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.
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* mpfr_get_q -- get a multiple-precision rational from
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a floating-point number
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Copyright 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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#ifndef MPFR_USE_MINI_GMP
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/* part of the code was copied from get_z.c */
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void
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mpfr_get_q (mpq_ptr q, mpfr_srcptr f)
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{
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mpfr_exp_t exp;
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mpz_ptr u = mpq_numref (q);
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mpz_ptr v = mpq_denref (q);
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/* v is set to 1 and will not be changed directly.
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This ensures that q will be canonical. */
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mpz_set_ui (v, 1);
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if (MPFR_UNLIKELY (MPFR_IS_SINGULAR (f)))
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{
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if (MPFR_UNLIKELY (MPFR_NOTZERO (f)))
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MPFR_SET_ERANGEFLAG ();
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mpz_set_ui (u, 0);
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/* The ternary value is 0 even for infinity. Giving the rounding
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direction in this case would not make much sense anyway, and
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the direction would not necessarily match rnd. */
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}
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else
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{
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exp = mpfr_get_z_2exp (u, f);
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if (exp >= 0)
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{
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MPFR_ASSERTN (exp <= (mp_bitcnt_t) -1);
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mpz_mul_2exp (u, u, exp);
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}
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else /* exp < 0 */
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{
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MPFR_ASSERTN (-exp <= (mp_bitcnt_t) -1);
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mpq_div_2exp (q, q, -exp);
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}
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}
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}
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#endif
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