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set_si.c
Package: gmp-5.0.1.tar.gz [view]
Upload User: qaz666999
Upload Date: 2022-08-06
Package Size: 2570k
Code Size: 1k
Category:
Algorithm
Development Platform:
Unix_Linux
- /* mpz_set_si(dest,val) -- Assign DEST with a small value VAL.
- Copyright 1991, 1993, 1994, 1995, 2000, 2001, 2002 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
- mpz_set_si (mpz_ptr dest, signed long int val)
- {
- mp_size_t size;
- mp_limb_t vl;
- vl = (mp_limb_t) (unsigned long int) (val >= 0 ? val : -val);
- dest->_mp_d[0] = vl & GMP_NUMB_MASK;
- size = vl != 0;
- #if GMP_NAIL_BITS != 0
- if (vl > GMP_NUMB_MAX)
- {
- MPZ_REALLOC (dest, 2);
- dest->_mp_d[1] = vl >> GMP_NUMB_BITS;
- size = 2;
- }
- #endif
- dest->_mp_size = val >= 0 ? size : -size;
- }