3 * Reading and writing large integers on strings
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
34 /*----- Main code ---------------------------------------------------------*/
36 /* --- Operations table --- */
38 static int get(void *p)
40 mptext_stringctx *c = p;
43 return ((unsigned char)*c->buf++);
46 static void unget(int ch, void *p)
48 mptext_stringctx *c = p;
53 static int put(const char *s, size_t sz, void *p)
55 mptext_stringctx *c = p;
57 if (sz > c->lim - c->buf) {
62 memcpy(c->buf, s, sz);
68 const mptext_ops mptext_stringops = { get, unget, put };
70 /* --- Convenience functions --- */
72 mp *mp_readstring(mp *m, const char *p, char **end, int radix)
75 c.buf = (/*unconst */ char *)p;
76 c.lim = c.buf + strlen(p);
77 m = mp_read(m, radix, &mptext_stringops, &c);
83 int mp_writestring(mp *m, char *p, size_t sz, int radix)
91 rc = mp_write(m, radix, &mptext_stringops, &c);
96 /*----- That's all, folks -------------------------------------------------*/