IOTConnect-Web/node_modules/readable-stream/lib/internal/streams/state.js

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2024-05-09 01:49:52 +00:00
'use strict'
const { MathFloor, NumberIsInteger } = require('../../ours/primordials')
const { validateInteger } = require('../validators')
const { ERR_INVALID_ARG_VALUE } = require('../../ours/errors').codes
let defaultHighWaterMarkBytes = 16 * 1024
let defaultHighWaterMarkObjectMode = 16
function highWaterMarkFrom(options, isDuplex, duplexKey) {
return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null
}
function getDefaultHighWaterMark(objectMode) {
return objectMode ? defaultHighWaterMarkObjectMode : defaultHighWaterMarkBytes
}
function setDefaultHighWaterMark(objectMode, value) {
validateInteger(value, 'value', 0)
if (objectMode) {
defaultHighWaterMarkObjectMode = value
} else {
defaultHighWaterMarkBytes = value
}
}
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,
setDefaultHighWaterMark
}