2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.9 1995-09-28 10:12:39 quinn
8 * Windows-support changes
10 * Revision 1.8 1995/09/27 15:02:55 quinn
11 * Modified function heads & prototypes.
13 * Revision 1.7 1995/05/16 08:50:44 quinn
14 * License, documentation, and memory fixes
16 * Revision 1.6 1995/04/18 08:15:14 quinn
17 * Added dynamic memory allocation on encoding (whew). Code is now somewhat
18 * neater. We'll make the same change for decoding one day.
20 * Revision 1.5 1995/03/27 15:01:44 quinn
21 * Added include of sys/types to further portability
23 * Revision 1.4 1995/03/08 12:12:07 quinn
24 * Added better error checking.
26 * Revision 1.3 1995/02/09 15:51:46 quinn
29 * Revision 1.2 1995/02/07 17:52:58 quinn
30 * A damn mess, but now things work, I think.
32 * Revision 1.1 1995/02/02 16:21:52 quinn
38 #include <sys/types.h>
42 #include <netinet/in.h> /* for htons... */
46 static int ber_encinteger(ODR o, int val);
47 static int ber_decinteger(unsigned char *buf, int *val);
49 int MDF ber_integer(ODR o, int *val)
56 if ((res = ber_decinteger(o->bp, val)) <= 0)
65 if ((res = ber_encinteger(o, *val)) < 0)
68 case ODR_PRINT: return 1;
69 default: o->error = OOTHER; return 0;
74 * Returns: number of bytes written or -1 for error (out of bounds).
76 int ber_encinteger(ODR o, int val)
80 union { int i; unsigned char c[sizeof(int)]; } tmp;
83 if (odr_putc(o, 0) < 0) /* dummy */
86 tmp.i = htonl(val); /* ensure that that we're big-endian */
87 for (a = 0; a < sizeof(int) - 1; a++) /* skip superfluous octets */
88 if (!((tmp.c[a] == 0 && !(tmp.c[a+1] & 0X80)) ||
89 (tmp.c[a] == 0XFF && (tmp.c[a+1] & 0X80))))
91 len = sizeof(int) - a;
92 if (odr_write(o, (unsigned char*) tmp.c + a, len) < 0)
94 odr_seek(o, ODR_S_SET, lenpos);
95 if (ber_enclen(o, len, 1, 1) != 1)
97 odr_seek(o, ODR_S_END, 0);
99 fprintf(stderr, "[val=%d]", val);
105 * Returns: Number of bytes read or 0 if no match, -1 if error.
107 int ber_decinteger(unsigned char *buf, int *val)
109 unsigned char *b = buf, fill;
110 int res, len, remains;
111 union { int i; unsigned char c[sizeof(int)]; } tmp;
113 if ((res = ber_declen(b, &len)) < 0)
115 if (len > sizeof(int)) /* let's be reasonable, here */
119 remains = sizeof(int) - len;
120 memcpy(tmp.c + remains, b, len);
125 memset(tmp.c, fill, remains);
130 fprintf(stderr, "[val=%d]", *val);