The new versions of the patches are attached addressing your comments.
> C++ surely make just static functions inlined but I'm not sure C
> compiler does that.
Thank you for your explanation. I marked the mentioned functions "inline".
> So we should be safe to have a buffer with 26 byte length and 500
> bytes will apparently too large and even 128 will be too loose in
> most cases. So how about something like the following?
>
> #define MINDOUBLEWIDTH 32
I left this part out for now. We can improve it separately.
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