5.1.4.1 Example usage of efi_argp_parse

The small example below shows a program that accepts two options: --count and --verbose, with short versions -c and -v respectively.

     static efi_argp_option_t options = []
       {
         { L"count", 'c', 0, 0, L"Forward direction", L"NUM" },
         { L"verbose", 'v', 0, 0, L"Verbose output", NULL },
         { 0, 0, 0, 't', L"Text to display", L"TEXT" },
         { 0, 0, 0, 0, 0, 0 }
       };
     
     int count = 10;
     int verbose = 0;
     efi_char16_t *text = NULL;
     
     static efi_status_t
     parse (void *data, efi_argp_option_t *opt, efi_char16_t *arg)
     {
         switch (opt->shortarg)
           {
           case 'c':
             count = efi_wstrtoul (arg, NULL, 0);
             break;
           case 'v':
             verbose = 1;
             break;
           }
         switch (opt->key)
           {
           case 't':
             text = arg;
             break;
           }
       return EFI_SUCCESS;
     }
     
     efi_status_t
     efi_main (efi_handle_t image, int argc, efi_char16_t **argv)
     {
       efi_status_t err;
       int i;
     
       err = efi_argp_parse (argc, argv, options, parse, 0);
       if (err)
         return err;
     
       for (i = 0; i < count; i++)
         if (verbose)
           efi_printf (L"%s\n", text);
     
       return EFI_SUCCESS;
     }