| 1 | // %pacpus:license{
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| 2 | // This file is part of the PACPUS framework distributed under the
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| 3 | // CECILL-C License, Version 1.0.
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| 4 | // %pacpus:license}
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| 5 | /// @file
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| 6 | /// @author Gerald Dherbomez <firstname.surname@utc.fr>
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| 7 | /// @date July, 2008
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| 8 | /// @version $Id: BinaryDecoder.h 76 2013-01-10 17:05:10Z kurdejma $
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| 9 | /// @copyright Copyright (c) UTC/CNRS Heudiasyc 2006 - 2013. All rights reserved.
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| 10 | /// @brief Extracts data of specified type in a string.
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| 11 | ///
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| 12 | /// Purpose: Extract data of specified type in a string (char *)
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| 13 | /// Usage:
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| 14 | /// bool xDecodeToXXX(T* result, const char * data, const unsigned int startBit, const unsigned int length)
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| 15 | /// => x = format (i:Intel, Little Endian)
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| 16 | /// (m:Motorola, Big Endian)
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| 17 | /// => XXX = type of return value
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| 18 | /// (Bool = bool)
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| 19 | /// (I8 = char - 8 bits)
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| 20 | /// (UI8 = unsigned char - 8 bits)
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| 21 | /// (I16 = short - 16 bits)
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| 22 | /// (UI16 = unsigned short - 16 bits)
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| 23 | /// (I32 = long - 32 bits)
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| 24 | /// (UI32 = unsigned long - 32 bits)
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| 25 | /// (I64 = long long - 64 bits)
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| 26 | /// (UI16 = unisgned long long - 64 bits)
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| 27 | ///
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| 28 | /// ex: inline bool mDecodeToUI16(r, str, 8, 12);
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| 29 |
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| 30 | #ifndef BINARYDECODER_H
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| 31 | #define BINARYDECODER_H
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| 32 |
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| 33 | #ifdef __cplusplus
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| 34 | extern "C"
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| 35 | {
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| 36 | #endif // __cplusplus
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| 37 |
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| 38 | #include "PacpusToolsConfig.h"
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| 39 |
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| 40 | #include <stdio.h>
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| 41 |
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| 42 | //////////////////////////////////////////////////////////////////////////
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| 43 | // print the data in the hexadecimal format in the console
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| 44 | inline void displayData(const unsigned char * data, const unsigned long length, const int id)
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| 45 | {
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| 46 | printf("\ndata = ");
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| 47 | for (unsigned int i = 0;i< length;++i )
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| 48 | printf("%02x ",data[i]);
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| 49 | printf(" dlc = %ld ID = 0x%x\n", length, id);
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| 50 | }
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| 51 |
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| 52 | //////////////////////////////////////////////////////////////////////////
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| 53 | // for Big Endian - Motorola coding
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| 54 | //------------------------------------------------------------------------
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| 55 | // return true if the signal is spread on more than 1 byte
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| 56 | // ie if length is greater than ((startBit%8) + 1)
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| 57 | // example:
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| 58 | // 7654 3210
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| 59 | // 0 .... ..||
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| 60 | // 1 |||| ....
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| 61 | // startBit is 1 and the length is 8: result gives (1%8)+1 = 2 < length(=6)
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| 62 | inline bool mSpreadOnMoreThan1Byte(const unsigned int startBit, const unsigned int length)
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| 63 | {
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| 64 | if ( (length > (startBit & 0x07) + 1) ) {
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| 65 | return true;
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| 66 | } else {
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| 67 | return false;
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | //////////////////////////////////////////////////////////////////////////
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| 72 | // for Little Endian - Intel coding
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| 73 | //------------------------------------------------------------------------
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| 74 | // return true if the signal is spread on more than 1 byte
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| 75 | // ie if length is greater than 8-(startBit%8)
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| 76 | // example:
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| 77 | // 7654 3210
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| 78 | // 0 ||.. ....
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| 79 | // 1 .... ||||
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| 80 | // startBit is 6 and the length is 6: result gives 8-((6%8)) = 2 < length(=6)
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| 81 | inline bool iSpreadOnMoreThan1Byte(const unsigned int startBit, const unsigned int length)
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| 82 | {
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| 83 | if ( length > 8 - (startBit & 0x07) ) {
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| 84 | return true;
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| 85 | } else {
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| 86 | return false;
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| 87 | }
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| 88 | }
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| 89 |
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| 90 | //////////////////////////////////////////////////////////////////////////
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| 91 | // for Big Endian - Motorola coding
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| 92 | //------------------------------------------------------------------------
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| 93 | // return true if the signal is spread on more than 2 bytes
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| 94 | // ie if (length - ((startBit%8) + 1) is greater than 8
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| 95 | // example:
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| 96 | // 7654 3210
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| 97 | // 0 .... ...|
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| 98 | // 1 |||| ||||
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| 99 | // 2 ||.. ....
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| 100 | // the start bit is 0 and the length is 11: result gives 11 - (0%8+1) = 10 (>8)
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| 101 | //////////////////////////////////////////////////////////////////////////
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| 102 | inline bool mSpreadOnMoreThan2Bytes(const unsigned int startBit, const unsigned int length)
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| 103 | {
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| 104 | if ( length - ((startBit & 0x07) + 1) > 8 )
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| 105 | return true;
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| 106 | else
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| 107 | return false;
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| 108 | }
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| 109 |
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| 110 | //////////////////////////////////////////////////////////////////////////
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| 111 | // for Little Endian - Intel coding
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| 112 | //------------------------------------------------------------------------
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| 113 | // return true if the signal is spread on more than 2 bytes
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| 114 | // ie if (length - (8 - startBit)) is greater than 8
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| 115 | // example:
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| 116 | // 7654 3210
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| 117 | // 0 |... ....
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| 118 | // 1 |||| ||||
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| 119 | // 2 .... ..||
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| 120 | // the start bit is 7 and the length is 11: result gives 11 - (8 - 7) = 10 (>8)
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| 121 | //////////////////////////////////////////////////////////////////////////
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| 122 | inline bool iSpreadOnMoreThan2Bytes(const unsigned int startBit, const unsigned int length)
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| 123 | {
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| 124 | if ( length - (8 - (startBit & 0x07)) > 8 )
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| 125 | return true;
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| 126 | else
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| 127 | return false;
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| 128 | }
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| 129 |
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| 130 | //////////////////////////////////////////////////////////////////////////
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| 131 | // for Big Endian - Motorola coding
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| 132 | //------------------------------------------------------------------------
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| 133 | // return true if the signal is spread on more than 4 bytes
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| 134 | // ie if length is greater than ((startBit%8) + 1)
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| 135 | // example:
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| 136 | // 7654 3210
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| 137 | // 0 .... ..||
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| 138 | // 1 |||| ||||
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| 139 | // 2 |||| ||||
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| 140 | // 3 |||| ||||
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| 141 | // 4 |||. ....
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| 142 | // startBit is 1 and the length is 29: result gives 29 - ((1%8)+1) = 27 (> 24)
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| 143 | inline bool mSpreadOnMoreThan4Bytes(const unsigned int startBit, const unsigned int length)
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| 144 | {
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| 145 | return (3*8) < (length - ((startBit & 0x07) + 1));
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| 146 | }
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| 147 |
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| 148 | //////////////////////////////////////////////////////////////////////////
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| 149 | // for Little Endian - Intel coding
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| 150 | //------------------------------------------------------------------------
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| 151 | // return true if the signal is spread on more than 4 bytes
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| 152 | // ie if length is greater than 8-(startBit%8)
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| 153 | // example:
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| 154 | // 7654 3210
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| 155 | // 0 ||.. ....
