Replace "none" with macro

String "none" is used many times throughout the code.
Replace "none" strings with predefined macro.

Add str_is_none() for comparing strings with "none".
Replace str(n)cmp calls with function.

Signed-off-by: Mateusz Kusiak <mateusz.kusiak@intel.com>
Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index 46692730..709b6104 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -2027,3 +2027,19 @@ static inline int is_container(const int level)
 		return 1;
 	return 0;
 }
+
+#define STR_COMMON_NONE "none"
+
+/**
+ * str_is_none() - check if @str starts with "none".
+ * @str: string
+ *
+ * return:
+ * true if string starts with "none", false otherwise.
+ */
+static inline bool str_is_none(char *str)
+{
+	if (strncmp(str, STR_COMMON_NONE, sizeof(STR_COMMON_NONE) - 1) == 0)
+		return true;
+	return false;
+}