Rev 393 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 391 | Brean | 1 | #include <Parser.h> |
| 2 | |||
| 3 | // Base64 Decoder |
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| 4 | // see Parser.h for details about sRxData |
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| 5 | void Parser::decode64(sRxData &rx, unsigned int length) |
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| 6 | { |
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| 7 | unsigned char a,b,c,d; |
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| 8 | unsigned char ptr = 0; |
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| 9 | unsigned char x,y,z; |
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| 10 | int ptrOut[150]; |
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| 11 | |||
| 12 | int ptrIn = 3; |
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| 13 | int max = length; |
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| 14 | int len = length; |
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| 15 | int decLen = 0; |
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| 16 | |||
| 17 | if (rx.Input[ptrIn] == 0) { |
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| 18 | throw "Nothing received"; |
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| 19 | } |
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| 20 | |||
| 21 | while(len != 0) { |
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| 22 | a = RX.input[ptrIn++] - '='; |
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| 23 | b = RX.input[ptrIn++] - '='; |
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| 24 | c = RX.input[ptrIn++] - '='; |
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| 25 | d = RX.input[ptrIn++] - '='; |
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| 26 | |||
| 27 | if(ptrIn > max - 2) break; |
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| 28 | |||
| 29 | x = (a << 2) | (b >> 4); |
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| 30 | y = ((b & 0x0f) << 4) | (c >> 2); |
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| 31 | z = ((c & 0x03) << 6) | d; |
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| 32 | |||
| 33 | if(len--) ptrOut[ptr++] = x; else break; |
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| 34 | if(len--) ptrOut[ptr++] = y; else break; |
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| 35 | if(len--) ptrOut[ptr++] = z; else break; |
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| 36 | } |
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| 37 | |||
| 38 | for (int a=0; a<ptr; a++) { |
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| 39 | if (Long == false) { |
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| 40 | int b1, b2, b3; |
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| 41 | |||
| 42 | b1 = ptrOut[a++]; |
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| 43 | b2 = ptrOut[a]; |
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| 44 | |||
| 45 | b3 = (b2 << 8) | b1; |
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| 46 | |||
| 47 | if (b3 > 32767) |
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| 48 | b3 = b3 - 65536; |
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| 49 | |||
| 50 | RX.decode[DecLen] = b3; |
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| 51 | DecLen++; |
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| 52 | } else { |
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| 53 | RX.decode[DecLen] = ptrOut[a]; |
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| 54 | DecLen++; |
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| 55 | } |
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| 56 | RX.DecLen = DecLen; |
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| 57 | } |
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| 58 | } |
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| 59 | |||
| 60 | // base64 encoder |
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| 61 | string Parser::encode64(char data[150],unsigned int length) |
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| 62 | { |
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| 63 | unsigned int pt = 0; |
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| 64 | unsigned char a,b,c; |
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| 65 | unsigned char ptr = 0; |
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| 66 | |||
| 67 | char tx_buff[150]; |
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| 68 | |||
| 69 | while(Length > 0) |
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| 70 | { |
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| 71 | if(Length) { a = data[ptr++]; length--;} else a = 0; |
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| 72 | if(Length) { b = data[ptr++]; length--;} else b = 0; |
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| 73 | if(Length) { c = data[ptr++]; length--;} else c = 0; |
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| 74 | |||
| 75 | tx_buff[pt++] = '=' + (a >> 2); |
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| 76 | tx_buff[pt++] = '=' + (((a & 0x03) << 4) | ((b & 0xf0) >> 4)); |
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| 77 | tx_buff[pt++] = '=' + (((b & 0x0f) << 2) | ((c & 0xc0) >> 6)); |
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| 78 | tx_buff[pt++] = '=' + ( c & 0x3f); |
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| 79 | } |
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| 80 | tx_buff[pt] = 0; |
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| 81 | |||
| 82 | return string(tx_buff); |
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| 83 | } |
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| 84 | |||
| 85 | // Datensatz nach 8bit Integer |
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| 86 | int Parser::dataToChar(int *data , int start, bool is_signed) { |
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| 87 | int out = (data[start]); |
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| 88 | |||
| 89 | if ((out > 128) && (is_signed)) |
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| 90 | out = out - 256; |
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| 91 | |||
| 92 | return out; |
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| 93 | } |
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| 94 | |||
| 95 | // received char to 8 bit integer |
