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cern_gem_daq's Issues

How to generate a valid JSON?

I generated a JSON as follows:

Modify the source:

diff --git a/Test_PostgreSQL/code/generate_json_sample.cpp b/Test_PostgreSQL/code/generate_json_sample.cpp
index 2d8cbbf..e54f29c 100644
--- a/Test_PostgreSQL/code/generate_json_sample.cpp
+++ b/Test_PostgreSQL/code/generate_json_sample.cpp
@@ -55,7 +55,7 @@ int main()
        cout<<final_fields.size()<<endl;
        fstream sample_file("Sample_JSON.json", ios::app);
 
-       //sample_file<<"{"<<endl;
+       sample_file<<"{"<<endl;
        //needed only for the first batch of data generation
 
        string inv_comma = "\"";
@@ -63,7 +63,7 @@ int main()
 
        srand(time(0));
 
-       for(int i = 20000; i<=20000; i++)
+       for(int i = 0; i<20000; i++)
        {
                cout<<"Data record no. "<<i<<" being generated"<<endl;

Compile and run:

louis@xxx ~/Work/GEM/CERN_GEM_DAQ/Test_PostgreSQL/code $ g++ generate_json_sample.cpp
louis@xxx ~/Work/GEM/CERN_GEM_DAQ/Test_PostgreSQL/code $ ./a.out 
Fields have been obtained correctly!
Generating configurations into a JSON file
49
Data record no. 0 being generated
Data record no. 1 being generated
Data record no. 2 being generated
Data record no. 3 being generated
Data record no. 4 being generated
Data record no. 5 being generated
...
Data record no. 19997 being generated
Data record no. 19998 being generated
Data record no. 19999 being generated

The output file isn't valid JSON, it's missing commas betweend VFATs:

louis@xxx ~/Work/GEM/CERN_GEM_DAQ/Test_PostgreSQL/code $ json_verify <Sample_JSON.json 
parse error: after key and value, inside map, I expect ',' or '}'
                                        { "v0":{ "CFG_IREF":2764, "CFG
                     (right here) ------^
JSON is invalid

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