|
1 /* |
|
2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of the License "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: |
|
15 * Note: This file may contain code to generate corrupt files for test purposes. |
|
16 * Such code is excluded from production builds by use of compiler defines; |
|
17 * it is recommended that such code should be removed if this code is ever published publicly. |
|
18 * |
|
19 */ |
|
20 |
|
21 |
|
22 /** |
|
23 @file |
|
24 @internalComponent |
|
25 @released |
|
26 */ |
|
27 |
|
28 |
|
29 #include "fieldroot.h" |
|
30 #include "basefile.h" |
|
31 |
|
32 |
|
33 |
|
34 #include <assert.h> // for assert |
|
35 #include "utility_interface.h" |
|
36 |
|
37 |
|
38 CSISFieldRoot::TDbgFlag CSISFieldRoot::iDbgFlag (CSISFieldRoot::EDbgDefault); |
|
39 CSISFieldRoot::THeadOpt CSISFieldRoot::iOptions (CSISFieldRoot::EOptDefault); |
|
40 #ifdef GENERATE_ERRORS |
|
41 CSISFieldRoot::TBug CSISFieldRoot::iBug (CSISFieldRoot::EBugDefault); |
|
42 unsigned CSISFieldRoot::iBugStart (10); |
|
43 unsigned CSISFieldRoot::iBugRepeat (10); |
|
44 unsigned CSISFieldRoot::iBugRepeatCountdown (0); |
|
45 #endif // GENERATE_ERRORS |
|
46 |
|
47 |
|
48 |
|
49 // 16-bit CRC calulation lookup table |
|
50 static const WORD gCrcTab [256] = |
|
51 {0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,0x8108,0x9129,0xa14a, |
|
52 0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294, |
|
53 0x72f7,0x62d6,0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,0x2462, |
|
54 0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,0xa56a,0xb54b,0x8528,0x9509, |
|
55 0xe5ee,0xf5cf,0xc5ac,0xd58d,0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695, |
|
56 0x46b4,0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,0x48c4,0x58e5, |
|
57 0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948, |
|
58 0x9969,0xa90a,0xb92b,0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12, |
|
59 0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,0x6ca6,0x7c87,0x4ce4, |
|
60 0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b, |
|
61 0x8d68,0x9d49,0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,0xff9f, |
|
62 0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,0x9188,0x81a9,0xb1ca,0xa1eb, |
|
63 0xd10c,0xc12d,0xf14e,0xe16f,0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046, |
|
64 0x6067,0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,0x02b1,0x1290, |
|
65 0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e, |
|
66 0xe54f,0xd52c,0xc50d,0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405, |
|
67 0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,0x26d3,0x36f2,0x0691, |
|
68 0x16b0,0x6657,0x7676,0x4615,0x5634,0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9, |
|
69 0xb98a,0xa9ab,0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,0xcb7d, |
|
70 0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,0x4a75,0x5a54,0x6a37,0x7a16, |
|
71 0x0af1,0x1ad0,0x2ab3,0x3a92,0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8, |
|
72 0x8dc9,0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,0xef1f,0xff3e, |
|
73 0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,0x6e17,0x7e36,0x4e55,0x5e74,0x2e93, |
|
74 0x3eb2,0x0ed1,0x1ef0 |
|
75 }; |
|
76 |
|
77 |
|
78 const TUint8 KByteAlignment = 4; |
|
79 |
|
80 CSISFieldRoot::CSISFieldRoot () |
