XUserDefinedEncoder.js 1.6 KB

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  1. "use strict";
  2. Object.defineProperty(exports, "__esModule", { value: true });
  3. var encodings_1 = require("../../encoding/encodings");
  4. var finished_1 = require("../../encoding/finished");
  5. var terminology_1 = require("../../encoding/terminology");
  6. var utilities_1 = require("../../encoding/utilities");
  7. /**
  8. * @constructor
  9. * @implements {Encoder}
  10. * @param {{fatal: boolean}} options
  11. */
  12. var XUserDefinedEncoder = /** @class */ (function () {
  13. function XUserDefinedEncoder(options) {
  14. this.fatal = options.fatal;
  15. }
  16. /**
  17. * @param {Stream} stream Input stream.
  18. * @param {number} code_point Next code point read from the stream.
  19. * @return {(number|!Array.<number>)} Byte(s) to emit.
  20. */
  21. XUserDefinedEncoder.prototype.handler = function (stream, code_point) {
  22. // 1.If code point is end-of-stream, return finished.
  23. if (code_point === terminology_1.end_of_stream)
  24. return finished_1.finished;
  25. // 2. If code point is an ASCII code point, return a byte whose
  26. // value is code point.
  27. if (terminology_1.isASCIICodePoint(code_point))
  28. return code_point;
  29. // 3. If code point is in the range U+F780 to U+F7FF, inclusive,
  30. // return a byte whose value is code point − 0xF780 + 0x80.
  31. if (utilities_1.inRange(code_point, 0xF780, 0xF7FF))
  32. return code_point - 0xF780 + 0x80;
  33. // 4. Return error with code point.
  34. return encodings_1.encoderError(code_point);
  35. };
  36. return XUserDefinedEncoder;
  37. }());
  38. exports.XUserDefinedEncoder = XUserDefinedEncoder;
  39. //# sourceMappingURL=XUserDefinedEncoder.js.map