kopia lustrzana https://github.com/pjalocha/esp32-ogn-tracker
84 wiersze
3.6 KiB
C++
84 wiersze
3.6 KiB
C++
#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "format.h"
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static int APRS2IGC(char *Out, const char *Inp, int GeoidSepar) // convert APRS positon message into IGC B-record
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{ int Len=0;
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const char *Msg = strchr(Inp, ':'); if(Msg==0) return 0; // colon: separates header and message
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Msg++; // where message starts
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if(Msg[0]!='/' || Msg[7]!='h') return 0;
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const char *Pos = Msg+8; if(Pos[4]!='.' || Pos[14]!='.') return 0; // where position starts
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const char *ExtPos = strstr(Pos+18, " !W"); if(ExtPos[5]=='!') ExtPos+=3; else ExtPos=0;
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Out[Len++]='B'; // B-record
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memcpy(Out+Len, Msg+1, 6); Len+=6; // copy UTC time
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memcpy(Out+Len, Pos, 4); Len+=4; // copy DDMM
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memcpy(Out+Len, Pos+5, 2); Len+=2; // copy fractional MM
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Out[Len++] = ExtPos?ExtPos[0]:'0'; // extended precision
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Out[Len++] = Pos[7]; // copy N/S sign
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memcpy(Out+Len, Pos+9, 5); Len+=5; // copy DDMM
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memcpy(Out+Len, Pos+15,2); Len+=2; // copy fractional MM
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Out[Len++] = ExtPos?ExtPos[1]:'0'; // extended precision
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Out[Len++] = Pos[17]; // copy E/W sign
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Out[Len++] = 'A';
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memcpy(Out+Len, " ", 10);
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const char *FL = strstr(Pos+18, " FL");
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if(FL) // pressure altitude
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{ float PressAlt=atof(FL+3); PressAlt*=30.4; int32_t Alt=floor(PressAlt+0.5);
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if(Alt<0) { Alt = (-Alt); Out[Len] = '-'; Format_UnsDec(Out+Len+1, (uint32_t)Alt, 4); }
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else { Format_UnsDec(Out+Len, (uint32_t)Alt, 5); }
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}
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Len+=5;
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if(Pos[27]=='A' && Pos[28]=='=') // geometrical altitude
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{ int32_t Alt=atol(Pos+29); Alt=(Alt*3+5)/10; Alt+=GeoidSepar; // convert to meters and add GeoidSepar for HAE
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if(Alt<0) { Alt = (-Alt); Out[Len] = '-'; Format_UnsDec(Out+Len+1, (uint32_t)Alt, 4); }
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else { Format_UnsDec(Out+Len, (uint32_t)Alt, 5); }
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}
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Len+=5;
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Out[Len]=0; return Len; }
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static int Verbose = 1;
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static int GeoidSepar = 40;
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static FILE *OutFile = 0;
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int main(int argc, char *argv[])
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{ if(argc<3)
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{ printf("Usage: %s <own-aircraft-APRS-call> <input-file.aprs>\n", argv[0]);
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return 0; }
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const char *OwnAcft = argv[1]; int OwnAcftLen = strlen(OwnAcft);
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char OutFileName[32]; strcpy(OutFileName, OwnAcft); strcat(OutFileName, ".IGC");
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OutFile=fopen(OutFileName, "wt");
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if(OutFile==0) { printf("Cannot open %s for write\n", OutFileName); return 0; }
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const char *InpFileName = argv[2];
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FILE *InpFile=fopen(InpFileName, "rt");
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if(InpFile==0) { printf("Cannot open %s for read\n", InpFileName); return 0; }
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char InpLine[256];
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char OutLine[256];
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int InpLines=0;
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int OutLines=0;
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for( ; ; )
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{ if(fgets(InpLine, 256, InpFile)==0) break;
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char *EOL = strchr(InpLine, '\n'); if(EOL==0) break;
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*EOL = 0;
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InpLines++;
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if(memcmp(InpLine, OwnAcft, OwnAcftLen)) continue;
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int OutLen=APRS2IGC(OutLine, InpLine, GeoidSepar);
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if(OutLen>0)
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{ if(Verbose) printf("%s => %s [%d]\n", InpLine, OutLine, OutLen);
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fprintf(OutFile, "%s\n", OutLine); OutLines++; }
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}
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fclose(InpFile);
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printf("%d lines from %s\n", InpLines, InpFileName);
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fclose(OutFile);
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printf("%d lines to %s\n", OutLines, OutFileName);
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return 0; }
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