Annotation of OpenXM_contrib/gmp/mpz/lcm.c, Revision 1.1.1.1
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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