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annotate src/gpf3/ccd/asn1_choice.c @ 519:838eeafb0051

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author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 22 Jul 2018 07:41:05 +0000
parents c41a534f33c6
children
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2
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project :
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4 | Modul : asn1_choice.c
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5 +-----------------------------------------------------------------------------
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6 | Copyright 2002 Texas Instruments Berlin, AG
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7 | All rights reserved.
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8 |
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9 | This file is confidential and a trade secret of Texas
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10 | Instruments Berlin, AG
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11 | The receipt of or possession of this file does not convey
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12 | any rights to reproduce or disclose its contents or to
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13 | manufacture, use, or sell anything it may describe, in
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14 | whole, or in part, without the specific written consent of
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15 | Texas Instruments Berlin, AG.
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16 +-----------------------------------------------------------------------------
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17 | Purpose : Definition of encoding and decoding functions for ASN1_CHOICE
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18 | elements
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19 +-----------------------------------------------------------------------------
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20 */
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21
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22 /*
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23 * Standard definitions like UCHAR, ERROR etc.
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24 */
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25 #include "typedefs.h"
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26 #include "header.h"
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27
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28 /*
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29 * Prototypes of ccd (USE_DRIVER EQ undef) for prototypes only
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30 * look at ccdapi.h
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31 */
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32 #undef USE_DRIVER
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33 #include "ccdapi.h"
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34
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35 /*
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36 * Types and functions for bit access and manipulation
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37 */
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38 #include "ccd_globs.h"
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39 #include "bitfun.h"
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40
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41 /*
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42 * Prototypes and constants in the common part of ccd
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43 */
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44 #include "ccd.h"
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45 #include "ccd_codingtypes.h"
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46
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47 /*
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48 * Declaration of coder/decoder tables
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49 */
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50 #include "ccdtable.h"
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51 #include "ccddata.h"
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52
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53 EXTERN T_FUNC_POINTER codec[MAX_CODEC_ID+1][2];
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54
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55 #ifndef RUN_INT_RAM
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56 const UBYTE bitSize[] = {0, 1, 1, 2, 2, 3, 3, 3, 3,
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57 4, 4, 4, 4, 4, 4, 4, 4,
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58 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
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59 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
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60 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6};
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61 #endif /* !RUN_INT_RAM */
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62
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63 #ifndef RUN_INT_RAM
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64 /*
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65 +--------------------------------------------------------------------+
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66 | PROJECT : CCD (6144) MODULE : asn1_choice |
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67 | STATE : code ROUTINE : PER_Decode_ASN1_CHOICE_altervative |
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68 +--------------------------------------------------------------------+
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69
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70 PURPOSE : Decode a chosen alternative of an ASN.1 CHOICE type
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71 Use the parameter union tag bit-size to read the CHOICE
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72 index. Because of the ascending enumeration of union tags
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73 it is easy to calculate the e_ref for the chosen element
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74 which is to be decoded. Then the appropriate decoding
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75 function for the chosen element is called.
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76
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77 No actions for pointer types (dynamic arrays), as CHOICE
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78 clauses contain no information in themselves. Memory is
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79 allocated in the containing SEQUENCE instead.
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80 */
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81 void PER_Decode_ASN1_CHOICE_alterative (const ULONG e_ref, T_ENUM UnionTag, T_CCD_Globs *globs)
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82 {
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83 UBYTE *old_pstruct;
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84 ULONG elem_ref, c_ref;
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85
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86 c_ref = (ULONG) melem[e_ref].elemRef;
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87
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88 /*
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89 * Calculate the elem_ref for the chosen element.
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90 * Write the CHOICE tag value in the C-structure.
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91 */
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92 elem_ref = mcomp[c_ref].componentRef + (ULONG) UnionTag;
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93 *(T_ENUM *) (globs->pstruct+globs->pstructOffs) = (T_ENUM) UnionTag;
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94
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95 /*
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96 * Prepare for decoding next element.
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97 * Store the current value of the C-structure pointer. After decoding the CHOICE component
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98 * we will set the pointer to this stored value. Then we will use pstructOffs for pointing
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99 * to the next element.
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100 */
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101 old_pstruct = globs->pstruct;
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102 globs->pstruct += (globs->pstructOffs + sizeof(T_ENUM));
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103
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104 #ifdef DYNAMIC_ARRAYS
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105 /*
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106 * Allocate memory for this whole composition, if elemType is
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107 * one of the pointer types.
