shl: misc: add shl_string_list_count() helper

This helper counts the entries in a string-list with an option to ignore
empty elements.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

diff --git a/src/shl_misc.h b/src/shl_misc.h
index f53beae..e6354bc 100644 (file)
--- a/src/shl_misc.h
+++ b/src/shl_misc.h
@@ -200,6 +200,20 @@ static inline bool shl_string_list_is(char **list, const char *entry)
        return !strcmp(list[0], entry);
 }
 
+static inline unsigned int shl_string_list_count(char **list, bool ignore_empty)
+{
+       unsigned int num;
+
+       if (!list)
+               return 0;
+
+       for (num = 0; *list; ++list)
+               if (**list || !ignore_empty)
+                       ++num;
+
+       return num;
+}
+
 /* TODO: xkbcommon should provide these flags!
  * We currently copy them into each library API we use so we need  to keep
  * them in sync. Currently, they're used in uterm-input and tsm-vte. */