vasilito
facf0c92e0
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.
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* mpf_get_si -- mpf to long conversion
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Copyright 2001, 2002, 2004 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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The GNU MP 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 General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include "gmp-impl.h"
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/* Any fraction bits are truncated, meaning simply discarded.
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For values bigger than a long, the low bits are returned, like
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mpz_get_si, but this isn't documented.
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Notice this is equivalent to mpz_set_f + mpz_get_si.
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Implementation:
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fl is established in basically the same way as for mpf_get_ui, see that
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code for explanations of the conditions.
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However unlike mpf_get_ui we need an explicit return 0 for exp<=0. When
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f is a negative fraction (ie. size<0 and exp<=0) we can't let fl==0 go
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through to the zany final "~ ((fl - 1) & LONG_MAX)", that would give
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-0x80000000 instead of the desired 0. */
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long
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mpf_get_si (mpf_srcptr f) __GMP_NOTHROW
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{
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mp_exp_t exp;
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mp_size_t size, abs_size;
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mp_srcptr fp;
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mp_limb_t fl;
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exp = EXP (f);
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size = SIZ (f);
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fp = PTR (f);
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/* fraction alone truncates to zero
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this also covers zero, since we have exp==0 for zero */
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if (exp <= 0)
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return 0L;
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/* there are some limbs above the radix point */
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fl = 0;
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abs_size = ABS (size);
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if (abs_size >= exp)
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fl = fp[abs_size-exp];
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#if BITS_PER_ULONG > GMP_NUMB_BITS
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if (exp > 1 && abs_size+1 >= exp)
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fl |= fp[abs_size - exp + 1] << GMP_NUMB_BITS;
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#endif
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if (size > 0)
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return fl & LONG_MAX;
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else
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/* this form necessary to correctly handle -0x80..00 */
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return -1 - (long) ((fl - 1) & LONG_MAX);
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}
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