|
81 { |
|
82 } |
|
83 |
|
84 |
|
85 void CSISFieldRoot::DoPaddedCrc(TCRC& aCRC, const TUint8* aData, const unsigned aLen) |
|
86 { |
|
87 // calculate CRC of the data as normal |
|
88 CSISFieldRoot::DoTheCrc(aCRC, aData, aLen); |
|
89 |
|
90 // do CRC of the padding |
|
91 CSISFieldRoot::PaddingCrc(aCRC, aLen); |
|
92 } |
|
93 |
|
94 void CSISFieldRoot::PaddingCrc(TCRC& aCRC, const unsigned aLength) |
|
95 { |
|
96 // calculate the CRC of any required padding bytes |
|
97 TUint8 padding[KByteAlignment] = { 0, 0, 0, 0}; |
|
98 CSISFieldRoot::DoTheCrc(aCRC, padding, (KByteAlignment - (aLength % KByteAlignment)) & 0x03); |
|
99 } |
|
100 |
|
101 void CSISFieldRoot::DoTheCrc (TCRC& aCRC, const TUint8* aData, const unsigned aLen) |
|
102 { |
|
103 |
|
104 // There are several flavours of CRC16. This function calculates the CRC using the ZModem CRC-16 |
|
105 // The parameters used to describe the ZModem CRC16 are: |
|
106 // Poly: 1021 |
|
107 // Initial Value: 0000 |
|
108 // Reflected Input: No |
|
109 // Reflected Output: No |
|
110 // XorOutput: 0000 |
|
111 |
|
112 /* |
|
113 |
|
114 This is a test vector "123456789" which returns CRC of 0x31c3 |
|
115 |
|
116 TUint8 test[] = { 0x31, 0x32, 0x33, 0x34, 0x35,0x36, 0x37, 0x38, 0x39 }; |
|
117 unsigned length = 9; |
|
118 for (const TUint8 *ptrdata = test; ptrdata != test + length; ptrdata++) |
|
119 aCRC = (aCRC << 8) ^ gCrcTab[((aCRC >> 8) ^ *ptrdata) & 0xff]; |
|
120 */ |
|
121 |
|
122 /* USEFUL CRC DEBUGGING TRICK |
|
123 FILE* ptr = NULL; |
|
124 ptr = fopen("c:\\crc.dat","ab"); |
|
125 fwrite(aData, 1, aLen, ptr); |
|
126 fclose(ptr); |
|
127 */ |
|
128 assert (! IsBadReadPtr (aData, aLen)); |
|
129 |
|
130 for (const TUint8 *ptrdata = aData; ptrdata != aData + aLen; ptrdata++) |
|
131 { |
|
132 aCRC = (aCRC << 8) ^ gCrcTab[((aCRC >> 8) ^ *ptrdata) & 0xff]; |
|
133 } |
|
134 } |
|
135 |
|
136 |
|
137 TSISStream& operator >> (TSISStream& aFile, CSISFieldRoot::TFieldType& aType) |
|
138 { |
|
139 TUint32 value; |
|
140 aFile >> value; |
|
141 aType = static_cast <CSISFieldRoot::TFieldType> (value); |
|
142 return aFile; |
|
143 } |
|
144 |
|
145 TSISStream& operator << (TSISStream& aFile, const CSISFieldRoot::TFieldType aType) |
|
146 { |
|
147 TUint32 value (static_cast <TUint32> (aType)); |
|
148 aFile << value; |
|
149 return aFile; |
|
150 } |
|
151 |
|
152 |
|
153 |
|
154 |
|
155 |
|
156 |
|
157 CSISFieldRoot::~CSISFieldRoot () |
|
158 { |
|
159 } |
|
160 |
|
161 |
|
162 TCRC CSISFieldRoot::Crc (const bool aIsArrayElement) const |
|
163 { |
|
164 TCRC crc (0); |
|
165 CalculateCrc (crc, aIsArrayElement); |
|
166 return crc; |
|
167 } |
|
168 |
|
169 #ifdef GENERATE_ERRORS |
|
170 void CSISFieldRoot::AddRawDataValue (TSISStream& aFile,const unsigned aLength) |
|
171 { |
|
172 for(int i=0 ; i < aLength ;i++) |
|
173 { |
|
174 aFile << (TUint8) rand(); |
|
175 } |
|
176 } |
|
177 #endif // GENERATE_ERRORS |
|
178 |
|
179 #ifdef GENERATE_ERRORS |
|
180 bool CSISFieldRoot::IsBugToBeCreated (const TBug aBug) |
|
181 { |
|
182 if (IsBugSet (aBug)) |
|
183 { |
|
184 if (iBugStart > 0) |
|
185 { |
|
186 return (--iBugStart == 0); |
|
187 } |
|
188 if (--iBugRepeatCountdown == 0) |
|
189 { |
|
190 iBugRepeatCountdown = iBugRepeat; |
|
191 return true; |
|
192 } |
|
193 } |
|
194 return false; |
|
195 } |
|
196 #endif // GENERATE_ERRORS |