Support full filenames in logs. (#226)

This is helpful for doing cut and paste of filenames when opening.
Also fixed couple of macro parentheses.

Options.cmake

@@ -72,6 +72,17 @@ ELSE()
 ENDIF(USE_G3_DYNAMIC_MAX_MESSAGE_SIZE)
 
 
+# G3LOG_FULL_FILENAME logs full file name instead of short filename.  This makes it
+# easier to copy filenames to open them without needing to search.
+option (G3_LOG_FULL_FILENAME "Log full filename" OFF)
+IF(G3_LOG_FULL_FILENAME)
+   LIST(APPEND G3_DEFINITIONS G3_LOG_FULL_FILENAME)
+   message( STATUS "-DG3_LOG_FULL_FILENAME=ON\t\tShowing full filenames with logs")
+ELSE()
+   message( STATUS "-DG3_LOG_FULL_FILENAME=OFF")
+ENDIF(G3_LOG_FULL_FILENAME)
+
+
 # -DENABLE_FATAL_SIGNALHANDLING=ON   : defualt change the
 # By default fatal signal handling is enabled. You can disable it with this option
 # enumerated in src/stacktrace_windows.cpp 

src/g3log/g3log.hpp

@@ -150,7 +150,7 @@ namespace g3 {
 
 // 'Conditional' stream log
 #define LOG_IF(level, boolean_expression)  \
-   if(true == boolean_expression)  \
+   if(true == (boolean_expression))  \
       if(g3::logLevel(level))  INTERNAL_LOG_MESSAGE(level).stream()
 
 // 'Design By Contract' stream API. For Broken Contracts:
@@ -213,7 +213,7 @@ And here is possible output
 
 // Conditional log printf syntax
 #define LOGF_IF(level,boolean_expression, printf_like_message, ...) \
-   if(true == boolean_expression)                                     \
+   if(true == (boolean_expression))                                     \
       if(g3::logLevel(level))  INTERNAL_LOG_MESSAGE(level).capturef(printf_like_message, ##__VA_ARGS__)
 
 // Design By Contract, printf-like API syntax with variadic input parameters.

src/logmessage.cpp

@@ -127,7 +127,11 @@ namespace g3 {
                           const std::string& function, const LEVELS& level)
       : _timestamp(std::chrono::high_resolution_clock::now())
       , _call_thread_id(std::this_thread::get_id())
+#if defined(G3_LOG_FULL_FILENAME)
+      , _file(file)
+#else
       , _file(splitFileName(file))
+#endif
       , _file_path(file)
       , _line(line)
       , _function(function)