X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fsystemd%2Fsd-id128.h;h=9f445278bbf6481399ca9c16d736893bd46c00f6;hb=e777ddfd71f3b2d3217ffe74f287388832915d0b;hp=4fdbf3ab41be6e2a0fa50d58c1306cbfc201aea3;hpb=10b17992ee59ac1d03d6fc210a976bc2b59f6d75;p=elogind.git

diff --git a/src/systemd/sd-id128.h b/src/systemd/sd-id128.h
index 4fdbf3ab4..9f445278b 100644
--- a/src/systemd/sd-id128.h
+++ b/src/systemd/sd-id128.h
@@ -60,7 +60,7 @@ int sd_id128_get_boot(sd_id128_t *ret);
 
 /* Note that SD_ID128_FORMAT_VAL will evaluate the passed argument 16
  * times. It is hence not a good idea to call this macro with an
- * expensive function as paramater or an expression with side
+ * expensive function as parameter or an expression with side
  * effects */
 
 #define SD_ID128_FORMAT_STR "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
@@ -106,6 +106,10 @@ _sd_pure_ static inline int sd_id128_equal(sd_id128_t a, sd_id128_t b) {
         return memcmp(&a, &b, 16) == 0;
 }
 
+_sd_pure_ static inline int sd_id128_is_null(sd_id128_t a) {
+        return a.qwords[0] == 0 && a.qwords[1] == 0;
+}
+
 #define SD_ID128_NULL ((const sd_id128_t) { .qwords = { 0, 0 }})
 
 _SD_END_DECLARATIONS;