examples/hello.c

   1 #include "../ctxopt.h"
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 /* Callback functions */
   7 /* ****************** */
   8
   9 void
  10 name_action(char * ctx_name, char * opt_name, char * param, int nb_values,
  11             char ** values, int nb_opt_data, void ** opt_data, int nb_ctx_data,
  12             void ** ctx_data)
  13 {
  14   int v;
  15
  16   printf("Hello %s", values[0]); /* First command line argument after name *
  17                                   | (-n or -name).                         */
  18
  19   for (v = 1; v < nb_values; v++) /* Other command line arguments.         */
  20     printf(", %s", values[v]);
  21
  22   printf(".\n");
  23 }
  24
  25 /* Program entry */
  26 /* ************* */
  27
  28 int
  29 main(int argc, char * argv[])
  30 {
  31   int     nb_rem_args = 0;    /* Nb of remaining unprocessed arguments. */
  32   char ** rem_args    = NULL; /* Remaining arguments string array.      */
  33
  34   /* initialize cop */
  35   /* """""""""""""" */
  36   ctxopt_init(argv[0]);
  37
  38   /* Create a new context with its  allowed options. */
  39   /* """"""""""""""""""""""""""""""""""""""""""""""" */
  40   ctxopt_new_ctx("main", "[name... #<string>...]");
  41
  42   /* Attach parameters to the name option */
  43   /* """""""""""""""""""""""""""""""""""" */
  44   ctxopt_add_opt_settings(parameters, "name", "-n -name");
  45
  46   /* Attach a callback action to the name option */
  47   /* """"""""""""""""""""""""""""""""""""""""""" */
  48   ctxopt_add_opt_settings(actions, "name", name_action, NULL);
  49
  50   /* Parse and check the command line options */
  51   /* """""""""""""""""""""""""""""""""""""""" */
  52   ctxopt_analyze(argc - 1, argv + 1, &nb_rem_args, &rem_args);
  53
  54   /* Manage the remaining non options */
  55   /* """""""""""""""""""""""""""""""" */
  56   if (nb_rem_args > 0)
  57   {
  58     printf("Non-arguments are not allowed.\n");
  59     exit(EXIT_FAILURE);
  60   }
  61
  62   /* Execute the call back actions in sequence */
  63   /* """"""""""""""""""""""""""""""""""""""""" */
  64   ctxopt_evaluate();
  65
  66   /* prints the default messages when there is no command line argument. */
  67   /* """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" */
  68   if (argc == 1)
  69     printf("Hello world.\n");
  70
  71   exit(EXIT_SUCCESS);
  72 }