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author | tege <tege@gmplib.org> | 1996-10-18 10:47:25 +0200 |
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committer | tege <tege@gmplib.org> | 1996-10-18 10:47:25 +0200 |
commit | c3d4e596048c8f43d0d5bfcaad3d88b4d3cbe8b4 (patch) | |
tree | 40a24bf942a84a35472adba59b125a3d5e29ee1d /mpz/lcm.c | |
parent | e83917533027ee4c95c136ee329b75aace39cf4f (diff) | |
download | gmp-c3d4e596048c8f43d0d5bfcaad3d88b4d3cbe8b4.tar.gz |
New file.
Diffstat (limited to 'mpz/lcm.c')
-rw-r--r-- | mpz/lcm.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/mpz/lcm.c b/mpz/lcm.c new file mode 100644 index 000000000..22f3a83de --- /dev/null +++ b/mpz/lcm.c @@ -0,0 +1,56 @@ +/* mpz/lcm.c: Calculate the least common multiple of two integers. + +Copyright (C) 1996 Free Software Foundation, Inc. + +This file is part of the GNU MP Library. + +The GNU MP Library is free software; you can redistribute it and/or modify +it under the terms of the GNU Library General Public License as published by +the Free Software Foundation; either version 2 of the License, or (at your +option) any later version. + +The GNU MP Library is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public +License for more details. + +You should have received a copy of the GNU Library General Public License +along with the GNU MP Library; see the file COPYING.LIB. If not, write to +the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, +MA 02111-1307, USA. */ + +#include "gmp.h" +#include "gmp-impl.h" +#include "longlong.h" + +void *_mpz_realloc (); + +void +#if __STDC__ +mpz_lcm (mpz_ptr r, mpz_srcptr u, mpz_srcptr v) +#else +mpz_lcm (r, u, v) + mpz_ptr r; + mpz_srcptr u; + mpz_srcptr v; +#endif +{ + mpz_t g; + mp_size_t usize, vsize, size; + + usize = ABS (SIZ (u)); + vsize = ABS (SIZ (v)); + + if (usize == 0 || vsize == 0) + { + SIZ (r) = 0; + return; + } + + size = MAX (usize, vsize); + MPZ_TMP_INIT (g, size); + + mpz_gcd (g, u, v); + mpz_divexact (g, u, g); + mpz_mul (r, g, v); +} |