External Camera HAL: Fix prefix length
The length calulation for the string "/dev/video" accidentally added one
instead of removing one for null terminated string. This CL fixes the
misplaced sign to get the correct length.
Test: Manually Tested that the length is correct.
Change-Id: I3e5d0cd7df20afdb2db61ac0963c5580722d8b24
diff --git a/camera/provider/default/ExternalCameraProvider.cpp b/camera/provider/default/ExternalCameraProvider.cpp
index d47ddbf..4d2c847 100644
--- a/camera/provider/default/ExternalCameraProvider.cpp
+++ b/camera/provider/default/ExternalCameraProvider.cpp
@@ -46,7 +46,7 @@
constexpr char kDevicePath[] = "/dev/";
constexpr char kPrefix[] = "video";
constexpr int kPrefixLen = sizeof(kPrefix) - 1;
-constexpr int kDevicePrefixLen = sizeof(kDevicePath) + kPrefixLen + 1;
+constexpr int kDevicePrefixLen = sizeof(kDevicePath) + kPrefixLen - 1;
bool matchDeviceName(int cameraIdOffset, const std::string& deviceName, std::string* deviceVersion,
std::string* cameraDevicePath) {
@@ -379,4 +379,4 @@
} // namespace provider
} // namespace camera
} // namespace hardware
-} // namespace android
\ No newline at end of file
+} // namespace android