mpi-genesis~ 1
mpi-genesis~ 2 * Copyright (C) 1998, 1999 Free Software Foundation, Inc.
mpi-genesis~ 3 *
mpi-genesis~ 4 * This file is part of GnuPG.
mpi-genesis~ 5 *
mpi-genesis~ 6 * GnuPG is free software; you can redistribute it and/or modify
mpi-genesis~ 7 * it under the terms of the GNU General Public License as published by
mpi-genesis~ 8 * the Free Software Foundation; either version 3 of the License, or
mpi-genesis~ 9 * (at your option) any later version.
mpi-genesis~ 10 *
mpi-genesis~ 11 * GnuPG is distributed in the hope that it will be useful,
mpi-genesis~ 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
mpi-genesis~ 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
mpi-genesis~ 14 * GNU General Public License for more details.
mpi-genesis~ 15 *
mpi-genesis~ 16 * You should have received a copy of the GNU General Public License
mpi-genesis~ 17 * along with this program; if not, see <http:
mpi-genesis~ 18 */
mpi-genesis~ 19
mpi-genesis~ 20 #include <config.h>
mpi-genesis~ 21 #include <stdio.h>
mpi-genesis~ 22 #include <stdlib.h>
mpi-genesis~ 23 #include "mpi-internal.h"
mpi-genesis~ 24
mpi-genesis~ 25 int
mpi-genesis~ 26 mpi_cmp_ui( MPI u, unsigned long v )
mpi-genesis~ 27 {
mpi-genesis~ 28 mpi_limb_t limb = v;
mpi-genesis~ 29
mpi-genesis~ 30 mpi_normalize( u );
mpi-genesis~ 31 if( !u->nlimbs && !limb )
mpi-genesis~ 32 return 0;
mpi-genesis~ 33 if( u->sign )
mpi-genesis~ 34 return -1;
mpi-genesis~ 35 if( u->nlimbs > 1 )
mpi-genesis~ 36 return 1;
mpi-genesis~ 37
mpi-genesis~ 38 if( u->d[0] == limb )
mpi-genesis~ 39 return 0;
mpi-genesis~ 40 else if( u->d[0] > limb )
mpi-genesis~ 41 return 1;
mpi-genesis~ 42 else
mpi-genesis~ 43 return -1;
mpi-genesis~ 44 }
mpi-genesis~ 45
mpi-genesis~ 46 int
mpi-genesis~ 47 mpi_cmp( MPI u, MPI v )
mpi-genesis~ 48 {
mpi-genesis~ 49 mpi_size_t usize, vsize;
mpi-genesis~ 50 int cmp;
mpi-genesis~ 51
mpi-genesis~ 52 mpi_normalize( u );
mpi-genesis~ 53 mpi_normalize( v );
mpi-genesis~ 54 usize = u->nlimbs;
mpi-genesis~ 55 vsize = v->nlimbs;
mpi-genesis~ 56 if( !u->sign && v->sign )
mpi-genesis~ 57 return 1;
mpi-genesis~ 58 if( u->sign && !v->sign )
mpi-genesis~ 59 return -1;
mpi-genesis~ 60 if( usize != vsize && !u->sign && !v->sign )
mpi-genesis~ 61 return usize - vsize;
mpi-genesis~ 62 if( usize != vsize && u->sign && v->sign )
mpi-genesis~ 63 return vsize + usize;
mpi-genesis~ 64 if( !usize )
mpi-genesis~ 65 return 0;
mpi-genesis~ 66 if( !(cmp=mpihelp_cmp( u->d, v->d, usize )) )
mpi-genesis~ 67 return 0;
mpi-genesis~ 68 if( (cmp < 0?1:0) == (u->sign?1:0))
mpi-genesis~ 69 return 1;
mpi-genesis~ 70 return -1;
mpi-genesis~ 71 }
mpi-genesis~ 72
mpi-genesis~ 73