examples/example2.c

   1 #include "../ctxopt.h"
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <ctype.h>
   6 #include <stdint.h>
   7
   8 /* Utility functions */
   9 /* ***************** */
  10
  11 static void
  12 hexdump(void * mem, int len)
  13 {
  14   uint8_t * data = (uint8_t *)mem;
  15   int       pos  = 0;
  16   while (pos < len)
  17   {
  18     /* Print address */
  19     /* """"""""""""" */
  20     printf("%08x", pos);
  21
  22     /* Print hex bytes */
  23     /* """"""""""""""" */
  24     for (int i = 0; i < 16; i++)
  25     {
  26       if ((i & 7) == 0)
  27         printf(" ");
  28       if (pos + i < len)
  29         printf(" %02x", data[pos + i]);
  30       else
  31         printf("   ");
  32     }
  33
  34     /* Print ASCII bytes */
  35     /* """"""""""""""""" */
  36     printf("  |");
  37     for (int i = 0; i < 16; i++)
  38     {
  39       /* Abort if at end */
  40       if (pos + i >= len)
  41         break;
  42
  43       /* Print if printable */
  44       if (isprint((int)data[pos + i]))
  45         printf("%c", data[pos + i]);
  46       else
  47         printf(".");
  48     }
  49     printf("|\n");
  50     pos += 16;
  51   }
  52 }
  53
  54 /* Callback functions */
  55 /* ****************** */
  56
  57 int
  58 second_action(char * ctx_name, direction status, char * prev_ctx_name,
  59               int nb_data, void ** data)
  60
  61 {
  62   puts("Context action");
  63   puts("==============");
  64   if (ctx_name != NULL)
  65     printf("ctx_name: %s\n", ctx_name);
  66
  67   printf("status:   ");
  68   if (status == entering)
  69   {
  70     puts("entering");
  71     (*(int **)data)[1]++;
  72   }
  73   else
  74   {
  75     puts("exiting");
  76     (*(int **)data)[1]++;
  77   }
  78
  79   if (nb_data > 0)
  80     hexdump(*(int **)data, 3 * sizeof(int));
  81
  82   puts("");
  83 }
  84
  85 void
  86 opt_action(char * ctx_name, char * opt_name, char * param, int nb_values,
  87            char ** values, int nb_opt_data, void ** opt_data, int nb_ctx_data,
  88            void ** ctx_data)
  89 {
  90   int v;
  91
  92   puts("Option action");
  93   puts("=============");
  94   if (ctx_name != NULL)
  95     printf("ctx_name:      %s\n", ctx_name);
  96
  97   if (opt_name != NULL)
  98     printf("opt_name:      %s\n", opt_name);
  99
 100   if (param != NULL)
 101     printf("param:         %s\n", param);
 102
 103   /* Display arguments */
 104   /* """"""""""""""""" */
 105   printf("Values   (%2d): ", nb_values);
 106   for (v = 0; v < nb_values; v++)
 107     printf("%s ", values[v]);
 108   puts("");
 109
 110   /* Decrement the second member of the first context argument */
 111   /* """"""""""""""""""""""""""""""""""""""""""""""""""""""""""*/
 112   if (nb_ctx_data > 0)
 113     (*(int **)ctx_data)[1]--;
 114
 115   /* Display option data */
 116   /* """"""""""""""""""" */
 117   if (nb_opt_data > 0)
 118   {
 119     printf("opt_data (%2d): ", nb_opt_data);
 120     hexdump(*(char **)opt_data, strlen(*(char **)opt_data) + 1);
 121     puts("");
 122   }
 123
 124   /* Display context data */
 125   /* """""""""""""""""""" */
 126   if (nb_ctx_data > 0)
 127   {
 128     printf("ctx_data (%2d):\n", nb_ctx_data);
 129     hexdump(*(int **)ctx_data, 3 * sizeof(int));
 130     puts("");
 131   }
 132 }
 133
 134 /* Program entry */
 135 /* ************* */
 136
 137 int
 138 main(int argc, char * argv[])
 139 {
 140   int     nb_rem_args = 0;    /* Nb of remaining unprocessed arguments. */
 141   char ** rem_args    = NULL; /* Remaining arguments string array.      */
 142
 143   int  ctx_data[] = { 1, 2, 3 };
 144   char opt_data[] = "test";
 145
 146   /* initialize cop */
 147   /* """""""""""""" */
 148   ctxopt_init(argv[0], "stop_if_non_option=0 "
 149                        "allow_abbreviations=1 ");
 150
 151   /* Create new contexts with their allowed options */
 152   /* """""""""""""""""""""""""""""""""""""""""""""" */
 153   ctxopt_new_ctx("first", "[a>second... #<string>...]");
 154   ctxopt_new_ctx("second", "[b>third [#<string>]]");
 155   ctxopt_new_ctx("third", "[c #<string>]");
 156
 157   /* Attach parameters to options */
 158   /* """""""""""""""""""""""""""" */
 159   ctxopt_add_opt_settings(parameters, "a", "-a");
 160   ctxopt_add_opt_settings(parameters, "b", "-b");
 161   ctxopt_add_opt_settings(parameters, "c", "-c");
 162
 163   /* Attach a callback action to the second context */
 164   /* """""""""""""""""""""""""""""""""""""""""""""" */
 165   ctxopt_add_ctx_settings(actions, "second", second_action, &ctx_data, NULL);
 166
 167   /* Attach a callback action to options */
 168   /* """"""""""""""""""""""""""""""""""" */
 169   ctxopt_add_opt_settings(actions, "a", opt_action, NULL);
 170   ctxopt_add_opt_settings(actions, "b", opt_action, &opt_data, NULL);
 171   ctxopt_add_opt_settings(actions, "c", opt_action, NULL);
 172
 173   /* Parse and check the command line options */
 174   /* """""""""""""""""""""""""""""""""""""""" */
 175   ctxopt_analyze(argc - 1, argv + 1, &nb_rem_args, &rem_args);
 176
 177   /* Execute callback actions in sequence */
 178   /* """""""""""""""""""""""""""""""""""" */
 179   ctxopt_evaluate();
 180
 181   /* Print remaining non-arguments if any */
 182   /* """""""""""""""""""""""""""""""""""" */
 183   if (nb_rem_args > 0)
 184   {
 185     int a;
 186
 187     puts("Remaining unparsed command line words");
 188     puts("=====================================");
 189     for (a = 0; a < nb_rem_args; a++)
 190       printf("%s ", rem_args[a]);
 191     puts("");
 192   }
 193
 194   exit(EXIT_SUCCESS);
 195 }