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| 156 | // 1 |||| ||||
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| 157 | // 2 |||| ||||
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| 158 | // 3 |||| ||||
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| 159 | // 4 .... ..||
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| 160 | // startBit is 6 and the length is 28: result gives 28 - (8-((6%8))) = 26 (>24)
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| 161 | inline bool iSpreadOnMoreThan4Bytes(const unsigned int startBit, const unsigned int length)
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| 162 | {
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| 163 | return (3*8) < (length - (8 - (startBit & 0x07)));
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| 164 | }
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| 165 |
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| 166 | //////////////////////////////////////////////////////////////////////////
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| 167 | // return a 8-bits shifted-left mask corresponding to the length parameter
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| 168 | // ex: shift = 2 and length = 3
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| 169 | // mask will be 0b00011100
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| 170 | inline unsigned char getShiftMask8(const unsigned int shift, const unsigned int length)
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| 171 | {
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| 172 | unsigned char mask;
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| 173 | switch (length)
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| 174 | {
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| 175 | case 1: mask = 0x01; break;
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| 176 | case 2: mask = 0x03; break;
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| 177 | case 3: mask = 0x07; break;
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| 178 | case 4: mask = 0x0F; break;
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| 179 | case 5: mask = 0x1F; break;
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| 180 | case 6: mask = 0x3F; break;
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| 181 | case 7: mask = 0x7F; break;
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| 182 | case 8: mask = 0xFF; break;
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| 183 | default: mask = 0; break;
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| 184 | }
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| 185 | return mask << shift;
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| 186 | }
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| 187 |
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| 188 | //////////////////////////////////////////////////////////////////////////
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| 189 | // return a 8-bits mask corresponding to the length parameter with bit order decreasing
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| 190 | // ex: startBit = 2 and length = 3
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| 191 | // mask will be 0b00000111
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| 192 | inline unsigned char getMask8( const unsigned int length )
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| 193 | {
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| 194 | unsigned char mask;
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| 195 | switch (length) {
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| 196 | case 1: mask = 0x01; break;
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| 197 | case 2: mask = 0x03; break;
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| 198 | case 3: mask = 0x07; break;
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| 199 | case 4: mask = 0x0F; break;
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| 200 | case 5: mask = 0x1F; break;
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| 201 | case 6: mask = 0x3F; break;
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| 202 | case 7: mask = 0x7F; break;
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| 203 | case 8: mask = 0xFF; break;
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| 204 | default: mask = 0; break;
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| 205 | }
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| 206 | return mask;
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| 207 | }
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| 208 |
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| 209 | //////////////////////////////////////////////////////////////////////////
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| 210 | // return a 16-bits shifted-left mask corresponding to the length parameter
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| 211 | inline unsigned short getShiftMask16(const unsigned int shift, const unsigned int length)
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| 212 | {
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| 213 | unsigned short mask;
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| 214 | switch (length) {
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| 215 | case 1: mask = 0x0001; break;
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| 216 | case 2: mask = 0x0003; break;
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| 217 | case 3: mask = 0x0007; break;
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| 218 | case 4: mask = 0x000F; break;
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| 219 | case 5: mask = 0x001F; break;
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| 220 | case 6: mask = 0x003F; break;
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| 221 | case 7: mask = 0x007F; break;
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| 222 | case 8: mask = 0x00FF; break;
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| 223 | case 9: mask = 0x01FF; break;
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| 224 | case 10: mask = 0x03FF; break;
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| 225 | case 11: mask = 0x07FF; break;
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| 226 | case 12: mask = 0x0FFF; break;
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| 227 | case 13: mask = 0x1FFF; break;
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| 228 | case 14: mask = 0x3FFF; break;
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| 229 | case 15: mask = 0x7FFF; break;
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| 230 | case 16: mask = 0xFFFF; break;
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| 231 | default: mask = 0; break;
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| 232 | }
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| 233 | return mask << shift;
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| 234 | }
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| 235 |
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| 236 | //////////////////////////////////////////////////////////////////////////
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| 237 | // return a 16-bits mask corresponding to the length parameter with bit order decreasing
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| 238 | inline unsigned short getMask16( const unsigned int length )
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| 239 | {
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| 240 | unsigned short mask;
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| 241 | switch (length) {
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| 242 | case 1: mask = 0x0001; break;
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| 243 | case 2: mask = 0x0003; break;
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| 244 | case 3: mask = 0x0007; break;
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| 245 | case 4: mask = 0x000F; break;
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| 246 | case 5: mask = 0x001F; break;
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| 247 | case 6: mask = 0x003F; break;
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| 248 | case 7: mask = 0x007F; break;
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| 249 | case 8: mask = 0x00FF; break;
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| 250 | case 9: mask = 0x01FF; break;
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| 251 | case 10: mask = 0x03FF; break;
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| 252 | case 11: mask = 0x07FF; break;
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| 253 | case 12: mask = 0x0FFF; break;
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| 254 | case 13: mask = 0x1FFF; break;
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| 255 | case 14: mask = 0x3FFF; break;
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| 256 | case 15: mask = 0x7FFF; break;
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| 257 | case 16: mask = 0xFFFF; break;
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| 258 | default: mask = 0; break;
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| 259 | }
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| 260 | return mask;
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| 261 | }
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| 262 |
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| 263 | //////////////////////////////////////////////////////////////////////////
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| 264 | // return a 32-bits shifted-left mask corresponding to the length parameter
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| 265 | inline unsigned long getShiftMask32(const unsigned int shift, const unsigned int length)
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| 266 | {
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| 267 | unsigned long mask;
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| 268 | switch (length) {
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| 269 | case 1: mask = 0x00000001; break;
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| 270 | case 2: mask = 0x00000003; break;
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| 271 | case 3: mask = 0x00000007; break;
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| 272 | case 4: mask = 0x0000000F; break;
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| 273 | case 5: mask = 0x0000001F; break;
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| 274 | case 6: mask = 0x0000003F; break;
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| 275 | case 7: mask = 0x0000007F; break;
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| 276 | case 8: mask = 0x000000FF; break;
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| 277 | case 9: mask = 0x000001FF; break;
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| 278 | case 10: mask = 0x000003FF; break;
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| 279 | case 11: mask = 0x000007FF; break;
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| 280 | case 12: mask = 0x00000FFF; break;
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| 281 | case 13: mask = 0x00001FFF; break;
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| 282 | case 14: mask = 0x00003FFF; break;
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| 283 | case 15: mask = 0x00007FFF; break;
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| 284 | case 16: mask = 0x0000FFFF; break;
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| 285 | case 17: mask = 0x0001FFFF; break;
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| 286 | case 18: mask = 0x0003FFFF; break;
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| 287 | case 19: mask = 0x0007FFFF; break;
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| 288 | case 20: mask = 0x000FFFFF; break;
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| 289 | case 21: mask = 0x001FFFFF; break;
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| 290 | case 22: mask = 0x003FFFFF; break;
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| 291 | case 23: mask = 0x007FFFFF; break;
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| 292 | case 24: mask = 0x00FFFFFF; break;
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| 293 | case 25: mask = 0x01FFFFFF; break;
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| 294 | case 26: mask = 0x03FFFFFF; break;
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| 295 | case 27: mask = 0x07FFFFFF; break;
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| 296 | case 28: mask = 0x0FFFFFFF; break;
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| 297 | case 29: mask = 0x1FFFFFFF; break;
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| 298 | case 30: mask = 0x3FFFFFFF; break;
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| 299 | case 31: mask = 0x7FFFFFFF; break;
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| 300 | case 32: mask = 0xFFFFFFFF; break;
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| 301 | default: mask = 0; break;
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| 302 | }
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| 303 | return mask << shift;
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| 304 | }
