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749 BJavaScriptView Raw
1'use strict';
2
3var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
4
5function highWaterMarkFrom(options, isDuplex, duplexKey) {
6 return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
7}
8
9function getHighWaterMark(state, options, duplexKey, isDuplex) {
10 var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
11
12 if (hwm != null) {
13 if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
14 var name = isDuplex ? duplexKey : 'highWaterMark';
15 throw new ERR_INVALID_OPT_VALUE(name, hwm);
16 }
17
18 return Math.floor(hwm);
19 } // Default value
20
21
22 return state.objectMode ? 16 : 16 * 1024;
23}
24
25module.exports = {
26 getHighWaterMark: getHighWaterMark
27};
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