diff options
author | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:36:36 +0200 |
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committer | Thomas Voss <mail@thomasvoss.com> | 2024-06-21 23:42:26 +0200 |
commit | a89a14ef5da44684a16b204e7a70460cc8c4922a (patch) | |
tree | b23b4c6b155977909ef508fdae2f48d33d802813 /vendor/gmp-6.3.0/mpz/init2.c | |
parent | 1db63fcedab0b288820d66e100b1877b1a5a8851 (diff) |
Basic constant folding implementation
Diffstat (limited to 'vendor/gmp-6.3.0/mpz/init2.c')
-rw-r--r-- | vendor/gmp-6.3.0/mpz/init2.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/vendor/gmp-6.3.0/mpz/init2.c b/vendor/gmp-6.3.0/mpz/init2.c new file mode 100644 index 0000000..cdb46bf --- /dev/null +++ b/vendor/gmp-6.3.0/mpz/init2.c @@ -0,0 +1,50 @@ +/* mpz_init2 -- initialize mpz, with requested size in bits. + +Copyright 2001, 2002, 2008, 2021, 2022 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 either: + + * 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. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include "gmp-impl.h" + +void +mpz_init2 (mpz_ptr x, mp_bitcnt_t bits) +{ + mp_size_t new_alloc; + + bits -= (bits != 0); /* Round down, except if 0 */ + new_alloc = 1 + bits / GMP_NUMB_BITS; + + if (sizeof (unsigned long) > sizeof (int)) /* param vs _mp_size field */ + { + if (UNLIKELY (new_alloc > INT_MAX)) + MPZ_OVERFLOW; + } + + PTR(x) = __GMP_ALLOCATE_FUNC_LIMBS (new_alloc); + ALLOC(x) = new_alloc; + SIZ(x) = 0; +} |