use own namespace

src/lib/ebus/symbol.h

@@ -27,8 +27,6 @@
 #include <vector>
 #include "result.h"
 
-using namespace std;
-
 /** @file symbol.h
  * Classes, functions, and constants related to symbols on the eBUS.
  *
@@ -65,6 +63,11 @@ using namespace std;
  * non-acknowledge, the receiving slave has to repeat its data once.
  */
 
+namespace ebusd {
+
+using std::string;
+using std::vector;
+
 static const unsigned char ESC = 0xA9;       //!< escape symbol, either followed by 0x00 for the value 0xA9, or 0x01 for the value 0xAA
 static const unsigned char SYN = 0xAA;       //!< synchronization symbol
 static const unsigned char ACK = 0x00;       //!< positive acknowledge
@@ -257,4 +260,6 @@ unsigned char getMasterNumber(unsigned char addr);
  */
 bool isValidAddress(unsigned char addr, bool allowBroadcast = true);
 
+} // namespace ebusd
+
 #endif // LIB_EBUS_SYMBOL_H_