![]() Just generate a GUID/UUID, and increase the integer. The only way to do that without weakening the GUID/UUID randomness would be to prefix the 16-byte GUID/UUID with an unsigned integer (which would make your identifier data 20-bytes, or more, depending on your integer). Now, you want the GUID/UUID to be ordered in time. There is a GUID/UUID type which is always random (the version 4), meaning that to be compatible with other GUID/UUID semantics, you should respect that. The Wikipedia page on GUID/UUID has a list of alternative implementations you could use/study: CryptGenRandom to generate enough bytes to make up a GUID/UUID.CryptReleaseContext to release the acquired random context uuid-generator Open-source projects categorized as uuid-generator Edit details Language: + Go + Python + TypeScript + Java + HTML + Emacs Lisp + JavaScript + Rust Topics: Uuid Id Guid Uuid1 Identifier Clean code begins in your IDE with SonarLint Up your coding game and discover issues early.CryptAcquireContext to acquire a random context Open a file to /dev/urandom and read enough bytes (16) to make up a GUID/UUID.Open a file to /dev/urandom and read enough bytes (16) to make up a GUID/UUID. Now, you want the GUID/UUID to be ordered in time. Last time I checked (january 2010), I found at least the following implementations for Windows and Linux/Solaris (this info could be outdated): UUID/GUID on Linux/Solaris It is a C++ library, but still, you can find inside how the code author retrieved the Uuid on multiple systems. You can either use or look at the code of Boost.Uuid : srand (clock()) Ĭhar *szTemp = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx" Ĭase 'y' : break This is something cobbled together to help give a clean example for others to follow. I'm sure there are more elegant solutions out there. ![]() this example uses RegEx to create the GUID.īelow is code that will create a GUID based on the JavaSCript example. However, to address the need for a C based GUID function, here is code based on a JavaScript function. In their examples, they discuss how to add server names, database names, and other elements to a GUID. One place to look for an answer to creating a GUID that contains many of the elements the author is looking for is in PHP.
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