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| 305 |
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| 306 | //////////////////////////////////////////////////////////////////////////
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| 307 | // return a 32-bits mask corresponding to the length parameter with bit order decreasing
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| 308 | inline unsigned long getMask32( const unsigned int length )
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| 309 | {
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| 310 | unsigned long mask;
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| 311 | switch (length) {
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| 312 | case 1: mask = 0x00000001; break;
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| 313 | case 2: mask = 0x00000003; break;
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| 314 | case 3: mask = 0x00000007; break;
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| 315 | case 4: mask = 0x0000000F; break;
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| 316 | case 5: mask = 0x0000001F; break;
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| 317 | case 6: mask = 0x0000003F; break;
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| 318 | case 7: mask = 0x0000007F; break;
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| 319 | case 8: mask = 0x000000FF; break;
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| 320 | case 9: mask = 0x000001FF; break;
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| 321 | case 10: mask = 0x000003FF; break;
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| 322 | case 11: mask = 0x000007FF; break;
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| 323 | case 12: mask = 0x00000FFF; break;
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| 324 | case 13: mask = 0x00001FFF; break;
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| 325 | case 14: mask = 0x00003FFF; break;
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| 326 | case 15: mask = 0x00007FFF; break;
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| 327 | case 16: mask = 0x0000FFFF; break;
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| 328 | case 17: mask = 0x0001FFFF; break;
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| 329 | case 18: mask = 0x0003FFFF; break;
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| 330 | case 19: mask = 0x0007FFFF; break;
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| 331 | case 20: mask = 0x000FFFFF; break;
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| 332 | case 21: mask = 0x001FFFFF; break;
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| 333 | case 22: mask = 0x003FFFFF; break;
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| 334 | case 23: mask = 0x007FFFFF; break;
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| 335 | case 24: mask = 0x00FFFFFF; break;
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| 336 | case 25: mask = 0x01FFFFFF; break;
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| 337 | case 26: mask = 0x03FFFFFF; break;
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| 338 | case 27: mask = 0x07FFFFFF; break;
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| 339 | case 28: mask = 0x0FFFFFFF; break;
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| 340 | case 29: mask = 0x1FFFFFFF; break;
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| 341 | case 30: mask = 0x3FFFFFFF; break;
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| 342 | case 31: mask = 0x7FFFFFFF; break;
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| 343 | case 32: mask = 0xFFFFFFFF; break;
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| 344 | default: mask = 0; break;
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| 345 | }
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| 346 | return mask;
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| 347 | }
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| 348 |
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| 349 | //////////////////////////////////////////////////////////////////////////
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| 350 | // return a 64-bits mask corresponding to the length parameter with bit order decreasing
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| 351 | inline unsigned long long getMask64( const unsigned int length )
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| 352 | {
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| 353 | unsigned long long mask;
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| 354 | switch (length) {
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| 355 | case 1: mask = 0x0000000000000001ULL; break;
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| 356 | case 2: mask = 0x0000000000000003ULL; break;
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| 357 | case 3: mask = 0x0000000000000007ULL; break;
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| 358 | case 4: mask = 0x000000000000000FULL; break;
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| 359 | case 5: mask = 0x000000000000001FULL; break;
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| 360 | case 6: mask = 0x000000000000003FULL; break;
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| 361 | case 7: mask = 0x000000000000007FULL; break;
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| 362 | case 8: mask = 0x00000000000000FFULL; break;
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| 363 | case 9: mask = 0x00000000000001FFULL; break;
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| 364 | case 10: mask = 0x00000000000003FFULL; break;
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| 365 | case 11: mask = 0x00000000000007FFULL; break;
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| 366 | case 12: mask = 0x0000000000000FFFULL; break;
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| 367 | case 13: mask = 0x0000000000001FFFULL; break;
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| 368 | case 14: mask = 0x0000000000003FFFULL; break;
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| 369 | case 15: mask = 0x0000000000007FFFULL; break;
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| 370 | case 16: mask = 0x000000000000FFFFULL; break;
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| 371 | case 17: mask = 0x000000000001FFFFULL; break;
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| 372 | case 18: mask = 0x000000000003FFFFULL; break;
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| 373 | case 19: mask = 0x000000000007FFFFULL; break;
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| 374 | case 20: mask = 0x00000000000FFFFFULL; break;
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| 375 | case 21: mask = 0x00000000001FFFFFULL; break;
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| 376 | case 22: mask = 0x00000000003FFFFFULL; break;
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| 377 | case 23: mask = 0x00000000007FFFFFULL; break;
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| 378 | case 24: mask = 0x0000000000FFFFFFULL; break;
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| 379 | case 25: mask = 0x0000000001FFFFFFULL; break;
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| 380 | case 26: mask = 0x0000000003FFFFFFULL; break;
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| 381 | case 27: mask = 0x0000000007FFFFFFULL; break;
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| 382 | case 28: mask = 0x000000000FFFFFFFULL; break;
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| 383 | case 29: mask = 0x000000001FFFFFFFULL; break;
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| 384 | case 30: mask = 0x000000003FFFFFFFULL; break;
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| 385 | case 31: mask = 0x000000007FFFFFFFULL; break;
|
|---|
| 386 | case 32: mask = 0x00000000FFFFFFFFULL; break;
|
|---|
| 387 | case 33: mask = 0x00000001FFFFFFFFULL; break;
|
|---|
| 388 | case 34: mask = 0x00000003FFFFFFFFULL; break;
|
|---|
| 389 | case 35: mask = 0x00000007FFFFFFFFULL; break;
|
|---|
| 390 | case 36: mask = 0x0000000FFFFFFFFFULL; break;
|
|---|
| 391 | case 37: mask = 0x0000001FFFFFFFFFULL; break;
|
|---|
| 392 | case 38: mask = 0x0000003FFFFFFFFFULL; break;
|
|---|
| 393 | case 39: mask = 0x0000007FFFFFFFFFULL; break;
|
|---|
| 394 | case 40: mask = 0x000000FFFFFFFFFFULL; break;
|
|---|
| 395 | case 41: mask = 0x000001FFFFFFFFFFULL; break;
|
|---|
| 396 | case 42: mask = 0x000003FFFFFFFFFFULL; break;
|
|---|
| 397 | case 43: mask = 0x000007FFFFFFFFFFULL; break;
|
|---|
| 398 | case 44: mask = 0x00000FFFFFFFFFFFULL; break;
|
|---|
| 399 | case 45: mask = 0x00001FFFFFFFFFFFULL; break;
|
|---|
| 400 | case 46: mask = 0x00003FFFFFFFFFFFULL; break;
|
|---|
| 401 | case 47: mask = 0x00007FFFFFFFFFFFULL; break;
|
|---|
| 402 | case 48: mask = 0x0000FFFFFFFFFFFFULL; break;
|
|---|
| 403 | case 49: mask = 0x0001FFFFFFFFFFFFULL; break;
|
|---|
| 404 | case 50: mask = 0x0003FFFFFFFFFFFFULL; break;
|
|---|
| 405 | case 51: mask = 0x0007FFFFFFFFFFFFULL; break;
|
|---|
| 406 | case 52: mask = 0x000FFFFFFFFFFFFFULL; break;
|
|---|
| 407 | case 53: mask = 0x001FFFFFFFFFFFFFULL; break;
|
|---|
| 408 | case 54: mask = 0x003FFFFFFFFFFFFFULL; break;
|
|---|
| 409 | case 55: mask = 0x007FFFFFFFFFFFFFULL; break;
|
|---|
| 410 | case 56: mask = 0x00FFFFFFFFFFFFFFULL; break;
|
|---|
| 411 | case 57: mask = 0x01FFFFFFFFFFFFFFULL; break;
|
|---|
| 412 | case 58: mask = 0x03FFFFFFFFFFFFFFULL; break;
|
|---|
| 413 | case 59: mask = 0x07FFFFFFFFFFFFFFULL; break;
|
|---|
| 414 | case 60: mask = 0x0FFFFFFFFFFFFFFFULL; break;
|
|---|
| 415 | case 61: mask = 0x1FFFFFFFFFFFFFFFULL; break;
|
|---|
| 416 | case 62: mask = 0x3FFFFFFFFFFFFFFFULL; break;
|
|---|
| 417 | case 63: mask = 0x7FFFFFFFFFFFFFFFULL; break;
|
|---|
| 418 | case 64: mask = 0xFFFFFFFFFFFFFFFFULL; break;
|
|---|
| 419 | default: mask = 0; break;
|
|---|
| 420 | }
|
|---|
| 421 | return mask;
|
|---|
| 422 | }
|
|---|
| 423 |
|
|---|
| 424 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 425 | /// Returns a 64-bits shifted-left mask corresponding to the length parameter
|
|---|
| 426 | inline unsigned long long getShiftMask64(const unsigned int shift, const unsigned int length)
|
|---|
| 427 | {
|
|---|
| 428 | unsigned long long mask;
|
|---|
| 429 | mask = getMask64( length );
|
|---|
| 430 | mask <<= shift;
|
|---|
| 431 | return mask;
|
|---|
| 432 | }
|
|---|
| 433 |
|
|---|
| 434 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 435 | /// Big Endian - Motorola coding
|
|---|
| 436 | inline bool mDecodeToBool(const unsigned char * data, const unsigned int startBit)
|
|---|
| 437 | {
|
|---|
| 438 | return (data[startBit>>3] & getShiftMask8(startBit&0x07,1)) != 0;
|
|---|
| 439 | }
|
|---|
| 440 |
|
|---|
| 441 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 442 | // Big Endian - Motorola coding
|
|---|
| 443 | // to test ?
|
|---|
| 444 | inline bool mDecodeToUI64(unsigned long long * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 445 | {
|
|---|
| 446 | if (length > 64) {
|
|---|
| 447 | *result = 0;
|
|---|
| 448 | return false;
|
|---|
| 449 | }
|
|---|
| 450 |
|
|---|
| 451 | if (length == 64) {
|
|---|
| 452 | // only work if data are correctly byte-aligned
|
|---|
| 453 | unsigned char c[8]; // c[0] = MSB
|
|---|
| 454 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 455 | c[i] = data[(startBit>>3) + i];
|
|---|
| 456 |
|
|---|
| 457 | unsigned long long temp = 0;
|
|---|
| 458 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 459 | temp += (c[i] << ( 56 - (8*i) ) );
|
|---|
| 460 | *result = temp;
|
|---|
| 461 | return true;
|
|---|
| 462 | } else {
|
|---|
| 463 | unsigned char c[8], mask[8], nbBits[8]; // MSB = c[0]
|
|---|
| 464 | nbBits[0] = (startBit & 0x07)+1;
|
|---|
| 465 | mask[0] = getMask8( nbBits[0] );
|
|---|
| 466 | c[0] = data[startBit>>3] & mask[0];
|
|---|
| 467 | unsigned short nbBitsIncrement = nbBits[0];
|
|---|
| 468 | for (int i = 1 ; i < 8 ; i++) {
|
|---|
| 469 | nbBits[i] = static_cast<unsigned char>( (length - nbBitsIncrement) < 8 ? length - nbBitsIncrement : 8 );
|
|---|
| 470 | nbBitsIncrement += nbBits[i];
|
|---|
| 471 | mask[i] = getShiftMask8(8 - nbBits[i],nbBits[i]);
|
|---|
| 472 | c[i] = data[(startBit>>3) + i] & mask[i];
|
|---|
| 473 | }
|
|---|
| 474 |
|
|---|
| 475 | unsigned long long temp = 0;
|
|---|
| 476 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 477 | temp += (c[i] << ( 56 - (8*i) ) );
|
|---|
| 478 | *result = temp >> (56 + (startBit&0x07) + 1 - length);
|
|---|
| 479 | return true;
|
|---|
| 480 | }
|
|---|
| 481 | }
|
|---|
| 482 |
|
|---|
| 483 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 484 | // Big Endian - Motorola coding
|
|---|
| 485 | // to test ?
|
|---|
| 486 | inline bool mDecodeToI64(long long *result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 487 | {
|
|---|
| 488 | if (length>64) {
|
|---|
| 489 | *result = 0;
|
|---|
| 490 | return false;
|
|---|
| 491 | }
|
|---|
| 492 |
|
|---|
| 493 | if (length == 64) {
|
|---|
| 494 | // only work if data are correctly byte-aligned
|
|---|
| 495 | unsigned char c[8]; // c[0] = MSB
|
|---|
| 496 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 497 | c[i] = data[(startBit>>3) + i];
|
|---|
| 498 |
|
|---|
| 499 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 500 | *result += (c[i] << ( 56 - (8*i) ) );
|
|---|
| 501 |
|
|---|
| 502 | // need to be signed ??
