Some fixes to timeline_add().

1 files changed, 8 insertions, 0 deletions

diff --git a/xs.h b/xs.h
index fe8d78b..3562070 100644
--- a/xs.h
+++ b/xs.h
@@ -41,6 +41,7 @@ void _xs_destroy(char **var);
 #define xs_debug() kill(getpid(), 5)
 xstype xs_type(const char *data);
 int xs_size(const char *data);
+int xs_is_null(char *data);
 d_char *xs_dup(const char *data);
 d_char *xs_expand(d_char *data, int offset, int size);
 d_char *xs_collapse(d_char *data, int offset, int size);
@@ -185,6 +186,13 @@ int xs_size(const char *data)
 }
 
 
+int xs_is_null(char *data)
+/* checks for null */
+{
+    return !!(data == NULL || xs_type(data) == XSTYPE_NULL);
+}
+
+
 d_char *xs_dup(const char *data)
 /* creates a duplicate of data */
 {