29 lines
981 B
TypeScript
29 lines
981 B
TypeScript
export default function unicodeToBytes(): { [key: string]: number } {
|
|
const bs: number[] = [
|
|
...Array.from({ length: 126 - 33 + 1 }, (_, i) => 33 + i), // range(ord("!"), ord("~") + 1)
|
|
...Array.from({ length: 172 - 161 + 1 }, (_, i) => 161 + i), // range(ord("¡"), ord("¬") + 1)
|
|
...Array.from({ length: 255 - 174 + 1 }, (_, i) => 174 + i) // range(ord("®"), ord("ÿ") + 1)
|
|
];
|
|
|
|
const cs: number[] = [...bs];
|
|
let n = 0;
|
|
|
|
for (let b = 0; b < 256; b++) {
|
|
if (!bs.includes(b)) {
|
|
bs.push(b);
|
|
cs.push(256 + n);
|
|
n++;
|
|
}
|
|
}
|
|
|
|
const csChars: string[] = cs.map(n => String.fromCharCode(n));
|
|
const originalMapping = Object.fromEntries(bs.map((b, i) => [b, csChars[i]]));
|
|
|
|
const reversedMapping: { [key: string]: number } = {};
|
|
for (const [key, value] of Object.entries(originalMapping)) {
|
|
reversedMapping[value] = Number(key);
|
|
}
|
|
|
|
return reversedMapping;
|
|
}
|