|
|---|
| 503 | return true;
|
|---|
| 504 | } else {
|
|---|
| 505 | unsigned char c[8], mask[8], nbBits[8]; // MSB = c[0]
|
|---|
| 506 | nbBits[0] = (startBit & 0x07)+1;
|
|---|
| 507 | mask[0] = getMask8( nbBits[0] );
|
|---|
| 508 | c[0] = data[startBit>>3] & mask[0];
|
|---|
| 509 | unsigned short nbBitsIncrement = nbBits[0];
|
|---|
| 510 | for (int i = 1 ; i < 8 ; i++) {
|
|---|
| 511 | nbBits[i] = static_cast<unsigned char>( (length - nbBitsIncrement) < 8 ? (length - nbBitsIncrement) : 8 );
|
|---|
| 512 | nbBitsIncrement += nbBits[i];
|
|---|
| 513 | mask[i] = getShiftMask8(8 - nbBits[i],nbBits[i]);
|
|---|
| 514 | c[i] = data[(startBit>>3) + i] & mask[i];
|
|---|
| 515 | }
|
|---|
| 516 | unsigned long long temp = 0;
|
|---|
| 517 | for (int i = 0 ; i < 8 ; i++)
|
|---|
| 518 | temp += (c[i] << ( 56 - (8*i) ) );
|
|---|
| 519 | temp >>= (56 + (startBit&0x07) + 1 - length);
|
|---|
| 520 |
|
|---|
| 521 | if ( temp & getShiftMask64(length-1,1) )
|
|---|
| 522 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 523 | *result = -1 * ( ( (~temp) + 1 ) & getMask64(length) );
|
|---|
| 524 | else
|
|---|
| 525 | *result = temp;
|
|---|
| 526 |
|
|---|
| 527 | return true;
|
|---|
| 528 | }
|
|---|
| 529 | }
|
|---|
| 530 |
|
|---|
| 531 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 532 | // Big Endian - Motorola coding
|
|---|
| 533 | // ok
|
|---|
| 534 | inline bool mDecodeToUI32(unsigned long *result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 535 | {
|
|---|
| 536 | if (length>32) {
|
|---|
| 537 | *result = 0;
|
|---|
| 538 | return false;
|
|---|
| 539 | }
|
|---|
| 540 |
|
|---|
| 541 | // verify that the frame is not spread in 5 bytes
|
|---|
| 542 | if (mSpreadOnMoreThan4Bytes(startBit, length)) {
|
|---|
| 543 | // decode in a 64-bits integer
|
|---|
| 544 | unsigned long long temp;
|
|---|
| 545 | if (mDecodeToUI64(&temp,data,startBit,length))
|
|---|
| 546 | {
|
|---|
| 547 | *result = static_cast<unsigned long> (temp);
|
|---|
| 548 | return true;
|
|---|
| 549 | } else {
|
|---|
| 550 | *result = 0;
|
|---|
| 551 | return false;
|
|---|
| 552 | }
|
|---|
| 553 | } else {
|
|---|
| 554 | if (length == 32) {
|
|---|
| 555 | // only work if data are correctly byte-aligned
|
|---|
| 556 | unsigned char c1, c2, c3, c4;
|
|---|
| 557 | c1 = data[startBit>>3];
|
|---|
| 558 | c2 = data[(startBit>>3) + 1];
|
|---|
| 559 | c3 = data[(startBit>>3) + 2];
|
|---|
| 560 | c4 = data[(startBit>>3) + 3];
|
|---|
| 561 |
|
|---|
| 562 | *result = (c1 << 24) + (c2 << 16) + (c3 << 8) + c4;
|
|---|
| 563 | return true;
|
|---|
| 564 | } else {
|
|---|
| 565 | unsigned char c[4], mask[4], nbBits[4]; // MSB = c[0]
|
|---|
| 566 | nbBits[0] = (startBit & 0x07)+1;
|
|---|
| 567 | nbBits[1] = static_cast<unsigned char>( (length - nbBits[0]) < 8 ? length - nbBits[0] : 8 );
|
|---|
| 568 | nbBits[2] = static_cast<unsigned char>( (length - nbBits[0] - nbBits[1]) < 8 ? (length - nbBits[0] - nbBits[1]) : 8 );
|
|---|
| 569 | nbBits[3] = static_cast<unsigned char>( (length - nbBits[0] - nbBits[1] - nbBits[2]) < 8 ? (length - nbBits[0] - nbBits[1] - nbBits[2]) : 8 );
|
|---|
| 570 | mask[0] = getMask8( nbBits[0] );
|
|---|
| 571 | mask[1] = getShiftMask8(8 - nbBits[1],nbBits[1]);
|
|---|
| 572 | mask[2] = getShiftMask8(8 - nbBits[2],nbBits[2]);
|
|---|
| 573 | mask[3] = getShiftMask8(8 - nbBits[3],nbBits[3]);
|
|---|
| 574 | c[0] = data[startBit>>3] & mask[0];
|
|---|
| 575 | c[1] = data[(startBit>>3) + 1] & mask[1];
|
|---|
| 576 | c[2] = data[(startBit>>3) + 2] & mask[2];
|
|---|
| 577 | c[3] = data[(startBit>>3) + 3] & mask[3];
|
|---|
| 578 | *result = ( (c[0]<<24) + (c[1]<<16) + (c[2]<<8) + c[3]) >> (24 + (startBit&0x07) + 1 - length);
|
|---|
| 579 | return true;
|
|---|
| 580 | }
|
|---|
| 581 | }
|
|---|
| 582 | }
|
|---|
| 583 |
|
|---|
| 584 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 585 | // Big Endian - Motorola coding
|
|---|
| 586 | // ok
|
|---|
| 587 | inline bool mDecodeToI32(long *result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 588 | {
|
|---|
| 589 | if (length>32) {
|
|---|
| 590 | *result = 0;
|
|---|
| 591 | return false;
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | // verify that the frame is not spread in 5 bytes
|
|---|
| 595 | if (mSpreadOnMoreThan4Bytes(startBit, length)) {
|
|---|
| 596 | // decode in a 64-bits integer
|
|---|
| 597 | long long temp;
|
|---|
| 598 | if (mDecodeToI64(&temp,data,startBit,length))
|
|---|
| 599 | {
|
|---|
| 600 | *result = static_cast<long>(temp);
|
|---|
| 601 | return true;
|
|---|
| 602 | } else {
|
|---|
| 603 | *result = 0;
|
|---|
| 604 | return false;
|
|---|
| 605 | }
|
|---|
| 606 | } else {
|
|---|
| 607 | if (length == 32)
|
|---|
| 608 | {
|
|---|
| 609 | // only work if data are correctly byte-aligned
|
|---|
| 610 | unsigned char c1, c2, c3, c4;
|
|---|
| 611 | c1 = data[startBit>>3];
|
|---|
| 612 | c2 = data[(startBit>>3) + 1];
|
|---|
| 613 | c3 = data[(startBit>>3) + 2];
|
|---|
| 614 | c4 = data[(startBit>>3) + 3];
|
|---|
| 615 |
|
|---|
| 616 | *result = (c1 << 24) + (c2 << 16) + (c3 << 8) + c4;
|
|---|
| 617 | return true;
|
|---|
| 618 | } else {
|
|---|
| 619 | unsigned char c[4], mask[4], nbBits[4]; // MSB = c[0]
|
|---|
| 620 | nbBits[0] = (startBit & 0x07) + 1;
|
|---|
| 621 | nbBits[1] = static_cast<unsigned char>( (length - nbBits[0]) < 8 ? length - nbBits[0] : 8 );
|
|---|
| 622 | nbBits[2] = static_cast<unsigned char>( (length - nbBits[0] - nbBits[1]) < 8 ? (length - nbBits[0] - nbBits[1]) : 8 );
|
|---|
| 623 | nbBits[3] = static_cast<unsigned char>( (length - nbBits[0] - nbBits[1] - nbBits[2]) < 8 ? length - nbBits[0] - nbBits[1] - nbBits[2] : 8 );
|
|---|
| 624 | mask[0] = getMask8( nbBits[0] );
|
|---|
| 625 | mask[1] = getShiftMask8(8 - nbBits[1],nbBits[1]);
|
|---|
| 626 | mask[2] = getShiftMask8(8 - nbBits[2],nbBits[2]);
|
|---|
| 627 | mask[3] = getShiftMask8(8 - nbBits[3],nbBits[3]);
|
|---|
| 628 | c[0] = data[startBit>>3] & mask[0];
|
|---|
| 629 | c[1] = data[(startBit>>3) + 1] & mask[1];
|
|---|
| 630 | c[2] = data[(startBit>>3) + 2] & mask[2];
|
|---|
| 631 | c[3] = data[(startBit>>3) + 3] & mask[3];
|
|---|
| 632 |
|
|---|
| 633 | unsigned long temp = ( (c[0]<<24) + (c[1]<<16) + (c[2]<<8) + c[3]) >> (24 + (startBit&0x07) + 1 - length);
|
|---|
| 634 | if (temp & getShiftMask32(length-1, 1))
|
|---|
| 635 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 636 | *result = -1 * ( ( (~temp) + 1 ) & getMask32(length) );
|
|---|
| 637 | else
|
|---|
| 638 | *result = temp;
|
|---|
| 639 | return true;
|
|---|
| 640 | }
|
|---|
| 641 | }
|
|---|
| 642 | }
|
|---|
| 643 |
|
|---|
| 644 |
|
|---|
| 645 |
|
|---|
| 646 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 647 | // Big Endian - Motorola coding
|
|---|
| 648 | // ok
|
|---|
| 649 | inline bool mDecodeToUI16(unsigned short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 650 | {
|
|---|
| 651 | if (length > 16) {
|
|---|
| 652 | *result = 0;
|
|---|
| 653 | return false;
|
|---|
| 654 | }
|
|---|
| 655 |
|
|---|
| 656 | // verify that the frame is not spread in 3 bytes
|
|---|
| 657 | if (mSpreadOnMoreThan2Bytes(startBit, length)) {
|
|---|
| 658 | // decode in a 32-bits integer
|
|---|
| 659 | unsigned long temp;
|
|---|
| 660 | if (mDecodeToUI32(&temp,data,startBit,length)) {
|
|---|
| 661 | *result = static_cast<unsigned short>(temp);
|
|---|
| 662 | return true;
|
|---|
| 663 | } else {
|
|---|
| 664 | *result = 0;
|
|---|
| 665 | return false;
|
|---|
| 666 | }
|
|---|
| 667 | } else {
|
|---|
| 668 | if (length == 16) {
|
|---|
| 669 | // only work if data are correctly byte-aligned
|
|---|
| 670 | unsigned char LSB, MSB;
|
|---|
| 671 | MSB = data[startBit>>3];
|
|---|
| 672 | LSB = data[(startBit>>3) + 1];
|
|---|
| 673 |
|
|---|
| 674 | *result = ( (MSB << 8) + LSB );
|
|---|
| 675 | return true;
|
|---|
| 676 | } else {
|
|---|
| 677 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 678 | nbBitsMSB = (startBit & 0x07) + 1; // the number of bits contained in the MSB
|
|---|
| 679 | nbBitsLSB = static_cast<unsigned char>(length - nbBitsMSB);
|
|---|
| 680 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 681 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 682 | MSB = data[startBit>>3] & maskMSB;
|
|---|
| 683 | LSB = data[(startBit>>3) + 1] & maskLSB;
|
|---|
| 684 |
|
|---|
| 685 | *result = ( (MSB << 8) + LSB ) >> (8 + (startBit&0x07) + 1 - length);
|
|---|
| 686 | return true;
|
|---|
| 687 | }
|
|---|
| 688 | }
|
|---|
| 689 | }
|
|---|
| 690 |
|
|---|
| 691 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 692 | // Big Endian - Motorola coding
|
|---|
| 693 | // ok
|
|---|
| 694 | inline bool mDecodeToI16(short *result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 695 | {
|
|---|
| 696 | if (length > 16) {
|
|---|
| 697 | *result = 0;
|
|---|
| 698 | return false;
|
|---|
| 699 | }
|
|---|
| 700 |
|
|---|
| 701 | // verify that the frame is not spread in 3 bytes
|
|---|
| 702 | if (mSpreadOnMoreThan2Bytes(startBit, length)) {
|
|---|
| 703 | // decode in a 32-bits integer
|
|---|
| 704 | long temp;
|
|---|
| 705 | if (mDecodeToI32(&temp, data, startBit, length)) {
|
|---|
| 706 | *result = (short)temp;
|
|---|
| 707 | return true;
|
|---|
| 708 | } else {
|
|---|
| 709 | *result = 0;
|
|---|
| 710 | return false;
|
|---|
| 711 | }
|
|---|
| 712 | } else {
|
|---|
| 713 | // ok data are stored at most in 2 bytes
|
|---|
| 714 | if (length == 16) {
|
|---|
| 715 | // only work if data are correctly byte-aligned
|
|---|
| 716 | unsigned char LSB, MSB;
|
|---|
| 717 | MSB = data[startBit>>3];
|
|---|
| 718 | LSB = data[(startBit>>3) + 1];
|
|---|
| 719 | short temp = (MSB << 8) + LSB;
|
|---|
| 720 |
|
|---|
| 721 | // Attention : a-t on besoin d'appliquer le signe ?
