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'use strict';
const {
MathFloor,
NumberIsInteger,
} = primordials;
const { validateInteger } = require('internal/validators');
const { ERR_INVALID_ARG_VALUE } = require('internal/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,
};
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