Add barcode-detector-api-polyfill dependency and update environment variable declarations in SvelteKit project
This commit is contained in:
+46
@@ -0,0 +1,46 @@
|
||||
import { encoderError } from "../../encoding/encodings";
|
||||
import { finished } from "../../encoding/finished";
|
||||
import { indexBig5PointerFor } from "../../encoding/indexes";
|
||||
import { end_of_stream, isASCIICodePoint } from "../../encoding/terminology";
|
||||
/**
|
||||
* @constructor
|
||||
* @implements {Encoder}
|
||||
* @param {{fatal: boolean}} options
|
||||
*/
|
||||
export class Big5Encoder {
|
||||
constructor(options) {
|
||||
this.fatal = options.fatal;
|
||||
}
|
||||
/**
|
||||
* @param {Stream} stream Input stream.
|
||||
* @param {number} code_point Next code point read from the stream.
|
||||
* @return {(number|!Array.<number>)} Byte(s) to emit.
|
||||
*/
|
||||
handler(stream, code_point) {
|
||||
// 1. If code point is end-of-stream, return finished.
|
||||
if (code_point === end_of_stream)
|
||||
return finished;
|
||||
// 2. If code point is an ASCII code point, return a byte whose
|
||||
// value is code point.
|
||||
if (isASCIICodePoint(code_point))
|
||||
return code_point;
|
||||
// 3. Let pointer be the index Big5 pointer for code point.
|
||||
const pointer = indexBig5PointerFor(code_point);
|
||||
// 4. If pointer is null, return error with code point.
|
||||
if (pointer === null)
|
||||
return encoderError(code_point);
|
||||
// 5. Let lead be Math.floor(pointer / 157) + 0x81.
|
||||
const lead = Math.floor(pointer / 157) + 0x81;
|
||||
// 6. If lead is less than 0xA1, return error with code point.
|
||||
if (lead < 0xA1)
|
||||
return encoderError(code_point);
|
||||
// 7. Let trail be pointer % 157.
|
||||
const trail = pointer % 157;
|
||||
// 8. Let offset be 0x40 if trail is less than 0x3F and 0x62
|
||||
// otherwise.
|
||||
const offset = trail < 0x3F ? 0x40 : 0x62;
|
||||
// Return two bytes whose values are lead and trail + offset.
|
||||
return [lead, trail + offset];
|
||||
}
|
||||
}
|
||||
//# sourceMappingURL=Big5Encoder.js.map
|
||||
Reference in New Issue
Block a user