YAZ  5.23.1
odr_null.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  */
9 #if HAVE_CONFIG_H
10 #include <config.h>
11 #endif
12 
13 #include "odr-priv.h"
14 
15 /*
16  * Top level null en/decoder.
17  * Returns 1 on success, 0 on error.
18  */
19 int odr_null(ODR o, Odr_null **p, int opt, const char *name)
20 {
21  int res, cons = 0;
22 
23  if (o->error)
24  return 0;
25  if (o->op->t_class < 0)
26  {
27  o->op->t_class = ODR_UNIVERSAL;
28  o->op->t_tag = ODR_NULL;
29  }
30  res = ber_tag(o, p, o->op->t_class, o->op->t_tag, &cons, opt, name);
31  if (res < 0)
32  return 0;
33  if (!res)
34  return odr_missing(o, opt, name);
35  if (o->direction == ODR_PRINT)
36  {
37  odr_prname(o, name);
38  odr_printf(o, "NULL\n");
39  return 1;
40  }
41  if (cons)
42  {
43 #ifdef ODR_STRICT_NULL
44  odr_seterror(OPROTO, 42);
45  return 0;
46 #else
47  /* Warning: Bad NULL */
48 #endif
49  }
50  if (o->direction == ODR_DECODE)
51  *p = odr_nullval();
52  return ber_null(o);
53 }
54 /*
55  * Local variables:
56  * c-basic-offset: 4
57  * c-file-style: "Stroustrup"
58  * indent-tabs-mode: nil
59  * End:
60  * vim: shiftwidth=4 tabstop=8 expandtab
61  */
62 
void odr_seterror(ODR o, int error, int id)
Definition: odr.c:118
int t_class
Definition: odr-priv.h:107
#define ODR_UNIVERSAL
Definition: odr.h:65
#define ODR_PRINT
Definition: odr.h:97
int error
Definition: odr.h:128
char * name
Definition: initopt.c:18
int ber_tag(ODR o, void *p, int zclass, int tag, int *constructed, int opt, const char *name)
Encode/decode BER tags.
Definition: ber_tag.c:34
void odr_prname(ODR o, const char *name)
Definition: odr_util.c:18
Internal ODR definitions.
#define ODR_NULL
Definition: odr.h:77
int direction
Definition: odr.h:126
#define OPROTO
Definition: odr.h:157
Odr_null * odr_nullval(void)
Definition: odr.c:30
struct Odr_private * op
Definition: odr.h:132
int odr_null(ODR o, Odr_null **p, int opt, const char *name)
Definition: odr_null.c:19
int odr_missing(ODR o, int opt, const char *name)
Definition: odr_util.c:82
Definition: odr.h:124
int ber_null(ODR o)
Definition: ber_null.c:22
int opt
Definition: initopt.c:19
void odr_printf(ODR o, const char *fmt,...)
Definition: odr.c:290
#define ODR_DECODE
Definition: odr.h:95
void Odr_null
Definition: odr.h:105