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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: field.c,v 1.2 2004/03/21 22:52:06 mdw Exp $ |
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4 | * |
5 | * Abstract field operations |
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6 | * |
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7 | * (c) 2001 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: field.c,v $ |
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33 | * Revision 1.2 2004/03/21 22:52:06 mdw |
34 | * Merge and close elliptic curve branch. |
35 | * |
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36 | * Revision 1.1.4.1 2003/06/10 13:43:53 mdw |
37 | * Simple (non-projective) curves over prime fields now seem to work. |
38 | * |
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39 | * Revision 1.1 2001/05/07 17:30:13 mdw |
40 | * Add an internal-representation no-op function. |
41 | * |
42 | */ |
43 | |
44 | /*----- Header files ------------------------------------------------------*/ |
45 | |
46 | #include "field.h" |
47 | #include "mp.h" |
48 | |
49 | /*----- Main code ---------------------------------------------------------*/ |
50 | |
51 | /* --- @field_id@ --- * |
52 | * |
53 | * Arguments: @field *f@ = pointer to a field |
54 | * @mp *d@ = a destination element |
55 | * @mp *x@ = a source element |
56 | * |
57 | * Returns: The result element. |
58 | * |
59 | * Use: An identity operation which can be used if your field has no |
60 | * internal representation. |
61 | */ |
62 | |
63 | mp *field_id(field *f, mp *d, mp *x) |
64 | { |
65 | x = MP_COPY(x); |
66 | if (d) MP_DROP(d); |
67 | return (x); |
68 | } |
69 | |
70 | /*----- That's all, folks -------------------------------------------------*/ |