misc: Add ssh_list_count()

Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

include/libssh/misc.h

@@ -54,6 +54,7 @@ struct ssh_list *ssh_list_new(void);
 void ssh_list_free(struct ssh_list *list);
 struct ssh_iterator *ssh_list_get_iterator(const struct ssh_list *list);
 struct ssh_iterator *ssh_list_find(const struct ssh_list *list, void *value);
+size_t ssh_list_count(const struct ssh_list *list);
 int ssh_list_append(struct ssh_list *list, const void *data);
 int ssh_list_prepend(struct ssh_list *list, const void *data);
 void ssh_list_remove(struct ssh_list *list, struct ssh_iterator *iterator);

src/misc.c

@@ -397,6 +397,25 @@ struct ssh_iterator *ssh_list_find(const struct ssh_list *list, void *value){
   return NULL;
 }
 
+/**
+ * @brief Get the number of elements in the list
+ *
+ * @param[in]  list     The list to count.
+ *
+ * @return The number of elements in the list.
+ */
+size_t ssh_list_count(const struct ssh_list *list)
+{
+  struct ssh_iterator *it = NULL;
+  int count = 0;
+
+  for (it = ssh_list_get_iterator(list); it != NULL ; it = it->next) {
+      count++;
+  }
+
+  return count;
+}
+
 static struct ssh_iterator *ssh_iterator_new(const void *data){
   struct ssh_iterator *iterator=malloc(sizeof(struct ssh_iterator));
   if(!iterator)

tests/unittests/torture_list.c

@@ -17,6 +17,8 @@ static void torture_ssh_list_new(void **state) {
     assert_true(xlist->root == NULL);
     assert_true(xlist->end == NULL);
 
+    assert_int_equal(ssh_list_count(xlist), 0);
+
     ssh_list_free(xlist);
 }
 
@@ -46,6 +48,8 @@ static void torture_ssh_list_append(void **state) {
     assert_string_equal((const char *) xlist->root->next->next->data, "item3");
     assert_string_equal((const char *) xlist->end->data, "item3");
 
+    assert_int_equal(ssh_list_count(xlist), 3);
+
     ssh_list_free(xlist);
 }
 
@@ -75,6 +79,8 @@ static void torture_ssh_list_prepend(void **state) {
     assert_string_equal((const char *) xlist->root->next->next->data, "item2");
     assert_string_equal((const char *) xlist->end->data, "item2");
 
+    assert_int_equal(ssh_list_count(xlist), 3);
+
     ssh_list_free(xlist);
 }