X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fsystemd%2Fsd-id128.h;h=9f445278bbf6481399ca9c16d736893bd46c00f6;hb=884c10fbec1b8247dc620026b5e1b7a5cac0c2eb;hp=f14efeb28dfe121b3576491a58454922da03b55a;hpb=b28ff39f42877daef31383748fd2f313d7fd67c1;p=elogind.git

diff --git a/src/systemd/sd-id128.h b/src/systemd/sd-id128.h
index f14efeb28..9f445278b 100644
--- a/src/systemd/sd-id128.h
+++ b/src/systemd/sd-id128.h
@@ -29,7 +29,7 @@
 
 _SD_BEGIN_DECLARATIONS;
 
-/* 128 Bit ID APIs. See sd-id128(3) for more information. */
+/* 128-bit ID APIs. See sd-id128(3) for more information. */
 
 typedef union sd_id128 sd_id128_t;
 
@@ -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;