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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mp-misc.c,v 1.2 2000/06/17 11:45:09 mdw Exp $ |
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4 | * |
5 | * Miscellaneous multiprecision support functions |
6 | * |
7 | * (c) 1999 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: mp-misc.c,v $ |
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33 | * Revision 1.2 2000/06/17 11:45:09 mdw |
34 | * Major memory management overhaul. Added arena support. Use the secure |
35 | * arena for secret integers. Replace and improve the MP management macros |
36 | * (e.g., replace MP_MODIFY by MP_DEST). |
37 | * |
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38 | * Revision 1.1 1999/11/17 18:02:16 mdw |
39 | * New multiprecision integer arithmetic suite. |
40 | * |
41 | */ |
42 | |
43 | /*----- Header files ------------------------------------------------------*/ |
44 | |
45 | #include "mp.h" |
46 | |
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47 | /*----- Basic manipulation ------------------------------------------------*/ |
48 | |
49 | /* --- @mp_shrink@ --- * |
50 | * |
51 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
52 | * |
53 | * Returns: --- |
54 | * |
55 | * Use: Reduces the recorded length of an integer. This doesn't |
56 | * reduce the amount of memory used, although it can improve |
57 | * performance a bit. To reduce memory, use @mp_minimize@ |
58 | * instead. This can't change the value of an integer, and is |
59 | * therefore safe to use even when there are multiple |
60 | * references. |
61 | */ |
62 | |
63 | void mp_shrink(mp *m) { MP_SHRINK(m); } |
64 | |
65 | /* --- @mp_minimize@ --- * |
66 | * |
67 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
68 | * |
69 | * Returns: --- |
70 | * |
71 | * Use: Reduces the amount of memory an integer uses. It's best to |
72 | * do this to numbers which aren't going to change in the |
73 | * future. |
74 | */ |
75 | |
76 | void mp_minimize(mp *m) |
77 | { |
78 | MP_SHRINK(m); |
79 | MP_RESIZE(m, MP_LEN(m)); |
80 | } |
81 | |
82 | /*----- Bit scanning ------------------------------------------------------*/ |
83 | |
84 | /* --- @mp_scan@ --- * |
85 | * |
86 | * Arguments: @mpscan *sc@ = pointer to bitscanner block |
87 | * @const mp *m@ = pointer to a multiprecision integer |
88 | * |
89 | * Returns: --- |
90 | * |
91 | * Use: Initializes a bitscanner on a multiprecision integer. |
92 | */ |
93 | |
94 | void mp_scan(mpscan *sc, const mp *m) { MP_SCAN(sc, m); } |
95 | |
96 | /*----- That's all, folks -------------------------------------------------*/ |