|
|---|
| 722 | // n'est-il pas deja inclu dans la donn�e comme elle est correctement align�e sur l'octet ?
|
|---|
| 723 | if (temp & 0x8000) {
|
|---|
| 724 | // do the two's complement to get the signed value
|
|---|
| 725 | *result = - ( ( (~temp) + 1 ) & 0xFFFF );
|
|---|
| 726 | } else {
|
|---|
| 727 | *result = temp;
|
|---|
| 728 | }
|
|---|
| 729 | return true;
|
|---|
| 730 | } else {
|
|---|
| 731 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 732 | nbBitsMSB = (startBit & 0x07) + 1; // the number of bits contained in the MSB
|
|---|
| 733 | nbBitsLSB = static_cast<unsigned char>(length - nbBitsMSB);
|
|---|
| 734 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 735 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 736 | MSB = data[startBit>>3] & maskMSB;
|
|---|
| 737 | LSB = data[(startBit>>3) + 1] & maskLSB;
|
|---|
| 738 | // assign the MSB and LSB char in the short integer value and right-shift
|
|---|
| 739 | // to place the lsb to the bit 0
|
|---|
| 740 | unsigned short temp = ( (MSB << 8) + LSB ) >> (8 + (startBit&0x07) + 1 - length);
|
|---|
| 741 | if (temp & getShiftMask16(length-1,1))
|
|---|
| 742 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 743 | *result = -1 * ( ( (~temp) + 1 ) & getMask16(length) );
|
|---|
| 744 | else
|
|---|
| 745 | *result = temp;
|
|---|
| 746 | return true;
|
|---|
| 747 | }
|
|---|
| 748 | }
|
|---|
| 749 | }
|
|---|
| 750 |
|
|---|
| 751 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 752 | // Big Endian - Motorola coding
|
|---|
| 753 | // OK
|
|---|
| 754 | inline bool mDecodeToUI8(unsigned char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 755 | {
|
|---|
| 756 | if (length > 8) {
|
|---|
| 757 | *result = 0;
|
|---|
| 758 | return false;
|
|---|
| 759 | }
|
|---|
| 760 |
|
|---|
| 761 | // verify that the frame is not spread in 2 bytes
|
|---|
| 762 | if (mSpreadOnMoreThan1Byte(startBit, length)) {
|
|---|
| 763 | // decode in a 16-bit integer
|
|---|
| 764 | unsigned short temp;
|
|---|
| 765 | if ( mDecodeToUI16(&temp, data, startBit, length) ) {
|
|---|
| 766 | *result = static_cast<unsigned char>(temp);
|
|---|
| 767 | return true;
|
|---|
| 768 | } else {
|
|---|
| 769 | *result = 0;
|
|---|
| 770 | return false;
|
|---|
| 771 | }
|
|---|
| 772 | } else {
|
|---|
| 773 | // ok data is stored at most in 1 byte
|
|---|
| 774 | unsigned char c;
|
|---|
| 775 |
|
|---|
| 776 | c = data[startBit>>3]; // >>3 <=> div 8
|
|---|
| 777 | //c >>= (8-((startBit & 0x07)+1)); // &0x07 <=> modulo 8
|
|---|
| 778 | c >>= startBit & 0x07 - (length - 1); // &0x07 <=> modulo 8
|
|---|
| 779 | *result = c & getMask8( length );
|
|---|
| 780 |
|
|---|
| 781 | return true;
|
|---|
| 782 | }
|
|---|
| 783 | }
|
|---|
| 784 |
|
|---|
| 785 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 786 | // Big Endian - Motorola coding
|
|---|
| 787 | // OK
|
|---|
| 788 | inline bool mDecodeToI8(char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 789 | {
|
|---|
| 790 | if (length > 8) {
|
|---|
| 791 | *result = 0;
|
|---|
| 792 | return false;
|
|---|
| 793 | }
|
|---|
| 794 |
|
|---|
| 795 | // verify that the frame is not spread in 2 bytes
|
|---|
| 796 | if (mSpreadOnMoreThan1Byte(startBit, length)) {
|
|---|
| 797 | // decode in a 16-bit integer
|
|---|
| 798 | short temp;
|
|---|
| 799 | if ( mDecodeToI16(&temp, data, startBit, length) ) {
|
|---|
| 800 | *result = static_cast<char>(temp);
|
|---|
| 801 | return true;
|
|---|
| 802 | } else {
|
|---|
| 803 | *result = 0;
|
|---|
| 804 | return false;
|
|---|
| 805 | }
|
|---|
| 806 | }
|
|---|
| 807 | else {
|
|---|
| 808 | // ok data is stored at most in 1 byte
|
|---|
| 809 | char c;
|
|---|
| 810 | c = data[startBit>>3];
|
|---|
| 811 | c >>= (8-((startBit & 0x07)+1));
|
|---|
| 812 | c = c & getMask8( length );
|
|---|
| 813 |
|
|---|
| 814 | // a-t-on besoin d'appliquer le signe dans le cas ou length = 8
|
|---|
| 815 | // la donnee est correctement alignee sur l'octet donc le signe est peut-etre compris
|
|---|
| 816 | if (c & getShiftMask8(length-1,1))
|
|---|
| 817 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 818 | *result = - ( ( (~c) + 1 ) & getMask8(length) );
|
|---|
| 819 | else
|
|---|
| 820 | *result = c;
|
|---|
| 821 | return true;
|
|---|
| 822 | }
|
|---|
| 823 | }
|
|---|
| 824 |
|
|---|
| 825 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 826 | // Little Endian - Intel coding
|
|---|
| 827 | // ok
|
|---|
| 828 | inline bool iDecodeToBool(const unsigned char * data, const unsigned int startBit)
|
|---|
| 829 | {
|
|---|
| 830 | mDecodeToBool(data, startBit);
|
|---|
| 831 | }
|
|---|
| 832 |
|
|---|
| 833 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 834 | // Little Endian - Intel coding
|
|---|
| 835 | // pas de depassement possible - la trame CAN fait 64 bits max
|
|---|
| 836 | // gerer le signe
|
|---|
| 837 | inline bool iDecodeToUI64(unsigned long long * /*result*/, const unsigned char * /*data*/, const unsigned int /*startBit*/, const unsigned int /*length*/)
|
|---|
| 838 | {
|
|---|
| 839 | return true;
|
|---|
| 840 | }
|
|---|
| 841 |
|
|---|
| 842 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 843 | // Little Endian - Intel coding
|
|---|
| 844 | // pas de depassement possible - la trame CAN fait 64 bits max
|
|---|
| 845 | // gerer le signe
|
|---|
| 846 | inline bool iDecodeToI64(long long * /*result*/, const unsigned char * /*data*/, const unsigned int /*startBit*/, const unsigned int /*length*/)
|
|---|
| 847 | {
|
|---|
| 848 | return true;
|
|---|
| 849 | }
|
|---|
| 850 |
|
|---|
| 851 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 852 | // Little Endian - Intel coding
|
|---|
| 853 | // gerer le depassement sur plus de 4 octets : necessite la fonction de decodage 64 bits
|
|---|
| 854 | // verifier le depassement avant cette ligne : if (length == 32)
|
|---|
| 855 | inline bool iDecodeToUI32(unsigned long * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 856 | {
|
|---|
| 857 | if (length>32) {
|
|---|
| 858 | *result = 0;
|
|---|
| 859 | return false;
|
|---|
| 860 | }
|
|---|
| 861 |
|
|---|
| 862 | if (length == 32) {
|
|---|
| 863 | // only work if length == 32
|
|---|
| 864 | unsigned char c1, c2, c3, c4;
|
|---|
| 865 | c4 = data[startBit>>3]; // LSB
|
|---|
| 866 | c3 = data[(startBit>>3) + 1];
|
|---|
| 867 | c2 = data[(startBit>>3) + 2];
|
|---|
| 868 | c1 = data[(startBit>>3) + 3]; // MSB
|
|---|
| 869 |
|
|---|
| 870 | *result = (c1 << 24) + (c2 << 16) + (c3 << 8) + c4;
|
|---|
| 871 | return true;
|
|---|
| 872 | } else {
|
|---|
| 873 | // todo
|
|---|
| 874 | *result = 0;
|
|---|
| 875 | return false;
|
|---|
| 876 | }
|
|---|
| 877 | }
|
|---|
| 878 |
|
|---|
| 879 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 880 | // Little Endian - Intel coding
|
|---|
| 881 | // gerer le signe
|
|---|
| 882 | // gerer le depassement sur plus de 4 octets : necessite la fonction de decodage 64 bits
|
|---|
| 883 | // verifier le depassement avant cette ligne : if (length == 32)
