mraa.c: Added init platform from json file

Signed-off-by: Houman Brinjcargorabi <houman.brinjcargorabi@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

api/mraa/common.h

@@ -44,6 +44,7 @@
                                       if (res != MRAA_SUCCESS) \
                                       return res;} while(0)
 
+
 /** @file
  *
  * This file defines the basic shared values for libmraa
@@ -306,6 +307,16 @@ mraa_result_t mraa_remove_subplatform(mraa_platform_t subplatformtype);
  */
 void* mraa_init_io(const char* desc);
 
+/**
+ * Instantiate an unknown board using a json file
+ *
+ * @param Path to the json file, relative to the folder the program
+ * was initially run in or a direct path
+ *
+ * @return mraa_result indicating success
+ */
+mraa_result_t mraa_init_json_platform(const char* path);
+
 #ifdef __cplusplus
 }
 #endif

api/mraa/common.hpp

@@ -327,4 +327,18 @@ initIo(std::string desc)
     return new T(mraa_init_io(desc.c_str()));
 }
 
+/**
+ * Instantiate an unknown board using a json file
+ *
+ * @param Path to the json file, relative to the folder the program
+ * was initially run in or a direct path
+ *
+ * @return Result indicating success
+ */
+inline Result
+initJsonPlatform(std::string path)
+{
+    return (Result) mraa_init_json_platform(path.c_str());
+}
+
 }