Allow resetting the logger back to default (#55)

cscore.def

@@ -84,3 +84,4 @@ CS_SetCameraWhiteBalanceManual @81
 CS_SetCameraExposureAuto @82
 CS_SetCameraExposureHoldCurrent @83
 CS_SetCameraExposureManual @84
+CS_SetDefaultLogger @85

include/cscore_c.h

@@ -345,6 +345,7 @@ int CS_NotifierDestroyed(void);
 typedef void (*CS_LogFunc)(unsigned int level, const char* file,
                            unsigned int line, const char* msg);
 void CS_SetLogger(CS_LogFunc func, unsigned int min_level);
+void CS_SetDefaultLogger(unsigned int min_level);
 
 //
 // Utility Functions

include/cscore_cpp.h

@@ -311,6 +311,7 @@ typedef std::function<void(unsigned int level, const char* file,
                            unsigned int line, const char* msg)>
     LogFunc;
 void SetLogger(LogFunc func, unsigned int min_level);
+void SetDefaultLogger(unsigned int min_level);
 
 //
 // Utility Functions

src/Log.cpp

@@ -61,6 +61,8 @@ static void def_log_func(unsigned int level, const char* file,
 #endif
 }
 
-Logger::Logger() { SetLogger(def_log_func); }
+Logger::Logger() { SetDefaultLogger(); }
 
 Logger::~Logger() {}
+
+void Logger::SetDefaultLogger() { SetLogger(def_log_func); }

src/Log.h

@@ -21,6 +21,8 @@ class Logger : public wpi::Logger {
   }
   ~Logger();
 
+  void SetDefaultLogger();
+
  private:
   Logger();
 

src/cscore_c.cpp

@@ -299,6 +299,10 @@ void CS_SetLogger(CS_LogFunc func, unsigned int min_level) {
   cs::SetLogger(func, min_level);
 }
 
+void CS_SetDefaultLogger(unsigned int min_level) {
+  cs::SetDefaultLogger(min_level);
+}
+
 CS_Source* CS_EnumerateSources(int* count, CS_Status* status) {
   llvm::SmallVector<CS_Source, 32> buf;
   auto handles = cs::EnumerateSourceHandles(buf, status);

src/cscore_cpp.cpp

@@ -592,6 +592,12 @@ void SetLogger(LogFunc func, unsigned int min_level) {
   logger.set_min_level(min_level);
 }
 
+void SetDefaultLogger(unsigned int min_level) {
+  Logger& logger = Logger::GetInstance();
+  logger.SetDefaultLogger();
+  logger.set_min_level(min_level);
+}
+
 //
 // Utility Functions
 //