proplib/prop_read_array_.c

   1 /*
   2  * Compile with:
   3  * gcc prop_read_array.c -o prop_read_array -lprop -Wall -W -Wextra -ansi -pedantic
   4  */
   5
   6 #include <err.h>
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <prop/proplib.h>
  10
  11 int main(int argc, char *argv[])
  12 {
  13     prop_array_t pa;
  14     prop_object_t po;
  15     prop_object_iterator_t pit;
  16     unsigned int i;
  17     const char *s;
  18
  19     /* No effect in NetBSD, but increases portability */
  20     setprogname(argv[0]);
  21
  22     /* Check argument count */
  23     if (argc != 2) {
  24         fprintf(stderr, "Usage: %s <data.xml>\n", getprogname());
  25         exit(EXIT_FAILURE);
  26     }
  27
  28     /* Read array contents from external XML file */
  29     pa = prop_array_internalize_from_file(argv[1]);
  30     if (pa == NULL)
  31         err(EXIT_FAILURE, "prop_array_internalize_from_file()");
  32
  33     /* Skim through every item of the array */
  34     for (i = 0; i < prop_array_count(pa); i++) {
  35         /* Get the object stored at the i-th array index */
  36         po = prop_array_get(pa, i);
  37
  38         /* Just a sanity check */
  39         if (prop_object_type(po) != PROP_TYPE_STRING) {
  40             prop_object_release(pa);
  41             errx(EXIT_FAILURE, "invalid string type");
  42         }
  43
  44         s = prop_string_cstring_nocopy(po);
  45         printf("%s\n", s);
  46     }
  47
  48     /*
  49      * We will now iterate through the items of the array,
  50      * but this time we will exploit a prop_array_iterator_t
  51      */
  52     pit = prop_array_iterator(pa);
  53     if (pit == NULL) {
  54         prop_object_release(pa);
  55         err(EXIT_FAILURE, "prop_array_iterator()");
  56     }
  57
  58     /* Traverse */
  59     while((po = prop_object_iterator_next(pit)) != NULL) {
  60         s = prop_string_cstring_nocopy(po);
  61         printf("%s\n", s);
  62     }
  63
  64     /* Release objects */
  65     prop_object_release(pa);
  66     prop_object_iterator_release(pit);
  67
  68     return EXIT_SUCCESS;
  69 }