2 * Copyright (c) 1995-2000, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.18 2000-02-29 13:44:55 adam
8 * Check for config.h (currently not generated).
10 * Revision 1.17 2000/02/28 11:20:06 adam
11 * Using autoconf. New definitions: YAZ_BEGIN_CDECL/YAZ_END_CDECL.
13 * Revision 1.16 2000/01/31 13:15:21 adam
14 * Removed uses of assert(3). Cleanup of ODR. CCL parser update so
15 * that some characters are not surrounded by spaces in resulting term.
18 * Revision 1.15 1999/11/30 13:47:11 adam
19 * Improved installation. Moved header files to include/yaz.
21 * Revision 1.14 1999/05/26 07:49:35 adam
24 * Revision 1.13 1999/01/08 11:23:22 adam
25 * Added const modifier to some of the BER/ODR encoding routines.
27 * Revision 1.12 1996/07/06 19:58:33 quinn
28 * System headerfiles gathered in yconfig
30 * Revision 1.11 1995/09/29 17:12:16 quinn
33 * Revision 1.10 1995/09/29 17:01:50 quinn
36 * Revision 1.9 1995/09/28 10:12:39 quinn
37 * Windows-support changes
39 * Revision 1.8 1995/09/27 15:02:55 quinn
40 * Modified function heads & prototypes.
42 * Revision 1.7 1995/05/16 08:50:44 quinn
43 * License, documentation, and memory fixes
45 * Revision 1.6 1995/04/18 08:15:14 quinn
46 * Added dynamic memory allocation on encoding (whew). Code is now somewhat
47 * neater. We'll make the same change for decoding one day.
49 * Revision 1.5 1995/03/27 15:01:44 quinn
50 * Added include of sys/types to further portability
52 * Revision 1.4 1995/03/08 12:12:07 quinn
53 * Added better error checking.
55 * Revision 1.3 1995/02/09 15:51:46 quinn
58 * Revision 1.2 1995/02/07 17:52:58 quinn
59 * A damn mess, but now things work, I think.
61 * Revision 1.1 1995/02/02 16:21:52 quinn
74 #include <arpa/inet.h>
79 static int ber_encinteger(ODR o, int val);
80 static int ber_decinteger(const unsigned char *buf, int *val);
82 int ber_integer(ODR o, int *val)
89 if ((res = ber_decinteger(o->bp, val)) <= 0)
97 if ((res = ber_encinteger(o, *val)) < 0)
100 case ODR_PRINT: return 1;
101 default: o->error = OOTHER; return 0;
106 * Returns: number of bytes written or -1 for error (out of bounds).
108 int ber_encinteger(ODR o, int val)
112 union { int i; unsigned char c[sizeof(int)]; } tmp;
114 lenpos = odr_tell(o);
115 if (odr_putc(o, 0) < 0) /* dummy */
117 tmp.i = htonl(val); /* ensure that that we're big-endian */
118 for (a = 0; a < (int) sizeof(int) - 1; a++) /* skip superfluous octets */
119 if (!((tmp.c[a] == 0 && !(tmp.c[a+1] & 0X80)) ||
120 (tmp.c[a] == 0XFF && (tmp.c[a+1] & 0X80))))
122 len = sizeof(int) - a;
123 if (odr_write(o, (unsigned char*) tmp.c + a, len) < 0)
125 odr_seek(o, ODR_S_SET, lenpos);
126 if (ber_enclen(o, len, 1, 1) != 1)
128 odr_seek(o, ODR_S_END, 0);
130 fprintf(stderr, "[val=%d]", val);
136 * Returns: Number of bytes read or 0 if no match, -1 if error.
138 int ber_decinteger(const unsigned char *buf, int *val)
140 const unsigned char *b = buf;
142 int res, len, remains;
143 union { int i; unsigned char c[sizeof(int)]; } tmp;
145 if ((res = ber_declen(b, &len)) < 0)
147 if (len > (int) sizeof(int)) /* let's be reasonable, here */
151 remains = sizeof(int) - len;
152 memcpy(tmp.c + remains, b, len);
157 memset(tmp.c, fill, remains);
162 fprintf(stderr, "[val=%d]", *val);