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annotate src/gpf3/ccd/s_padding_0.c @ 460:4d4f0bba9469

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doc/D-Sample written
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 19 Mar 2018 18:45:16 +0000
parents c41a534f33c6
children
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | Project : CCD
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4 | Modul : s_padding_0.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 S_PADDING_0
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18 +-----------------------------------------------------------------------------
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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 GLOBAL, 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 of ccd internal functions
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43 */
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44 #include "ccd.h"
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45
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46 /*
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47 * Declaration of coder/decoder tables
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48 */
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49 #include "ccdtable.h"
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50 #include "ccddata.h"
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51
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52 #ifndef RUN_FLASH
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53 /*
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54 +--------------------------------------------------------------------+
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55 | PROJECT : CCD MODULE : s_padding_0 |
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56 | STATE : code ROUTINE : cdc_padd_0_decode |
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57 +--------------------------------------------------------------------+
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58
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59 PURPOSE : Decoding of the GSM Type CSN1 spare padding which is
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60 preceded by a 0 bit.
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61 If that bit is read as 1 then a protocol extension is
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62 assumed by CCD.
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63 This function does not evaluate the encoded bits, since
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64 their content is irrelevant.
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65 */
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66
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67 SHORT cdc_padd_0_decode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs)
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68 {
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69 U16 cixRef;
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70 #ifdef DEBUG_CCD
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71 TRACE_CCD (globs, "cdc_padd_0_decode()");
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72 #endif
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73
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74 if (bf_readBit(globs) == 1)
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75 {
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76 ccd_recordFault (globs, ERR_PROTOCOL_EXTENSION, CONTINUE, (USHORT) e_ref, NULL);
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77 }
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78
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79 /*
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80 * Do not decode padding bits. They are not relevant.
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81 * Just adjust the position pointer in the bit stream buffer.
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82 * Either to the next octet boundary or to the message end, if necessary.
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83 */
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84 bf_incBitpos (8-(globs->bitpos & 7), globs);
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85
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86 /* First assume padding bits up to an octet boundary. In this case
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87 * message extension could be made of T, TV or TLV types.
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88 */
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89 globs->SeekTLVExt = TRUE;
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90
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91 cixRef = melem[e_ref].calcIdxRef;
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92 if (calcidx[cixRef].numPrologSteps > 0)
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93 {
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94 U16 msgEnd = (USHORT) calc[calcidx[cixRef].prologStepRef].operand * 8;
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95 if (msgEnd)
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96 {
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97 msgEnd += globs->bitoffs;
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98 msgEnd = (USHORT)MINIMUM(globs->maxBitpos, msgEnd);
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99 bf_setBitpos (msgEnd, globs);
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100 /*
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101 * Padding bytes exclude the presence of message extension.
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102 */
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103 globs->SeekTLVExt = FALSE;
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104 }
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105 }
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106 return 1;
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107 }
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108 #endif /* !RUN_FLASH */
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109
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110 #ifndef RUN_FLASH
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111 /*
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112 +--------------------------------------------------------------------+
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113 | PROJECT : CCD MODULE : s_padding_0.c |
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114 | STATE : code ROUTINE : cdc_padd_0_encode |
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115 +--------------------------------------------------------------------+
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116
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117 PURPOSE : Encoding of the GSM Type CSN1 spare padding which is
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118 preceded by a 0 bit.
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119 Supported padding values are 0x00 and 0x2B.
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120 If the first prologue step is a value msg_len, padding
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121 is done until globs->bitpos is msg_len*8.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 Otherwise until the octet boundary.
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 */
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 SHORT cdc_padd_0_encode (const ULONG c_ref, const ULONG e_ref, T_CCD_Globs *globs)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 U8 padd_bit = 0;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 U16 cixRef;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 U16 msgLen = globs->buflen;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 BOOL paddingOctets = FALSE;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 #ifdef DEBUG_CCD
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 TRACE_CCD (globs, "cdc_padd_0_encode()");
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 #endif
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 cixRef = melem[e_ref].calcIdxRef;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 * if this element is conditional, check the condition
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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 if (calcidx[cixRef].numCondCalcs NEQ 0
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 AND ! ccd_conditionOK (e_ref, globs))
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 return 1;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 if (calcidx[cixRef].numPrologSteps > 0)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 if (calc[calcidx[cixRef].prologStepRef].operation NEQ 'P')
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 ccd_setError (globs, ERR_INTERNAL_ERROR, BREAK, (USHORT) -1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 else
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 msgLen = (USHORT)(calc[calcidx[cixRef].prologStepRef].operand * 8);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152 paddingOctets = TRUE;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 * If there is some space left for spare padding, we will code them.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 * If the bit pos pointer goes beyond the message border, ccd will detect
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 * this later and bring a warning. But not here. Reason: saving room.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 */
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 if (globs->bitpos - globs->bitoffs < msgLen )
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 /*
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 * The IE should be present in the message so we code 0 bit.
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 bf_writeBit (0, globs);
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 if (melem[e_ref].elemType EQ 'S' AND spare[melem[e_ref].elemRef].bSize EQ 8)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 ULONG spareVal = spare[melem[e_ref].elemRef].value;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 /*
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 * Element is a SPARE of length 8.
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 */
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 while (globs->bitpos % 8 NEQ 0)
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 switch(spareVal)
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 case 0:
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 break;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 case 0x2B:
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 padd_bit = (UBYTE)GET_HL(0);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 break;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 default:
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 ccd_setError (globs, ERR_INTERNAL_ERROR,
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 BREAK,
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 (USHORT) (globs->bitpos),
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 (USHORT) -1);
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 bf_writeBit (padd_bit, globs);
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 /* Write spare padding octets. */
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 if (paddingOctets)
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195 while (globs->bitpos - globs->bitoffs < msgLen )
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 bf_codeLongNumber (8, spareVal, globs);
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
199 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 else
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 {
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 ccd_setError (globs, ERR_INVALID_TYPE,
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 BREAK,
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 (USHORT) (globs->bitpos),
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 (USHORT) -1);
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
208 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 }
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 return 1;
c41a534f33c6 src/gpf3: preened GPF goo from TCS3.2
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 #endif /* !RUN_FLASH */