extern void pulse_mode_end (void);
extern void pulse_mode_cancel (void);
+/* Return true iff the buffer is all zero bytes.
+ *
+ * Note that gcc is smart enough to optimize this properly:
+ * http://stackoverflow.com/questions/1493936/faster-means-of-checking-for-an-empty-buffer-in-c/1493989#1493989
+ */
+static inline int
+is_zero (const char *buffer, size_t size)
+{
+ size_t i;
+
+ 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.
*/