| 1 | /* |
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| 2 | * File: DataPacker.h |
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| 3 | * |
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| 4 | * DataPacker has a single static public method packData(..) that returns the |
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| 5 | * packed data message that is sent to the ATMS Server in the fep_reply struct |
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| 6 | * via RPC. |
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| 7 | * |
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| 8 | * @author John A. Torres |
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| 9 | * @version 9/8/2017 |
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| 10 | */ |
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| 11 | |
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| 12 | #ifndef DATAPACKER_H |
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| 13 | #define DATAPACKER_H |
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| 14 | |
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| 15 | // Include dependencies |
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| 16 | #include "network.h" |
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| 17 | #include <iostream> |
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| 18 | #include <string.h> |
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| 19 | #include <stdio.h> |
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| 20 | |
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| 21 | class DataPacker { |
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| 22 | |
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| 23 | public: |
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| 24 | /** |
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| 25 | * Returns packed data message to be sent to ATMS Server in fep_reply via RPC |
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| 26 | * |
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| 27 | * @param station The station for which the message is to be made |
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| 28 | * @return The packed data message |
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| 29 | */ |
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| 30 | static unsigned char * packData(STATION *station); |
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| 31 | |
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| 32 | private: |
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| 33 | // static message var |
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| 34 | static unsigned char *msg; |
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| 35 | /** |
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| 36 | * Packs the static meta data into the msg |
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| 37 | * |
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| 38 | * @param station station being packed |
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| 39 | * @return the msg |
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| 40 | */ |
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| 41 | unsigned char * staticDataPack(STATION *station); |
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| 42 | /** |
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| 43 | * Packs the dynamic (occ/vol) data into the message |
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| 44 | * |
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| 45 | * @param station the station being packed |
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| 46 | * @param packNo number that specifies which lane types to compare |
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| 47 | * @param pos position in the message (byte number) |
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| 48 | * @return position (int) |
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| 49 | */ |
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| 50 | int dynamicDataPack(STATION *station, int packNo, int pos); |
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| 51 | /** |
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| 52 | * Returns the sum of values from byte 1 (after 0x0D0A) to the second to last byte |
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| 53 | * |
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| 54 | * @param dataptr msg data pointer |
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| 55 | * @param len length of message |
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| 56 | * @return checksum value |
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| 57 | */ |
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| 58 | char chksum(unsigned char *dataptr, int len); |
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| 59 | /** |
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| 60 | * Checks if there is data available at the specified lane |
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| 61 | * @param flag |
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| 62 | * @param num |
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| 63 | * @return bool (is data available) |
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| 64 | */ |
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| 65 | bool DataAvail(char flag, int num); |
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| 66 | /** |
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| 67 | * Convert volume and occupancy data to a two-byte data packet |
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| 68 | * @param vol |
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| 69 | * @param occ |
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| 70 | * @return the volume occupancy two byte data packet struct |
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| 71 | */ |
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| 72 | VOLOCC packVOLOCC(int vol, int occ); |
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| 73 | |
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| 74 | }; |
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| 75 | |
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| 76 | #endif /* DATAPACKER_H */ |
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| 77 | |
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