text: #include "config.h"
  
  #include <stdio.h>
  #include <string.h>
  #include <stdlib.h>
  
  #include "../json.h"
  #include "parse_flags.h"
  
  #if !defined(HAVE_STRCASECMP)
  # error You do not have strcasecmp on your system.
  #endif /* HAVE_STRNCASECMP */
  
  static struct {
      const char *arg;
      int flag;
  } format_args[] = {
      { "plain", FJSON_TO_STRING_PLAIN },
      { "spaced", FJSON_TO_STRING_SPACED },
      { "pretty", FJSON_TO_STRING_PRETTY },
  };
  
  #ifndef NELEM
  #define NELEM(x) (sizeof(x) / sizeof(&x[0]))
  #endif
  
  int parse_flags(int argc, char **argv)
  {
      int arg_idx;
      int sflags = 0;
      for (arg_idx = 1; arg_idx < argc ; arg_idx++)
      {
          int jj;
          for (jj = 0; jj < (int)NELEM(format_args); jj++)
          {
              if (strcasecmp(argv[arg_idx], format_args[jj].arg) == 0)
              {
                  sflags |= format_args[jj].flag;
                  break;
              }
          }
          if (jj == NELEM(format_args))
          {
              printf("Unknown arg: %s\n", argv[arg_idx]);
              exit(1);
          }
      }
      return sflags;
  }
  