langsmith
Version:
Client library to connect to the LangSmith Observability and Evaluation Platform.
41 lines (40 loc) • 1.54 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const rng_js_1 = __importDefault(require("./rng.cjs"));
const stringify_js_1 = require("./stringify.cjs");
function v4(options, buf, offset) {
if (!buf && !options && crypto.randomUUID) {
return crypto.randomUUID();
}
// Putting tail-code that could just go inline here in a separate function to
// enable compiler optimizations that dramatically improve performance.
//
// REF: https://github.com/uuidjs/uuid/issues/892
return _v4(options, buf, offset);
}
function _v4(options, buf, offset) {
options = options || {};
const rnds = options.random ?? options.rng?.() ?? (0, rng_js_1.default)();
if (rnds.length < 16) {
throw new Error("Random bytes length must be >= 16");
}
// Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
rnds[6] = (rnds[6] & 0x0f) | 0x40;
rnds[8] = (rnds[8] & 0x3f) | 0x80;
// Copy bytes to buffer, if provided
if (buf) {
offset = offset || 0;
if (offset < 0 || offset + 16 > buf.length) {
throw new RangeError(`UUID byte range ${offset}:${offset + 15} is out of buffer bounds`);
}
for (let i = 0; i < 16; ++i) {
buf[offset + i] = rnds[i];
}
return buf;
}
return (0, stringify_js_1.unsafeStringify)(rnds);
}
exports.default = v4;