2 * Copyright (c) 1995, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * $Log: odr_choice.c,v $
7 * Revision 1.14 1997-05-14 06:53:57 adam
10 * Revision 1.13 1997/04/30 08:52:10 quinn
13 * Revision 1.12 1996/10/08 12:58:17 adam
14 * New ODR function, odr_choice_enable_bias, to control behaviour of
17 * Revision 1.11 1995/09/29 17:12:23 quinn
20 * Revision 1.10 1995/09/27 15:02:58 quinn
21 * Modified function heads & prototypes.
23 * Revision 1.9 1995/08/15 12:00:23 quinn
26 * Revision 1.8 1995/06/19 17:01:51 quinn
27 * This should bring us in sync with the version distributed as 1.0b
29 * Revision 1.7 1995/06/19 13:06:50 quinn
30 * Fixed simple bug in the code to handle untagged choice elements.
32 * Revision 1.6 1995/05/16 08:50:53 quinn
33 * License, documentation, and memory fixes
35 * Revision 1.5 1995/03/18 12:16:31 quinn
38 * Revision 1.4 1995/03/14 16:59:38 quinn
39 * Added odr_constructed_more check
41 * Revision 1.3 1995/03/08 12:12:22 quinn
42 * Added better error checking.
44 * Revision 1.2 1995/02/09 15:51:48 quinn
47 * Revision 1.1 1995/02/07 17:52:59 quinn
48 * A damn mess, but now things work, I think.
54 int odr_choice(ODR o, Odr_arm arm[], void *p, void *whichp)
56 int i, cl = -1, tg, cn, *which = whichp, bias = o->choice_bias;
60 if (o->direction != ODR_DECODE && !*(char**)p)
63 for (i = 0; arm[i].fun; i++)
65 if (o->direction == ODR_DECODE)
67 if (bias >= 0 && bias != arm[i].which)
69 *which = arm[i].which;
71 else if (*which != arm[i].which)
74 if (arm[i].tagmode != ODR_NONE)
76 if (o->direction == ODR_DECODE && cl < 0)
78 if (o->stackp > -1 && !odr_constructed_more(o))
80 if (ber_dectag(o->bp, &cl, &tg, &cn) <= 0)
83 else if (o->direction != ODR_DECODE)
88 if (tg == arm[i].tag && cl == arm[i].zclass)
90 if (arm[i].tagmode == ODR_IMPLICIT)
92 odr_implicit_settag(o, cl, tg);
93 return (*arm[i].fun)(o, p, 0);
96 if (!odr_constructed_begin(o, p, cl, tg))
98 return (*arm[i].fun)(o, p, 0) &&
99 odr_constructed_end(o);
102 else /* no tagging. Have to poll type */
104 if ((*arm[i].fun)(o, p, 1) && *(char**)p)
113 void odr_choice_bias(ODR o, int what)
116 o->choice_bias = what;
119 void odr_choice_enable_bias (ODR o, int mode)
121 o->enable_bias = mode;