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f133d007f9
Old version was from 2012-05-06, 6.1.2 is from 2016-12-16 A lot of support for newer processors and speedups since then See gmp/NEWS for details
62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* mpz_init2 -- initialize mpz, with requested size in bits.
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Copyright 2001, 2002, 2008 Free Software Foundation, 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 either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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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 General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include <stdlib.h>
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#include <stdio.h>
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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_init2 (mpz_ptr x, mp_bitcnt_t bits)
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{
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mp_size_t new_alloc;
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bits -= (bits != 0); /* Round down, except if 0 */
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new_alloc = 1 + bits / GMP_NUMB_BITS;
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if (sizeof (unsigned long) > sizeof (int)) /* param vs _mp_size field */
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{
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if (UNLIKELY (new_alloc > INT_MAX))
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{
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fprintf (stderr, "gmp: overflow in mpz type\n");
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abort ();
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}
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}
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PTR(x) = __GMP_ALLOCATE_FUNC_LIMBS (new_alloc);
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ALLOC(x) = new_alloc;
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SIZ(x) = 0;
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#ifdef __CHECKER__
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/* let the low limb look initialized, for the benefit of mpz_get_ui etc */
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PTR(x)[0] = 0;
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#endif
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}
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