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1 | /* -*-c-*- |
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2 | * |
3 | * Miscellaneous multiprecision support functions |
4 | * |
5 | * (c) 1999 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
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28 | /*----- Header files ------------------------------------------------------*/ |
29 | |
30 | #include "mp.h" |
31 | |
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32 | /*----- Basic manipulation ------------------------------------------------*/ |
33 | |
34 | /* --- @mp_shrink@ --- * |
35 | * |
36 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
37 | * |
38 | * Returns: --- |
39 | * |
40 | * Use: Reduces the recorded length of an integer. This doesn't |
41 | * reduce the amount of memory used, although it can improve |
42 | * performance a bit. To reduce memory, use @mp_minimize@ |
43 | * instead. This can't change the value of an integer, and is |
44 | * therefore safe to use even when there are multiple |
45 | * references. |
46 | */ |
47 | |
48 | void mp_shrink(mp *m) { MP_SHRINK(m); } |
49 | |
50 | /* --- @mp_minimize@ --- * |
51 | * |
52 | * Arguments: @mp *m@ = pointer to a multiprecision integer |
53 | * |
54 | * Returns: --- |
55 | * |
56 | * Use: Reduces the amount of memory an integer uses. It's best to |
57 | * do this to numbers which aren't going to change in the |
58 | * future. |
59 | */ |
60 | |
61 | void mp_minimize(mp *m) |
62 | { |
63 | MP_SHRINK(m); |
64 | MP_RESIZE(m, MP_LEN(m)); |
65 | } |
66 | |
67 | /*----- Bit scanning ------------------------------------------------------*/ |
68 | |
69 | /* --- @mp_scan@ --- * |
70 | * |
71 | * Arguments: @mpscan *sc@ = pointer to bitscanner block |
72 | * @const mp *m@ = pointer to a multiprecision integer |
73 | * |
74 | * Returns: --- |
75 | * |
76 | * Use: Initializes a bitscanner on a multiprecision integer. |
77 | */ |
78 | |
79 | void mp_scan(mpscan *sc, const mp *m) { MP_SCAN(sc, m); } |
80 | |
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81 | /* --- @mp_scan@ --- * |
82 | * |
83 | * Arguments: @mpscan *sc@ = pointer to bitscanner block |
84 | * @const mp *m@ = pointer to a multiprecision integer |
85 | * |
86 | * Returns: --- |
87 | * |
88 | * Use: Initializes a reverse bitscanner on a multiprecision |
89 | * integer. |
90 | */ |
91 | |
92 | void mp_rscan(mpscan *sc, const mp *m) { MP_RSCAN(sc, m); } |
93 | |
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94 | /*----- That's all, folks -------------------------------------------------*/ |