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 -------------------------------------------------*/