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| 96 | int Parser::charToData(int data) { |
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| 97 | if (data < 0) |
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| 98 | return data + 256; |
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| 99 | return data; |
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| 100 | } |
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| 101 | |||
| 102 | // convert data to 16bit Integer |
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| 103 | int Parser::dataToInt(int *Data , int Start, bool is_signed) |
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| 104 | { |
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| 105 | int Out = (Data[Start+1]<<8) | (Data[Start+0]); |
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| 106 | |||
| 107 | if ((Out > 32767) && (is_signed)) |
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| 108 | Out = Out - 65536; |
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| 109 | |||
| 110 | return Out; |
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| 111 | |||
| 112 | } |
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| 113 | |||
| 114 | // convert data to 32bit Long |
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| 115 | long Parser::dataToLong(int *Data , int Start, bool is_signed) |
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| 116 | { |
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| 117 | long Out = (Data[Start+3]<<24) | (Data[Start+2]<<16) | (Data[Start+1]<<8) | (Data[Start+0]); |
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| 118 | |||
| 119 | if ((Out > 32767) && (is_signed)) |
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| 120 | Out = Out; |
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| 121 | |||
| 122 | return Out; |
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| 123 | } |
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| 124 | |||
| 125 | float Parser::getFloat(long value, int count) |
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| 126 | { |
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| 127 | long num = math.pow(10, count); |
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| 128 | |||
| 129 | float temp = value; |
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| 130 | |||
| 131 | return value / num; |
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| 132 | } |
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| 133 | |||
| 134 | string Parser::dataToString(int Data[150], int Start, int End) |
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| 135 | { |
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| 136 | char String[150]; |
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| 137 | for (int a = Start; a < End; a++) |
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| 138 | { |
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| 139 | String[a - Start] = Data[a]; |
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| 140 | } |
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| 141 | String[End - Start] = '\0'; |
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| 142 | |||
| 143 | return string(String); |
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| 144 | } |
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| 145 | |||
| 146 | // check CRC |
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| 147 | bool Parser::check_CRC(char * RX, int length) |
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| 148 | { |
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| 149 | int CRC = 0; |
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| 150 | char *RX; |
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| 151 | |||
| 152 | if (RX[1] == 127) |
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| 153 | { |
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| 154 | RX[1] = 0; |
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| 155 | } |
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| 156 | |||
| 157 | for(int i=0; i < length-2; i++) |
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| 158 | { |
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| 159 | CRC+=RX[i]; |
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| 160 | } |
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| 161 | |||
| 162 | CRC = CRC % 4096; |
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| 163 | |||
| 164 | if(RX[length - 2] != ('=' + (CRC / 64))) |
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| 165 | { |
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| 166 | return false; |
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| 167 | } |
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| 168 | |||
| 169 | if(RX[length - 1] != ('=' + CRC % 64)) |
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| 170 | { |
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| 171 | return false; |
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| 172 | } |
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| 173 | |||
| 174 | return true; |
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| 175 | } |
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| 176 | |||
| 177 | // add CRC |
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| 178 | string Parser::add_CRC(char * TX, int length) |
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| 179 | { |
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| 180 | unsigned int tmpCRC = 0; |
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| 181 | |||
| 182 | char CRC[2]; |
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| 183 | |||
| 184 | for(int i = 0; i < length; i++) |
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| 185 | { |
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| 186 | tmpCRC += TX[i]; |
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| 187 | } |
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| 188 | |||
| 189 | tmpCRC %= 4096; |
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| 190 | |||
| 191 | CRC[0] = '=' + tmpCRC / 64; |
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| 192 | CRC[1] = '=' + tmpCRC % 64; |
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| 193 | CRC[2] = '\0'; |
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| 194 | |||
| 195 | return string(TX) + string(CRC); |
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| 196 | } |
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| 197 |