|
|---|
| 884 | inline bool iDecodeToI32(long * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 885 | {
|
|---|
| 886 | if (length>32) {
|
|---|
| 887 | *result = 0;
|
|---|
| 888 | return false;
|
|---|
| 889 | }
|
|---|
| 890 |
|
|---|
| 891 | if (length == 32) {
|
|---|
| 892 | // only work if length == 32
|
|---|
| 893 | unsigned char c1, c2, c3, c4;
|
|---|
| 894 | c4 = data[startBit>>3]; // LSB
|
|---|
| 895 | c3 = data[(startBit>>3) + 1];
|
|---|
| 896 | c2 = data[(startBit>>3) + 2];
|
|---|
| 897 | c1 = data[(startBit>>3) + 3]; // MSB
|
|---|
| 898 |
|
|---|
| 899 | *result = (c1 << 24) + (c2 << 16) + (c3 << 8) + c4;
|
|---|
| 900 | return true;
|
|---|
| 901 | } else {
|
|---|
| 902 | // todo
|
|---|
| 903 | *result = 0;
|
|---|
| 904 | return false;
|
|---|
| 905 | }
|
|---|
| 906 | }
|
|---|
| 907 |
|
|---|
| 908 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 909 | // Little Endian - Intel coding
|
|---|
| 910 | // gerer le depassement sur plus de 2 octets
|
|---|
| 911 | // verifier le depassement avant cette ligne : if (length == 16)
|
|---|
| 912 | inline bool iDecodeToUI16(unsigned short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 913 | {
|
|---|
| 914 | if (length > 16) {
|
|---|
| 915 | *result = 0;
|
|---|
| 916 | return false;
|
|---|
| 917 | }
|
|---|
| 918 |
|
|---|
| 919 | if (length == 16) {
|
|---|
| 920 | // only work if length == 16
|
|---|
| 921 | unsigned char LSB, MSB;
|
|---|
| 922 | LSB = data[startBit>>3];
|
|---|
| 923 | MSB = data[(startBit>>3) + 1];
|
|---|
| 924 |
|
|---|
| 925 | *result = (MSB << 8) + LSB;
|
|---|
| 926 | return true;
|
|---|
| 927 | } else {
|
|---|
| 928 | // TODO
|
|---|
| 929 | *result = 0;
|
|---|
| 930 | return false;
|
|---|
| 931 | }
|
|---|
| 932 | }
|
|---|
| 933 |
|
|---|
| 934 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 935 | // Little Endian - Intel coding
|
|---|
| 936 | // gerer le signe
|
|---|
| 937 | // gerer le depassement sur plus de 2 octets
|
|---|
| 938 | // verifier le depassement avant cette ligne : if (length == 16)
|
|---|
| 939 | // manque le decalage
|
|---|
| 940 | inline bool iDecodeToI16(short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 941 | {
|
|---|
| 942 | if (length > 16) {
|
|---|
| 943 | *result = 0;
|
|---|
| 944 | return false;
|
|---|
| 945 | }
|
|---|
| 946 |
|
|---|
| 947 | if (length == 16) {
|
|---|
| 948 | // only work if length == 16
|
|---|
| 949 | unsigned char LSB, MSB;
|
|---|
| 950 | LSB = data[startBit>>3];
|
|---|
| 951 | MSB = data[(startBit>>3) + 1];
|
|---|
| 952 |
|
|---|
| 953 | *result = (MSB << 8) + LSB;
|
|---|
| 954 | return true;
|
|---|
| 955 | } else {
|
|---|
| 956 | // todo
|
|---|
| 957 | *result = 0;
|
|---|
| 958 | return false;
|
|---|
| 959 | }
|
|---|
| 960 | }
|
|---|
| 961 |
|
|---|
| 962 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 963 | // Little Endian - Intel coding
|
|---|
| 964 | // OK
|
|---|
| 965 | inline bool iDecodeToUI8(unsigned char * result,const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 966 | {
|
|---|
| 967 | if (length > 8) {
|
|---|
| 968 | *result = 0;
|
|---|
| 969 | return false;
|
|---|
| 970 | }
|
|---|
| 971 |
|
|---|
| 972 | // verify that the frame is not spread in 2 bytes
|
|---|
| 973 | if (iSpreadOnMoreThan1Byte(startBit, length)) {
|
|---|
| 974 | // decode in a 16-bit integer
|
|---|
| 975 | unsigned short temp;
|
|---|
| 976 | if ( iDecodeToUI16(&temp, data, startBit, length) ) {
|
|---|
| 977 | // and cast in an 8 bit integer
|
|---|
| 978 | *result = (unsigned char) temp;
|
|---|
| 979 | return true;
|
|---|
| 980 | } else {
|
|---|
| 981 | *result = 0;
|
|---|
| 982 | return true;
|
|---|
| 983 | }
|
|---|
| 984 | } else {
|
|---|
| 985 | // ok data is stored at most in 1 byte
|
|---|
| 986 | unsigned char c;
|
|---|
| 987 | c = data[startBit>>3];
|
|---|
| 988 | c >>= (startBit & 0x07);
|
|---|
| 989 | *result = c & getMask8( length );
|
|---|
| 990 |
|
|---|
| 991 | return true;
|
|---|
| 992 | }
|
|---|
| 993 | }
|
|---|
| 994 |
|
|---|
| 995 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 996 | // Little Endian - Intel coding
|
|---|
| 997 | // OK
|
|---|
| 998 | inline bool iDecodeToI8(char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 999 | {
|
|---|
| 1000 | if (length > 8) {
|
|---|
| 1001 | *result = 0;
|
|---|
| 1002 | return false;
|
|---|
| 1003 | }
|
|---|
| 1004 |
|
|---|
| 1005 | // verify that the frame is not spread in 2 bytes
|
|---|
| 1006 | if (iSpreadOnMoreThan1Byte(startBit, length)) {
|
|---|
| 1007 | // decode in a 16-bit integer
|
|---|
| 1008 | short temp;
|
|---|
| 1009 | if ( iDecodeToI16(&temp, data, startBit, length) ) {
|
|---|
| 1010 | // and cast in an 8 bit integer
|
|---|
| 1011 | *result = static_cast<char>(temp);
|
|---|
| 1012 | return true;
|
|---|
| 1013 | } else {
|
|---|
| 1014 | *result = 0;
|
|---|
| 1015 | return true;
|
|---|
| 1016 | }
|
|---|
| 1017 | } else {
|
|---|
| 1018 | // ok data is stored at most in 1 byte
|
|---|
| 1019 | char c;
|
|---|
| 1020 | c = data[startBit>>3]; // >>3 <=> div 8
|
|---|
| 1021 | c >>= (startBit & 0x07); // &0x07 <=> modulo 8
|
|---|
| 1022 | c = c & getMask8( length );
|
|---|
| 1023 | if (c & getShiftMask8(length-1,1))
|
|---|
| 1024 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 1025 | *result = - ( ( (~c) + 1 ) & getMask8(length) );
|
|---|
| 1026 | else
|
|---|
| 1027 | *result = c;
|
|---|
| 1028 |
|
|---|
| 1029 | return true;
|
|---|
| 1030 | }
|
|---|
| 1031 | }
|
|---|
| 1032 |
|
|---|
| 1033 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1034 | // Big Endian - Motorola coding
|
|---|
| 1035 | // ok
|
|---|
| 1036 | inline bool mobileyemDecodeToUI16(unsigned short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1037 | {
|
|---|
| 1038 | if (length>16){ *result = 0; return false; }
|
|---|
| 1039 |
|
|---|
| 1040 | // verify that the frame is not spread in 3 bytes
|
|---|
| 1041 | /* if (mSpreadOnMoreThan2Bytes(startBit, length))
|
|---|
| 1042 | {
|
|---|
| 1043 | // decode in a 32-bits integer
|
|---|
| 1044 | unsigned long temp;
|
|---|
| 1045 | if (mDecodeToUI32(&temp,data,startBit,length))
|
|---|
| 1046 | {
|
|---|
| 1047 | *result = static_cast<unsigned short>(temp);
|
|---|
| 1048 | return true;
|
|---|
| 1049 | } else {
|
|---|
| 1050 | *result = 0;
|
|---|
| 1051 | return false;
|
|---|
| 1052 | }
|
|---|
| 1053 | }
|
|---|
| 1054 | else
|
|---|
| 1055 | {*/
|
|---|
| 1056 | if (length == 16) {
|
|---|
| 1057 | // only work if data are correctly byte-aligned
|
|---|
| 1058 | unsigned char LSB, MSB;
|
|---|
| 1059 | MSB = data[startBit>>3];
|
|---|
| 1060 | LSB = data[(startBit>>3) + 1];
|
|---|
| 1061 |
|
|---|
| 1062 | *result = ( (MSB << 8) + LSB );
|
|---|
| 1063 | return true;
|
|---|
| 1064 | } else {
|
|---|
| 1065 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 1066 | nbBitsMSB = (startBit & 0x07) + 1; // the number of bits contained in the MSB
|
|---|
| 1067 | nbBitsLSB = static_cast<unsigned char>(length - nbBitsMSB);
|
|---|
