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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: }