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git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@29041 a95241bf-73f2-0310-859d-f6bbb57e9c96
57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* mpz_fdiv_qr -- Division rounding the quotient towards -infinity.
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The remainder gets the same sign as the denominator.
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Copyright 1994, 1995, 1996, 2000, 2001, 2005 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 the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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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 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 MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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mpz_fdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor)
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{
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mp_size_t divisor_size = divisor->_mp_size;
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mp_size_t xsize;
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mpz_t temp_divisor; /* N.B.: lives until function returns! */
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TMP_DECL;
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TMP_MARK;
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/* We need the original value of the divisor after the quotient and
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remainder have been preliminary calculated. We have to copy it to
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temporary space if it's the same variable as either QUOT or REM. */
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if (quot == divisor || rem == divisor)
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{
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MPZ_TMP_INIT (temp_divisor, ABS (divisor_size));
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mpz_set (temp_divisor, divisor);
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divisor = temp_divisor;
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}
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xsize = dividend->_mp_size ^ divisor_size;;
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mpz_tdiv_qr (quot, rem, dividend, divisor);
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if (xsize < 0 && rem->_mp_size != 0)
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{
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mpz_sub_ui (quot, quot, 1L);
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mpz_add (rem, rem, divisor);
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}
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TMP_FREE;
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}
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