Validate axes and led labels correctly

Before this CL, a number of checks for kl file validity were incorrect.
Some of the APIs were supposed to return an invalid value, but instead
were always returning a valid value, no matter what the input was.

Correct these values by switching to std::optional.

Bug: 266400536
Test: m libinput_tests && adb sync data && adb shell -t /data/nativetest64/libinput_tests/libinput_tests
Change-Id: I4ef45f3249dca4f4f033fb85e9fecbc2ad1f1395

1 files changed, 2 insertions, 2 deletions

diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index c356c2e5e9..133b260a61 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -299,7 +299,7 @@ const char* KeyEvent::getLabel(int32_t keyCode) {
     return InputEventLookup::getLabelByKeyCode(keyCode);
 }
 
-int32_t KeyEvent::getKeyCodeFromLabel(const char* label) {
+std::optional<int> KeyEvent::getKeyCodeFromLabel(const char* label) {
     return InputEventLookup::getKeyCodeByLabel(label);
 }
 
@@ -891,7 +891,7 @@ const char* MotionEvent::getLabel(int32_t axis) {
     return InputEventLookup::getAxisLabel(axis);
 }
 
-int32_t MotionEvent::getAxisFromLabel(const char* label) {
+std::optional<int> MotionEvent::getAxisFromLabel(const char* label) {
     return InputEventLookup::getAxisByLabel(label);
 }