Use of Floats is not supported in CosmWasm

[sashaduke]

The use of a Float32 type in src/utils/indices.rs results in the crate not compiling on CosmWasm's WASM VM.
A fix has been proposed on this pull request.

[matthiasgoergens]

To be more precise WebAssembly supports floats just fine by itself, but Sasha has an application that only supports a subset of WASM that doesn't include floating point operations.

[matthiasgoergens]

Also addressed in #16

[antouhou]

I've added a comment to #16. Although this does remove the use of the float, this makes this incompatible with the no-std. I'll try to come up with a way to do this without using floats and std. Being able to use this in the CosmWasm definitely an important feature. Thank you for the report!

[matthiasgoergens]

Thanks for having a look.

You can always use a loop to count how many right shifts you need until the number turns to 0?

There was another PR with the same aim as mine that did something like this.

[sashaduke]

no_std compatibility can be maintained by using core::mem::sizeof instead of std::mem::sizeof

[antouhou]

Hi @matthiasgoergens @sashaduke! I've merged your PRs and added one additional check for no-std targets. The changes are included in v1.3.0. Thank you! Please close this issue if that works for you, or I'll close it myself in some time :)

Thank you!

[matthiasgoergens]

Awesome, thanks!