LogTrace - A DLL to log trace output to a file

Environment: MSVC 5.0

The code was designed to build a dll to log trace statements to a text file at customer sites. At the end of the day the customers emails me the text log.
To use the LogTrace.dll in your project add LogTrace.lib to the Object/Library modules in your linker settings and include the header Trace.h to your project.

In your InitInstance() call


	TraceStart();

or

	TraceReadINI();

After that you can call Trace() like printf or TRACE

	Trace("This is my string value [%s]\n", m_strMessage);  //Works like printf or TRACE

Exported functions

TraceStart(char *pszPathName = NULL) A call to TraceStart() will start tracing until end of execution or TraceStop(). The log will default to the directory of the application that called it. You can over ride the default behavior by passing in your own path, file name and file name extension. The existing log is always numerically archived. If more than one instance of an application is executing, then susequent applications will have the post fix 'HMODULE' in the log entries.
TraceReadINI() Reads control values from the applications ini file.

[TRACE]
;Specific log name and path
PathAndFileName=C:\A_TEST\mylog.txt
;1: file will be flushed after every Trace(), 0: no flushing
FLUSH=0

If you use TraceReadINI then you do not have to use TraceStart.
Trace(const char *pszFormat, ...) Works just like TRACE() or printf(). The first parameter can be any length, the sum of the additional parameters is limited to 1024 characters.
TraceSuspend(bool bTrueToSuspend) When true logging is suspended until set back to false.
Default is false
TraceStop() The current log is closed. To continue logging, explicitly call TraceStart(). In the event of multiple programs writing to the same log, the log will not be closed. The next call to TraceStart() will append to the existing log.
TraceClockCapture(char* pszComment = NULL) Captures the current clock value.
TraceClockDuration (char* pszComment = NULL) Writes the number of seconds passed since the last TraceClockCapture().
TraceFlush(bool bForceFlush) You can turn it off to increase performance, but if the application fails you may not get the last several dozen statements logged written to the log file.
Default is true.
TraceWithTime(bool bValue) Causes the Trace() statement to output the time of each trace statement. The year value is not output.
Default is true.

Download source - 10KB



Comments

  • Request for change.

    Posted by Legacy on 02/28/1999 12:00am

    Originally posted by: Brain Koch

    Can this be modified to write to a zipped file, rather than a text file?

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • Live Event Date: May 11, 2015 @ 1:00 p.m. ET / 10:00 a.m. PT One of the languages that have always been supported with the Intel® RealSense™ SDK (Software Developer Kit) is JavaScript, specifically so that web-enabled apps could be created. Come hear from Intel Expert Bob Duffy as he reviews his own little "space shooting" game where the orientation of your face controls the aiming reticle to help teach developers how to write apps and games in JavaScript that can use facial and gesture …

  • There has been growing buzz about DevOps. DevOps is a methodology that unites the often separate functions of software development (Dev) and production and operations (Ops) into a single, integrated, and continuous process. DevOps is about breaking down the barriers between Dev and Ops. It leverages people, processes, and technology to stimulate collaboration and innovation across the entire software development and release process. Dev and Ops should always be part of an integrated process, but that's not …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date