MRG: standardize on u32 for scaled, and introduce ScaledType

src/core/src/ffi/cmd/compute.rs

@@ -1,6 +1,7 @@
 use std::slice;
 
 use crate::cmd::ComputeParameters;
+use crate::ScaledType;
 
 use crate::ffi::utils::ForeignObject;
 
@@ -155,7 +156,7 @@ pub unsafe extern "C" fn computeparams_set_num_hashes(
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn computeparams_scaled(ptr: *const SourmashComputeParameters) -> u32 {
+pub unsafe extern "C" fn computeparams_scaled(ptr: *const SourmashComputeParameters) -> ScaledType {
     let cp = SourmashComputeParameters::as_rust(ptr);
     cp.scaled()
 }

src/core/src/ffi/index/revindex.rs

@@ -12,6 +12,7 @@
 use crate::signature::{Signature, SigsTrait};
 use crate::sketch::minhash::KmerMinHash;
 use crate::sketch::Sketch;
+use crate::ScaledType;
 
 pub struct SourmashRevIndex;
 
@@ -233,7 +234,7 @@
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn revindex_scaled(ptr: *const SourmashRevIndex) -> u32 {
+pub unsafe extern "C" fn revindex_scaled(ptr: *const SourmashRevIndex) -> ScaledType {
     let revindex = SourmashRevIndex::as_rust(ptr);
     if let Sketch::MinHash(mh) = revindex.template() {
         mh.scaled()