aboutsummaryrefslogtreecommitdiff
path: root/includes/js/dojox/uuid/generateRandomUuid.js
diff options
context:
space:
mode:
Diffstat (limited to 'includes/js/dojox/uuid/generateRandomUuid.js')
-rw-r--r--includes/js/dojox/uuid/generateRandomUuid.js56
1 files changed, 56 insertions, 0 deletions
diff --git a/includes/js/dojox/uuid/generateRandomUuid.js b/includes/js/dojox/uuid/generateRandomUuid.js
new file mode 100644
index 0000000..ec590e9
--- /dev/null
+++ b/includes/js/dojox/uuid/generateRandomUuid.js
@@ -0,0 +1,56 @@
+if(!dojo._hasResource["dojox.uuid.generateRandomUuid"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.uuid.generateRandomUuid"] = true;
+dojo.provide("dojox.uuid.generateRandomUuid");
+
+dojox.uuid.generateRandomUuid = function(){
+ // summary:
+ // This function generates random UUIDs, meaning "version 4" UUIDs.
+ // description:
+ // A typical generated value would be something like this:
+ // "3b12f1df-5232-4804-897e-917bf397618a"
+ //
+ // For more information about random UUIDs, see sections 4.4 and
+ // 4.5 of RFC 4122: http://tools.ietf.org/html/rfc4122#section-4.4
+ //
+ // This generator function is designed to be small and fast,
+ // but not necessarily good.
+ //
+ // Small: This generator has a small footprint. Once comments are
+ // stripped, it's only about 25 lines of code, and it doesn't
+ // dojo.require() any other modules.
+ //
+ // Fast: This generator can generate lots of new UUIDs fairly quickly
+ // (at least, more quickly than the other dojo UUID generators).
+ //
+ // Not necessarily good: We use Math.random() as our source
+ // of randomness, which may or may not provide much randomness.
+ // examples:
+ // var string = dojox.uuid.generateRandomUuid();
+ var HEX_RADIX = 16;
+
+ function _generateRandomEightCharacterHexString(){
+ // Make random32bitNumber be a randomly generated floating point number
+ // between 0 and (4,294,967,296 - 1), inclusive.
+ var random32bitNumber = Math.floor( (Math.random() % 1) * Math.pow(2, 32) );
+ var eightCharacterHexString = random32bitNumber.toString(HEX_RADIX);
+ while(eightCharacterHexString.length < 8){
+ eightCharacterHexString = "0" + eightCharacterHexString;
+ }
+ return eightCharacterHexString; // for example: "3B12F1DF"
+ }
+
+ var hyphen = "-";
+ var versionCodeForRandomlyGeneratedUuids = "4"; // 8 == binary2hex("0100")
+ var variantCodeForDCEUuids = "8"; // 8 == binary2hex("1000")
+ var a = _generateRandomEightCharacterHexString();
+ var b = _generateRandomEightCharacterHexString();
+ b = b.substring(0, 4) + hyphen + versionCodeForRandomlyGeneratedUuids + b.substring(5, 8);
+ var c = _generateRandomEightCharacterHexString();
+ c = variantCodeForDCEUuids + c.substring(1, 4) + hyphen + c.substring(4, 8);
+ var d = _generateRandomEightCharacterHexString();
+ var returnValue = a + hyphen + b + hyphen + c + d;
+ returnValue = returnValue.toLowerCase();
+ return returnValue; // String
+};
+
+}