vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/* mpfr_get_ui -- convert a floating-point number to an unsigned long.
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Copyright 2003-2004, 2006-2025 Free Software Foundation, Inc.
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Contributed by the Pascaline and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR 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 Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER.
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If not, see <https://www.gnu.org/licenses/>. */
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#include "mpfr-impl.h"
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unsigned long
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mpfr_get_ui (mpfr_srcptr f, mpfr_rnd_t rnd)
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{
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mpfr_prec_t prec;
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unsigned long s;
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mpfr_t x;
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mp_size_t n;
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mpfr_exp_t exp;
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MPFR_SAVE_EXPO_DECL (expo);
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if (MPFR_UNLIKELY (!mpfr_fits_ulong_p (f, rnd)))
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{
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MPFR_SET_ERANGEFLAG ();
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return MPFR_IS_NAN (f) || MPFR_IS_NEG (f) ?
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(unsigned long) 0 : ULONG_MAX;
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}
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if (MPFR_IS_ZERO (f))
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return (unsigned long) 0;
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for (s = ULONG_MAX, prec = 0; s != 0; s /= 2, prec ++)
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{ }
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MPFR_SAVE_EXPO_MARK (expo);
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/* first round to prec bits */
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mpfr_init2 (x, prec);
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mpfr_rint (x, f, rnd);
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/* The flags from mpfr_rint are the wanted ones. In particular,
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it sets the inexact flag when necessary. */
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MPFR_SAVE_EXPO_UPDATE_FLAGS (expo, __gmpfr_flags);
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/* warning: if x=0, taking its exponent is illegal */
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if (MPFR_NOTZERO (x))
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{
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exp = MPFR_GET_EXP (x);
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MPFR_ASSERTD (exp >= 1); /* since |x| >= 1 */
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n = MPFR_LIMB_SIZE (x);
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#ifdef MPFR_LONG_WITHIN_LIMB
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MPFR_ASSERTD (exp <= GMP_NUMB_BITS);
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#else
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while (exp > GMP_NUMB_BITS)
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{
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MPFR_ASSERTD (n > 0);
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s += (unsigned long) MPFR_MANT(x)[n - 1] << (exp - GMP_NUMB_BITS);
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n--;
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exp -= GMP_NUMB_BITS;
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}
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#endif
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MPFR_ASSERTD (n > 0);
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s += MPFR_MANT(x)[n - 1] >> (GMP_NUMB_BITS - exp);
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}
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mpfr_clear (x);
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MPFR_SAVE_EXPO_FREE (expo);
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return s;
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}
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