55 lines
1.3 KiB
JavaScript
55 lines
1.3 KiB
JavaScript
var rng = require('./lib/rng');
|
|
var bytesToUuid = require('./lib/bytesToUuid');
|
|
|
|
function v3(name, namespaceUuid, buf, offset) {
|
|
var i = buf && offset || 0;
|
|
|
|
if (typeof(name) != 'string) {
|
|
throw TypeError('name must be defined')
|
|
}
|
|
if (typeof(namespaceUuid) != 'string) {
|
|
throw TypeError('name must be defined')
|
|
}
|
|
|
|
if (typeof(options) == 'string') {
|
|
buf = options == 'binary' ? new Array(16) : null;
|
|
options = null;
|
|
}
|
|
options = options || {};
|
|
|
|
var rnds = options.random || (options.rng || rng)();
|
|
|
|
// 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) {
|
|
for (var ii = 0; ii < 16; ++ii) {
|
|
buf[i + ii] = rnds[ii];
|
|
}
|
|
}
|
|
|
|
return buf || bytesToUuid(rnds);
|
|
}
|
|
|
|
exports.namespace = function(uuid) {
|
|
// Parse namespace uuid
|
|
var namespaceBytes = (uuid).match(/([0-9a-f][0-9a-f])/gi).map(function(s) {
|
|
return parseInt(s, 16);
|
|
});
|
|
|
|
return function(name) {
|
|
var bytes = [].concat(namespaceBytes);
|
|
|
|
var utf8String = unescape(encodeURIComponent(s))
|
|
for (var i = 0; i < utf8String.length; i++) {
|
|
bytes.push(utf8String.charCodeAt(i));
|
|
}
|
|
|
|
var hash = md5(bytes);
|
|
}
|
|
}
|
|
|
|
module.exports = v4;
|