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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mptext-file.c,v 1.2 1999/12/22 15:56:21 mdw Exp $ |
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4 | * |
5 | * Reading and writing large integers on files |
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: mptext-file.c,v $ |
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33 | * Revision 1.2 1999/12/22 15:56:21 mdw |
34 | * Make the buffer passed to `put' op constant. |
35 | * |
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36 | * Revision 1.1 1999/11/17 18:02:16 mdw |
37 | * New multiprecision integer arithmetic suite. |
38 | * |
39 | */ |
40 | |
41 | /*----- Header files ------------------------------------------------------*/ |
42 | |
43 | #include <stdio.h> |
44 | |
45 | #include "mptext.h" |
46 | |
47 | /*----- Main code ---------------------------------------------------------*/ |
48 | |
49 | /* --- Operations table --- */ |
50 | |
51 | static int get(void *p) { FILE *fp = p; return getc(fp); } |
52 | |
53 | static void unget(int ch, void *p) { FILE *fp = p; ungetc(ch, fp); } |
54 | |
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55 | static int put(const char *s, size_t sz, void *p) |
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56 | { |
57 | FILE *fp = p; |
58 | return (fwrite(s, 1, sz, fp) != sz); |
59 | } |
60 | |
61 | const mptext_ops mptext_fileops = { get, unget, put }; |
62 | |
63 | /* --- Convenience functions --- */ |
64 | |
65 | mp *mp_readfile(mp *m, FILE *fp, int radix) |
66 | { |
67 | return mp_read(m, radix, &mptext_fileops, fp); |
68 | } |
69 | |
70 | int mp_writefile(mp *m, FILE *fp, int radix) |
71 | { |
72 | return mp_write(m, radix, &mptext_fileops, fp); |
73 | } |
74 | |
75 | /*----- That's all, folks -------------------------------------------------*/ |