Introducing ErrorCode

The objective of error code class to wrap an integer that may be
returned from a function that may fail for different reasons. Since we
are not able to return values different from 0 in case of error in the
arduino language we need to wrap them into this class and redefine
boolean operator to mantain the same behaviour

Author: andreagilardoni

api/ErrorCodes.h

@@ -0,0 +1,32 @@
+#pragma once
+#include <stdint.h>
+
+namespace arduino {
+
+typedef int_fast32_t error_t;
+
+/* Error Values encoding:
+ * In Arduino an error is represented with the integer value 1, thus every value that is not 1 is considered error.
+ * Errors are generally represented with an int type that may vary in size depending on the platform.
+ * For this reason in this representation error_t type is defined with an integer type with a defined size.
+ */
+enum : error_t {
+    ArduinoError    = 0,
+    ArduinoSuccess  = 1,
+};
+
+class ErrorCode {
+public:
+    constexpr ErrorCode(error_t value): value(value) {}
+    const error_t value;
+
+    inline constexpr operator bool() const {
+        return value == ArduinoSuccess;
+    }
+
+    inline constexpr operator int() const {
+        return value;
+    }
+};
+
+}