set_z.c
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上传日期:2022-08-06
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- /* mpf_set_z -- Assign a float from an integer.
- Copyright 1996, 2001, 2004 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include "gmp.h"
- #include "gmp-impl.h"
- void
- mpf_set_z (mpf_ptr r, mpz_srcptr u)
- {
- mp_ptr rp, up;
- mp_size_t size, asize;
- mp_size_t prec;
- prec = PREC (r) + 1;
- size = SIZ (u);
- asize = ABS (size);
- rp = PTR (r);
- up = PTR (u);
- EXP (r) = asize;
- if (asize > prec)
- {
- up += asize - prec;
- asize = prec;
- }
- SIZ (r) = size >= 0 ? asize : -asize;
- MPN_COPY (rp, up, asize);
- }