Why not just go for 32 bit lengths and stop worrying about it. 16 bit
lengths made a lot of sense on pdp-11s, but those days are long gone.
On Wednesday, July 15, 2015, Adriano dos Santos Fernandes <
adrian...@gmail.com> wrote:
> Hi!
>
> Looking again, Ivan Přenosil may be right and string literals up to 64K
> byte-length *may* be safe, as descriptors uses USHORT and internal
> calculations ULONG.
>
> At the same time, columns, parameters and everything else should be
> constrained to 32K.
>
> Currently, intermediate strings (say, a concatenation) is also
> constrained to 32K and may be extended to 64K.
>
> As Ivan uses, this may be useful for directly conversion to blobs.
>
> It may be weird that a string created (64K) may not be passed to all
> places (limited by 32K), but...
>
> There is another related thing.
>
> We're currently (trunk) limiting strings literals to 32K in bytes. But
> for multibyte (say, UTF-8), lengths should be calculated taking into
> account the number of characters. Lengths should be numberOfChars *
> maxBytesPerChar.
>
> So, long (up to 32K bytes, or even less) UTF-8 strings is not safe.
>
> So at the same time we increase literals to 64K in bytes, I think we
> should limit UTF-8 strings to 16K in characters. With a 32K byte-limit,
> max char-length of UTF-8 would be only 8K.
>
>
> Adriano
>
>
>
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--
Jim Starkey
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