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codex.js
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codex.js
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// interface Codex {
// string(arr: Uint8Array|number[]): string;
// bytes(str: string): Uint8Array;
// }
export const hex = {
string(array) {
return Array.from(array, x => x.toString(16).padStart(2, '0')).join('');
},
bytes(str) {
return Uint8Array.from(new Array(str.length >>> 1).fill(0).map((_, i) => {
const digits = str.substring(i << 1, (i + 1) << 1);
const byte = Number.parseInt(digits, 16);
if (isNaN(byte)) throw new Error(`Invalid hex digits: ${digits}`);
return byte;
}));
},
};
export const utf8 = {
string(array) {
if (Array.isArray(array)) array = Uint8Array.from(array);
return new TextDecoder('utf-8').decode(array);
},
bytes(str) {
return new TextEncoder('utf-8').encode(str);
},
};
export const b64 = {
string(array) {
return btoa(String.fromCharCode(...array));
},
bytes(str) {
const bin = atob(str);
return Uint8Array.from(
new Array(bin.length).fill(0).map((_, i) => bin.charCodeAt(i)));
},
};