include/tt: add tt_is_empty()

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/include/tt.h b/include/tt.h
index 0a16c207539e20a77c67907d640eebcd3f928002..6ae8de3b20fcd17bd55897d7fafbca31ab314973 100644 (file)
--- a/include/tt.h
+++ b/include/tt.h
@@ -93,4 +93,9 @@ extern int tt_line_set_userdata(struct tt_line *ln, void *data);
 extern void tt_fputs_quoted(const char *data, FILE *out);
 extern void tt_fputs_nonblank(const char *data, FILE *out);
 
+static inline int tt_is_empty(struct tt *tb)
+{
+       return !tb || list_empty(&tb->tb_lines);
+}
+
 #endif /* UTIL_LINUX_TT_H */