2 * Copyright (c) 1995-1999, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * $Log: odr_choice.c,v $
7 * Revision 1.16 1999-04-20 09:56:48 adam
8 * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
9 * Modified all encoders/decoders to reflect this change.
11 * Revision 1.15 1998/02/11 11:53:34 adam
12 * Changed code so that it compiles as C++.
14 * Revision 1.14 1997/05/14 06:53:57 adam
17 * Revision 1.13 1997/04/30 08:52:10 quinn
20 * Revision 1.12 1996/10/08 12:58:17 adam
21 * New ODR function, odr_choice_enable_bias, to control behaviour of
24 * Revision 1.11 1995/09/29 17:12:23 quinn
27 * Revision 1.10 1995/09/27 15:02:58 quinn
28 * Modified function heads & prototypes.
30 * Revision 1.9 1995/08/15 12:00:23 quinn
33 * Revision 1.8 1995/06/19 17:01:51 quinn
34 * This should bring us in sync with the version distributed as 1.0b
36 * Revision 1.7 1995/06/19 13:06:50 quinn
37 * Fixed simple bug in the code to handle untagged choice elements.
39 * Revision 1.6 1995/05/16 08:50:53 quinn
40 * License, documentation, and memory fixes
42 * Revision 1.5 1995/03/18 12:16:31 quinn
45 * Revision 1.4 1995/03/14 16:59:38 quinn
46 * Added odr_constructed_more check
48 * Revision 1.3 1995/03/08 12:12:22 quinn
49 * Added better error checking.
51 * Revision 1.2 1995/02/09 15:51:48 quinn
54 * Revision 1.1 1995/02/07 17:52:59 quinn
55 * A damn mess, but now things work, I think.
61 int odr_choice(ODR o, Odr_arm arm[], void *p, void *whichp,
64 int i, cl = -1, tg, cn, *which = (int *)whichp, bias = o->choice_bias;
68 if (o->direction != ODR_DECODE && !*(char**)p)
72 if (o->direction == ODR_PRINT)
77 fprintf (o->print, "choice\n");
80 for (i = 0; arm[i].fun; i++)
82 if (o->direction == ODR_DECODE)
84 if (bias >= 0 && bias != arm[i].which)
86 *which = arm[i].which;
88 else if (*which != arm[i].which)
91 if (arm[i].tagmode != ODR_NONE)
93 if (o->direction == ODR_DECODE && cl < 0)
95 if (o->stackp > -1 && !odr_constructed_more(o))
97 if (ber_dectag(o->bp, &cl, &tg, &cn) <= 0)
100 else if (o->direction != ODR_DECODE)
105 if (tg == arm[i].tag && cl == arm[i].zclass)
107 if (arm[i].tagmode == ODR_IMPLICIT)
109 odr_implicit_settag(o, cl, tg);
110 return (*arm[i].fun)(o, (char **)p, 0, arm[i].name);
113 if (!odr_constructed_begin(o, p, cl, tg, 0))
115 return (*arm[i].fun)(o, (char **)p, 0, arm[i].name) &&
116 odr_constructed_end(o);
119 else /* no tagging. Have to poll type */
121 if ((*arm[i].fun)(o, (char **)p, 1, arm[i].name) && *(char**)p)
130 void odr_choice_bias(ODR o, int what)
133 o->choice_bias = what;
136 void odr_choice_enable_bias (ODR o, int mode)
138 o->enable_bias = mode;