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 1.12 1996-10-08 12:58:17 adam
8 * New ODR function, odr_choice_enable_bias, to control behaviour of
11 * Revision 1.11 1995/09/29 17:12:23 quinn
14 * Revision 1.10 1995/09/27 15:02:58 quinn
15 * Modified function heads & prototypes.
17 * Revision 1.9 1995/08/15 12:00:23 quinn
20 * Revision 1.8 1995/06/19 17:01:51 quinn
21 * This should bring us in sync with the version distributed as 1.0b
23 * Revision 1.7 1995/06/19 13:06:50 quinn
24 * Fixed simple bug in the code to handle untagged choice elements.
26 * Revision 1.6 1995/05/16 08:50:53 quinn
27 * License, documentation, and memory fixes
29 * Revision 1.5 1995/03/18 12:16:31 quinn
32 * Revision 1.4 1995/03/14 16:59:38 quinn
33 * Added odr_constructed_more check
35 * Revision 1.3 1995/03/08 12:12:22 quinn
36 * Added better error checking.
38 * Revision 1.2 1995/02/09 15:51:48 quinn
41 * Revision 1.1 1995/02/07 17:52:59 quinn
42 * A damn mess, but now things work, I think.
48 int odr_choice(ODR o, Odr_arm arm[], void *p, void *whichp)
50 int i, cl = -1, tg, cn, *which = whichp, bias = o->choice_bias;
54 if (o->direction != ODR_DECODE && !*(char**)p)
57 for (i = 0; arm[i].fun; i++)
59 if (o->direction == ODR_DECODE)
61 if (bias >= 0 && bias != arm[i].which)
63 *which = arm[i].which;
65 else if (*which != arm[i].which)
68 if (arm[i].tagmode != ODR_NONE)
70 if (o->direction == ODR_DECODE && cl < 0)
72 if (o->stackp > -1 && !odr_constructed_more(o))
74 if (ber_dectag(o->bp, &cl, &tg, &cn) <= 0)
77 else if (o->direction != ODR_DECODE)
82 if (tg == arm[i].tag && cl == arm[i].class)
84 if (arm[i].tagmode == ODR_IMPLICIT)
86 odr_implicit_settag(o, cl, tg);
87 return (*arm[i].fun)(o, p, 0);
90 if (!odr_constructed_begin(o, p, cl, tg))
92 return (*arm[i].fun)(o, p, 0) &&
93 odr_constructed_end(o);
96 else /* no tagging. Have to poll type */
98 if ((*arm[i].fun)(o, p, 1) && *(char**)p)
107 void odr_choice_bias(ODR o, int what)
110 o->choice_bias = what;
113 void odr_choice_enable_bias (ODR o, int mode)
115 o->enable_bias = mode;