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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mp-misc.c,v 1.4 2004/04/08 01:36:15 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 | |
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30 | /*----- Header files ------------------------------------------------------*/ |
31 | |
32 | #include "mp.h" |
33 | |
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34 | /*----- Basic manipulation ------------------------------------------------*/ |
35 | |
36 | /* --- @mp_shrink@ --- * |
37 | * |
38 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
39 | * |
40 | * Returns: --- |
41 | * |
42 | * Use: Reduces the recorded length of an integer. This doesn't |
43 | * reduce the amount of memory used, although it can improve |
44 | * performance a bit. To reduce memory, use @mp_minimize@ |
45 | * instead. This can't change the value of an integer, and is |
46 | * therefore safe to use even when there are multiple |
47 | * references. |
48 | */ |
49 | |
50 | void mp_shrink(mp *m) { MP_SHRINK(m); } |
51 | |
52 | /* --- @mp_minimize@ --- * |
53 | * |
54 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
55 | * |
56 | * Returns: --- |
57 | * |
58 | * Use: Reduces the amount of memory an integer uses. It's best to |
59 | * do this to numbers which aren't going to change in the |
60 | * future. |
61 | */ |
62 | |
63 | void mp_minimize(mp *m) |
64 | { |
65 | MP_SHRINK(m); |
66 | MP_RESIZE(m, MP_LEN(m)); |
67 | } |
68 | |
69 | /*----- Bit scanning ------------------------------------------------------*/ |
70 | |
71 | /* --- @mp_scan@ --- * |
72 | * |
73 | * Arguments: @mpscan *sc@ = pointer to bitscanner block |
74 | * @const mp *m@ = pointer to a multiprecision integer |
75 | * |
76 | * Returns: --- |
77 | * |
78 | * Use: Initializes a bitscanner on a multiprecision integer. |
79 | */ |
80 | |
81 | void mp_scan(mpscan *sc, const mp *m) { MP_SCAN(sc, m); } |
82 | |
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83 | /* --- @mp_scan@ --- * |
84 | * |
85 | * Arguments: @mpscan *sc@ = pointer to bitscanner block |
86 | * @const mp *m@ = pointer to a multiprecision integer |
87 | * |
88 | * Returns: --- |
89 | * |
90 | * Use: Initializes a reverse bitscanner on a multiprecision |
91 | * integer. |
92 | */ |
93 | |
94 | void mp_rscan(mpscan *sc, const mp *m) { MP_RSCAN(sc, m); } |
95 | |
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96 | /*----- That's all, folks -------------------------------------------------*/ |