| 1068 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 1069 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 1070 | MSB = data[startBit>>3] & maskMSB;
|
|---|
| 1071 | LSB = data[(startBit>>3) + 1] & maskLSB;
|
|---|
| 1072 |
|
|---|
| 1073 | *result = ( (MSB << 8) + LSB ) >> (8 + (startBit&0x07) + 1 - length);
|
|---|
| 1074 | return true;
|
|---|
| 1075 | }
|
|---|
| 1076 | //}
|
|---|
| 1077 | }
|
|---|
| 1078 |
|
|---|
| 1079 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1080 | // Big Endian - Motorola coding
|
|---|
| 1081 | // ok
|
|---|
| 1082 | inline bool mobileyemDecodeToI16(short *result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1083 | {
|
|---|
| 1084 | if (length>16) { *result = 0; return false; }
|
|---|
| 1085 |
|
|---|
| 1086 | // verify that the frame is not spread in 3 bytes
|
|---|
| 1087 | /* if (mSpreadOnMoreThan2Bytes(startBit, length))
|
|---|
| 1088 | {
|
|---|
| 1089 | // decode in a 32-bits integer
|
|---|
| 1090 | long temp;
|
|---|
| 1091 | if (mDecodeToI32(&temp, data, startBit, length)) {
|
|---|
| 1092 | *result = (short)temp;
|
|---|
| 1093 | return true;
|
|---|
| 1094 | } else {
|
|---|
| 1095 | *result = 0;
|
|---|
| 1096 | return false;
|
|---|
| 1097 | }
|
|---|
| 1098 | }
|
|---|
| 1099 | else // ok data are stored at most in 2 bytes
|
|---|
| 1100 | {*/
|
|---|
| 1101 | if (length == 16)
|
|---|
| 1102 | {
|
|---|
| 1103 | // only work if data are correctly byte-aligned
|
|---|
| 1104 | unsigned char LSB, MSB;
|
|---|
| 1105 | MSB = data[startBit>>3];
|
|---|
| 1106 | LSB = data[(startBit>>3) + 1];
|
|---|
| 1107 | short temp = (MSB << 8) + LSB;
|
|---|
| 1108 |
|
|---|
| 1109 | // Attention : a-t on besoin d'appliquer le signe ?
|
|---|
| 1110 | // n'est-il pas deja inclu dans la donn�e comme elle est correctement align�e sur l'octet ?
|
|---|
| 1111 | if (temp & 0x8000) {
|
|---|
| 1112 | // do the two's complement to get the signed value
|
|---|
| 1113 | *result = - ( ( (~temp) + 1 ) & 0xFFFF );
|
|---|
| 1114 | } else {
|
|---|
| 1115 | *result = temp;
|
|---|
| 1116 | }
|
|---|
| 1117 | return true;
|
|---|
| 1118 | } else {
|
|---|
| 1119 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 1120 | nbBitsMSB = (startBit & 0x07)+1; // the number of bits contained in the MSB
|
|---|
| 1121 | nbBitsLSB = static_cast<unsigned char>(length - nbBitsMSB);
|
|---|
| 1122 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 1123 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 1124 | MSB = data[startBit>>3] & maskMSB;
|
|---|
| 1125 | LSB = data[(startBit>>3) + 1] & maskLSB;
|
|---|
| 1126 | // assign the MSB and LSB char in the short integer value and right-shift
|
|---|
| 1127 | // to place the lsb to the bit 0
|
|---|
| 1128 | unsigned short temp = ( (MSB << 8) + LSB ) >> (8 + (startBit&0x07) + 1 - length);
|
|---|
| 1129 | if (temp & getShiftMask16(length-1,1))
|
|---|
| 1130 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 1131 | *result = -1 * ( ( (~temp) + 1 ) & getMask16(length) );
|
|---|
| 1132 | else
|
|---|
| 1133 | *result = temp;
|
|---|
| 1134 | return true;
|
|---|
| 1135 | }
|
|---|
| 1136 | //}
|
|---|
| 1137 | }
|
|---|
| 1138 |
|
|---|
| 1139 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1140 | // Big Endian - Motorola coding
|
|---|
| 1141 | // OK
|
|---|
| 1142 | inline bool mobileyemDecodeToUI8(unsigned char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1143 | {
|
|---|
| 1144 | if (length>8) { *result = 0; return false; }
|
|---|
| 1145 |
|
|---|
| 1146 | // verify that the frame is not spread in 2 bytes
|
|---|
| 1147 | if (mSpreadOnMoreThan1Byte(startBit, length))
|
|---|
| 1148 | {
|
|---|
| 1149 | // decode in a 16-bit integer
|
|---|
| 1150 | unsigned short temp;
|
|---|
| 1151 | if ( mDecodeToUI16(&temp, data, startBit, length) ) {
|
|---|
| 1152 | *result = static_cast<unsigned char>(temp);
|
|---|
| 1153 | return true;
|
|---|
| 1154 | } else {
|
|---|
| 1155 | *result = 0;
|
|---|
| 1156 | return true;
|
|---|
| 1157 | }
|
|---|
| 1158 | }
|
|---|
| 1159 | else // ok data is stored at most in 1 byte
|
|---|
| 1160 | {
|
|---|
| 1161 | unsigned char c;
|
|---|
| 1162 | c = data[startBit>>3]; // >>3 <=> div 8
|
|---|
| 1163 | c >>= (8-((startBit & 0x07)+1)); // &0x07 <=> modulo 8
|
|---|
| 1164 | *result = c & getMask8( length );
|
|---|
| 1165 |
|
|---|
| 1166 | return true;
|
|---|
| 1167 | }
|
|---|
| 1168 | }
|
|---|
| 1169 |
|
|---|
| 1170 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1171 | // Big Endian - Motorola coding
|
|---|
| 1172 | // OK
|
|---|
| 1173 | inline bool mobileyemDecodeToI8(char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1174 | {
|
|---|
| 1175 | if (length>8) { *result = 0; return false; }
|
|---|
| 1176 |
|
|---|
| 1177 | // verify that the frame is not spread in 2 bytes
|
|---|
| 1178 | if (mSpreadOnMoreThan1Byte(startBit, length))
|
|---|
| 1179 | {
|
|---|
| 1180 | // decode in a 16-bit integer
|
|---|
| 1181 | short temp;
|
|---|
| 1182 | if ( mDecodeToI16(&temp, data, startBit, length) ) {
|
|---|
| 1183 | *result = static_cast<char>(temp);
|
|---|
| 1184 | return true;
|
|---|
| 1185 | } else {
|
|---|
| 1186 | *result = 0;
|
|---|
| 1187 | return true;
|
|---|
| 1188 | }
|
|---|
| 1189 | }
|
|---|
| 1190 | else // ok data is stored at most in 1 byte
|
|---|
| 1191 | {
|
|---|
| 1192 | char c;
|
|---|
| 1193 | c = data[startBit>>3];
|
|---|
| 1194 | c >>= (8-((startBit & 0x07)+1));
|
|---|
| 1195 | c = c & getMask8( length );
|
|---|
| 1196 |
|
|---|
| 1197 | // a-t-on besoin d'appliquer le signe dans le cas ou length = 8
|
|---|
| 1198 | // la donnee est correctement alignee sur l'octet donc le signe est peut-etre compris
|
|---|
| 1199 | if (c & getShiftMask8(length-1,1))
|
|---|
| 1200 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 1201 | *result = - ( ( (~c) + 1 ) & getMask8(length) );
|
|---|
| 1202 | else
|
|---|
| 1203 | *result = c;
|
|---|
| 1204 | return true;
|
|---|
| 1205 | }
|
|---|
| 1206 | }
|
|---|
| 1207 |
|
|---|
| 1208 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1209 | // Little Endian - Intel coding
|
|---|
| 1210 | // OK, mais gerer le depassement sur plus de 2 octets
|
|---|
| 1211 | inline bool mobileyeiDecodeToUI16(unsigned short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1212 | {
|
|---|
| 1213 | if (length>16) {
|
|---|
| 1214 | *result = 0;
|
|---|
| 1215 | return false;
|
|---|
| 1216 | }
|
|---|
| 1217 |
|
|---|
| 1218 | if (length == 16) {
|
|---|
| 1219 | // only work if length == 16
|
|---|
| 1220 | unsigned char LSB, MSB;
|
|---|
| 1221 | LSB = data[startBit>>3];
|
|---|
| 1222 | MSB = data[(startBit>>3) + 1];
|
|---|
| 1223 |
|
|---|
| 1224 | *result = (unsigned short)((MSB << 8) + LSB);
|
|---|
| 1225 | return true;
|
|---|
| 1226 | } else {
|
|---|
| 1227 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 1228 |
|
|---|
| 1229 | nbBitsLSB = static_cast<unsigned char>(8*((startBit>>3) + 1) - startBit);
|
|---|
| 1230 | nbBitsMSB = static_cast<unsigned char>(length - nbBitsLSB);
|
|---|
