tools: iio: Add ARRAY_SIZE macro

Calculation of the length of an array can be done with the ARRAY_SIZE
macro to make code more abstract and remove the associated
checkpatch.pl warning.

Signed-off-by: Cristina Opriceana <cristina.opriceana@gmail.com>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

2 files changed, 3 insertions, 1 deletions

diff --git a/tools/iio/iio_utils.c b/tools/iio/iio_utils.c
index 4a7e4801cebf..e177f4022d40 100644
--- a/tools/iio/iio_utils.c
+++ b/tools/iio/iio_utils.c
@@ -39,7 +39,7 @@ int iioutils_break_up_name(const char *full_name, char **generic_name)
         char *working, *prefix = "";
         int i, ret;
 
-        for (i = 0; i < sizeof(iio_direction) / sizeof(iio_direction[0]); i++)
+        for (i = 0; i < ARRAY_SIZE(iio_direction); i++)
                 if (!strncmp(full_name, iio_direction[i],
                              strlen(iio_direction[i]))) {
                         prefix = iio_direction[i];
diff --git a/tools/iio/iio_utils.h b/tools/iio/iio_utils.h
index 086610139ade..f30a1091b53e 100644
--- a/tools/iio/iio_utils.h
+++ b/tools/iio/iio_utils.h
@@ -18,6 +18,8 @@
 #define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
 #define FORMAT_TYPE_FILE "%s_type"
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+
 extern const char *iio_dir;
 
 /**