37 lines
933 B
JavaScript
37 lines
933 B
JavaScript
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var util = require('util');
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var stream = require('stream');
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var Transform = stream.Transform;
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module.exports = StreamOfLines;
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function StreamOfLines(options) {
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Transform.call(this, options);
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this._prevChunks = [];
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this._hasPrevChunks = false;
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}
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util.inherits(StreamOfLines, Transform);
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StreamOfLines.prototype._transform = function(chunk, encoding, callback) {
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chunk = chunk.toString();
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var fromIndex = 0;
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var newLineIndex;
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while ((newLineIndex = chunk.indexOf('\n', fromIndex)) != -1) {
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var line;
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if (this._hasPrevChunks) {
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line = this._prevChunks.join('') + chunk.substring(fromIndex, newLineIndex);
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this._prevChunks = [];
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this._hasPrevChunks = false;
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} else {
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line = chunk.substring(fromIndex, newLineIndex);
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}
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fromIndex = newLineIndex + 1;
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this.push(line);
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}
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if (fromIndex < chunk.length) {
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this._prevChunks.push(chunk.substring(fromIndex));
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this._hasPrevChunks = true;
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}
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callback();
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}
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