[Plib-devel] ssg error message routines

[Dave M. <dp...@ef...>]

more info on the error routines I added:

	void ssgSetError ( const char* fmt, ... ) ;
	char* ssgGetError ( void ) ;
	void ssgClearError ( void ) ;

Here are some examples of how an application might
handle errors.  If ErrorBox() shows a message to the
user then to handle a fatal load error:

	ent = ssgLoad ( fname ) ;
	if ( ent == NULL ) {
	   ErrorBox ( ssgGetError() ) ;
	}

To handle all load error returns:

	ssgClearError();
	ent = ssgLoad ( fname ) ;
	if ( ent == NULL ) {
	   //fatal error
	   ErrorBox ( ssgGetError() ) ;
	}
	else if ( strcmp(ssgGetError(), "") != 0 ) {
	   //non-fatal errors ... still returned something
	   ErrorBox ( ssgGetError() ) ;
      }

PPE should probably do something like this.

This is how it is done in SDL (Simple Direct Media Layer)
and I would like to do it the same in SSG
unless there are objections.

To handle multiple error messages, the application
could redirect stderr to a file or I could echo errors
to a file in ssgSetError().  which do you prefer?

-- Dave McClurg