move the nmea2ktoais functions back into our code base.

lib/nmea2ktoais/NMEA0183AISMsg.h

@@ -0,0 +1,97 @@
+/*
+NMEA0183AISMsg.h
+
+Copyright (c) 2019 Ronnie Zeiller, www.zeiller.eu
+Based on the works of Timo Lappalainen NMEA2000 and NMEA0183 Library
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
+Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
+OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+*/
+
+#ifndef _tNMEA0183AISMsg_H_
+#define _tNMEA0183AISMsg_H_
+
+#include <NMEA0183Msg.h>
+#include <string.h>
+#include <time.h>
+#include <bitset>
+#include <stdint.h>
+#include <math.h>
+#include <string>
+
+
+#ifndef AIS_MSG_MAX_LEN
+#define AIS_MSG_MAX_LEN 100  // maximum length of AIS Payload
+#endif
+
+#ifndef AIS_BIN_MAX_LEN
+#define AIS_BIN_MAX_LEN 500  // maximum length of AIS Binary Payload (before encoding to Ascii)
+#endif
+
+#define BITSET_LENGTH 120
+
+class tNMEA0183AISMsg : public tNMEA0183Msg {
+
+  protected:  // AIS-NMEA
+    std::bitset<BITSET_LENGTH> bset;
+    static const char *EmptyAISField;  // 6bits 0      not used yet.....
+    static const char *AsciChar;
+
+    uint16_t iAddPldBin;
+    char Payload[AIS_MSG_MAX_LEN];
+    uint8_t  iAddPld;
+    char talker[4]="VDM";
+    char channel[2]="A";
+    std::bitset<AIS_BIN_MAX_LEN> PayloadBin;
+  public:
+    // Clear message
+    void ClearAIS();
+
+  public:
+    tNMEA0183AISMsg();
+    const char *GetPayloadFix(int &padBits,uint16_t fixLen=168);
+    const char *GetPayload(int &padBits,uint16_t offset=0,uint16_t bitLen=0);
+
+    bool BuildMsg5Part1();
+    bool BuildMsg5Part2();
+    bool InitAis(int max=1,int number=1,int sequence=-1);
+
+    // Generally Used
+    bool AddIntToPayloadBin(int32_t ival, uint16_t countBits);
+    bool AddBoolToPayloadBin(bool &bval);
+    bool AddEncodedCharToPayloadBin(char *sval, size_t Length);
+    /**
+     * @param channelA - if set A, otherwise B
+     * @param own - if set VDO, else VDM
+     */
+    void SetChannelAndTalker(bool channelA,bool own=false);
+    /**
+     * convert the payload to ascii
+     * return the number of padding bits
+     * @param bitSize the number of bits to be used, 0 - use all bits
+     */
+    template  <unsigned int SZ>
+    int ConvertBinaryAISPayloadBinToAscii(std::bitset<SZ> &src,uint16_t maxSize, uint16_t bitSize,uint16_t offset=0);
+
+  // AIS Helper functions
+  protected:
+    inline int32_t aRoundToInt(double x) {
+      return (x >= 0) ? (int32_t) floor(x + 0.5) : (int32_t) ceil(x - 0.5);
+    }
+};
+#endif