libcamera: utils: Add alignUp and alignDown functions

Add to libcamera utils library two functions to round up or down a
value to an alignment and add a test in test/utils.cpp for the two
new functions.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/test/utils.cpp b/test/utils.cpp
index f482e6a1..08f29389 100644
--- a/test/utils.cpp
+++ b/test/utils.cpp
@@ -166,6 +166,17 @@ protected:
 			return TestFail;
 		}
 
+		/* utils::alignUp() and utils::alignDown() tests. */
+		if (utils::alignDown(6, 3) != 6 || utils::alignDown(7, 3) != 6) {
+			cerr << "utils::alignDown test failed" << endl;
+			return TestFail;
+		}
+
+		if (utils::alignUp(6, 3) != 6 || utils::alignUp(7, 3) != 9) {
+			cerr << "utils::alignUp test failed" << endl;
+			return TestFail;
+		}
+
 		return TestPass;
 	}
 };