2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.13 1999-01-08 11:23:22 adam
8 * Added const modifier to some of the BER/ODR encoding routines.
10 * Revision 1.12 1996/07/06 19:58:33 quinn
11 * System headerfiles gathered in yconfig
13 * Revision 1.11 1995/09/29 17:12:16 quinn
16 * Revision 1.10 1995/09/29 17:01:50 quinn
19 * Revision 1.9 1995/09/28 10:12:39 quinn
20 * Windows-support changes
22 * Revision 1.8 1995/09/27 15:02:55 quinn
23 * Modified function heads & prototypes.
25 * Revision 1.7 1995/05/16 08:50:44 quinn
26 * License, documentation, and memory fixes
28 * Revision 1.6 1995/04/18 08:15:14 quinn
29 * Added dynamic memory allocation on encoding (whew). Code is now somewhat
30 * neater. We'll make the same change for decoding one day.
32 * Revision 1.5 1995/03/27 15:01:44 quinn
33 * Added include of sys/types to further portability
35 * Revision 1.4 1995/03/08 12:12:07 quinn
36 * Added better error checking.
38 * Revision 1.3 1995/02/09 15:51:46 quinn
41 * Revision 1.2 1995/02/07 17:52:58 quinn
42 * A damn mess, but now things work, I think.
44 * Revision 1.1 1995/02/02 16:21:52 quinn
57 static int ber_encinteger(ODR o, int val);
58 static int ber_decinteger(const unsigned char *buf, int *val);
60 int ber_integer(ODR o, int *val)
67 if ((res = ber_decinteger(o->bp, val)) <= 0)
76 if ((res = ber_encinteger(o, *val)) < 0)
79 case ODR_PRINT: return 1;
80 default: o->error = OOTHER; return 0;
85 * Returns: number of bytes written or -1 for error (out of bounds).
87 int ber_encinteger(ODR o, int val)
91 union { int i; unsigned char c[sizeof(int)]; } tmp;
94 if (odr_putc(o, 0) < 0) /* dummy */
96 tmp.i = htonl(val); /* ensure that that we're big-endian */
97 for (a = 0; a < sizeof(int) - 1; a++) /* skip superfluous octets */
98 if (!((tmp.c[a] == 0 && !(tmp.c[a+1] & 0X80)) ||
99 (tmp.c[a] == 0XFF && (tmp.c[a+1] & 0X80))))
101 len = sizeof(int) - a;
102 if (odr_write(o, (unsigned char*) tmp.c + a, len) < 0)
104 odr_seek(o, ODR_S_SET, lenpos);
105 if (ber_enclen(o, len, 1, 1) != 1)
107 odr_seek(o, ODR_S_END, 0);
109 fprintf(stderr, "[val=%d]", val);
115 * Returns: Number of bytes read or 0 if no match, -1 if error.
117 int ber_decinteger(const unsigned char *buf, int *val)
119 const unsigned char *b = buf;
121 int res, len, remains;
122 union { int i; unsigned char c[sizeof(int)]; } tmp;
124 if ((res = ber_declen(b, &len)) < 0)
126 if (len > sizeof(int)) /* let's be reasonable, here */
130 remains = sizeof(int) - len;
131 memcpy(tmp.c + remains, b, len);
136 memset(tmp.c, fill, remains);
141 fprintf(stderr, "[val=%d]", *val);