cli_options.h

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#include <argp.h>
#include <TROOT.h>

#ifndef _PARSER_
#define _PARSER_

static int parse_opt(int key, char* arg, struct argp_state* state);

// -- Global variables
struct argp_option options[] = {
  {"overwrite"      , 'w', 0      , 0, "Overwrite results"},
  {"verbosity"      , 'v', "LEVEL", 0, "Verbosity level [Info, Debug, Trace]"},
  {"input-file"     , 'i', "FILE" , 0, "Input file"},
  {"output-file"    , 'o', "FILE" , 0, "Output file"},
  {"event"          , 'E', "INT"  , 0, "Process Single Event"},
  {"from-event"     , 'e', "INT"  , 0, "Process from Event"},
  {"nevents"        , 'n', "INT"  , 0, "Process # events"},
  {0}
};
struct argp argp = {options, parse_opt, 0, 0};

struct arguments{
  const char* infilename;
  const char* outfilename;
  const char* recotype;
  const char* debug_level;
  bool flag_overwrite;
  bool flag_input;
  bool flag_output;
  int event;
  int from_event;
  int nevents;
};


static int parse_opt(int key, char* arg, struct argp_state* state){

  struct arguments* a = (struct arguments*) state->input;

  switch(key)
  {
    case 'w':
    {
      a->flag_overwrite = kTRUE;
      break;
    }
    case 'v':
    {
      a->debug_level = arg;
      break;
    }
    case 'i':
    {
      a->flag_input = kTRUE;
      a->infilename = arg;
      break;
    }
    case 'o':
    {
      a->flag_output = kTRUE;
      a->outfilename = arg;
      break;
    }
    case 'E':
    {
      a->event = atoi(arg);
      break;
    }
    case 'e':
    {
      a->from_event = atoi(arg);
      break;
    }
    case 'n':
    {
      a->nevents = atoi(arg);
      break;
    }
    case ARGP_KEY_ARG:
    {
      argp_failure(state, 1, 0, "No arguments requested");
      break;
    }
    case ARGP_KEY_INIT:
    {
      a->infilename     = nullptr;
      a->outfilename    = nullptr;
      a->debug_level    = "Info";
      a->flag_overwrite = kFALSE;
      a->flag_input     = kFALSE;
      a->flag_output    = kFALSE;
      a->event          = -1;
      a->from_event     = -1;
      a->nevents        = -1;
      break;
    }
    case ARGP_KEY_END:
    {
      break;
    }
  }

  return 0;

}


#endif