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35 lines
1.3 KiB
JavaScript
35 lines
1.3 KiB
JavaScript
import { encoderError } from "../../encoding/encodings";
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import { finished } from "../../encoding/finished";
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import { end_of_stream, isASCIICodePoint } from "../../encoding/terminology";
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import { inRange } from "../../encoding/utilities";
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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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export class XUserDefinedEncoder {
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constructor(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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handler(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. If code point is in the range U+F780 to U+F7FF, inclusive,
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// return a byte whose value is code point − 0xF780 + 0x80.
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if (inRange(code_point, 0xF780, 0xF7FF))
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return code_point - 0xF780 + 0x80;
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// 4. Return error with code point.
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return encoderError(code_point);
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}
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}
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//# sourceMappingURL=XUserDefinedEncoder.js.map
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