@tldraw/utils
Version:
tldraw infinite canvas SDK (private utilities).
36 lines (35 loc) • 1.03 kB
JavaScript
function getHashForString(string) {
let hash = 0;
for (let i = 0; i < string.length; i++) {
hash = (hash << 5) - hash + string.charCodeAt(i);
hash |= 0;
}
return hash + "";
}
function getHashForObject(obj) {
return getHashForString(JSON.stringify(obj));
}
function getHashForBuffer(buffer) {
const view = new DataView(buffer);
let hash = 0;
for (let i = 0; i < view.byteLength; i++) {
hash = (hash << 5) - hash + view.getUint8(i);
hash |= 0;
}
return hash + "";
}
function lns(str) {
const result = str.split("");
result.push(...result.splice(0, Math.round(result.length / 5)));
result.push(...result.splice(0, Math.round(result.length / 4)));
result.push(...result.splice(0, Math.round(result.length / 3)));
result.push(...result.splice(0, Math.round(result.length / 2)));
return result.reverse().map((n) => +n ? +n < 5 ? 5 + +n : +n > 5 ? +n - 5 : n : n).join("");
}
export {
getHashForBuffer,
getHashForObject,
getHashForString,
lns
};
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