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Bill Allombert on Sun, 03 Dec 2023 21:53:03 +0100
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libpari precision handling changes
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- To: pari-dev@pari.math.u-bordeaux.fr
- Subject: libpari precision handling changes
- From: Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>
- Date: Sun, 3 Dec 2023 21:52:55 +0100
- Delivery-date: Sun, 03 Dec 2023 21:53:03 +0100
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Dear PARI developers,
I committed a change to the way the precision is manipulated in the
C library.
Now the precision is a multiple of BITS_IN_LONG.
DEFAULTPREC is 64 (instead of 3)
MEDDEFAULTPREC is 128 (instead of 4)
BIGDEFAULTPREC is 192 (instead of 5)
realprec return a number of bits, cgetr takes a number of bits as input, the
prototype code 'p' of 'install' passes a number of bits so every function that
takes the argument prec, will receive a number of bits etc.
While this is a major change, this should not break most C programs that used
the libpari API correctly. For example, this does not impact GP2C-generated
code.
However this might affect programs written in other languages that they cannot
use the C headers.
This does not affect GP.
Cheers,
Bill.