fib2_ui.c
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上传日期:2022-08-06
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- /* mpz_fib2_ui -- calculate Fibonacci numbers.
- Copyright 2001 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 <stdio.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- void
- mpz_fib2_ui (mpz_ptr fn, mpz_ptr fnsub1, unsigned long n)
- {
- mp_ptr fp, f1p;
- mp_size_t size;
- size = MPN_FIB2_SIZE (n);
- MPZ_REALLOC (fn, size);
- MPZ_REALLOC (fnsub1, size);
- fp = PTR (fn);
- f1p = PTR (fnsub1);
- size = mpn_fib2_ui (fp, f1p, n);
- SIZ(fn) = size - (n == 0);
- SIZ(fnsub1) = size - (f1p[size-1] == 0);
- }