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.
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* mpfr_integer_p -- test if a mpfr variable is integer.
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Copyright 2001-2004, 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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int
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mpfr_integer_p (mpfr_srcptr x)
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{
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mpfr_exp_t expo;
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mpfr_prec_t prec;
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mp_size_t xn;
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mp_limb_t *xp;
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if (MPFR_UNLIKELY( MPFR_IS_SINGULAR(x)))
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return (MPFR_IS_ZERO(x));
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expo = MPFR_GET_EXP (x);
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if (expo <= 0)
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return 0;
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prec = MPFR_PREC(x);
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if ((mpfr_uexp_t) expo >= (mpfr_uexp_t) prec)
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return 1;
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/* 0 < expo < prec */
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xn = (mp_size_t) ((prec - 1) / GMP_NUMB_BITS); /* index of last limb */
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xn -= (mp_size_t) (expo / GMP_NUMB_BITS);
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/* now the index of the last limb containing bits of the fractional part */
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xp = MPFR_MANT(x);
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MPFR_ASSERTN(xn >= 0);
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if (MPFR_LIMB_LSHIFT(xp[xn], expo % GMP_NUMB_BITS) != 0)
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return 0;
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while (--xn >= 0)
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if (xp[xn] != 0)
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return 0;
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return 1;
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}
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