Proposal for Optimized Character Type Function

[enh]

On Sat, Mar 1, 2025, 15:15 Florian Weimer <fw@deneb.enyo.de> wrote:

> * The Cuthour:
>
> > I am writing to propose an enhancement to the character type functions
> > such as isalpha(), isupper(), and islower() through the use of optimized
> > lookup tables. By using a single lookup table with bitwise operations,
> > we can achieve efficient and concise implementations for these
> > functions. Below is a brief overview of the proposed implementation:
>
> Isn't this basically what the current implementation does, via
> __ctype_b_loc?  Per-thread state is required to support uselocale.
>

yeah, Android's ctype.h is ascii-only, so we can just inline an instruction
or two. (whereas wctype.h goes to icu.)

>
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