Added C++ function to set log level

bob/core/cpp/logging.cpp

@@ -140,12 +140,7 @@ bob::core::AutoOutputDevice::AutoOutputDevice()
 bob::core::AutoOutputDevice::AutoOutputDevice(const std::string& configuration)
 : m_device()
 {
-  std::string str(configuration);
-  str.erase(std::remove_if(str.begin(), str.end(), ::isspace), str.end());
-  if (str == "null" || str.size()==0) m_device.reset(new NullOutputDevice);
-  else if (str == "stdout") m_device.reset(new StdoutOutputDevice);
-  else if (str == "stderr") m_device.reset(new StderrOutputDevice);
-  else m_device.reset(new FileOutputDevice(configuration));
+  reset(configuration);
 }
 
 bob::core::AutoOutputDevice::AutoOutputDevice(boost::shared_ptr<OutputDevice> d)
@@ -156,6 +151,16 @@ bob::core::AutoOutputDevice::AutoOutputDevice(boost::shared_ptr<OutputDevice> d)
 bob::core::AutoOutputDevice::~AutoOutputDevice() {
 }
 
+void bob::core::AutoOutputDevice::reset(const std::string& configuration)
+{
+  std::string str(configuration);
+  str.erase(std::remove_if(str.begin(), str.end(), ::isspace), str.end());
+  if (str == "null" || str.size()==0) m_device.reset(new NullOutputDevice);
+  else if (str == "stdout") m_device.reset(new StdoutOutputDevice);
+  else if (str == "stderr") m_device.reset(new StderrOutputDevice);
+  else m_device.reset(new FileOutputDevice(configuration));
+}
+
 std::streamsize bob::core::AutoOutputDevice::write(const char* s, std::streamsize n) {
   return m_device->write(s, n);
 }
@@ -168,3 +173,10 @@ boost::iostreams::stream<bob::core::AutoOutputDevice> bob::core::debug("stdout")
 boost::iostreams::stream<bob::core::AutoOutputDevice> bob::core::info("stdout");
 boost::iostreams::stream<bob::core::AutoOutputDevice> bob::core::warn("stderr");
 boost::iostreams::stream<bob::core::AutoOutputDevice> bob::core::error("stderr");
+
+void bob::core::log_level(bob::core::LOG_LEVEL level){
+  bob::core::debug->reset(level == DEBUG ?  "stdout" : "null");
+  bob::core::info->reset(level >= INFO && level < DISABLE ?  "stdout" : "null");
+  bob::core::warn->reset(level >= WARNING && level < DISABLE ?  "stderr" : "null");
+  bob::core::error->reset(level >= ERROR && level < DISABLE ?  "stderr" : "null");
+}

bob/core/include/bob.core/logging.h

@@ -80,6 +80,13 @@ namespace bob { namespace core {
        */
       AutoOutputDevice(boost::shared_ptr<OutputDevice> device);
 
+      /**
+       * @brief Updates with the given configuration;
+       * see constructor documentation for supported values
+      */
+      void reset(const std::string& configuration);
+
+
       /**
        * @brief D'tor
        */
@@ -118,6 +125,24 @@ namespace bob { namespace core {
    */
   bool debug_level(unsigned int i);
 
+
+  /** enum defining levels of logs in C++;
+  they are the same as in the Python bindings, except for DISABLE, which is None in Python*/
+  typedef enum {
+    ERROR = 0, // only errors are printed
+    WARNING = 1, // errors and warnings are printed
+    INFO = 2, // errors, warnings and info messages are printed
+    DEBUG = 3, // all messages are printed
+    DISABLE = 9 // no message is printed
+  } LOG_LEVEL;
+
+  /**
+   * brief This method will set up our default log streams to the given log level
+   *
+   * warning: This function should only be used in pure C++ code, as Python uses its own log level handling
+  */
+  void log_level(LOG_LEVEL level=DEBUG);
+
 }}
 
 //returns the current location where the message is being printed