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Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/mpz/cdiv_qr_ui.c, Revision 1.1

1.1     ! takayama    1: /* mpz_cdiv_qr_ui -- Division rounding the quotient towards +infinity.  The
        !             2:    remainder gets the opposite sign as the denominator.  In order to make it
        !             3:    always fit into the return type, the negative of the true remainder is
        !             4:    returned.
        !             5:
        !             6: Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
        !             7:
        !             8: This file is part of the GNU MP Library.
        !             9:
        !            10: The GNU MP Library is free software; you can redistribute it and/or modify
        !            11: it under the terms of the GNU Library General Public License as published by
        !            12: the Free Software Foundation; either version 2 of the License, or (at your
        !            13: option) any later version.
        !            14:
        !            15: The GNU MP Library is distributed in the hope that it will be useful, but
        !            16: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            17: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            18: License for more details.
        !            19:
        !            20: You should have received a copy of the GNU Library General Public License
        !            21: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
        !            22: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            23: MA 02111-1307, USA. */
        !            24:
        !            25: #include "gmp.h"
        !            26: #include "gmp-impl.h"
        !            27:
        !            28: unsigned long int
        !            29: #if __STDC__
        !            30: mpz_cdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
        !            31: #else
        !            32: mpz_cdiv_qr_ui (quot, rem, dividend, divisor)
        !            33:      mpz_ptr quot;
        !            34:      mpz_ptr rem;
        !            35:      mpz_srcptr dividend;
        !            36:      unsigned long int divisor;
        !            37: #endif
        !            38: {
        !            39:   mp_size_t dividend_size;
        !            40:   mp_size_t size;
        !            41:   mp_ptr quot_ptr;
        !            42:   mp_limb_t remainder_limb;
        !            43:
        !            44:   dividend_size = dividend->_mp_size;
        !            45:   size = ABS (dividend_size);
        !            46:
        !            47:   if (quot->_mp_alloc < size)
        !            48:     _mpz_realloc (quot, size);
        !            49:
        !            50:   quot_ptr = quot->_mp_d;
        !            51:
        !            52:   remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size,
        !            53:                                   (mp_limb_t) divisor);
        !            54:
        !            55:   if (remainder_limb != 0 && dividend_size >= 0)
        !            56:     {
        !            57:       mpn_add_1 (quot_ptr, quot_ptr, size, (mp_limb_t) 1);
        !            58:       remainder_limb = divisor - remainder_limb;
        !            59:     }
        !            60:
        !            61:   size -= size != 0 && quot_ptr[size - 1] == 0;
        !            62:   quot->_mp_size = dividend_size >= 0 ? size : -size;
        !            63:
        !            64:   rem->_mp_d[0] = remainder_limb;
        !            65:   rem->_mp_size = -(remainder_limb != 0);
        !            66:
        !            67:   return remainder_limb;
        !            68: }