tahamajs/IE / Projects /front /node_modules /@zxing /text-encoding /cjs /coders /euc-kr /EUCKRDecoder.js
| ; | |
| Object.defineProperty(exports, "__esModule", { value: true }); | |
| var encodings_1 = require("../../encoding/encodings"); | |
| var finished_1 = require("../../encoding/finished"); | |
| var indexes_1 = require("../../encoding/indexes"); | |
| var terminology_1 = require("../../encoding/terminology"); | |
| var utilities_1 = require("../../encoding/utilities"); | |
| /** | |
| * @constructor | |
| * @implements {Decoder} | |
| * @param {{fatal: boolean}} options | |
| */ | |
| var EUCKRDecoder = /** @class */ (function () { | |
| function EUCKRDecoder(options) { | |
| this.fatal = options.fatal; | |
| // euc-kr's decoder has an associated euc-kr lead (initially 0x00). | |
| /** @type {number} */ this.euckr_lead = 0x00; | |
| } | |
| /** | |
| * @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. | |
| */ | |
| EUCKRDecoder.prototype.handler = function (stream, bite) { | |
| // 1. If byte is end-of-stream and euc-kr lead is not 0x00, set | |
| // euc-kr lead to 0x00 and return error. | |
| if (bite === terminology_1.end_of_stream && this.euckr_lead !== 0) { | |
| this.euckr_lead = 0x00; | |
| return encodings_1.decoderError(this.fatal); | |
| } | |
| // 2. If byte is end-of-stream and euc-kr lead is 0x00, return | |
| // finished. | |
| if (bite === terminology_1.end_of_stream && this.euckr_lead === 0) | |
| return finished_1.finished; | |
| // 3. If euc-kr lead is not 0x00, let lead be euc-kr lead, let | |
| // pointer be null, set euc-kr lead to 0x00, and then run these | |
| // substeps: | |
| if (this.euckr_lead !== 0x00) { | |
| var lead = this.euckr_lead; | |
| var pointer = null; | |
| this.euckr_lead = 0x00; | |
| // 1. If byte is in the range 0x41 to 0xFE, inclusive, set | |
| // pointer to (lead − 0x81) × 190 + (byte − 0x41). | |
| if (utilities_1.inRange(bite, 0x41, 0xFE)) | |
| pointer = (lead - 0x81) * 190 + (bite - 0x41); | |
| // 2. Let code point be null, if pointer is null, and the | |
| // index code point for pointer in index euc-kr otherwise. | |
| var code_point = (pointer === null) | |
| ? null : indexes_1.indexCodePointFor(pointer, indexes_1.index('euc-kr')); | |
| // 3. If code point is null and byte is an ASCII byte, prepend | |
| // byte to stream. | |
| if (pointer === null && terminology_1.isASCIIByte(bite)) | |
| stream.prepend(bite); | |
| // 4. If code point is null, return error. | |
| if (code_point === null) | |
| return encodings_1.decoderError(this.fatal); | |
| // 5. Return a code point whose value is code point. | |
| return code_point; | |
| } | |
| // 4. If byte is an ASCII byte, return a code point whose value | |
| // is byte. | |
| if (terminology_1.isASCIIByte(bite)) | |
| return bite; | |
| // 5. If byte is in the range 0x81 to 0xFE, inclusive, set | |
| // euc-kr lead to byte and return continue. | |
| if (utilities_1.inRange(bite, 0x81, 0xFE)) { | |
| this.euckr_lead = bite; | |
| return null; | |
| } | |
| // 6. Return error. | |
| return encodings_1.decoderError(this.fatal); | |
| }; | |
| return EUCKRDecoder; | |
| }()); | |
| exports.EUCKRDecoder = EUCKRDecoder; | |
| //# sourceMappingURL=EUCKRDecoder.js.map |
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