1 /* mpz_mmod -- Mathematical MODulo, i.e. with the remainder
4 Copyright (C) 1991, 1992 Free Software Foundation, Inc.
6 This file is part of the GNU MP Library.
8 The GNU MP Library is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 The GNU MP Library is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with the GNU MP Library; see the file COPYING. If not, write to
20 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
27 mpz_mmod (MP_INT *rem,
28 const MP_INT *dividend, const MP_INT *divisor)
30 mpz_mmod (rem, dividend, divisor)
32 const MP_INT *dividend;
33 const MP_INT *divisor;
36 if ((dividend->size ^ divisor->size) >= 0)
38 /* When the dividend and the divisor has same sign, this function
39 gives same result as mpz_mod. */
40 mpz_mod (rem, dividend, divisor);
44 MP_INT temp_divisor; /* N.B.: lives until function returns! */
46 /* We need the original value of the divisor after the remainder has
47 been preliminary calculated. We have to copy it to temporary
48 space if it's the same variable as REM. */
51 MPZ_TMP_INIT (&temp_divisor, ABS (divisor->size));
52 mpz_set (&temp_divisor, divisor);
53 divisor = &temp_divisor;
56 mpz_mod (rem, dividend, divisor);
58 mpz_add (rem, rem, divisor);