aa9bc17601
BMakefiles and other bits will follow. Requested by: Andrey Chernov Made world by: Chuck Robey
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
/* mpz_fdiv_qr_ui -- Division rounding the quotient towards -infinity.
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The remainder gets the same sign as the denominator.
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Copyright (C) 1994, 1995, 1996 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 Library General Public License as published by
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the Free Software Foundation; either version 2 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 Library General Public
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License for more details.
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You should have received a copy of the GNU Library 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., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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unsigned long int
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#if __STDC__
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mpz_fdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
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#else
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mpz_fdiv_qr_ui (quot, rem, dividend, divisor)
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mpz_ptr quot;
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mpz_ptr rem;
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mpz_srcptr dividend;
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unsigned long int divisor;
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#endif
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{
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mp_size_t dividend_size;
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mp_size_t size;
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mp_ptr quot_ptr;
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mp_limb_t remainder_limb;
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dividend_size = dividend->_mp_size;
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size = ABS (dividend_size);
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if (quot->_mp_alloc < size)
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_mpz_realloc (quot, size);
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quot_ptr = quot->_mp_d;
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remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
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(mp_limb_t) divisor);
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if (remainder_limb != 0 && dividend_size < 0)
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{
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mpn_add_1 (quot_ptr, quot_ptr, size, (mp_limb_t) 1);
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remainder_limb = divisor - remainder_limb;
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}
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size -= size != 0 && quot_ptr[size - 1] == 0;
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quot->_mp_size = dividend_size >= 0 ? size : -size;
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rem->_mp_d[0] = remainder_limb;
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rem->_mp_size = remainder_limb != 0;
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return remainder_limb;
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}
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