Sensor Objects
This includes all the sensor objects including a few
implementations, including dbus and sysfs sensors.
Change-Id: I9897c79f9fd463f00f0e02aeb6c32ffa89635dbe
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/sysfs/util.cpp b/sysfs/util.cpp
new file mode 100644
index 0000000..c297412
--- /dev/null
+++ b/sysfs/util.cpp
@@ -0,0 +1,71 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <experimental/filesystem>
+#include <iostream>
+#include <string>
+
+
+#include "sysfs/util.hpp"
+
+/*
+ * There are two basic paths I want to support:
+ * 1. /sys/class/hwmon/hwmon0/pwm1
+ * 2. /sys/devices/platform/ahb/1e786000.pwm-tacho-controller/hwmon/<asterisk asterisk>/pwm1
+ *
+ * In this latter case, I want to fill in that gap. Assuming because it's this
+ * path that it'll only have one directory there.
+ */
+
+static constexpr auto platform = "/sys/devices/platform/";
+namespace fs = std::experimental::filesystem;
+
+
+std::string FixupPath(std::string original)
+{
+ std::string::size_type n, x;
+
+ /* TODO: Consider the merits of using regex for this. */
+ n = original.find("**");
+ x = original.find(platform);
+
+ if ((n != std::string::npos) && (x != std::string::npos))
+ {
+ /* This path has some missing pieces and we support it. */
+ std::string base = original.substr(0, n);
+ std::string fldr;
+ std::string f = original.substr(n + 2, original.size() - (n + 2));
+
+ /* Equivalent to glob and grab 0th entry. */
+ for (const auto& folder : fs::directory_iterator(base))
+ {
+ fldr = folder.path();
+ break;
+ }
+
+ if (!fldr.length())
+ {
+ return original;
+ }
+
+ return fldr + f;
+ }
+ else
+ {
+ /* It'll throw an exception when we use it if it's still bad. */
+ return original;
+ }
+}