51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Sebastian Pancratz
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******************************************************************************/
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#include "fmpz.h"
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void fmpz_combit(fmpz_t f, ulong i)
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{
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if (!COEFF_IS_MPZ(*f))
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{
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if (i < FLINT_BITS - 2)
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{
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*f ^= (WORD(1) << i);
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}
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else /* i >= FLINT_BITS */
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{
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__mpz_struct *ptr = _fmpz_promote_val(f);
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mpz_combit(ptr, i);
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_fmpz_demote_val(f);
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}
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}
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else
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{
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__mpz_struct *ptr = COEFF_TO_PTR(*f);
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mpz_combit(ptr, i);
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_fmpz_demote_val(f);
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}
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}
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