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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: mptext-dstr.c,v 1.4 2004/04/08 01:36:15 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 | |
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30 | /*----- Header files ------------------------------------------------------*/ |
31 | |
32 | #include <mLib/dstr.h> |
33 | |
34 | #include "mptext.h" |
35 | |
36 | /*----- Main code ---------------------------------------------------------*/ |
37 | |
38 | /* --- Operations table --- */ |
39 | |
40 | static int get(void *p) |
41 | { |
42 | mptext_dstrctx *c = p; |
43 | if (c->i >= c->d->len) |
44 | return (EOF); |
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45 | return ((unsigned char)c->d->buf[c->i++]); |
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46 | } |
47 | |
48 | static void unget(int ch, void *p) |
49 | { |
50 | mptext_dstrctx *c = p; |
51 | if (ch == EOF || c->i == 0) |
52 | return; |
53 | c->i--; |
54 | } |
55 | |
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56 | static int put(const char *s, size_t sz, void *p) |
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57 | { |
58 | mptext_dstrctx *c = p; |
59 | DPUTM(c->d, s, sz); |
60 | return (0); |
61 | } |
62 | |
63 | const mptext_ops mptext_dstrops = { get, unget, put }; |
64 | |
65 | /* --- Convenience functions --- */ |
66 | |
67 | mp *mp_readdstr(mp *m, dstr *d, size_t *off, int radix) |
68 | { |
69 | mptext_dstrctx c; |
70 | c.d = d; |
71 | c.i = off ? *off : 0; |
72 | m = mp_read(m, radix, &mptext_dstrops, &c); |
73 | if (off) |
74 | *off = c.i; |
75 | return (m); |
76 | } |
77 | |
78 | int mp_writedstr(mp *m, dstr *d, int radix) |
79 | { |
80 | mptext_dstrctx c; |
81 | int rc; |
82 | c.d = d; |
83 | rc = mp_write(m, radix, &mptext_dstrops, &c); |
84 | DPUTZ(d); |
85 | return (rc); |
86 | } |
87 | |
88 | /*----- That's all, folks -------------------------------------------------*/ |