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- var bytesToUuid = require('./bytesToUuid');
-
- function uuidToBytes(uuid) {
- // Note: We assume we're being passed a valid uuid string
- var bytes = [];
- uuid.replace(/[a-fA-F0-9]{2}/g, function(hex) {
- bytes.push(parseInt(hex, 16));
- });
-
- return bytes;
- }
-
- function stringToBytes(str) {
- str = unescape(encodeURIComponent(str)); // UTF8 escape
- var bytes = new Array(str.length);
- for (var i = 0; i < str.length; i++) {
- bytes[i] = str.charCodeAt(i);
- }
- return bytes;
- }
-
- module.exports = function(name, version, hashfunc) {
- var generateUUID = function(value, namespace, buf, offset) {
- var off = buf && offset || 0;
-
- if (typeof(value) == 'string') value = stringToBytes(value);
- if (typeof(namespace) == 'string') namespace = uuidToBytes(namespace);
-
- if (!Array.isArray(value)) throw TypeError('value must be an array of bytes');
- if (!Array.isArray(namespace) || namespace.length !== 16) throw TypeError('namespace must be uuid string or an Array of 16 byte values');
-
- // Per 4.3
- var bytes = hashfunc(namespace.concat(value));
- bytes[6] = (bytes[6] & 0x0f) | version;
- bytes[8] = (bytes[8] & 0x3f) | 0x80;
-
- if (buf) {
- for (var idx = 0; idx < 16; ++idx) {
- buf[off+idx] = bytes[idx];
- }
- }
-
- return buf || bytesToUuid(bytes);
- };
-
- // Function#name is not settable on some platforms (#270)
- try {
- generateUUID.name = name;
- } catch (err) {
- }
-
- // Pre-defined namespaces, per Appendix C
- generateUUID.DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
- generateUUID.URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
-
- return generateUUID;
- };
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