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Viewing file:     state.js (901 B)      -rw-r--r--

'use strict'

const { MathFloor, NumberIsInteger } = require('../../ours/primordials')
const { ERR_INVALID_ARG_VALUE } = require('../../ours/errors').codes
function highWaterMarkFrom(options, isDuplex, duplexKey) {
  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null
}
function getDefaultHighWaterMark(objectMode) {
  return objectMode ? 16 : 16 * 1024
}
function getHighWaterMark(state, options, duplexKey, isDuplex) {
  const hwm = highWaterMarkFrom(options, isDuplex, duplexKey)
  if (hwm != null) {
    if (!NumberIsInteger(hwm) || hwm < 0) {
      const name = isDuplex ? `options.${duplexKey}` : 'options.highWaterMark'
      throw new ERR_INVALID_ARG_VALUE(name, hwm)
    }
    return MathFloor(hwm)
  }

  // Default value
  return getDefaultHighWaterMark(state.objectMode)
}
module.exports = {
  getHighWaterMark,
  getDefaultHighWaterMark
}