| 1 | |
| 2 | * Copyright (C) 1998, 1999 Free Software Foundation, Inc.
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| 3 | *
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| 4 | * This file is part of GnuPG.
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| 5 | *
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| 6 | * GnuPG is free software; you can redistribute it and/or modify
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| 7 | * it under the terms of the GNU General Public License as published by
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| 8 | * the Free Software Foundation; either version 2 of the License, or
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| 9 | * (at your option) any later version.
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| 10 | *
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| 11 | * GnuPG is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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| 19 |
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| 20 |
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| 21 | #include <linux/export.h>
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| 22 |
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| 23 | #include "mpi-internal.h"
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| 24 |
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| 25 | int mpi_cmp_ui(MPI u, unsigned long v)
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| 26 | {
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| 27 | mpi_limb_t limb = v;
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| 28 |
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| 29 | mpi_normalize(u);
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| 30 | if (u->nlimbs == 0) {
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| 31 | if (v == 0)
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| 32 | return 0;
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| 33 | else
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| 34 | return -1;
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| 35 | }
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| 36 | if (u->sign)
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| 37 | return -1;
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| 38 | if (u->nlimbs > 1)
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| 39 | return 1;
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| 40 |
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| 41 | if (u->d[0] == limb)
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| 42 | return 0;
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| 43 | else if (u->d[0] > limb)
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| 44 | return 1;
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| 45 | else
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| 46 | return -1;
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| 47 | }
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| 48 | EXPORT_SYMBOL_GPL(mpi_cmp_ui);
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| 49 |
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| 50 | int mpi_cmp(MPI u, MPI v)
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| 51 | {
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| 52 | mpi_size_t usize, vsize;
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| 53 | int cmp;
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| 54 |
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| 55 | mpi_normalize(u);
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| 56 | mpi_normalize(v);
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| 57 | usize = u->nlimbs;
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| 58 | vsize = v->nlimbs;
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| 59 | if (!u->sign && v->sign)
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| 60 | return 1;
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| 61 | if (u->sign && !v->sign)
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| 62 | return -1;
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| 63 | if (usize != vsize && !u->sign && !v->sign)
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| 64 | return usize - vsize;
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| 65 | if (usize != vsize && u->sign && v->sign)
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| 66 | return vsize - usize;
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| 67 | if (!usize)
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| 68 | return 0;
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| 69 | cmp = mpihelp_cmp(u->d, v->d, usize);
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| 70 | if (u->sign)
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| 71 | return -cmp;
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| 72 | return cmp;
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| 73 | }
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| 74 | EXPORT_SYMBOL_GPL(mpi_cmp);
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