livedisplay: sysfs: Wire it up

Change-Id: I8e8e222f94bcf86d4ded3d8dc57cc6c70ee7634a

1 files changed, 24 insertions, 11 deletions

diff --git a/sysfs/AutoContrast.cpp b/sysfs/AutoContrast.cpp
index 522014c..906f6a1 100644
--- a/sysfs/AutoContrast.cpp
+++ b/sysfs/AutoContrast.cpp
@@ -14,32 +14,45 @@
  * limitations under the License.
  */
 
+#include <android-base/file.h>
+#include <android-base/strings.h>
+
+#include <fstream>
+
 #include "AutoContrast.h"
 
+using android::base::ReadFileToString;
+using android::base::Trim;
+using android::base::WriteStringToFile;
+
 namespace vendor {
 namespace lineage {
 namespace livedisplay {
 namespace V2_0 {
 namespace sysfs {
 
+bool AutoContrast::isSupported() {
+    std::fstream aco(FILE_ACO, aco.in | aco.out);
+
+    return aco.good();
+}
+
 // Methods from ::vendor::lineage::livedisplay::V2_0::IAutoContrast follow.
 Return<bool> AutoContrast::isEnabled() {
-    // TODO implement
-    return bool {};
+    std::string tmp;
+    int32_t contents = 0;
+
+    if (ReadFileToString(FILE_ACO, &tmp)) {
+        contents = std::stoi(Trim(tmp));
+    }
+
+    return contents > 0;
 }
 
 Return<bool> AutoContrast::setEnabled(bool enabled) {
-    // TODO implement
-    return bool {};
+    return WriteStringToFile(enabled ? "1" : "0", FILE_ACO, true);
 }
 
-
-// Methods from ::android::hidl::base::V1_0::IBase follow.
-
-//IAutoContrast* HIDL_FETCH_IAutoContrast(const char* /* name */) {
-    //return new AutoContrast();
-//}
-//
 }  // namespace sysfs
 }  // namespace V2_0
 }  // namespace livedisplay