/* mpz_cdiv_qr_ui -- Division rounding the quotient towards +infinity. The remainder gets the opposite sign as the denominator. In order to make it always fit into the return type, the negative of the true remainder is returned. Copyright (C) 1994, 1995, 1996, 1999 Free Software Foundation, Inc. This file is part of the GNU MP Library. The GNU MP Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. The GNU MP Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU MP Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "gmp.h" #include "gmp-impl.h" unsigned long int #if __STDC__ mpz_cdiv_qr_ui (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor) #else mpz_cdiv_qr_ui (quot, rem, dividend, divisor) mpz_ptr quot; mpz_ptr rem; mpz_srcptr dividend; unsigned long int divisor; #endif { mp_size_t dividend_size; mp_size_t size; mp_ptr quot_ptr; mp_limb_t remainder_limb; if (divisor == 0) DIVIDE_BY_ZERO; dividend_size = dividend->_mp_size; size = ABS (dividend_size); if (quot->_mp_alloc < size) _mpz_realloc (quot, size); quot_ptr = quot->_mp_d; remainder_limb = mpn_divmod_1 (quot_ptr, dividend->_mp_d, size, (mp_limb_t) divisor); if (remainder_limb != 0 && dividend_size >= 0) { mpn_incr_u (quot_ptr, (mp_limb_t) 1); remainder_limb = divisor - remainder_limb; } size -= size != 0 && quot_ptr[size - 1] == 0; quot->_mp_size = dividend_size >= 0 ? size : -size; rem->_mp_d[0] = remainder_limb; rem->_mp_size = -(remainder_limb != 0); return remainder_limb; }