? nextNegative * currentValue : 0
        }

        return
      }

      // skip space
      position.value++

      const unit = interval[position.value]

      if (unit === 'y') {
        instance.years = currentValue ? nextNegative * currentValue : 0
      } else if (unit === 'm') {
        instance.months = currentValue ? nextNegative * currentValue : 0
      } else if (unit === 'd') {
        instance.days = currentValue ? nextNegative * currentValue : 0
      }

      nextNegative = 1