1/* mpz_fdiv_r -- Division rounding the quotient towards -infinity. 2 The remainder gets the same sign as the denominator. 3 4Copyright 1994-1996, 2001, 2005, 2012 Free Software Foundation, Inc. 5 6This file is part of the GNU MP Library. 7 8The GNU MP Library is free software; you can redistribute it and/or modify 9it under the terms of either: 10 11 * the GNU Lesser General Public License as published by the Free 12 Software Foundation; either version 3 of the License, or (at your 13 option) any later version. 14 15or 16 17 * the GNU General Public License as published by the Free Software 18 Foundation; either version 2 of the License, or (at your option) any 19 later version. 20 21or both in parallel, as here. 22 23The GNU MP Library is distributed in the hope that it will be useful, but 24WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 25or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 26for more details. 27 28You should have received copies of the GNU General Public License and the 29GNU Lesser General Public License along with the GNU MP Library. If not, 30see https://www.gnu.org/licenses/. */ 31 32#include "gmp-impl.h" 33 34void 35mpz_fdiv_r (mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor) 36{ 37 mp_size_t divisor_size = SIZ (divisor); 38 mpz_t temp_divisor; /* N.B.: lives until function returns! */ 39 TMP_DECL; 40 41 TMP_MARK; 42 43 /* We need the original value of the divisor after the remainder has been 44 preliminary calculated. We have to copy it to temporary space if it's 45 the same variable as REM. */ 46 if (rem == divisor) 47 { 48 MPZ_TMP_INIT (temp_divisor, ABS (divisor_size)); 49 mpz_set (temp_divisor, divisor); 50 divisor = temp_divisor; 51 } 52 53 mpz_tdiv_r (rem, dividend, divisor); 54 55 if ((divisor_size ^ SIZ (dividend)) < 0 && SIZ (rem) != 0) 56 mpz_add (rem, rem, divisor); 57 58 TMP_FREE; 59} 60