| 1231 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 1232 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 1233 | LSB = data[startBit>>3] & maskLSB;
|
|---|
| 1234 | MSB = data[(startBit>>3) + 1] & maskMSB;
|
|---|
| 1235 |
|
|---|
| 1236 | *result = (unsigned short)((MSB<<8) + (LSB>>(startBit-8*(startBit>>3))));
|
|---|
| 1237 |
|
|---|
| 1238 | return true;
|
|---|
| 1239 | }
|
|---|
| 1240 | }
|
|---|
| 1241 |
|
|---|
| 1242 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1243 | // Little Endian - Intel coding
|
|---|
| 1244 | // gerer le signe
|
|---|
| 1245 | // gerer le depassement sur plus de 2 octets
|
|---|
| 1246 | // verifier le depassement avant cette ligne : if (length == 16)
|
|---|
| 1247 | // manque le decalage
|
|---|
| 1248 | inline bool mobileyeiDecodeToI16(short * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1249 | {
|
|---|
| 1250 | if (length > 16) {
|
|---|
| 1251 | *result = 0;
|
|---|
| 1252 | return false;
|
|---|
| 1253 | }
|
|---|
| 1254 |
|
|---|
| 1255 | if (length == 16) {
|
|---|
| 1256 | // only work if length == 16
|
|---|
| 1257 | unsigned char LSB, MSB;
|
|---|
| 1258 | LSB = data[startBit>>3];
|
|---|
| 1259 | MSB = data[(startBit>>3) + 1];
|
|---|
| 1260 |
|
|---|
| 1261 | short temp = (MSB << 8) + LSB;
|
|---|
| 1262 |
|
|---|
| 1263 | if (temp & 0x8000) {
|
|---|
| 1264 | // do the two's complement to get the signed value
|
|---|
| 1265 | *result = - ( ( (~temp) + 1 ) & 0xFFFF );
|
|---|
| 1266 | } else {
|
|---|
| 1267 | *result = temp;
|
|---|
| 1268 | }
|
|---|
| 1269 | return true;
|
|---|
| 1270 | } else {
|
|---|
| 1271 | unsigned char LSB, MSB, maskMSB, maskLSB, nbBitsMSB, nbBitsLSB;
|
|---|
| 1272 |
|
|---|
| 1273 | nbBitsLSB = static_cast<unsigned char>(8*((startBit>>3) + 1) - startBit);
|
|---|
| 1274 | nbBitsMSB = static_cast<unsigned char>(length - nbBitsLSB);
|
|---|
| 1275 | maskLSB = getShiftMask8(8 - nbBitsLSB , nbBitsLSB);
|
|---|
| 1276 | maskMSB = getMask8( nbBitsMSB );
|
|---|
| 1277 | LSB = data[startBit>>3] & maskLSB;
|
|---|
| 1278 | MSB = data[(startBit>>3) + 1] & maskMSB;
|
|---|
| 1279 |
|
|---|
| 1280 | unsigned short temp = (unsigned short)((MSB<<8) + (LSB>>(startBit-8*(startBit>>3))));
|
|---|
| 1281 |
|
|---|
| 1282 | if (temp & getShiftMask16(length-1,1))
|
|---|
| 1283 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 1284 | *result = -1 * ( ( (~temp) + 1 ) & getMask16(length) );
|
|---|
| 1285 | else
|
|---|
| 1286 | *result = temp;
|
|---|
| 1287 | return true;
|
|---|
| 1288 | }
|
|---|
| 1289 | }
|
|---|
| 1290 |
|
|---|
| 1291 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1292 | // Little Endian - Intel coding
|
|---|
| 1293 | // OK
|
|---|
| 1294 | inline bool mobileyeiDecodeToUI8(unsigned char * result,const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1295 | {
|
|---|
| 1296 | if (length>8) { *result = 0; return false; }
|
|---|
| 1297 |
|
|---|
| 1298 | // verify that the frame is not spread in 2 bytes
|
|---|
| 1299 | if (iSpreadOnMoreThan1Byte(startBit, length))
|
|---|
| 1300 | {
|
|---|
| 1301 | // decode in a 16-bit integer
|
|---|
| 1302 | unsigned short temp;
|
|---|
| 1303 | if ( iDecodeToUI16(&temp, data, startBit, length) )
|
|---|
| 1304 | {
|
|---|
| 1305 | // and cast in an 8 bit integer
|
|---|
| 1306 | *result = (unsigned char) temp;
|
|---|
| 1307 | return true;
|
|---|
| 1308 | }
|
|---|
| 1309 | else
|
|---|
| 1310 | {
|
|---|
| 1311 | *result = 0;
|
|---|
| 1312 | return true;
|
|---|
| 1313 | }
|
|---|
| 1314 | }
|
|---|
| 1315 | else // ok data is stored at most in 1 byte
|
|---|
| 1316 | {
|
|---|
| 1317 | unsigned char c;
|
|---|
| 1318 | c = data[startBit>>3];
|
|---|
| 1319 | c >>= (startBit & 0x07);
|
|---|
| 1320 | *result = c & getMask8( length );
|
|---|
| 1321 |
|
|---|
| 1322 | return true;
|
|---|
| 1323 | }
|
|---|
| 1324 |
|
|---|
| 1325 | }
|
|---|
| 1326 |
|
|---|
| 1327 | //////////////////////////////////////////////////////////////////////////
|
|---|
| 1328 | // Little Endian - Intel coding
|
|---|
| 1329 | // OK
|
|---|
| 1330 | inline bool mobileyeiDecodeToI8(char * result, const unsigned char * data, const unsigned int startBit, const unsigned int length)
|
|---|
| 1331 | {
|
|---|
| 1332 | if (length > 8) {
|
|---|
| 1333 | *result = 0;
|
|---|
| 1334 | return false;
|
|---|
| 1335 | }
|
|---|
| 1336 |
|
|---|
| 1337 | // verify that the frame is not spread in 2 bytes
|
|---|
| 1338 | if (iSpreadOnMoreThan1Byte(startBit, length)) {
|
|---|
| 1339 | // decode in a 16-bit integer
|
|---|
| 1340 | short temp;
|
|---|
| 1341 | if ( iDecodeToI16(&temp, data, startBit, length) ) {
|
|---|
| 1342 | // and cast in an 8 bit integer
|
|---|
| 1343 | *result = (char)(temp);
|
|---|
| 1344 | return true;
|
|---|
| 1345 | } else {
|
|---|
| 1346 | *result = 0;
|
|---|
| 1347 | return true;
|
|---|
| 1348 | }
|
|---|
| 1349 | } else {
|
|---|
| 1350 | // ok data is stored at most in 1 byte
|
|---|
| 1351 | char c;
|
|---|
| 1352 | c = data[startBit>>3]; // >>3 <=> div 8
|
|---|
| 1353 | c >>= (startBit & 0x07); // &0x07 <=> modulo 8
|
|---|
| 1354 | c = c & getMask8( length );
|
|---|
| 1355 | if (c & getShiftMask8(length-1,1))
|
|---|
| 1356 | // do the two's complement to get the signed value if the msb=1
|
|---|
| 1357 | *result = - ( ( (~c) + 1 ) & getMask8(length) );
|
|---|
| 1358 | else
|
|---|
| 1359 | *result = c;
|
|---|
| 1360 |
|
|---|
| 1361 | return true;
|
|---|
| 1362 | }
|
|---|
| 1363 | }
|
|---|
| 1364 |
|
|---|
| 1365 | inline int mobileyeDecodeCAN(unsigned char *data,unsigned char bigEndian,unsigned int startBit,unsigned int length,unsigned char Signed)
|
|---|
| 1366 | {
|
|---|
| 1367 | int value;
|
|---|
| 1368 | unsigned short ustemp16 = 0;
|
|---|
| 1369 | unsigned char uctemp8 = 0;
|
|---|
| 1370 | short stemp16 = 0;
|
|---|
| 1371 | char ctemp8 = 0;
|
|---|
| 1372 |
|
|---|
| 1373 | if(bigEndian) {
|
|---|
| 1374 | if(length>8){
|
|---|
| 1375 | if(Signed){mobileyemDecodeToI16(&stemp16,data, startBit, length);value = stemp16;}
|
|---|
| 1376 | else {mobileyemDecodeToUI16(&ustemp16,data, startBit, length);value = ustemp16;}}
|
|---|
| 1377 | else if(Signed) {mobileyemDecodeToI8(&ctemp8,data, startBit, length);value = ctemp8;}
|
|---|
| 1378 | else {mobileyemDecodeToUI8(&uctemp8,data, startBit, length);value = uctemp8;}
|
|---|
| 1379 | } else {
|
|---|
| 1380 | if(length>8){
|
|---|
| 1381 | if(Signed) {mobileyeiDecodeToI16(&stemp16,data, startBit, length);value = stemp16;}
|
|---|
| 1382 | else {mobileyeiDecodeToUI16(&ustemp16,data, startBit, length);value = ustemp16;}}
|
|---|
| 1383 | else if(Signed) {mobileyeiDecodeToI8(&ctemp8,data, startBit, length);value = ctemp8;}
|
|---|
| 1384 | else {mobileyeiDecodeToUI8(&uctemp8,data, startBit, length);value = uctemp8;}
|
|---|
| 1385 | }
|
|---|
| 1386 |
|
|---|
| 1387 | return value;
|
|---|
| 1388 | }
|
|---|
| 1389 |
|
|---|
| 1390 | #ifdef __cplusplus
|
|---|
| 1391 | }
|
|---|
| 1392 | #endif // __cplusplus
|
|---|
| 1393 |
|
|---|
| 1394 | #endif // BINARYDECODER_H
|
|---|
