import { decoderError } from "../../encoding/encodings";
|
import { finished } from "../../encoding/finished";
|
import { end_of_stream, isASCIIByte } from "../../encoding/terminology";
|
/**
|
* @constructor
|
* @implements {Decoder}
|
* @param {!Array.<number>} index The encoding index.
|
* @param {{fatal: boolean}} options
|
*/
|
var SingleByteDecoder = /** @class */ (function () {
|
function SingleByteDecoder(index, options) {
|
this.index = index;
|
this.fatal = options.fatal;
|
}
|
/**
|
* @param {Stream} stream The stream of bytes being decoded.
|
* @param {number} bite The next byte read from the stream.
|
* @return {?(number|!Array.<number>)} The next code point(s)
|
* decoded, or null if not enough data exists in the input
|
* stream to decode a complete code point.
|
*/
|
SingleByteDecoder.prototype.handler = function (stream, bite) {
|
// 1. If byte is end-of-stream, return finished.
|
if (bite === end_of_stream)
|
return finished;
|
// 2. If byte is an ASCII byte, return a code point whose value
|
// is byte.
|
if (isASCIIByte(bite))
|
return bite;
|
// 3. Let code point be the index code point for byte − 0x80 in
|
// index single-byte.
|
var code_point = this.index[bite - 0x80];
|
// 4. If code point is null, return error.
|
if (!code_point)
|
return decoderError(this.fatal);
|
// 5. Return a code point whose value is code point.
|
return code_point;
|
};
|
return SingleByteDecoder;
|
}());
|
export { SingleByteDecoder };
|
//# sourceMappingURL=SingleByteDecoder.js.map
|
