Add initial files for physical LED controller

This daemon uses sysfs entry for a particular LED and then triggers
necessary action. Name and Path of the LED is needed as command line
options to make sure this is genreric implementation.

Change-Id: I3d52f1491fcb6ae8119b399a4d2c6770a3f5db30
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/argument.hpp b/argument.hpp
new file mode 100644
index 0000000..28b2966
--- /dev/null
+++ b/argument.hpp
@@ -0,0 +1,58 @@
+#ifndef __ARGUMENT_H
+#define __ARGUMENT_H
+#include <getopt.h>
+#include <map>
+#include <string>
+
+namespace phosphor
+{
+namespace led
+{
+/** @brief Class - Encapsulates parsing command line options and
+ *                 populating arguments
+ */
+class ArgumentParser
+{
+    public:
+        ArgumentParser() = delete;
+        ~ArgumentParser() = default;
+        ArgumentParser(const ArgumentParser&) = delete;
+        ArgumentParser& operator=(const ArgumentParser&) = delete;
+        ArgumentParser(ArgumentParser&&) = default;
+        ArgumentParser& operator=(ArgumentParser&&) = default;
+
+        /** @brief Contructs Argument object
+         *
+         *  @param argc - the main function's argc passed as is
+         *  @param argv - the main function's argv passed as is
+         *  @return Object constructed
+         */
+        ArgumentParser(int argc, char** argv);
+
+        /** @brief Given a option, returns its argument(optarg) */
+        const std::string& operator[](const std::string& opt);
+
+        /** @brief Displays usage */
+        static void usage(char** argv);
+
+        /** @brief Set to 'true' when an option is passed */
+        static const std::string true_string;
+
+        /** @brief Set to '' when an option is not passed */
+        static const std::string empty_string;
+
+    private:
+        /** @brief Option to argument mapping */
+        std::map<const std::string, std::string> arguments;
+
+        /** @brief Array of struct options as needed by getopt_long */
+        static const option options[];
+
+        /** @brief optstring as needed by getopt_long */
+        static const char* optionstr;
+};
+
+} // namespace led
+} // namespace phosphor
+
+#endif