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         po = prop_array_get(pa, i);
  36         if (prop_object_type(po) != PROP_TYPE_STRING) {
  37             prop_object_release(pa);
  38             errx(EXIT_FAILURE, "invalid string type");
  39         }
  40         s = prop_string_cstring_nocopy(po);
  41         printf("%s\n", s);
  42     }
  43
  44     /*
  45      * We will now iterate through the items of the array,
  46      * but this time we will exploit a prop_array_iterator_t
  47      */
  48     pit = prop_array_iterator(pa);
  49     if (pit == NULL) {
  50         prop_object_release(pa);
  51         err(EXIT_FAILURE, "prop_array_iterator()");
  52     }
  53
  54     /* Traverse */
  55     while((po = prop_object_iterator_next(pit)) != NULL) {
  56         s = prop_string_cstring_nocopy(po);
  57         printf("%s\n", s);
  58     }
  59
  60     /* Release objects */
  61     prop_object_release(pa);
  62     prop_object_iterator_release(pit);
  63
  64     return EXIT_SUCCESS;
  65 }