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c++guiduuid

How to convert a UUID that saved in an array of bytes into a string (c++)

I have a UUID that saved as a 16 byte data like this:

   unsigned char uuid[16]; //128-bits unique identifier

and I want to convert it to a std::string. I can probably write a loop to go thought all bytes and generate the string, but I am looking for a simpler/faster solution. Is there any such solution?

Solution

  • If you really want to avoid a loop, you can always do something like:

    char str[37] = {};
sprintf(str, 
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x", 
    uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7],
    uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]
);

    Not really elegant, but i think it's the best you can get without loop and without platform dependency.