Use of the C gadget

1. This is a GPS data filtering gadget, the purpose is to filter the GPS data in the non-compliant data, and then converted to JSON data

Requires two gadgets

BERMUDA.C------> Filter certain range of data

GEO2JSON.C------> Convert GPS data to JSON format

Note that you need to establish a connection pipeline between the two files in the executable file

First look at the BERMUDA.C code.

#include <stdio.h>intMain () {floatlatitude; floatlongitude; Charinfo[ the];  while(SCANF ("%f,%f,%79[^\n]", &latitude,&longitude,info) = =3) {                if(Latitude > -&& Latitude < the) {                        if(Longitude >- the&& Longitude <- -) {printf ("%f,%f,%s\n", Latitude,longitude,info); }        }    }        return 0;}

And look at the GEO2JSON.C code.

#include <stdio.h>int  main () {        float  latitude;     float longitude;     Char info[];     int 0 ;    

Puts("data=[");  

 while(SCANF ("%f,%f,%79[^\n]", &latitude,&longitude,info) = =3) {                if(started) printf (", \ n"); Elsestarted =1; if(Latitude <-90.0|| Latitude >90.0) {
STDERR is the standard error output, and when an error occurs, the error is not entered in the standard output file, but is output to the foreground fprintf (stderr,"Invalid Latitude:%f\n", latitude); return 2; }                if(Longitude <-180.0|| Longitude >180.0) {fprintf (stderr,"Invalid Longitude:%f\n", longitude); return 2; } printf ("Latitude:%f, Longitude:%f, Info: '%s '", Latitude,longitude,info); } puts ("\ n]"); return 0;}

Use the terminal to enter the directory of these two files, execute the command compiled into an executable file

GCC bermuda.c-o Geo2json

Then set up the pipeline incoming data input file everywhere to the file Outpu.json

(./bermuda |./geo2json) <spooky.csv> Output.json

The file content of the input file Spooky.csv is

30.685163,-68.137207, type=Yeti28.304380,-74.575195, type=UFO29.132971,-71.136475, type= Ship28.343065,-62.753906, type=Elvis27.868217,-68.005371, type=Goatsucker30.496017,-73.333740, type=Disappearance26.224447,-71.477051, type=UFO29.401320,-66.027832, type= Ship37.879536,-69.477539, type=Elvis22.705256,-68.192139, type=Elvis27.166695,-87.484131, Type=elvis

The final output file Outpu.json content is

data =[Latitude:30.685163, Longitude:-68.137207, Info:'Type=yeti', Latitude:28.304380, Longitude:-74.575195, Info:'Type=ufo', Latitude:29.132971, Longitude:-71.136475, Info:'type=ship', Latitude:27.868217, Longitude:-68.005371, Info:'Type=goatsucker', Latitude:30.496017, Longitude:-73.333740, Info:'type=disappearance', Latitude:26.224447, Longitude:-71.477051, Info:'Type=ufo', Latitude:29.401320, Longitude:-66.027832, Info:'type=ship']

Use of the C gadget