| 1 | /*
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| 2 | * Copyright (c) 1995-2000, Index Data
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| 3 | * See the file LICENSE for details.
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| 4 | * Sebastian Hammer, Adam Dickmeiss
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| 5 | *
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| 6 | * $Log$
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| 7 | * Revision 1.1 2000/08/03 03:11:22 johnmcp
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| 8 | * Added the YAZ toolkit source to the packages directory (for z39.50 stuff)
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| 9 | *
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| 10 | * Revision 1.13 2000/02/29 13:44:55 adam
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| 11 | * Check for config.h (currently not generated).
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| 12 | *
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| 13 | * Revision 1.12 1999/11/30 13:47:11 adam
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| 14 | * Improved installation. Moved header files to include/yaz.
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| 15 | *
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| 16 | * Revision 1.11 1999/04/20 09:56:48 adam
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| 17 | * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
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| 18 | * Modified all encoders/decoders to reflect this change.
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| 19 | *
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| 20 | * Revision 1.10 1997/11/24 11:33:56 adam
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| 21 | * Using function odr_nullval() instead of global ODR_NULLVAL when
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| 22 | * appropriate.
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| 23 | *
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| 24 | * Revision 1.9 1995/10/18 16:12:56 quinn
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| 25 | * Better diagnostics. Added special case in NULL to handle WAIS server.
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| 26 | *
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| 27 | * Revision 1.8 1995/09/29 17:12:24 quinn
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| 28 | * Smallish
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| 29 | *
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| 30 | * Revision 1.7 1995/09/27 15:02:59 quinn
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| 31 | * Modified function heads & prototypes.
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| 32 | *
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| 33 | * Revision 1.6 1995/05/22 11:32:03 quinn
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| 34 | * Fixing Interface to odr_null.
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| 35 | *
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| 36 | * Revision 1.5 1995/05/16 08:50:56 quinn
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| 37 | * License, documentation, and memory fixes
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| 38 | *
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| 39 | * Revision 1.4 1995/03/08 12:12:26 quinn
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| 40 | * Added better error checking.
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| 41 | *
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| 42 | * Revision 1.3 1995/02/10 18:57:25 quinn
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| 43 | * More in the way of error-checking.
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| 44 | *
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| 45 | * Revision 1.2 1995/02/09 15:51:49 quinn
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| 46 | * Works better now.
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| 47 | *
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| 48 | * Revision 1.1 1995/02/02 16:21:54 quinn
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| 49 | * First kick.
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| 50 | *
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| 51 | */
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| 52 | #if HAVE_CONFIG_H
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| 53 | #include <config.h>
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| 54 | #endif
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| 55 |
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| 56 | #include <yaz/odr.h>
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| 57 |
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| 58 | /*
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| 59 | * Top level null en/decoder.
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| 60 | * Returns 1 on success, 0 on error.
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| 61 | */
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| 62 | int odr_null(ODR o, Odr_null **p, int opt, const char *name)
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| 63 | {
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| 64 | int res, cons = 0;
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| 65 |
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| 66 | if (o->error)
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| 67 | return 0;
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| 68 | if (o->t_class < 0)
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| 69 | {
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| 70 | o->t_class = ODR_UNIVERSAL;
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| 71 | o->t_tag = ODR_NULL;
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| 72 | }
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| 73 | if ((res = ber_tag(o, p, o->t_class, o->t_tag, &cons, opt)) < 0)
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| 74 | return 0;
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| 75 | if (!res)
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| 76 | return opt;
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| 77 | if (o->direction == ODR_PRINT)
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| 78 | {
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| 79 | odr_prname(o, name);
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| 80 | fprintf(o->print, "NULL\n");
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| 81 | return 1;
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| 82 | }
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| 83 | if (cons)
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| 84 | {
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| 85 | #ifdef ODR_STRICT_NULL
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| 86 | o->error = OPROTO;
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| 87 | return 0;
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| 88 | #else
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| 89 | fprintf(stderr, "odr: Warning: Bad NULL\n");
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| 90 | #endif
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| 91 | }
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| 92 | if (o->direction == ODR_DECODE)
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| 93 | *p = odr_nullval();
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| 94 | return ber_null(o);
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| 95 | }
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