1 /* mpz_cdiv_qr -- Division rounding the quotient towards +infinity. The 2 remainder gets the opposite sign as the denominator. 3 4 Copyright 1994, 1995, 1996, 2000, 2001, 2005, 2012 Free Software Foundation, 5 Inc. 6 7 This file is part of the GNU MP Library. 8 9 The GNU MP Library is free software; you can redistribute it and/or modify 10 it under the terms of the GNU Lesser General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or (at your 12 option) any later version. 13 14 The GNU MP Library is distributed in the hope that it will be useful, but 15 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17 License for more details. 18 19 You should have received a copy of the GNU Lesser General Public License 20 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 21 22 #include "gmp.h" 23 #include "gmp-impl.h" 24 25 void 26 mpz_cdiv_qr (mpz_ptr quot, mpz_ptr rem, mpz_srcptr dividend, mpz_srcptr divisor) 27 { 28 mp_size_t divisor_size = SIZ (divisor); 29 mp_size_t xsize; 30 mpz_t temp_divisor; /* N.B.: lives until function returns! */ 31 TMP_DECL; 32 33 TMP_MARK; 34 35 /* We need the original value of the divisor after the quotient and 36 remainder have been preliminary calculated. We have to copy it to 37 temporary space if it's the same variable as either QUOT or REM. */ 38 if (quot == divisor || rem == divisor) 39 { 40 MPZ_TMP_INIT (temp_divisor, ABS (divisor_size)); 41 mpz_set (temp_divisor, divisor); 42 divisor = temp_divisor; 43 } 44 45 xsize = SIZ (dividend) ^ divisor_size;; 46 mpz_tdiv_qr (quot, rem, dividend, divisor); 47 48 if (xsize >= 0 && SIZ (rem) != 0) 49 { 50 mpz_add_ui (quot, quot, 1L); 51 mpz_sub (rem, rem, divisor); 52 } 53 54 TMP_FREE; 55 } 56