YAZ  5.23.1
odr_choice.c
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1 /* This file is part of the YAZ toolkit.
2  * Copyright (C) Index Data
3  * See the file LICENSE for details.
4  */
5 
11 #if HAVE_CONFIG_H
12 #include <config.h>
13 #endif
14 
15 #include "odr-priv.h"
16 
17 int odr_choice(ODR o, Odr_arm arm[], void *p, void *whichp,
18  const char *name)
19 {
20  int i, cl = -1, tg, cn, *which = (int *)whichp, bias = o->op->choice_bias;
21 
22  if (o->error)
23  return 0;
24  if (o->direction != ODR_DECODE && !*(char**)p)
25  return 0;
26 
27  if (o->direction == ODR_DECODE)
28  {
29  *which = -1;
30  *(char**)p = 0;
31  }
32  o->op->choice_bias = -1;
33 
34  if (o->direction == ODR_PRINT)
35  {
36  if (name)
37  {
38  odr_prname(o, name);
39  odr_printf(o, "choice\n");
40  }
41  }
42  for (i = 0; arm[i].fun; i++)
43  {
44  if (o->direction == ODR_DECODE)
45  {
46  if (bias >= 0 && bias != arm[i].which)
47  continue;
48  *which = arm[i].which;
49  }
50  else if (*which != arm[i].which)
51  continue;
52 
53  if (arm[i].tagmode != ODR_NONE)
54  {
55  if (o->direction == ODR_DECODE && cl < 0)
56  {
57  if (o->op->stack_top && !odr_constructed_more(o))
58  return 0;
59  if (ber_dectag(o->op->bp, &cl, &tg, &cn, odr_max(o)) <= 0)
60  return 0;
61  }
62  else if (o->direction != ODR_DECODE)
63  {
64  cl = arm[i].zclass;
65  tg = arm[i].tag;
66  }
67  if (tg == arm[i].tag && cl == arm[i].zclass)
68  {
69  if (arm[i].tagmode == ODR_IMPLICIT)
70  {
71  odr_implicit_settag(o, cl, tg);
72  return (*arm[i].fun)(o, (char **)p, 0, arm[i].name);
73  }
74  /* explicit */
75  if (!odr_constructed_begin(o, p, cl, tg, 0))
76  return 0;
77  return (*arm[i].fun)(o, (char **)p, 0, arm[i].name) &&
79  }
80  }
81  else /* no tagging. Have to poll type */
82  {
83  if ((*arm[i].fun)(o, (char **)p, 1, arm[i].name) && *(char**)p)
84  return 1;
85  }
86  }
87  return 0;
88 }
89 
90 void odr_choice_bias(ODR o, int what)
91 {
92  if (o->op->enable_bias)
93  o->op->choice_bias = what;
94 }
95 
96 void odr_choice_enable_bias (ODR o, int mode)
97 {
98  o->op->enable_bias = mode;
99 }
100 /*
101  * Local variables:
102  * c-basic-offset: 4
103  * c-file-style: "Stroustrup"
104  * indent-tabs-mode: nil
105  * End:
106  * vim: shiftwidth=4 tabstop=8 expandtab
107  */
108 
struct odr_constack * stack_top
Definition: odr-priv.h:92
void odr_choice_bias(ODR o, int what)
Definition: odr_choice.c:90
#define ODR_PRINT
Definition: odr.h:97
Odr_fun fun
Definition: odr.h:143
int choice_bias
Definition: odr-priv.h:111
int error
Definition: odr.h:128
char * name
Definition: initopt.c:18
int odr_constructed_begin(ODR o, void *xxp, int zclass, int tag, const char *name)
Definition: odr_cons.c:24
int zclass
Definition: odr.h:140
void odr_prname(ODR o, const char *name)
Definition: odr_util.c:18
Internal ODR definitions.
int direction
Definition: odr.h:126
#define ODR_NONE
Definition: odr.h:58
int odr_constructed_more(ODR o)
Definition: odr_cons.c:136
int odr_choice(ODR o, Odr_arm arm[], void *p, void *whichp, const char *name)
Definition: odr_choice.c:17
#define odr_max(o)
Definition: odr-priv.h:47
int which
Definition: odr.h:142
Definition: odr.h:137
struct Odr_private * op
Definition: odr.h:132
const char * bp
Definition: odr-priv.h:85
Definition: odr.h:124
int ber_dectag(const char *cp, int *zclass, int *tag, int *constructed, int max)
Decodes BER identifier octets.
Definition: ber_tag.c:165
void odr_choice_enable_bias(ODR o, int mode)
Definition: odr_choice.c:96
#define ODR_IMPLICIT
Definition: odr.h:59
int tag
Definition: odr.h:141
int enable_bias
Definition: odr-priv.h:110
int odr_constructed_end(ODR o)
Definition: odr_cons.c:148
void odr_printf(ODR o, const char *fmt,...)
Definition: odr.c:290
#define ODR_DECODE
Definition: odr.h:95
int odr_implicit_settag(ODR o, int zclass, int tag)
Definition: odr_tag.c:32