"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var finished_1 = require("../../encoding/finished");
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var terminology_1 = require("../../encoding/terminology");
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var utilities_1 = require("../../encoding/utilities");
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var converCodeUnitToBytes_1 = require("./converCodeUnitToBytes");
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/**
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* @constructor
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* @implements {Encoder}
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* @param {boolean} utf16_be True if big-endian, false if little-endian.
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* @param {{fatal: boolean}} options
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*/
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var UTF16Encoder = /** @class */ (function () {
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function UTF16Encoder(utf16_be, options) {
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this.utf16_be = utf16_be;
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this.fatal = options.fatal;
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}
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/**
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* @param {Stream} stream Input stream.
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* @param {number} code_point Next code point read from the stream.
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* @return {(number|!Array.<number>)} Byte(s) to emit.
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*/
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UTF16Encoder.prototype.handler = function (stream, code_point) {
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// 1. If code point is end-of-stream, return finished.
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if (code_point === terminology_1.end_of_stream)
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return finished_1.finished;
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// 2. If code point is in the range U+0000 to U+FFFF, inclusive,
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// return the sequence resulting of converting code point to
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// bytes using utf-16be encoder flag.
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if (utilities_1.inRange(code_point, 0x0000, 0xFFFF))
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return converCodeUnitToBytes_1.convertCodeUnitToBytes(code_point, this.utf16_be);
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// 3. Let lead be ((code point − 0x10000) >> 10) + 0xD800,
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// converted to bytes using utf-16be encoder flag.
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var lead = converCodeUnitToBytes_1.convertCodeUnitToBytes(((code_point - 0x10000) >> 10) + 0xD800, this.utf16_be);
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// 4. Let trail be ((code point − 0x10000) & 0x3FF) + 0xDC00,
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// converted to bytes using utf-16be encoder flag.
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var trail = converCodeUnitToBytes_1.convertCodeUnitToBytes(((code_point - 0x10000) & 0x3FF) + 0xDC00, this.utf16_be);
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// 5. Return a byte sequence of lead followed by trail.
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return lead.concat(trail);
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};
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return UTF16Encoder;
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}());
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exports.UTF16Encoder = UTF16Encoder;
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//# sourceMappingURL=UTF16Encoder.js.map
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