Displaying 2 results from an estimated 2 matches for "4f7433332".
2017 Apr 19
4
[PATCH v2 0/2] daemon: Move the useful 'is_zero' function into common code.
v1 -> v2:
The first patch is the same (the pure refactoring), but in the second
patch I implement Eric Blake's suggested version.
Rich.
2017 Apr 19
2
[PATCH] daemon: Move the useful 'is_zero' function into common code.
...- for (i = 0; i < size; ++i) {
- if (buffer[i] != 0)
- return 0;
- }
-
- return 1;
-}
-
/* Helper for functions that need a root filesystem mounted.
* NB. Cannot be used for FileIn functions.
*/
diff --git a/lib/guestfs-internal-all.h b/lib/guestfs-internal-all.h
index 0c841ff67..4f7433332 100644
--- a/lib/guestfs-internal-all.h
+++ b/lib/guestfs-internal-all.h
@@ -89,6 +89,24 @@
#define xdr_uint32_t xdr_u_int32_t
#endif
+/* Return true iff the buffer is all zero bytes.
+ *
+ * Note that gcc is smart enough to optimize this properly:
+ * http://stackoverflow.com/questions/1493936...