3 * $Id: mptext-string.c,v 1.5 2004/04/08 01:36:15 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 /*----- Header files ------------------------------------------------------*/
36 /*----- Main code ---------------------------------------------------------*/
38 /* --- Operations table --- */
40 static int get(void *p
)
42 mptext_stringctx
*c
= p
;
45 return ((unsigned char)*c
->buf
++);
48 static void unget(int ch
, void *p
)
50 mptext_stringctx
*c
= p
;
55 static int put(const char *s
, size_t sz
, void *p
)
57 mptext_stringctx
*c
= p
;
59 if (sz
> c
->lim
- c
->buf
) {
64 memcpy(c
->buf
, s
, sz
);
70 const mptext_ops mptext_stringops
= { get
, unget
, put
};
72 /* --- Convenience functions --- */
74 mp
*mp_readstring(mp
*m
, const char *p
, char **end
, int radix
)
77 c
.buf
= (/*unconst */ char *)p
;
78 c
.lim
= c
.buf
+ strlen(p
);
79 m
= mp_read(m
, radix
, &mptext_stringops
, &c
);
85 int mp_writestring(mp
*m
, char *p
, size_t sz
, int radix
)
93 rc
= mp_write(m
, radix
, &mptext_stringops
, &c
);
98 /*----- That's all, folks -------------------------------------------------*/