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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mptext-dstr.c,v 1.3 2000/08/04 23:23:44 mdw Exp $ |
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4 | * |
5 | * Reading and writing large integers on strings |
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-dstr.c,v $ |
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33 | * Revision 1.3 2000/08/04 23:23:44 mdw |
34 | * Various <ctype.h> fixes. |
35 | * |
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36 | * Revision 1.2 1999/12/22 15:56:21 mdw |
37 | * Make the buffer passed to `put' op constant. |
38 | * |
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39 | * Revision 1.1 1999/11/17 18:02:16 mdw |
40 | * New multiprecision integer arithmetic suite. |
41 | * |
42 | */ |
43 | |
44 | /*----- Header files ------------------------------------------------------*/ |
45 | |
46 | #include <mLib/dstr.h> |
47 | |
48 | #include "mptext.h" |
49 | |
50 | /*----- Main code ---------------------------------------------------------*/ |
51 | |
52 | /* --- Operations table --- */ |
53 | |
54 | static int get(void *p) |
55 | { |
56 | mptext_dstrctx *c = p; |
57 | if (c->i >= c->d->len) |
58 | return (EOF); |
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59 | return ((unsigned char)c->d->buf[c->i++]); |
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60 | } |
61 | |
62 | static void unget(int ch, void *p) |
63 | { |
64 | mptext_dstrctx *c = p; |
65 | if (ch == EOF || c->i == 0) |
66 | return; |
67 | c->i--; |
68 | } |
69 | |
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70 | static int put(const char *s, size_t sz, void *p) |
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71 | { |
72 | mptext_dstrctx *c = p; |
73 | DPUTM(c->d, s, sz); |
74 | return (0); |
75 | } |
76 | |
77 | const mptext_ops mptext_dstrops = { get, unget, put }; |
78 | |
79 | /* --- Convenience functions --- */ |
80 | |
81 | mp *mp_readdstr(mp *m, dstr *d, size_t *off, int radix) |
82 | { |
83 | mptext_dstrctx c; |
84 | c.d = d; |
85 | c.i = off ? *off : 0; |
86 | m = mp_read(m, radix, &mptext_dstrops, &c); |
87 | if (off) |
88 | *off = c.i; |
89 | return (m); |
90 | } |
91 | |
92 | int mp_writedstr(mp *m, dstr *d, int radix) |
93 | { |
94 | mptext_dstrctx c; |
95 | int rc; |
96 | c.d = d; |
97 | rc = mp_write(m, radix, &mptext_dstrops, &c); |
98 | DPUTZ(d); |
99 | return (rc); |
100 | } |
101 | |
102 | /*----- That's all, folks -------------------------------------------------*/ |