friendlymatthew commented on code in PR #7908:
URL: https://github.com/apache/arrow-rs/pull/7908#discussion_r2202057389
##########
parquet-variant/Cargo.toml:
##########
@@ -37,6 +37,7 @@ arrow-schema = { workspace = true }
chrono = { workspace = true }
indexmap = "2.10.0"
+simdutf8 = { version = "0.1.5", default-features = false }
Review Comment:
`simdutf8` is used in other crates as well. I wonder if we should move this
out to a workspace dependency?
##########
parquet-variant/src/utils.rs:
##########
@@ -84,6 +84,16 @@ pub(crate) fn string_from_slice(
.map_err(|_| ArrowError::InvalidArgumentError("invalid UTF-8
string".to_string()))
}
+/// Extracts a byte slice from the given range and validates it as UTF-8.
+pub(crate) fn extract_and_validate_utf8_slice(
+ bytes: &[u8],
+ range: Range<usize>,
+) -> Result<&str, ArrowError> {
+ let offset_buffer = slice_from_slice(bytes, range)?;
+ simdutf8::basic::from_utf8(offset_buffer)
+ .map_err(|_| ArrowError::InvalidArgumentError("invalid UTF-8
string".to_string()))
+}
+
Review Comment:
This looks great. I think @viirya pointed out that if this function errs,
the error message will contain the entire byte slice.
I wonder if we could use something like:
https://github.com/apache/arrow-rs/blob/7b219f98c25fcd318a0c207f51a41398d1b23724/parquet/src/util/utf8.rs#L40-L57
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