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Diffstat (limited to 'mpi/mpi-gcd.c')
| -rw-r--r-- | mpi/mpi-gcd.c | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/mpi/mpi-gcd.c b/mpi/mpi-gcd.c deleted file mode 100644 index 226faf15..00000000 --- a/mpi/mpi-gcd.c +++ /dev/null @@ -1,54 +0,0 @@ -/* mpi-gcd.c - MPI functions - * Copyright (C) 1998 Free Software Foundation, Inc. - * - * This file is part of GnuPG. - * - * GnuPG is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * GnuPG 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#include <config.h> -#include <stdio.h> -#include <stdlib.h> -#include "mpi-internal.h" - -/**************** - * Find the greatest common divisor G of A and B. - * Return: true if this 1, false in all other cases - */ -int -mpi_gcd( MPI g, MPI xa, MPI xb ) -{ - MPI a, b; - - a = mpi_copy(xa); - b = mpi_copy(xb); - - /* TAOCP Vol II, 4.5.2, Algorithm A */ - a->sign = 0; - b->sign = 0; - while( mpi_cmp_ui( b, 0 ) ) { - mpi_fdiv_r( g, a, b ); /* g used as temorary variable */ - mpi_set(a,b); - mpi_set(b,g); - } - mpi_set(g, a); - - mpi_free(a); - mpi_free(b); - return !mpi_cmp_ui( g, 1); -} - - - |