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108 */
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109 if ( is_pointer_type(e_ref) AND
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110 PER_allocmem_and_update(e_ref, 1, globs) NEQ ccdOK ) {
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111 return;
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112 } else
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113 #endif
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114
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115 /*
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116 * Call the decode function for the chosen element.
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117 */
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118 (void) codec[melem[elem_ref].codingType][DECODE_FUN]
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119 (c_ref, elem_ref, globs);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 * Prepare for decoding the next element.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 globs->pstruct = old_pstruct;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 #endif /* !RUN_INT_RAM */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 #ifndef RUN_INT_RAM
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 +--------------------------------------------------------------------+
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parents:
diff changeset
130 | PROJECT : CCD (6144) MODULE : asn1_choice |
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parents:
diff changeset
131 | STATE : code ROUTINE : cdc_asn1_choice_decode |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 +--------------------------------------------------------------------+
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 PURPOSE : Decode ASN.1 CHOICE type according to PER
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 CHOICE index is read from the message bit string. Its
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 bit-size can be extracted from the number of CHOICE
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 alternatives.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 For decoding the CHOICE alternative itself, call the same
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 function as for extensible CHOICE types.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 SHORT cdc_asn1_choice_decode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 T_ENUM UnionTag=0; /* default: only one alternative */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 ULONG num_of_comps, mcomp_ref;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 mcomp_ref = (ULONG) melem[e_ref].elemRef;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 #ifdef DEBUG_CCD
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 #ifndef CCD_SYMBOLS
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 TRACE_CCD (globs, "cdc_asn1_choice_decode()");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 #else
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 TRACE_CCD (globs, "cdc_asn1_choice_decode() %s", mcomp[mcomp_ref].name);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 #endif
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 #endif
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 /* Don't do anything for empty choices */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if (mcomp[mcomp_ref].numOfComponents == 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 return 1;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 globs->pstructOffs = melem[e_ref].structOffs;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 /* For optional elements we have already set the valid flag in the
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 * C-structure. We have done it while processing ASN1_SEQ.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 if ( ! cdc_isPresent(e_ref, globs) ) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 return 1;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 * Get the bit size of the CHOICE index.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 * Then read the bits representing the index in the air message.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 num_of_comps = (ULONG) mcomp[mcomp_ref].numOfComponents;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 /* CHOICE index is encoded only if there are more than one alternatives. */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 if (num_of_comps NEQ 1)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 UnionTag = bf_getBits ((U32)bitSize[num_of_comps], globs);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 * Check correctness of the read CHOICE index.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 if ((ULONG)UnionTag >= num_of_comps)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 ccd_recordFault (globs, ERR_ASN1_ENCODING, BREAK, (USHORT) e_ref, globs->pstruct+globs->pstructOffs);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 PER_Decode_ASN1_CHOICE_alterative (e_ref, UnionTag, globs);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 return 1;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 #endif /* !RUN_INT_RAM */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 #ifndef RUN_INT_RAM
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 +--------------------------------------------------------------------+
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 | PROJECT : CCD (6144) MODULE : asn1_choice |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 | STATE : code ROUTINE : PER_Encode_ASN1_CHOICE_altervative |
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 +--------------------------------------------------------------------+
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 PURPOSE : Encode a chosen alternative of an ASN.1 CHOICE type.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 Because of ascending enumeration of union tags it is
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 easy to calculate the e_ref for the chosen element to be
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 encoded. Then the appropriate encoding function for the
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 chosen element is called.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 No actions for pointer types (dynamic arrays), as CHOICE
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 clauses contain no information in themselves. Memory is
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 allocated in the containing SEQUENCE instead.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 void PER_Encode_ASN1_CHOICE_alterative (const ULONG e_ref, T_ENUM UnionTag, T_CCD_Globs *globs)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 UBYTE *old_pstruct;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 ULONG elem_ref, c_ref;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216 c_ref = (ULONG) melem[e_ref].elemRef;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
219 * Prepare for encoding next element.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 * Store the current value of the C-structure pointer. After encoding
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 * the CHOICE component we will set the pointer to this stored value.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
222 * Then we will use pstructOffs for pointing to the next element.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224 old_pstruct = globs->pstruct;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
225 globs->pstruct += (globs->pstructOffs + sizeof(T_ENUM));
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
226
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 #ifdef DYNAMIC_ARRAYS
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 * Dereference pointer if this is a pointer types (dynamic arrays)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
230 * globs->pstruct was saved above, so no need to do it again.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
231 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
232 if ( is_pointer_type(e_ref) ) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 if (ccd_check_pointer(*(U8 **)(globs->pstruct)) == ccdOK)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
234 globs->pstruct = *(U8 **)(globs->pstruct);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
235 else {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
236 ccd_recordFault (globs, ERR_INVALID_PTR, BREAK, (USHORT) e_ref,
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
237 &globs->pstruct[globs->pstructOffs]);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
238 return;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
239 }
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240 }
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241 #endif
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242
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243 elem_ref = mcomp[c_ref].componentRef + (USHORT) UnionTag;
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244
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245 /*
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246 * Call the decode function for the chosen element.
