Annotation of OpenXM_contrib/gmp/mpz/lcm.c, Revision 1.1
1.1 ! maekawa 1: /* mpz/lcm.c: Calculate the least common multiple of two integers.
! 2:
! 3: Copyright (C) 1996 Free Software Foundation, Inc.
! 4:
! 5: This file is part of the GNU MP Library.
! 6:
! 7: The GNU MP Library is free software; you can redistribute it and/or modify
! 8: it under the terms of the GNU Lesser General Public License as published by
! 9: the Free Software Foundation; either version 2.1 of the License, or (at your
! 10: option) any later version.
! 11:
! 12: The GNU MP Library is distributed in the hope that it will be useful, but
! 13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! 15: License for more details.
! 16:
! 17: You should have received a copy of the GNU Lesser General Public License
! 18: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
! 19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! 20: MA 02111-1307, USA. */
! 21:
! 22: #include "gmp.h"
! 23: #include "gmp-impl.h"
! 24: #include "longlong.h"
! 25:
! 26: void *_mpz_realloc ();
! 27:
! 28: void
! 29: #if __STDC__
! 30: mpz_lcm (mpz_ptr r, mpz_srcptr u, mpz_srcptr v)
! 31: #else
! 32: mpz_lcm (r, u, v)
! 33: mpz_ptr r;
! 34: mpz_srcptr u;
! 35: mpz_srcptr v;
! 36: #endif
! 37: {
! 38: mpz_t g;
! 39: mp_size_t usize, vsize, size;
! 40:
! 41: usize = ABS (SIZ (u));
! 42: vsize = ABS (SIZ (v));
! 43:
! 44: if (usize == 0 || vsize == 0)
! 45: {
! 46: SIZ (r) = 0;
! 47: return;
! 48: }
! 49:
! 50: size = MAX (usize, vsize);
! 51: MPZ_TMP_INIT (g, size);
! 52:
! 53: mpz_gcd (g, u, v);
! 54: mpz_divexact (g, u, g);
! 55: mpz_mul (r, g, v);
! 56: }
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