nirandaperera commented on a change in pull request #10317:
URL: https://github.com/apache/arrow/pull/10317#discussion_r632632940
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File path: cpp/src/arrow/compute/kernels/scalar_string.cc
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@@ -266,6 +266,52 @@ void EnsureLookupTablesFilled() {}
#endif // ARROW_WITH_UTF8PROC
+template <typename Type>
+struct AsciiReverse : StringTransform<Type, AsciiReverse<Type>> {
+ using Base = StringTransform<Type, AsciiReverse<Type>>;
+ using offset_type = typename Base::offset_type;
+
+ bool Transform(const uint8_t* input, offset_type input_string_ncodeunits,
+ uint8_t* output, offset_type* output_written) {
+ uint8_t utf8_char_found = 0;
Review comment:
I used a `uint8_t` because `input[i] & 0x80` generates a `0x80`. Should
I add something like
`utf8_char_found |= (input[i] & 0x80 != 0);`?
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