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247 */
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248 (void) codec[melem[elem_ref].codingType][ENCODE_FUN]
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249 (c_ref, elem_ref, globs);
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250 /*
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251 * Prepare for encoding the next element.
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252 */
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253 globs->pstruct = old_pstruct;
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254 }
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255 #endif /* !RUN_INT_RAM */
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256
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257 #ifndef RUN_INT_RAM
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258 /*
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259 +--------------------------------------------------------------------+
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260 | PROJECT : CCD (6144) MODULE : asn1_choice |
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261 | STATE : code ROUTINE : cdc_asn1_choice_encode |
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262 +--------------------------------------------------------------------+
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263
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264 PURPOSE : Encoding of CHOICE type for UMTS
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265 The size of the union tag must be calculated. Then its value
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266 is written in the air message.
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267 For encoding the CHOICE alternative itself, call the same
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268 function as for extensible CHOICE types.
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269 */
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270 SHORT cdc_asn1_choice_encode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs)
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271 {
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272 T_ENUM UnionTag=0; /* default: only one alternative */
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273 ULONG num_of_comps, mcomp_ref;
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274
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275 mcomp_ref = (ULONG) melem[e_ref].elemRef;
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276
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277 #ifdef DEBUG_CCD
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278 #ifndef CCD_SYMBOLS
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279 TRACE_CCD (globs, "cdc_asn1_choice_encode()");
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280 #else
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281 TRACE_CCD (globs, "cdc_asn1_choice_encode() %s", mcomp[mcomp_ref].name);
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282 #endif
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283 #endif
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284
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285 /* Don't do anything for empty choices */
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286 if (mcomp[mcomp_ref].numOfComponents == 0)
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parents:
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287 {
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288 return 1;
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parents:
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289 }
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290
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291 globs->pstructOffs = melem[e_ref].structOffs;
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292
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293 /* For optional elements we have already set the valid flag in the
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294 * C-structure. We have done it while processing ASN1_SEQ.
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295 */
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296 if ( ! cdc_isPresent(e_ref, globs) )
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297 return 1;
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parents:
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298
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299 /*
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300 * Get the value of CHOICE index (= union controller) from the C-structure.
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301 * Check its correctness. Write it in the air message.
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302 * Afterwards encode the chosen CHOICE altervative.
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303 */
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304 num_of_comps = mcomp[mcomp_ref].numOfComponents;
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parents:
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305 /* CHOICE index is encoded only if there are more than one alternatives. */
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parents:
diff changeset
306 if (num_of_comps NEQ 1)
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parents:
diff changeset
307 {
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parents:
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308 UnionTag = *(T_ENUM *) (globs->pstruct+globs->pstructOffs);
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parents:
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309 if (UnionTag >= (T_ENUM)num_of_comps)
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parents:
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310 {
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311 ccd_recordFault (globs, ERR_ASN1_ENCODING, BREAK, (USHORT) e_ref,
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parents:
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312 globs->pstruct+globs->pstructOffs);
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parents:
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313 }
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parents:
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314 bf_writeVal ((ULONG) UnionTag, (ULONG) bitSize[num_of_comps], globs);
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parents:
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315 }
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316 PER_Encode_ASN1_CHOICE_alterative (e_ref, UnionTag, globs);
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parents:
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317
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318 return 1;
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parents:
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319 }
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parents:
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320 #endif /* !RUN_INT_RAM */