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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: }