import { encoderError } from "../../encoding/encodings";
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import { finished } from "../../encoding/finished";
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import { indexBig5PointerFor } from "../../encoding/indexes";
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import { end_of_stream, isASCIICodePoint } from "../../encoding/terminology";
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/**
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* @constructor
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* @implements {Encoder}
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* @param {{fatal: boolean}} options
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*/
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var Big5Encoder = /** @class */ (function () {
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function Big5Encoder(options) {
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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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Big5Encoder.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 === end_of_stream)
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return finished;
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// 2. If code point is an ASCII code point, return a byte whose
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// value is code point.
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if (isASCIICodePoint(code_point))
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return code_point;
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// 3. Let pointer be the index Big5 pointer for code point.
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var pointer = indexBig5PointerFor(code_point);
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// 4. If pointer is null, return error with code point.
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if (pointer === null)
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return encoderError(code_point);
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// 5. Let lead be Math.floor(pointer / 157) + 0x81.
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var lead = Math.floor(pointer / 157) + 0x81;
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// 6. If lead is less than 0xA1, return error with code point.
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if (lead < 0xA1)
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return encoderError(code_point);
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// 7. Let trail be pointer % 157.
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var trail = pointer % 157;
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// 8. Let offset be 0x40 if trail is less than 0x3F and 0x62
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// otherwise.
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var offset = trail < 0x3F ? 0x40 : 0x62;
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// Return two bytes whose values are lead and trail + offset.
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return [lead, trail + offset];
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};
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return Big5Encoder;
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}());
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export { Big5Encoder };
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//# sourceMappingURL=Big5Encoder.js.map
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