[css-values-5] How should random() handle extremely large ranges / extremely tiny steps?

[weinig]

The definition of the CSS random() function (https://drafts.csswg.org/css-values-5/#randomness) could use clarification on the expected math for computing a uniform distribution for ranges where for finite (but very large) max - min overflows and equals infinity. A naive implementation (or one that is using say, the C++ standard library's std::uniform_real_distribution) returns infinity for all cases here, but additional work could make this work if that is desired.

A similar problem arises for sufficiently tiny step values.

For all other math functions defined by calc, there have been clear IEEE-754 semantics to follow, or explicit algorithms (as with progress()). Given the new territory here, it would be useful to be specific in the requirements.