Add a mechanism for generating random LogicValues

[mkorbel1]

Motivation

LogicValue is a useful type since it supports arbitrary width in an efficient representation. For testing purposes, it might be desirable to generate a random value on a bus of arbitrary width. The built-in Dart randomization only randomizes up to 2^32, which means users have to invent their own little code snippets to generate random numbers bigger than 32 bits.

Desired solution

A way to generate large random numbers, especially for LogicValue.

One nice option might be to add an extension on Random.

It might be nice to support both valid values or a mix of valid and invalid values.

It might be nice to support random BigInts as well.

Alternatives considered

No response

Additional details

No response

[quekyj]

@mkorbel1 Let me work on this next.

[quekyj]

Random().nextLogicValue(10);

[quekyj]

arguments:

• width, maximum value, invalid bits (x and z) - true/false (bool)

generate 32 bits at a time, start with nextInt(). nextInt() will only generate 32 bits.