3 * $Id: mptext-string.c,v 1.2 1999/12/22 15:56:21 mdw Exp $
5 * Reading and writing large integers on strings
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: mptext-string.c,v $
33 * Revision 1.2 1999/12/22 15:56:21 mdw
34 * Make the buffer passed to `put' op constant.
36 * Revision 1.1 1999/11/17 18:02:16 mdw
37 * New multiprecision integer arithmetic suite.
41 /*----- Header files ------------------------------------------------------*/
47 /*----- Main code ---------------------------------------------------------*/
49 /* --- Operations table --- */
51 static int get(void *p)
53 mptext_stringctx *c = p;
59 static void unget(int ch, void *p)
61 mptext_stringctx *c = p;
66 static int put(const char *s, size_t sz, void *p)
68 mptext_stringctx *c = p;
70 if (sz > c->lim - c->buf) {
75 memcpy(c->buf, s, sz);
81 const mptext_ops mptext_stringops = { get, unget, put };
83 /* --- Convenience functions --- */
85 mp *mp_readstring(mp *m, const char *p, char **end, int radix)
89 c.lim = c.buf + strlen(p);
90 m = mp_read(m, radix, &mptext_stringops, &c);
96 int mp_writestring(mp *m, char *p, size_t sz, int radix)
104 rc = mp_write(m, radix, &mptext_stringops, &c);
109 /*----- That's all, folks -------------------------------------------------*/