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- var rng = require('./lib/rng');
- var bytesToUuid = require('./lib/bytesToUuid');
- var _nodeId;
- var _clockseq;
- var _lastMSecs = 0;
- var _lastNSecs = 0;
- function v1(options, buf, offset) {
- var i = buf && offset || 0;
- var b = buf || [];
- options = options || {};
- var node = options.node || _nodeId;
- var clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq;
-
-
-
- if (node == null || clockseq == null) {
- var seedBytes = rng();
- if (node == null) {
-
- node = _nodeId = [
- seedBytes[0] | 0x01,
- seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]
- ];
- }
- if (clockseq == null) {
-
- clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
- }
- }
-
-
-
-
- var msecs = options.msecs !== undefined ? options.msecs : new Date().getTime();
-
-
- var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
-
- var dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs)/10000;
-
- if (dt < 0 && options.clockseq === undefined) {
- clockseq = clockseq + 1 & 0x3fff;
- }
-
-
- if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
- nsecs = 0;
- }
-
- if (nsecs >= 10000) {
- throw new Error('uuid.v1(): Can\'t create more than 10M uuids/sec');
- }
- _lastMSecs = msecs;
- _lastNSecs = nsecs;
- _clockseq = clockseq;
-
- msecs += 12219292800000;
-
- var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
- b[i++] = tl >>> 24 & 0xff;
- b[i++] = tl >>> 16 & 0xff;
- b[i++] = tl >>> 8 & 0xff;
- b[i++] = tl & 0xff;
-
- var tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
- b[i++] = tmh >>> 8 & 0xff;
- b[i++] = tmh & 0xff;
-
- b[i++] = tmh >>> 24 & 0xf | 0x10;
- b[i++] = tmh >>> 16 & 0xff;
-
- b[i++] = clockseq >>> 8 | 0x80;
-
- b[i++] = clockseq & 0xff;
-
- for (var n = 0; n < 6; ++n) {
- b[i + n] = node[n];
- }
- return buf ? buf : bytesToUuid(b);
- }
- module.exports = v1;
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