Diffstat (limited to 'pwmanager/libcrypt/mpi/mpi-cmp.c') (more/less context) (show whitespace changes)
-rw-r--r-- | pwmanager/libcrypt/mpi/mpi-cmp.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/pwmanager/libcrypt/mpi/mpi-cmp.c b/pwmanager/libcrypt/mpi/mpi-cmp.c new file mode 100644 index 0000000..6036255 --- a/dev/null +++ b/pwmanager/libcrypt/mpi/mpi-cmp.c @@ -0,0 +1,74 @@ +/* mpi-cmp.c - MPI functions + * Copyright (C) 1998, 1999, 2001, 2002 Free Software Foundation, Inc. + * + * This file is part of Libgcrypt. + * + * Libgcrypt is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * Libgcrypt 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser 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" + +int +gcry_mpi_cmp_ui( gcry_mpi_t u, unsigned long v ) +{ + mpi_limb_t limb = v; + + _gcry_mpi_normalize( u ); + if( !u->nlimbs && !limb ) + return 0; + if( u->sign ) + return -1; + if( u->nlimbs > 1 ) + return 1; + + if( u->d[0] == limb ) + return 0; + else if( u->d[0] > limb ) + return 1; + else + return -1; +} + +int +gcry_mpi_cmp( gcry_mpi_t u, gcry_mpi_t v ) +{ + mpi_size_t usize, vsize; + int cmp; + + _gcry_mpi_normalize( u ); + _gcry_mpi_normalize( v ); + usize = u->nlimbs; + vsize = v->nlimbs; + if( !u->sign && v->sign ) + return 1; + if( u->sign && !v->sign ) + return -1; + if( usize != vsize && !u->sign && !v->sign ) + return usize - vsize; + if( usize != vsize && u->sign && v->sign ) + return vsize + usize; + if( !usize ) + return 0; + if( !(cmp = _gcry_mpih_cmp( u->d, v->d, usize )) ) + return 0; + if( (cmp < 0?1:0) == (u->sign?1:0)) + return 1; + return -1; +} + + |