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https://issues.apache.org/jira/browse/ARROW-13810?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eduardo Ponce reassigned ARROW-13810:
-------------------------------------
Assignee: Eduardo Ponce
> [C++][Compute] Predicate IsAsciiCharacter allows invalid types and values
> -------------------------------------------------------------------------
>
> Key: ARROW-13810
> URL: https://issues.apache.org/jira/browse/ARROW-13810
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Eduardo Ponce
> Assignee: Eduardo Ponce
> Priority: Minor
> Fix For: 6.0.0
>
>
> The *IsAsciiCharacter* predicate has a template type for its input parameter
> but it only checks if the value is less than 128. This check is unbounded in
> its lower bound, so it is prone to receive non-ASCII characters (negative
> value) and return true. There are three solutions in order of my preference:
> # Remove the template and make the type uint8_t. All its use cases use
> uint8_t and this is the type used across the ASCII operations. Also, the
> other string-related utility functions are not templates.
> # Constrain the template so that it only accepts unsigned integers.
> # Add a check to validate that argument is non-negative. This check adds
> unnecessary overhead.
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