proplib/prop_write_array.c

   1 /*
   2  * Compile with:
   3  * gcc prop_write_array.c -o prop_write_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 #define INIT_CAPACITY 10
  12
  13 int
  14 main(int argc, char *argv[])
  15 {
  16     /*
  17      * Declare a pointer to a prop_array object
  18      * Note that prop_array_t is a pointer being
  19      * hidden inside a typedef, i.e.
  20      * typedef struct _prop_array *prop_array_t;
  21      */
  22     prop_array_t pa;
  23     prop_string_t ps;
  24     int i;
  25
  26     /* No effect in NetBSD, but increases portability */
  27     setprogname(argv[0]);
  28
  29     /* Check argument count */
  30     if (argc < 2) {
  31         fprintf(stderr, "Usage: %s data.xml [arguments]\n", getprogname());
  32         exit(EXIT_FAILURE);
  33     }
  34
  35     /*
  36      * Create array object with initial capacity
  37      * set to `INIT_CAPACITY'.
  38      * Note that the array will expand on demand
  39      * by the prop_array_add() with `EXPAND_STEP' step
  40      * as defined in libprop/prop_array.c
  41      */
  42     pa = prop_array_create_with_capacity(INIT_CAPACITY);
  43     if (pa == NULL)
  44         err(EXIT_FAILURE, "prop_array_create_with_capacity()");
  45
  46     /*
  47      * For every argument, create a prop_string_t object
  48      * that references it and store it in the array
  49      */
  50     for (i = 0; i < argc; i++) {
  51         ps = prop_string_create_cstring_nocopy(argv[i]);
  52         if (ps == NULL) {
  53             prop_object_release(pa);
  54             err(EXIT_FAILURE, "prop_string_create_cstring_nocopy()");
  55         }
  56
  57         if (prop_array_add(pa, ps) == false) {
  58             prop_object_release(pa);
  59             prop_object_release(ps);
  60             err(EXIT_FAILURE, "prop_array_add()");
  61         }
  62
  63         prop_object_release(ps);
  64     }
  65
  66     /* Export array contents to file as XML */
  67     if (prop_array_externalize_to_file(pa, argv[1]) == false) {
  68         prop_object_release(pa);
  69         err(EXIT_FAILURE, "prop_array_externalize_to_file()");
  70     }
  71
  72     /* Release array object */
  73     prop_object_release(pa);
  74
  75     return EXIT_SUCCESS;
  76 }