49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.toReadableStream = exports.startsWith = exports.appendLine = exports.createLineIterator = exports.CRLF = void 0;
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const stream_1 = require("stream");
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const LF = 0x0A;
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const CR = 0x0D;
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const CRLF_LENGTH = 2;
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exports.CRLF = Buffer.from([CR, LF]);
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function createLineIterator(buffer) {
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return {
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[Symbol.iterator]: function* () {
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const lastIdx = buffer.length - 1;
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let start = 0;
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for (let i = 0; i < buffer.length; i++) {
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if (i === lastIdx)
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yield buffer.slice(start);
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else if (buffer[i] === CR && buffer[i + 1] === LF) {
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yield buffer.slice(start, i);
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start = i + CRLF_LENGTH;
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}
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}
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},
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};
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}
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exports.createLineIterator = createLineIterator;
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function appendLine(lines, line) {
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if (lines.length)
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lines.push(exports.CRLF);
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lines.push(line);
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}
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exports.appendLine = appendLine;
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function startsWith(buffer, searchBuffer) {
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if (buffer.length < searchBuffer.length)
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return false;
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for (let i = 0; i < searchBuffer.length; i++) {
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if (buffer[i] !== searchBuffer[i])
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return false;
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}
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return true;
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}
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exports.startsWith = startsWith;
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function toReadableStream(buffer) {
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const stream = new stream_1.Readable();
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stream.push(buffer);
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stream.push(null);
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return stream;
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}
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exports.toReadableStream = toReadableStream;
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