frakt-client
Version:
Client library for interacting with FRAKT solana program
64 lines (63 loc) • 2.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.fromUTF8Array = exports.toUTF8Array = void 0;
// credit https://stackoverflow.com/questions/18729405/how-to-convert-utf8-string-to-byte-array
function toUTF8Array(str) {
let utf8 = [];
for (let i = 0; i < str.length; i++) {
let charcode = str.charCodeAt(i);
if (charcode < 0x80)
utf8.push(charcode);
else if (charcode < 0x800) {
utf8.push(0xc0 | (charcode >> 6), 0x80 | (charcode & 0x3f));
}
else if (charcode < 0xd800 || charcode >= 0xe000) {
utf8.push(0xe0 | (charcode >> 12), 0x80 | ((charcode >> 6) & 0x3f), 0x80 | (charcode & 0x3f));
}
// surrogate pair
else {
i++;
// UTF-16 encodes 0x10000-0x10FFFF by
// subtracting 0x10000 and splitting the
// 20 bits of 0x0-0xFFFFF into two halves
charcode =
0x10000 + (((charcode & 0x3ff) << 10) | (str.charCodeAt(i) & 0x3ff));
utf8.push(0xf0 | (charcode >> 18), 0x80 | ((charcode >> 12) & 0x3f), 0x80 | ((charcode >> 6) & 0x3f), 0x80 | (charcode & 0x3f));
}
}
return utf8;
}
exports.toUTF8Array = toUTF8Array;
//courtesy https://gist.github.com/joni/3760795
function fromUTF8Array(data) {
// array of bytes
let str = '', i;
for (i = 0; i < data.length; i++) {
const value = data[i];
if (value < 0x80) {
str += String.fromCharCode(value);
}
else if (value > 0xbf && value < 0xe0) {
str += String.fromCharCode(((value & 0x1f) << 6) | (data[i + 1] & 0x3f));
i += 1;
}
else if (value > 0xdf && value < 0xf0) {
str += String.fromCharCode(((value & 0x0f) << 12) |
((data[i + 1] & 0x3f) << 6) |
(data[i + 2] & 0x3f));
i += 2;
}
else {
// surrogate pair
const charCode = (((value & 0x07) << 18) |
((data[i + 1] & 0x3f) << 12) |
((data[i + 2] & 0x3f) << 6) |
(data[i + 3] & 0x3f)) -
0x010000;
str += String.fromCharCode((charCode >> 10) | 0xd800, (charCode & 0x03ff) | 0xdc00);
i += 3;
}
}
return str;
}
exports.fromUTF8Array = fromUTF8Array;