mirror of https://github.com/jkjoy/sunpeiwen.git
22 lines
745 B
JavaScript
22 lines
745 B
JavaScript
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'use strict';
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var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
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function highWaterMarkFrom(options, isDuplex, duplexKey) {
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return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
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}
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function getHighWaterMark(state, options, duplexKey, isDuplex) {
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var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
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if (hwm != null) {
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if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
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var name = isDuplex ? duplexKey : 'highWaterMark';
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throw new ERR_INVALID_OPT_VALUE(name, hwm);
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}
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return Math.floor(hwm);
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}
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// Default value
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return state.objectMode ? 16 : 16 * 1024;
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}
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module.exports = {
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getHighWaterMark: getHighWaterMark
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};
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