mirror of
https://github.com/vale981/arb
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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2014 Fredrik Johansson
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******************************************************************************/
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#include "double_extras.h"
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#include "mag.h"
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double
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mag_get_d(const mag_t z)
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{
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if (mag_is_zero(z))
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{
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return 0.0;
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}
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else if (mag_is_inf(z))
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{
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return D_INF;
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}
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else if (MAG_EXP(z) < -1000 || MAG_EXP(z) > 1000)
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{
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if (fmpz_sgn(MAG_EXPREF(z)) < 0)
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return ldexp(1.0, -1000);
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else
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return D_INF;
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}
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else
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{
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return ldexp(MAG_MAN(z), MAG_EXP(z) - MAG_BITS);
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}
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}
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