52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* mpz_init_set_si(dest,val) -- Make a new multiple precision in DEST and
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assign VAL to the new number.
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Copyright 1991, 1993, 1994, 1995, 2000, 2001, 2002 Free Software Foundation,
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Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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mpz_init_set_si (mpz_ptr dest, signed long int val)
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{
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mp_size_t size;
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mp_limb_t vl;
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dest->_mp_alloc = 1;
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dest->_mp_d = (mp_ptr) (*__gmp_allocate_func) (BYTES_PER_MP_LIMB);
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vl = (mp_limb_t) (unsigned long int) (val >= 0 ? val : -val);
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dest->_mp_d[0] = vl & GMP_NUMB_MASK;
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size = vl != 0;
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#if GMP_NAIL_BITS != 0
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if (vl > GMP_NUMB_MAX)
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{
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MPZ_REALLOC (dest, 2);
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dest->_mp_d[1] = vl >> GMP_NUMB_BITS;
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size = 2;
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}
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#endif
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dest->_mp_size = val >= 0 ? size : -size;
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}
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