Add basic code

[ipdf/code.git] / src / log.h

diff --git a/src/log.h b/src/log.h
new file mode 100644 (file)
index 0000000..0dfedfd
--- /dev/null
+++ b/src/log.h
@@ -0,0 +1,46 @@
+/**
+ * @file log.h
+ * @brief Declaration of functions for printing log messages and/or terminating program after a fatal error
+ */
+
+#ifndef _LOG_H
+#define _LOG_H
+
+#include <cstdio>
+#include <cstdlib>
+#include <string>
+
+inline std::string methodName(const std::string& prettyFunction)
+{
+    size_t colons = prettyFunction.find("::");
+    size_t begin = prettyFunction.substr(0,colons).rfind(" ") + 1;
+    size_t end = prettyFunction.rfind("(") - begin;
+
+    return prettyFunction.substr(begin,end) + "()";
+}
+
+#define __METHOD_NAME__ methodName(__PRETTY_FUNCTION__).c_str()
+
+//#define LOG_SYSLOG
+
+#ifdef LOG_SYSLOG
+       #include <syslog.h>
+#else
+       enum {LOG_EMERG, LOG_ALERT, LOG_CRIT, LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO, LOG_DEBUG};
+#endif //LOG_SYSLOG
+
+//To get around a 'pedantic' C99 rule that you must have at least 1 variadic arg, combine fmt into that.
+#define Log(level, ...) LogEx(level, __METHOD_NAME__, __FILE__, __LINE__, __VA_ARGS__)
+#define Fatal(...) FatalEx(__METHOD_NAME__, __FILE__, __LINE__, __VA_ARGS__)
+
+#define Debug(...) LogEx(LOG_DEBUG, __func__, __FILE__, __LINE__, __VA_ARGS__)
+#define Error(...) LogEx(LOG_ERR, __func__, __FILE__, __LINE__, __VA_ARGS__)
+#define Warn(...) LogEx(LOG_WARN, __func__, __FILE__, __LINE__, __VA_ARGS__)
+
+
+extern void LogEx(int level, const char * funct, const char * file, int line,  ...); // General function for printing log messages to stderr
+extern void FatalEx(const char * funct, const char * file, int line, ...); // Function that deals with a fatal error (prints a message, then exits the program).
+
+#endif //_LOG_H
+
+//EOF