ZENOTME commented on code in PR #84:
URL: https://github.com/apache/datasketches-rust/pull/84#discussion_r2778811362
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datasketches/src/hash/mod.rs:
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@@ -37,6 +37,19 @@ pub(crate) use self::xxhash::XxHash64;
/// a history of stored sketches you are stuck with it.
pub(crate) const DEFAULT_UPDATE_SEED: u64 = 9001;
+/// Computes and checks the 16-bit seed hash from the given long seed.
+///
+/// The seed hash may not be zero in order to maintain compatibility with
older serialized
+/// versions that did not have this concept.
Review Comment:
So do we need to return an error here for the result is 0 as Java:
```
public static short computeSeedHash(final long seed) {
final long[] seedArr = {seed};
final short seedHash = (short)(hash(seedArr, 0L)[0] & 0xFFFFL);
if (seedHash == 0) {
throw new SketchesArgumentException(
"The given seed: " + seed + " produced a seedHash of zero. "
+ "You must choose a different seed.");
}
return seedHash;
}
```
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